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Environ Evid
Environ Evid
Environmental Evidence
2047-2382
BioMed Central London

320
10.1186/s13750-023-00320-3
Systematic Map Protocol
Collating existing evidence on cumulative impacts of invasive plant species in riparian ecosystems of British Columbia, Canada: a systematic map protocol
http://orcid.org/0000-0003-4750-9974
Mologni Fabio fabio.mologni@ubc.ca

1
Moffat Chandra E. 21
Pither Jason 1
1 grid.17091.3e 0000 0001 2288 9830 Department of Biology, and Institute for Biodiversity, Resilience, and Ecosystem Services, I.K. Barber Faculty of Science, University of British Columbia Okanagan, 1177 Research Road, Kelowna, BC V1V 1V7 Canada
2 https://ror.org/051dzs374 grid.55614.33 0000 0001 1302 4958 Agriculture and Agri-Food Canada, Summerland Research and Development Centre, 4200 Highway #97, Summerland, BC V0H 1Z0 Canada
14 12 2023
14 12 2023
2023
12 3120 7 2023
14 11 2023
© The Author(s) 2023
2023
https://creativecommons.org/licenses/by/4.0/ Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
Background

Globally, the structure and functioning of foreshore and riparian ecosystems are being dramatically impacted by non-native invasive plant species. Invasive species can outcompete and replace native species, modify geochemical and hydraulic cycles, alter trophic processes, and change the composition and structure of communities above and below ground. However, these impacts are often investigated in isolation, even though one invasive species might increase or mitigate the impacts of others (i.e. cumulative impacts), potentially with cascading effects. Although cumulative impacts have long been studied within other environmental contexts, research on the cumulative impacts of invasive species is comparatively scarce. We aim to develop a protocol to systematically identify and collate evidence on the individual and cumulative impacts of a set of plant species invasive in foreshore and riparian ecosystems of British Columbia, Canada. Our primary question is: what evidence is available on the individual and cumulative impacts of invasive plants in the riparian and foreshore ecosystems of British Columbia, Canada? In addition, our systematic map will identify the strengths and gaps in knowledge pertaining to invasive plant species impacts in foreshore and riparian ecosystems, with the ultimate goal of facilitating the development of evidence-based management strategies.

Methods

We identified the research topic and the primary and secondary questions with the support of stakeholders. We then devised a flexible string that allows for searching target invasive species. Using this string, we searched the literature for pilot species that aided the iterative development of the protocol. Once all target species are identified, we will carry out a systematic literature search on their impacts. We will search Web of Science and the CABI compendium for invasive species. We will include studies if they (i) refer to the target invasive species, (ii) focus on its environmental impacts and (iii) investigate such impacts in riparian ecosystems (iv) within North America (i.e. Canada and U.S.A.). We will use a two-stage screening process: titles and abstracts first, then the full manuscript. From each source, we will extract impact description, ecosystem component impacted, and magnitude and directionality of impacts. We will include a publicly available database of studies, descriptive statistics, and a narrative summary within our synthesis outcomes.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13750-023-00320-3.

Keywords

Cumulative impacts
British Columbia
Invasive species
Impacts
Riparian ecosystems
Plant invasions
Foreshore ecosystems
Protocol
Systematic maps
http://dx.doi.org/10.13039/501100002747 Ministry of Forests, Lands and Natural Resource Operations Natural Science and Engineering Council of Canada2020-06543 Pither Jason issue-copyright-statement© Collaboration for Environmental Evidence and BioMed Central Ltd. 2023
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pmcBackground

Biological invasions in foreshore and riparian ecosystems

Foreshore and riparian ecosystems are vitally important from ecological, cultural, and economic standpoints. Although their spatial extent is small, they are often hotspots of biodiversity, hosting rare species, and serving as refugia and corridors essential to many others [1–3]. These ecosystems also provide essential functions and services such as improving water quality, flood mitigation, and minimizing erosion [2, 4, 5]. As such, foreshore and riparian habitats are the focus of targeted management and conservation strategies in many countries [6–9].

Despite their recognized importance, foreshore and riparian ecosystems are being impacted by many anthropogenic stressors [10]. Infrastructures (e.g. dams, dyking, channelization) and water management (e.g. water diversion, irrigation, dredging) can radically modify water levels and flow and disrupt natural fluvial dynamics [1, 5, 11, 12]. Contamination and nutrient additions can alter water quality, reduce biodiversity, and promote bioaccumulation [1, 13]. Habitat loss through agriculture, deforestation, and development disproportionately impacts foreshore and riparian zones [1, 14–16], and was estimated to be up to two-thirds in the U.S. alone [17]. Additionally, freshwater ecosystems are oftentimes highly invaded by non-native species due to their proximity to human settlements and their function as dispersal corridors [14, 18–21].

Invasive species can impact riparian ecosystems in various ways, but invasive plants have particularly pervasive impacts on ecosystem structure and functioning. By spreading aggressively, they displace both plant and animal native species [22–25], modify geochemical and hydraulic cycles [26, 27], alter trophic processes [28], and change the composition and structure of communities above and below ground [2, 29]. Additionally, invasive plants alter traditional practices and resource use by Indigenous peoples [28]. The cumulative impacts of invasive plants on riparian ecosystems are potentially profound, but research to quantify such effects remains limited [2, 30].

Here, we aim to develop a framework for systematically collating and mapping evidence on the individual and cumulative impacts of plant species that are invasive within foreshore and riparian ecosystems, and we will apply our protocol to systems in British Columbia, Canada.

Individual and cumulative impacts: definitions, examples and previous work

In invasion ecology, individual impacts are defined as measurable changes caused by non-native species on a target ecosystem [31, 32]. They can vary greatly in type, magnitude, and directionality. For instance, some impacts might be barely detectable (e.g. gene flow through hybridization), while others can produce pronounced, observable effects (e.g. ecosystem dominance). Impacts can be direct (e.g. displacement of native species), but also mediated through other factors (e.g. competition for resources, [31]). Finally, while non-native species have been investigated in large part because of their negative effects, impacts can vary along a continuum from negative to positive [32, 33], and can be ecosystem or context-dependent.

Identifying an impact’s directionality presents some challenges. Negative impacts are typically equated to unfavourable outcomes for humans [32]. However, this approach is strongly biased by the value system and worldview of the researcher [33, 34]. In an effort to minimize subjectivity and value-based identifications of impact directionality, we define as negative or positive any quantifiable reduction or increase in ecosystem properties or attributes (e.g. native species richness and abundance, nutrient cycling, water quality, etc., [32]). For instance, we define as positive an increase in the fitness or number of individuals of a native species but as negative its reduction.

