Landscape context is more important than wetland buffers for farmland amphibians

Sawatzky, Margaret; Martin, Amanda; Fahrig, Lenore

doi:10.1016/j.agee.2018.09.021

Cited by 27 publications

(18 citation statements)

References 41 publications

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“…As predicted by the theory of population genetics, the isolation of amphibian populations decreases genetic diversity as a result of gene flow impediment, genetic drift, and inbreeding when the effective population size is small (Andersen et al, 2004;Broquet et al, 2010;Rhoads et al, 2017). Several studies have established a negative relationship between gene flow and the resistance of the landscape matrix, which is related to agricultural intensification and the expansion of urbanization (Stevens et al, 2006;Van Buskirk, 2012;Crawford et al, 2016;Sawatzky et al, 2019). The barrier role of highways varies depending on the studied species, the age of the infrastructure, and, probably, the density of tunnels under the roadway.…”

Section: Behavioral Ecology Of Dispersal In Amphibiansmentioning

confidence: 99%

Behavior in a Changing Landscape: Using Movement Ecology to Inform the Conservation of Pond-Breeding Amphibians

Joly

2019

Front. Ecol. Evol.

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Section: Behavioral Ecology Of Dispersal In Amphibiansmentioning

confidence: 99%

Behavior in a Changing Landscape: Using Movement Ecology to Inform the Conservation of Pond-Breeding Amphibians

Joly

2019

Front. Ecol. Evol.

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“…Landscape modification threatens biodiversity worldwide (Maxwell et al 2016), altering ecological parameters of very distinct animals such as invertebrates (Macedo et al 2020), fishes (Edge et al 2017), amphibians (Hansen et al 2019), reptiles (Pulsford et al 2017), birds (Vilet et al 2020) and mammals (Grilo et al 2019). In this regard, amphibians are among the most endangered group of animals (Catenazzi 2015), yet they are very heterogeneous in their responses to landscape modification in terms of severity and spatial extent (Ficetola et al 2009;Sawatzky et al 2019). The distinct ways amphibian species deal with habitat alteration has resulted in co-occurring species having contrasting responses when exposed to the same habitat disturbances (Eigenbrod et al 2008;Ficetola et al 2009;Prado & Rossa-Feres 2014;Nowakowski et al 2016Nowakowski et al , 2018Pulsford et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The scale of effect may also vary according to the relationship between landscape and species requirements for different processes such as dispersal or reproduction (Miguet et al 2016;Sawatzky et al 2019). When a species is dependent on connections of a given habitat type for dispersal, it may respond to larger-scale effects (Ficetola et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Amount and spatial distribution of habitats influence occupancy and dispersal of frogs at multiple scales in agricultural landscape

et al. 2020

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Agriculture changes the aquatic and terrestrial habitats used by animals, affecting their responses to matrix permeability. Here, we evaluated the impacts that resulted from the replacement of native vegetation with pastures on habitat occupancy, colonisation and local extinction of two Neotropical frogs with contrasting ecological strategies, Leptodactylus bufonius and L. chaquensis. We conducted fieldwork during two reproductive seasons in 50 temporary ponds in the Brazilian Chaco. We used site occupancy models in a multi‐scale approach to identify landscape changes affecting population parameters and to determine the scale of interaction between species and the landscape. At local (10 m) and scales ≤400 m, increased pasture proportion limited the availability of bare soil required by males of L. bufonius to build mud chambers for reproduction and decreased proportion of shrublands affecting L. chaquensis occupancy. At larger spatial scales (>400 m), landscape modification limited dispersal of the smaller species L. bufonius. We found that the amount of habitat available is important in maintaining population parameters such as occupancy. However, our results highlight that the spatial distribution of habitats may also play an important role in the persistence and mobility of frogs in agricultural landscapes and that it is possible to identify a scale of effect in such anthropic landscapes. We recommend the consideration of reproductive and dispersal requirements of amphibian species, along with body size, as predictors of the spatial scale for management of populations in farmlands.

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“…However, the costsurface or permeability of other habitats in the landscape (e.g., Koen et al 2012) and the availability of habitats necessary for wildlife to meet their full lifecycle needs should also be considered (Bortoleto et al 2016;Gilby et al 2018). As an example, reclamation of wetlands should consider not only whether the surrounding landscape will contribute sufficient water to meet the wetland's water budget (Ketcheson et al 2016), but also whether it provides sufficient adjoining overwintering habitat for amphibians (e.g., Sawatzky et al 2019), riparian and swampland to support beaver (e.g., Scrafford et al 2020), roosting and nesting structures and foraging habitat for wetland-dependent birds (e.g., Anderson and Rooney 2019), and sufficient open water to support breeding waterfowl (e.g.,Holopainen et al 2014) but not to boost their predator populations (e.g., Krapu et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Assessing the potential of integrating distribution and structure of permanent open-water wetlandscapes in reclamation design: a case study of Alberta, Canada

Ridge

Robinson

Rooney

2020

Wetlands Ecol Manage

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Wetlands are multi-functional systems that provide a disproportionate number of ecosystem services given the spatial extent they occupy both nationally and globally. The ecological functioning of these wetlands is dependent on the structure of the landscape, which poses unique challenges when reclaiming wetlands in areas where resource extraction is occurring. Resource extraction mega-projects require that entire wetlandscapes be reclaimed and often involve timelines that necessitate the consideration of climate projections to create self-sustaining, naturally appearing wetlandscapes that meet policy objectives. To understand wetlandscape structure and guide reclamation planning and closure permitting evaluation, a random sample of 13,676 1-km2 landscapes were subselected to identify 1684 permanent open-water wetlandscapes. A parsimonious set of landscape metrics were applied and compared across levels of anthropogenic disturbance and across natural regions (i.e., Grassland, Parkland and Boreal). Results demonstrated that permanent open-water wetlands are relatively rare (12.3% of our total random sample) and typically occupy less than 8% of wetlandscapes when present. The majority of wetlands in the study area are less permanent and more variable in nature than the permanent open water wetlandscapes created by megaproject reclamation, which has the potential to alter the distribution and size of open-water wetlands beyond their natural occurrence. Comparison across disturbance levels and natural regions yield statistical differences among landscape structure. General wetland landscapes representing a combination of disturbance level and natural region can be created for each metric to guide reclamation design and closure planning approval.

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Landscape context is more important than wetland buffers for farmland amphibians

Cited by 27 publications

References 41 publications

Behavior in a Changing Landscape: Using Movement Ecology to Inform the Conservation of Pond-Breeding Amphibians

Behavior in a Changing Landscape: Using Movement Ecology to Inform the Conservation of Pond-Breeding Amphibians

Amount and spatial distribution of habitats influence occupancy and dispersal of frogs at multiple scales in agricultural landscape

Assessing the potential of integrating distribution and structure of permanent open-water wetlandscapes in reclamation design: a case study of Alberta, Canada

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