The combination and interaction of multiple individual impacts are referred to as cumulative impacts and many definitions of this concept exist. For the Canadian Environmental Assessment Act (CEAA), they are “changes to the environment that are caused by an action in combination with other past, present and future human actions” [35]. The Council on Environmental Quality (CEQ) suggests impacts have to be incremental [36]. The most well-articulated definition is that of the European Environmental Agency (EEA), which defines them as: ‘the impacts (positive or negative, direct and indirect, long-term and short-term impacts) arising from a range of activities throughout an area or region, where each individual effect may not be significant if taken in isolation. Such impacts can arise from the growing volume of traffic, the combined effect of a number of agriculture measures leading to more intensive production and use of chemicals, etc. Cumulative impacts include a time dimension, since they should calculate the impact on environmental resources resulting from changes brought about by past, present and reasonably foreseeable future actions.” [37]. Consistent elements among these definitions are (1) the combination of multiple individual impacts, (2) a time component and (3) the human agency. While not explicitly stated in the previous definitions, cumulative impacts also have a spatial dimension, or they can accumulate in space as well as temporally [38].

We define cumulative impacts in biological invasions as the combined effect of multiple impacts when at least one is generated by an invasive species. Cumulative impacts include recurrent impacts of a single species and the combined effect of multiple invaders, but also the compounded impact of invading species and other anthropogenic stressors [12]. Our definition incorporates all the elements of previous definitions; however, it is more restrictive, as the primary focus is the impacts of invasive species. Conversely, it includes impacts of any magnitude, type or directionality.

The term ‘cumulative’ might imply that the total effect of multiple impacts is always greater than that of individual impacts. Multiple invaders can collectively increase native species displacement, or enhance topsoil nutrient concentration (additive impacts, [29, 39]). An N-fixer might increase soil nitrogen, facilitating invasions by more competitive nitrophilous species, which in turn will displace natives (multiplicative impacts, [29]). However, additive or multiplicative impacts are not the only potential outcomes. Competition between two invaders might instead reduce their impact per capita. For example, an allopathic species might negatively affect both native and non-native species. In this case, one invader mitigates the impacts of another invader [38].

Despite a long history of research on cumulative impacts within environmental contexts [38], the literature on the cumulative impacts of invasive species is relatively scarce. Most work in biological invasions focuses on a single species or single direct impact [40–45]. Even when multiple impacts are identified, their cumulative effect is rarely considered [30, 46]. This is despite previously proposed theoretical frameworks share some conceptual overlap. One such example is the invasion meltdown, which posits that interactions among invaders might increase their impacts [47]. Critically for our work, little research effort explored the cumulative impacts of invasive plant species in riparian and foreshore ecosystems. Therefore, anticipating a lack of studies on cumulative impacts, we will also include individual impacts in this systematic map.

Topic identification and stakeholder input

There is a clear need for work identifying the cumulative impacts of invasive species in riparian ecosystems. The Province of British Columbia, Ministry of Forests Invasive Plant Program, highlighted the need to synthesize current evidence on the impacts of invasive plant species in riparian and foreshore ecosystems within the province, to inform research and management needs. British Columbia’s riparian and foreshore ecosystems are invaded by numerous highly destructive invasive plant species, such as Russian Olive (Elaeagnus angustifolia), Phragmites (Phragmites australis), Knotweeds (Reynoutria spp., syn. Fallopia), Tree of Heaven (Ailanthus altissima) and Canary reed grass (Phalaris arundinacea). While the impacts of these species have been extensively investigated [42, 48–52], there is no comprehensive assessment of their cumulative impacts.

Stakeholders in the provincial government played a pivotal role in shaping the research topic and refining the scope of the systematic map. Stakeholders include the British Columbia Ministry of Forests, Agriculture and Agri-Food Canada, and the University of British Columbia. Based on their expert knowledge and the available data, they provided a list of 10–15 plant species that are invasive in the target ecosystems and geographic areas, thereby aiding in the identification of specific research questions and objectives. Input from practitioners and other researchers helped refine the approach and the methodology. Through ongoing dialogue and feedback, stakeholders were able to establish clear expectations, develop a robust methodology, and identify appropriate outcomes for the systematic map. In addition to quantifying the cumulative impacts of plant species invasive to riparian ecosystems, stakeholders have identified two additional aspects as essential. First is the development of a reproducible protocol that can be employed in future systematic studies of invasive species impacts. Second is the investigation of how the cumulative impacts of invasive species will vary under current climate change scenarios.

Protocols are a crucial aspect of developing a project, particularly in the case of systematic work [53]. Good protocols need to be transparent, detailed and reproducible, allowing other researchers to replicate their work [53–56]. In this case, we do not simply want to describe our procedure for mapping the existing literature, but we specifically aim to provide a tool that is sufficiently flexible and reproducible to be applied in the investigation of other invasive species or ecosystems.

Climate change is a key contributor to the cumulative impacts of invasive species across both terrestrial and aquatic ecosystems. However, the nature and magnitude of its effect of invasive species’ impacts is often unclear. Interactions between particular invasive plants and the diverse facets of climate change are challenging to predict and likely species- and context-dependent [57]. For instance, while the ranges of many non-native invasive species may expand as temperature rises [58], others may contract or shift in response to both abiotic and biotic factors [57, 59]. Nevertheless, strategies for mitigating negative impacts are sorely needed. A key first step is synthesizing the diverse and extensive research on this topic.

Here, we present a reproducible systematic map protocol [53] for screening, collating, and describing research on the impacts of priority invasive plants in riparian and foreshore ecosystems, and we will apply it to systems in British Columbia. Given their efficacy and comprehensiveness, systematic maps are increasingly common in environmental management [54]. Through the systematic map process, we will identify knowledge clusters and gaps (i.e. areas of high and low concentration of the research effort), and synthesize results within the context of current climate change scenarios. Key outputs will include (1) a robust analytical framework for qualitatively predicting—based on the best available evidence—the cumulative impacts of invasive plants under changing climates and followed by (2) a more detailed assessment for a selection of priority invasive plant species (identified by the BC Ministry of Forests Invasive Alien Plant Program). These outputs will have high utility for policy, planning and strategic, evidence-based decision management of ecosystems impacted by priority invasive plant species in British Columbia.

Objective of the review

We aim to systematically collate and map evidence on the individual and cumulative impacts of a selection of plant species invasive to riparian ecosystems in British Columbia, Canada.

Primary question

What evidence is available on the individual and cumulative impacts of invasive plants in the riparian and foreshore ecosystems of British Columbia, Canada?

Components of the primary question

Population: Riparian and foreshore ecosystems in British Columbia

Exposure: non-native plant species invasive to riparian and foreshore ecosystems of British Columbia

Comparator: No impact or absence of invasive plant species.

Outcome: A synthesis of both the individual and collective cumulative impacts of the selected invasive plant species

Secondary question

We will describe variations in the research effort with regard to:Geography and fluvial systems investigated

Invasive species

Impacts and their directionality (negative, positive, or neutral)

Impacted ecosystem components

Type of study (e.g. correlational, experimental, etc.)

Time (did the level of knowledge change over time?)

Additionally, we will delineate potential changes in impact magnitude by species under current climate change scenarios based on the available literature.

Methods

Search string

We will conduct multiple systematic searches, one for each of our focus species. For each search, we will use as keywords the scientific name of a species and “impact”, formatted for Web of Science (WOS). For example:

Elaeagnus angustifolia AND impact*

The selected search string is purposely broad. Searches including keywords associated with the target ecosystem (riparian, foreshore, freshwater, wetland, aquatic, etc.) and geographic area (British Columbia, Canada, North America, etc.) were deemed to be too restrictive. A broader search allows for capturing additional studies that either use different keywords or investigate impacts in different circumstances and yet might be relevant to the target ecosystem.

We tested the comprehensiveness of searches using two pilot species, the Russian Olive (Elaeagnus angustifolia) and the Canary Reed Grass (Phalaris arundinacea). For each species, we selected 5 primary articles, which used a variety of keywords (e.g. impact, effect, alter, change, consequence, see Additional file 1: Appendix 1 for the full list). Then, we used the search strings to extract studies from WOS and we extracted references from CABI and review studies for pilot species. All studies were detected by search strings. These two species aided the iterative development of the protocol and will be included in the systematic map.

Bibliographic sources

We will conduct searches in WOS, accessing the core database using an institutional licence (University of British Columbia). The core database assigns metadata to a study based exclusively on the information provided by the publisher and journal. Since other databases assign additional metadata to a study, some material might go undetected despite meeting our criteria. We will expand our search to all databases and then refine it to the core collection. This will identify studies that match our keywords across all databases but are only present in the core collection, and thus accessible to the authors (Mathew Vis-Dunbar, UBC librarian, pers. comm. 2023). Additionally, we will screen all references in the CABI Invasive Species Compendium factsheet for each species, except for references in the Distribution References section. Review studies that fit the criteria for inclusion will be used as sources as well, and references extracted and screened.

We will also scope organization websites across North America at different administrative levels. We will assess international (outside Canada), federal (Canada), provincial (British Columbia) and local (regions within British Columbia) organizations. We will search for the focus species name and the word “invasive” in the following organization websites:Canadian Weed Society

British Columbia Inter-Ministry Invasive Species Working Group

Canadian Council of Invasive Species

Invasive Species Centre

Okanagan Basin Waterboard

North American Invasive Species Management Association (NAISMA)

The National Environmental Coalition on Invasive Species (NECIS)

United States Department of Agriculture (USDA)

National Invasive Species Council

All local associations in British Columbia (e.g. Boundary Invasive Species Society, East Kootenay Invasive Species Council, Okanagan and Similkameen Invasive Species Society, etc.)

We will conduct the same query in the following searchable catalogues of government documents:Canadian Federal Science Library Network

Legislative library of British Columbia

These sources will allow for capturing also the grey literature. WOS identifies dissertations and conference proceedings, especially if expanding searches to all databases, while the CABI, review papers and organizational websites will identify technical reports.

Accessing multiple databases will help reduce location and index biases (i.e. not all journals are indexed in all databases, incomplete or poor indexing, [45]).

Screening and inclusion criteria

The screening process will include two stages. First, we will screen titles and abstracts. If the information is insufficient to make a decision, we will assess the full manuscript as well. These steps will be applied to all studies, regardless of the source they were extracted from. A single reviewer will conduct the screening (FM). A random subset of studies will also be assessed by a second reviewer (JP) at both stages (Stage 1 = 5%, Stage 2 = 10%). We will appraise consistency using Cohen’s kappa statistics and set 0.6 as a threshold [60, 61]. If consistency is below the cut-off limit, screening and inclusion criteria will be adjusted for clarity. All disagreements will be discussed and resolved. Any study authored by one of the systematic reviewers that meets the criteria for inclusion will be assessed by the other reviewer at every stage of the process.

We will screen both commercially published and grey literature, but not personal communications or expert opinions. Including grey literature reduces the risk of publication and citation biases (i.e. significant results are more likely to be published and cited than non-significant results, [45, 48]). We will consider only material in English. To minimize language bias (i.e. significant results are more likely to be published in English, [45, 48]), we will assess the title and abstract if translated into English. Studies will be included irrespective of the magnitude, type or directionality of the impact (negative, positive or neutral), and irrespective of the statistical significance of reported results. This will help reduce the prevailing paradigm bias (i.e. a bias towards studies supporting the prevailing paradigm; in this case, invasive species’ impacts are extensive and negative, [26, 45, 48]). The time span includes all studies up to the day the search will be conducted, countering temporal bias (i.e. older studies might be overlooked, [45, 54]). Finally, we will include studies regardless of study design (e.g. experimental, observational, etc.).

We will include studies if they:Refer to the non-native invasive plant species searched. We defined as invasive widespread, impactful non-native species.

Focus on its abiotic and biotic impacts. We defined impacts as measurable changes caused by non-native species on a target ecosystem.

Investigate such impacts in riparian and foreshore ecosystems. Riparian ecosystems are defined as areas adjacent to streams or rivers (flowing water), while foreshore ecosystems are defined as the land adjacent to still (non-flowing) water bodies.

Within North America (i.e. Canada and U.S.A.).

We will include all studies in North America because many environmental conditions and invasive species will be shared between British Columbia and other regions within Canada and the U.S. However, including all studies in North America might capture information not relevant to British Columbia. For instance, studies might investigate the impacts of invasive plant species on abiotic and biotic components absent in our study system. Such cases will be excluded, and exclusions justified. Similarly, we will justify all other exceptions [62].

Study validity assessment

We assessed the validity of each study based only on the eligibility criteria.

Data coding

For each study at the full-text screening stage, we will provide the following information:Bibliographic informationAuthors list

Article title

Publication year

Bibliographic source

Inclusion criteriaExposure: Focuses on target species (Y/N)

Exposure: Focuses on abiotic and biotic impacts (Y/N)

Population: Focuses on riparian and foreshore ecosystems (Y/N)

Population: Within North America (Y/N)

Screening stageExcluded at full-text stage

Included

Exceptions

Additional informationDuplicate (Y/N)

Notes

For included studies only, we will provide also the following information:Bibliographic informationAuthors list

Article title

Publication year

Information on impactsImpact description

Ecosystem component impacted (e.g. species, soil, etc.)

Magnitude of impact

Impact direction (negative, positive, neutral)

Additional informationGeographic region

Study Design (i.e. field or laboratory experiment, correlation or direct observation)

Notes

We will compile subsection 3c. Exceptions on a case-by-case basis. For included studies, we will provide information by impact so that if a study investigated more than one, there will be a number of entries equivalent to the number of impacts assessed.

Meta-data extraction

Studies included in the systematic literature map will undergo a full-manuscript screening to identify the investigated impact (or impacts). We will provide a description of the investigated impacts and the ecosystem component impacted. Then, we will categorize impacts by their magnitude and directionality. Impacts magnitude will be assessed following previous work, modified to include both positive and negative impacts [30–32]:Minimal: The impact is unlikely or negligible.

Minor: It causes changes in the fitness of individuals in the native biota, but no changes in native population densities.

Moderate: It causes changes in the population densities of native species, but no changes to the structure of communities or the abiotic or biotic components of ecosystems.

Major: It causes the local or population extinction/introduction of at least one native species, and leads to reversible/transient changes in the structure of communities and the abiotic or biotic components of ecosystems.

Massive: It leads to the replacement and local extinction/introduction of multiple native species, and produces irreversible changes in the structure of communities and the abiotic or biotic components of ecosystems.

Synthesis and presentation

For each species, we will provide a first database with all studies included at the full-text screening and a reason for exclusions at this stage. A second database with the studies included in the map, along with a graphical representation of the screening process. Both databases will contain corresponding coded metadata (see Data Coding section). We will import studies included in the review into a reference manager and share them as a public library to facilitate accessibility. We will develop a graphical representation of riparian ecosystems, representing identified impacts and their magnitude and directionality for each species. Then, we will create a matrix combining multiple species (as rows) and impacts (as columns) to illustrate the collective impacts of the focus species. Descriptive statistics will be used to answer secondary questions. We will provide the geographic distribution of studies, visualize publication trends over time, and illustrate differences in species and impacts research effort. We will use co-occurrence matrices to identify research effort biases [63]. Lastly, we will provide a narrative synthesis of results for both main and secondary questions. The narrative synthesis will focus on (i) species and impact prioritization, (ii) clusters and gaps in present knowledge, (iii) predicted variations in impact magnitude and direction under current climate change scenarios, and (iv) avenues for future research.

Supplementary Information

Additional file 1. List of primary studies selected for the comprehensiveness assessment of the searches.

Additional file 2. ROSES Checklist.

Acknowledgements

We thank Mathew Vis-Dunbar (UBC librarian) for support and guidance in developing search strings and extracting information from bibliographic databases. We thank all the stakeholders for the feedback provided throughout the process.

Author contributions

FM drafted the protocol with input from JP and CM. All authors read and approved the final manuscript.

Funding

FM is funded by the Ministry of Forests, British Columbia, Canada, and by the Irving K. Faculty of Science at the Okanagan campus of UBC. JP acknowledges financial support from the Natural Science and Engineering Council of Canada (Discovery Grant 2020-06543).

Availability of data and materials

Data sharing is not applicable to this article as no datasets were generated or analyzed during the current study.

Declarations

Ethics approval and consent to participate

Not applicable.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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References

1. Poff B Koestner KA Neary DG Henderson V Threats to riparian ecosystems in western north America: an analysis of existing literature JAWRA J Am Water Resour Assoc 2011 47 6 1241 1254 10.1111/j.1752-1688.2011.00571.x
Poff B, Koestner KA, Neary DG, Henderson V. Threats to riparian ecosystems in western north America: an analysis of existing literature. JAWRA J Am Water Resour Assoc. 2011;47(6):1241–54.10.1111/j.1752-1688.2011.00571.x
2. Stella JC Rodríguez-González PM Dufour S Bendix J Riparian vegetation research in Mediterranean-climate regions: common patterns, ecological processes, and considerations for management Hydrobiologia 2013 719 1 291 315 10.1007/s10750-012-1304-9
Stella JC, Rodríguez-González PM, Dufour S, Bendix J. Riparian vegetation research in Mediterranean-climate regions: common patterns, ecological processes, and considerations for management. Hydrobiologia. 2013;719(1):291–315.10.1007/s10750-012-1304-9
3. Ragan K Schipper J Bateman HL Hall SJ Mammal use of riparian corridors in semi-arid Sonora, Mexico J Wildl Manag 2023 87 1 e22322 10.1002/jwmg.22322
Ragan K, Schipper J, Bateman HL, Hall SJ. Mammal use of riparian corridors in semi-arid Sonora, Mexico. J Wildl Manag. 2023;87(1):e22322.10.1002/jwmg.22322
4. Koundouri P Boulton AJ Datry T Souliotis I Datry T Bonada N Boulton AJ Ecosystem services, values, and societal perceptions of intermittent rivers and ephemeral streams Intermittent rivers and ephemeral streams 2017 Amsterdam Elsevier 455 76
Koundouri P, Boulton AJ, Datry T, Souliotis I. Ecosystem services, values, and societal perceptions of intermittent rivers and ephemeral streams. In: Datry T, Bonada N, Boulton AJ, editors. Intermittent rivers and ephemeral streams. Amsterdam: Elsevier; 2017. p. 455–76.
5. Patten DT Riparian ecosytems of semi-arid North America: diversity and human impacts Wetlands 1998 18 4 498 512 10.1007/BF03161668
Patten DT. Riparian ecosytems of semi-arid North America: diversity and human impacts. Wetlands. 1998;18(4):498–512.10.1007/BF03161668
6. Knopf FL Johnson RR Rich T Samson FB Szaro RC Conservation of riparian ecosystems in the United States Wilson Bull 1988 100 2 272 284
Knopf FL, Johnson RR, Rich T, Samson FB, Szaro RC. Conservation of riparian ecosystems in the United States. Wilson Bull. 1988;100(2):272–84.
7. Erős T Kuehne L Dolezsai A Sommerwerk N Wolter C A systematic review of assessment and conservation management in large floodplain rivers: actions postponed Ecol Ind 2019 98 453 461 10.1016/j.ecolind.2018.11.026
Erős T, Kuehne L, Dolezsai A, Sommerwerk N, Wolter C. A systematic review of assessment and conservation management in large floodplain rivers: actions postponed. Ecol Ind. 2019;98:453–61.10.1016/j.ecolind.2018.11.026
8. Fryirs KA Zhang N Duxbury E Ralph T Fryirs KA Zhang N Rivers up in smoke: impacts of Australia’s 2019–2020 megafires on riparian systems Int J Wildland Fire 2022 31 7 720 727 10.1071/WF22046
Fryirs KA, Zhang N, Duxbury E, Ralph T, Fryirs KA, Zhang N, et al. Rivers up in smoke: impacts of Australia’s 2019–2020 megafires on riparian systems. Int J Wildland Fire. 2022;31(7):720–7.10.1071/WF22046
9. Brierley GJ Hikuroa D Fuller IC Tunnicliffe J Allen K Brasington J Reanimating the strangled rivers of Aotearoa New Zealand WIREs Water 2023 10 2 e1624 10.1002/wat2.1624
Brierley GJ, Hikuroa D, Fuller IC, Tunnicliffe J, Allen K, Brasington J, et al. Reanimating the strangled rivers of Aotearoa New Zealand. WIREs Water. 2023;10(2):e1624.10.1002/wat2.1624
10. Stella JC Bendix J Sabater S Elosegi A Ludwig R Chapter 5-Multiple stressors in riparian ecosystems Multiple stressors in river ecosystems 2019 Amsterdam Elsevier 81 110
Stella JC, Bendix J. Chapter 5-Multiple stressors in riparian ecosystems. In: Sabater S, Elosegi A, Ludwig R, editors. Multiple stressors in river ecosystems. Amsterdam: Elsevier; 2019. p. 81–110.
11. Airoldi L Beck M Gibson R Atkinson R Gordon J Loss, status and trends for coastal marine habitats of Europe Oceanography and marine biology: an annual review 2007 Boca Raton CRC Press 345 405
Airoldi L, Beck M. Loss, status and trends for coastal marine habitats of Europe. In: Gibson R, Atkinson R, Gordon J, editors. Oceanography and marine biology: an annual review, vol. 20074975. Boca Raton: CRC Press; 2007. p. 345–405.
12. Johnson PT Olden JD Vander Zanden MJ Dam invaders: impoundments facilitate biological invasions into freshwaters Front Ecol Environ 2008 6 7 357 363 10.1890/070156
Johnson PT, Olden JD, Vander Zanden MJ. Dam invaders: impoundments facilitate biological invasions into freshwaters. Front Ecol Environ. 2008;6(7):357–63.10.1890/070156
13. Chiu MC Leigh C Mazor R Cid N Resh V Datry T Bonada N Boulton A Anthropogenic threats to intermittent rivers and ephemeral streams Intermittent rivers and ephemeral streams 2017 Amsterdam Elsevier 433 54
Chiu MC, Leigh C, Mazor R, Cid N, Resh V. Anthropogenic threats to intermittent rivers and ephemeral streams. In: Datry T, Bonada N, Boulton A, editors. Intermittent rivers and ephemeral streams. Amsterdam: Elsevier; 2017. p. 433–54.
14. Greene SL A roadmap for riparian invasion research River Res Appl 2014 30 5 663 669 10.1002/rra.2659
Greene SL. A roadmap for riparian invasion research. River Res Appl. 2014;30(5):663–9.10.1002/rra.2659
15. Post GC Chang H Banis D The spatial relationship between patterns of disappeared streams and residential development in Portland, Oregon, USA J Maps 2022 18 2 210 218 10.1080/17445647.2022.2035264
Post GC, Chang H, Banis D. The spatial relationship between patterns of disappeared streams and residential development in Portland, Oregon, USA. J Maps. 2022;18(2):210–8.10.1080/17445647.2022.2035264
16. Sweeney BW Bott TL Jackson JK Kaplan LA Newbold JD Standley LJ Riparian deforestation, stream narrowing, and loss of stream ecosystem services Proc Natl Acad Sci 2004 101 39 14132 14137 10.1073/pnas.0405895101 15381768
Sweeney BW, Bott TL, Jackson JK, Kaplan LA, Newbold JD, Standley LJ, et al. Riparian deforestation, stream narrowing, and loss of stream ecosystem services. Proc Natl Acad Sci. 2004;101(39):14132–7.15381768 10.1073/pnas.0405895101
17. Swift BL Status of riparian ecosystems in the United States JAWRA J Am Water Resour Assoc 1984 20 2 223 228 10.1111/j.1752-1688.1984.tb04675.x
Swift BL. Status of riparian ecosystems in the United States. JAWRA J Am Water Resour Assoc. 1984;20(2):223–8.10.1111/j.1752-1688.1984.tb04675.x
18. Aguiar FCF Ferreira MT Plant invasions in the rivers of the Iberian Peninsula, south-western Europe: a review Plant Biosyst 2013 147 4 1107 1119 10.1080/11263504.2013.861539
Aguiar FCF, Ferreira MT. Plant invasions in the rivers of the Iberian Peninsula, south-western Europe: a review. Plant Biosyst. 2013;147(4):1107–19.10.1080/11263504.2013.861539
19. Arianoutsou M Delipetrou P Celesti-Grapow L Basnou C Bazos I Kokkoris Y Comparing naturalized alien plants and recipient habitats across an east–west gradient in the Mediterranean Basin J Biogeogr 2010 37 9 1811 1823 10.1111/j.1365-2699.2010.02324.x
Arianoutsou M, Delipetrou P, Celesti-Grapow L, Basnou C, Bazos I, Kokkoris Y, et al. Comparing naturalized alien plants and recipient habitats across an east–west gradient in the Mediterranean Basin. J Biogeogr. 2010;37(9):1811–23.10.1111/j.1365-2699.2010.02324.x
20. Kowarik I Säumel I Water dispersal as an additional pathway to invasions by the primarily wind-dispersed tree Ailanthus altissima Plant Ecol 2008 198 2 241 252 10.1007/s11258-008-9398-x
Kowarik I, Säumel I. Water dispersal as an additional pathway to invasions by the primarily wind-dispersed tree Ailanthus altissima. Plant Ecol. 2008;198(2):241–52.10.1007/s11258-008-9398-x
21. Pysek P Prach K Plant invasions and the role of riparian habitats: a comparison of four species alien to Central Europe J Biogeogr 1993 20 4 413 420 10.2307/2845589
Pysek P, Prach K. Plant invasions and the role of riparian habitats: a comparison of four species alien to Central Europe. J Biogeogr. 1993;20(4):413–20.10.2307/2845589
22. Barnes WJ The rapid growth of a population of reed canarygrass (Phalaris arundinacea L.) and Its Impact on some riverbottom herbs J Torrey Bot Soc 1999 126 2 133 8 10.2307/2997289
Barnes WJ. The rapid growth of a population of reed canarygrass (Phalaris arundinacea L.) and Its Impact on some riverbottom herbs. J Torrey Bot Soc. 1999;126(2):133–8.10.2307/2997289
23. Price EPF Spyreas G Matthews JW Biotic homogenization of regional wetland plant communities within short time-scales in the presence of an aggressive invader J Ecol 2018 106 3 1180 1190 10.1111/1365-2745.12883
Price EPF, Spyreas G, Matthews JW. Biotic homogenization of regional wetland plant communities within short time-scales in the presence of an aggressive invader. J Ecol. 2018;106(3):1180–90.10.1111/1365-2745.12883
24. Bateman HL Chung-MacCoubrey A Snell HL Impact of non-native plant removal on lizards in riparian habitats in the southwestern United States Restor Ecol 2008 16 1 180 190 10.1111/j.1526-100X.2007.00361.x
Bateman HL, Chung-MacCoubrey A, Snell HL. Impact of non-native plant removal on lizards in riparian habitats in the southwestern United States. Restor Ecol. 2008;16(1):180–90.10.1111/j.1526-100X.2007.00361.x
25. Pendleton R Pendleton B Finch D Displacement of native riparian shrubs by woody exotics: effects on arthropod and pollinator community composition Nat Resour Environ Issues 2011 16 1 25
Pendleton R, Pendleton B, Finch D. Displacement of native riparian shrubs by woody exotics: effects on arthropod and pollinator community composition. Nat Resour Environ Issues. 2011;16(1):25.
26. Martinez AE McDowell PF Invasive reed canarygrass (Phalaris arundinacea) and native vegetation channel roughness Invasive Plant Sci Manag 2016 9 1 12 21 10.1614/IPSM-D-15-00046.1
Martinez AE, McDowell PF. Invasive reed canarygrass (Phalaris arundinacea) and native vegetation channel roughness. Invasive Plant Sci Manag. 2016;9(1):12–21.10.1614/IPSM-D-15-00046.1
27. Simons SB Seastedt TR Decomposition and nitrogen release from foliage of cottonwood (Populus deltoides) and Russian-olive (Elaeagnus angustifolia) in a riparian ecosystem Southwest Nat 1999 44 3 256 260
Simons SB, Seastedt TR. Decomposition and nitrogen release from foliage of cottonwood (Populus deltoides) and Russian-olive (Elaeagnus angustifolia) in a riparian ecosystem. Southwest Nat. 1999;44(3):256–60.
28. Mineau MM Baxter CV Marcarelli AM A non-native riparian tree (Elaeagnus angustifolia) changes nutrient dynamics in streams Ecosystems 2011 14 3 353 365 10.1007/s10021-011-9415-0
Mineau MM, Baxter CV, Marcarelli AM. A non-native riparian tree (Elaeagnus angustifolia) changes nutrient dynamics in streams. Ecosystems. 2011;14(3):353–65.10.1007/s10021-011-9415-0
29. Jacinthe PA Bills JS Tedesco LP Size, activity and catabolic diversity of the soil microbial biomass in a wetland complex invaded by reed canary grass Plant Soil 2010 329 1 227 238 10.1007/s11104-009-0147-2
Jacinthe PA, Bills JS, Tedesco LP. Size, activity and catabolic diversity of the soil microbial biomass in a wetland complex invaded by reed canary grass. Plant Soil. 2010;329(1):227–38.10.1007/s11104-009-0147-2
30. Katsanevakis S Tempera F Teixeira H Mapping the impact of alien species on marine ecosystems: the Mediterranean Sea case study Divers Distrib 2016 22 6 694 707 10.1111/ddi.12429
Katsanevakis S, Tempera F, Teixeira H. Mapping the impact of alien species on marine ecosystems: the Mediterranean Sea case study. Divers Distrib. 2016;22(6):694–707.10.1111/ddi.12429
31. Blackburn TM Essl F Evans T Hulme PE Jeschke JM Kühn I A unified classification of alien species based on the magnitude of their environmental impacts PLoS Biol 2014 12 5 e1001850 10.1371/journal.pbio.1001850 24802715
Blackburn TM, Essl F, Evans T, Hulme PE, Jeschke JM, Kühn I, et al. A unified classification of alien species based on the magnitude of their environmental impacts. PLoS Biol. 2014;12(5):e1001850.24802715 10.1371/journal.pbio.1001850
32. Vimercati G Probert AF Volery L Bernardo-Madrid R Bertolino S Céspedes V The EICAT+ framework enables classification of positive impacts of alien taxa on native biodiversity PLoS Biol 2022 20 8 e3001729 10.1371/journal.pbio.3001729 35972940
Vimercati G, Probert AF, Volery L, Bernardo-Madrid R, Bertolino S, Céspedes V, et al. The EICAT+ framework enables classification of positive impacts of alien taxa on native biodiversity. PLoS Biol. 2022;20(8):e3001729.35972940 10.1371/journal.pbio.3001729
33. Sax DF Schlaepfer MA Olden JD Identifying key points of disagreement in non-native impacts and valuations Trends Ecol Evolut 2023 10.1016/j.tree.2023.03.004
Sax DF, Schlaepfer MA, Olden JD. Identifying key points of disagreement in non-native impacts and valuations. Trends Ecol Evolut. 2023. 10.1016/j.tree.2023.03.004.10.1016/j.tree.2023.03.004
34. Cardou F Vellend M Stealth advocacy in ecology and conservation biology Biol Cons 2023 280 109968 10.1016/j.biocon.2023.109968
Cardou F, Vellend M. Stealth advocacy in ecology and conservation biology. Biol Cons. 2023;280:109968.10.1016/j.biocon.2023.109968
35. Canadian Environmental Assessment Agency. Cumulative effects assessment practitioners guide. Ottawa. 1999.
36. Council on Environmental Quality. National environmental policy act— cumulative effects.
37. European Environment Agency. Cumulative Impacts. https://www.eea.europa.eu/help/glossary/eea-glossary/cumulative-impacts. Accessed July 2023.
38. Spaling H Smit B Cumulative environmental change: conceptual frameworks, evaluation approaches, and institutional perspectives Environ Manage 1993 17 5 587 600 10.1007/BF02393721
Spaling H, Smit B. Cumulative environmental change: conceptual frameworks, evaluation approaches, and institutional perspectives. Environ Manage. 1993;17(5):587–600.10.1007/BF02393721
39. Collier N Austin BJ Bradshaw CJA McMahon CR Turning pests into profits: introduced buffalo provide multiple benefits to indigenous people of northern Australia Hum Ecol 2011 39 2 155 164 10.1007/s10745-010-9365-8
Collier N, Austin BJ, Bradshaw CJA, McMahon CR. Turning pests into profits: introduced buffalo provide multiple benefits to indigenous people of northern Australia. Hum Ecol. 2011;39(2):155–64.10.1007/s10745-010-9365-8
40. Follstad Shah JJ Harner MJ Tibbets TM Elaeagnus angustifolia elevates soil inorganic nitrogen pools in riparian ecosystems Ecosystems 2010 13 1 46 61 10.1007/s10021-009-9299-4
Follstad Shah JJ, Harner MJ, Tibbets TM. Elaeagnus angustifolia elevates soil inorganic nitrogen pools in riparian ecosystems. Ecosystems. 2010;13(1):46–61.10.1007/s10021-009-9299-4
41. Spyreas G Wilm BW Plocher AE Ketzner DM Matthews JW Ellis JL Biological consequences of invasion by reed canary grass (Phalaris arundinacea) Biol Invasions 2010 12 5 1253 1267 10.1007/s10530-009-9544-y
Spyreas G, Wilm BW, Plocher AE, Ketzner DM, Matthews JW, Ellis JL, et al. Biological consequences of invasion by reed canary grass (Phalaris arundinacea). Biol Invasions. 2010;12(5):1253–67.10.1007/s10530-009-9544-y
42. Rojas IM Zedler JB An invasive exotic grass reduced sedge meadow species richness by half Wetlands Ecol Manage 2015 23 4 649 663 10.1007/s11273-015-9409-3
Rojas IM, Zedler JB. An invasive exotic grass reduced sedge meadow species richness by half. Wetlands Ecol Manage. 2015;23(4):649–63.10.1007/s11273-015-9409-3
43. Katz GL Tuttle GM Denslow MW Norton AP Legacy effects of Russian olive (Elaeagnus angustifolia L.) in a riparian ecosystem three years post-removal Wetlands 2020 40 6 1897 907 10.1007/s13157-020-01385-3
Katz GL, Tuttle GM, Denslow MW, Norton AP. Legacy effects of Russian olive (Elaeagnus angustifolia L.) in a riparian ecosystem three years post-removal. Wetlands. 2020;40(6):1897–907.10.1007/s13157-020-01385-3
44. Gallego-Tévar B Grewell BJ Whitcraft CR Futrell JC Bárcenas-Moreno G Castillo JM Contrasted impacts of yellow flag iris (Iris pseudacorus) on plant diversity in tidal wetlands within its native and invaded distribution ranges Diversity 2022 14 5 326 10.3390/d14050326
Gallego-Tévar B, Grewell BJ, Whitcraft CR, Futrell JC, Bárcenas-Moreno G, Castillo JM. Contrasted impacts of yellow flag iris (Iris pseudacorus) on plant diversity in tidal wetlands within its native and invaded distribution ranges. Diversity. 2022;14(5):326.10.3390/d14050326
45. Rodgers VL Scanga SE Kolozsvary MB Garneau DE Kilgore JS Anderson LJ Where is garlic mustard? Understanding the ecological context for invasions of Alliaria petiolata Bioscience 2022 72 6 521 537 10.1093/biosci/biac012 35677290
Rodgers VL, Scanga SE, Kolozsvary MB, Garneau DE, Kilgore JS, Anderson LJ, et al. Where is garlic mustard? Understanding the ecological context for invasions of Alliaria petiolata. Bioscience. 2022;72(6):521–37.35677290 10.1093/biosci/biac012
46. Vanderhoeven S Dassonville N Meerts P Increased topsoil mineral nutrient concentrations under exotic invasive plants in Belgium Plant Soil 2005 275 1 169 179 10.1007/s11104-005-1257-0
Vanderhoeven S, Dassonville N, Meerts P. Increased topsoil mineral nutrient concentrations under exotic invasive plants in Belgium. Plant Soil. 2005;275(1):169–79.10.1007/s11104-005-1257-0
47. Simberloff D Von Holle B Positive interactions of nonindigenous species: invasional meltdown? Biol Invasions 1999 1 1 21 32 10.1023/A:1010086329619
Simberloff D, Von Holle B. Positive interactions of nonindigenous species: invasional meltdown? Biol Invasions. 1999;1(1):21–32.10.1023/A:1010086329619
48. Benoit LK Askins RA Impact of the spread of Phragmites on the distribution of birds in Connecticut tidal marshes Wetlands 1999 19 1 194 208 10.1007/BF03161749
Benoit LK, Askins RA. Impact of the spread of Phragmites on the distribution of birds in Connecticut tidal marshes. Wetlands. 1999;19(1):194–208.10.1007/BF03161749
49. Brooks RK Barney JN Salom SM The invasive tree, Ailanthus altissima, impacts understory nativity, not seedbank nativity For Ecol Manage 2021 489 119025 10.1016/j.foreco.2021.119025
Brooks RK, Barney JN, Salom SM. The invasive tree, Ailanthus altissima, impacts understory nativity, not seedbank nativity. For Ecol Manage. 2021;489:119025.10.1016/j.foreco.2021.119025
50. Claeson SM LeRoy CJ Barry JR Kuehn KA Impacts of invasive riparian knotweed on litter decomposition, aquatic fungi, and macroinvertebrates Biol Invasions 2014 16 7 1531 1544 10.1007/s10530-013-0589-6
Claeson SM, LeRoy CJ, Barry JR, Kuehn KA. Impacts of invasive riparian knotweed on litter decomposition, aquatic fungi, and macroinvertebrates. Biol Invasions. 2014;16(7):1531–44.10.1007/s10530-013-0589-6
51. Katz GL Shafroth PB Biology, ecology and management of Elaeagnus angustifolia L. (Russian olive) in western North America Wetlands 2003 23 4 763 77 10.1672/0277-5212(2003)023[0763:BEAMOE]2.0.CO;2
Katz GL, Shafroth PB. Biology, ecology and management of Elaeagnus angustifolia L. (Russian olive) in western North America. Wetlands. 2003;23(4):763–77.10.1672/0277-5212(2003)023[0763:BEAMOE]2.0.CO;2
52. Medina-Villar S Rodríguez-Echeverría S Lorenzo P Alonso A Pérez-Corona E Castro-Díez P Impacts of the alien trees Ailanthus altissima (Mill.) Swingle and Robinia pseudoacacia L. on soil nutrients and microbial communities Soil Biol Biochem 2016 96 65 73 10.1016/j.soilbio.2016.01.015
Medina-Villar S, Rodríguez-Echeverría S, Lorenzo P, Alonso A, Pérez-Corona E, Castro-Díez P. Impacts of the alien trees Ailanthus altissima (Mill.) Swingle and Robinia pseudoacacia L. on soil nutrients and microbial communities. Soil Biol Biochem. 2016;96:65–73.10.1016/j.soilbio.2016.01.015
53. Pullin AS, Frampton GK, Livoreil B, Petrokofsky G. Collaboration for Environmental Evidence. Guidelines and standards for evidence synthesis in environmental management. Version 5.1. 2022. https://environmentalevidence.org/information-for-authors/. Accessed July 2023.
54. Haddaway NR Bernes C Jonsson BG Hedlund K The benefits of systematic mapping to evidence-based environmental management Ambio 2016 45 5 613 620 10.1007/s13280-016-0773-x 26984257
Haddaway NR, Bernes C, Jonsson BG, Hedlund K. The benefits of systematic mapping to evidence-based environmental management. Ambio. 2016;45(5):613–20.26984257 10.1007/s13280-016-0773-x
55. Haddaway NR Macura B Whaley P Pullin AS ROSES RepOrting standards for systematic evidence syntheses: pro forma, flow-diagram and descriptive summary of the plan and conduct of environmental systematic reviews and systematic maps Environ Evid 2018 7 1 7 10.1186/s13750-018-0121-7
Haddaway NR, Macura B, Whaley P, Pullin AS. ROSES RepOrting standards for systematic evidence syntheses: pro forma, flow-diagram and descriptive summary of the plan and conduct of environmental systematic reviews and systematic maps. Environ Evid. 2018;7(1):7.10.1186/s13750-018-0121-7
56. Palacio FX Callaghan CT Cardoso P Hudgins EJ Jarzyna MA Ottaviani G A protocol for reproducible functional diversity analyses Ecography 2022 2022 11 e06287 10.1111/ecog.06287
Palacio FX, Callaghan CT, Cardoso P, Hudgins EJ, Jarzyna MA, Ottaviani G, et al. A protocol for reproducible functional diversity analyses. Ecography. 2022;2022(11):e06287.10.1111/ecog.06287
57. Bellard C Thuiller W Leroy B Genovesi P Bakkenes M Courchamp F Will climate change promote future invasions? Glob Chang Biol 2013 19 12 3740 3748 10.1111/gcb.12344 23913552
Bellard C, Thuiller W, Leroy B, Genovesi P, Bakkenes M, Courchamp F. Will climate change promote future invasions? Glob Chang Biol. 2013;19(12):3740–8.23913552 10.1111/gcb.12344
58. Perry LG Reynolds LV Shafroth PB Divergent effects of land-use, propagule pressure, and climate on woody riparian invasion Biol Invasions 2018 20 11 3271 3295 10.1007/s10530-018-1773-5
Perry LG, Reynolds LV, Shafroth PB. Divergent effects of land-use, propagule pressure, and climate on woody riparian invasion. Biol Invasions. 2018;20(11):3271–95.10.1007/s10530-018-1773-5
59. Poland TM Patel-Weynand T Finch DM Miniat CF Hayes DC Lopez VM Invasive species in forests and rangelands of the United States: a comprehensive science synthesis for the United States Forest Sector 2021 Cham Springer International Publishing
Poland TM, Patel-Weynand T, Finch DM, Miniat CF, Hayes DC, Lopez VM. Invasive species in forests and rangelands of the United States: a comprehensive science synthesis for the United States Forest Sector. Cham: Springer International Publishing; 2021.
60. Ridley FA McGowan PJ Mair L The scope and extent of literature that maps threats to species: a systematic map protocol Environ Evid 2020 9 1 23 10.1186/s13750-020-00206-8
Ridley FA, McGowan PJ, Mair L. The scope and extent of literature that maps threats to species: a systematic map protocol. Environ Evid. 2020;9(1):23.10.1186/s13750-020-00206-8
61. Cohen J A coefficient of agreement for nomimal scales Educ Psychol Meas 1960 20 2746 10.1177/001316446002000104
Cohen J. A coefficient of agreement for nomimal scales. Educ Psychol Meas. 1960;20:2746.10.1177/001316446002000104
62. O’Dea RE Lagisz M Jennions MD Koricheva J Noble DWA Parker TH Preferred reporting items for systematic reviews and meta-analyses in ecology and evolutionary biology: a PRISMA extension Biol Rev 2021 96 5 1695 1722 10.1111/brv.12721 33960637
O’Dea RE, Lagisz M, Jennions MD, Koricheva J, Noble DWA, Parker TH, et al. Preferred reporting items for systematic reviews and meta-analyses in ecology and evolutionary biology: a PRISMA extension. Biol Rev. 2021;96(5):1695–722.33960637 10.1111/brv.12721
63. Ridley FA Hickinbotham EJ Suggitt AJ McGowan PJK Mair L The scope and extent of literature that maps threats to species globally: a systematic map Environ Evid 2022 11 1 1 26 10.1186/s13750-022-00279-7 38264537
Ridley FA, Hickinbotham EJ, Suggitt AJ, McGowan PJK, Mair L. The scope and extent of literature that maps threats to species globally: a systematic map. Environ Evid. 2022;11(1):1–26.38264537 10.1186/s13750-022-00279-7
