Quantifying edge effects: The role of habitat contrast and species specialization
Edge effect is a key process influencing populations and communities, particularly in fragmented landscapes. A general analytical framework has been proposed to quantify the strength of the edge effects (extent and magnitude); however, factors determining the later remain poorly explored. Using a co...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1366638X_v17_n4_p807_Peyras http://hdl.handle.net/20.500.12110/paper_1366638X_v17_n4_p807_Peyras |
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paper:paper_1366638X_v17_n4_p807_Peyras2023-06-08T16:12:01Z Quantifying edge effects: The role of habitat contrast and species specialization Peyras, Marina Natalia Vespa, Natalia Isabel Bellocq, Maria Isabel Zurita, Gustavo Andrés Atlantic forest Dung beetles Edge effect Quantitative response Sigmoid response Unimodal response abundance beetle ecotone edge effect forest cover functional group microclimate preference behavior quantitative analysis specialist specialization Argentina Coleoptera Edge effect is a key process influencing populations and communities, particularly in fragmented landscapes. A general analytical framework has been proposed to quantify the strength of the edge effects (extent and magnitude); however, factors determining the later remain poorly explored. Using a continuous approach we explore the response of dung beetle species and assemblages to ecotones which differ in environmental dissimilarity in the Southern Atlantic forest of Argentina. Using baited pitfall traps and automatic sensors, we estimated dung beetle abundance, microclimatic conditions and vegetation structure along five different forest-plantations transects. At the assemblages level, the majority of species showed either edge avoidance or preference; however, the response depended on the environmental dissimilarity between habitats (plantation and native forest) and varied from a neutral response on mature plantations (low contrast ecotone) to edge avoidance on recent ones (high contrast ecotone). At the species level, the degree of habitat specialization explains the differential response of species to edge effects; more specialized species showed stronger edge response while generalist species showed softer or neutral responses. Environmental dissimilarity between confronted habitats and species specialization explain the quantitative component of edge effects on species and assemblages. Functional groups (rollers and tunnellers) often showed opposite responses to edge effects. At the landscape level, functional connectivity of forest fragments is probably drastically reduced by high contrasts matrices (such as recent plantations) for native forest species, whereas soft ecotones (such as native forest-mature plantations) maintained functional connectivity. These results are particularly relevant on highly fragmented landscapes, such as the Atlantic forest, where edge effect is probably one the most important mechanisms affecting native species and communities. © 2013 Springer Science+Business Media Dordrecht. Fil:Peyras, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vespa, N.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bellocq, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zurita, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1366638X_v17_n4_p807_Peyras http://hdl.handle.net/20.500.12110/paper_1366638X_v17_n4_p807_Peyras |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Atlantic forest Dung beetles Edge effect Quantitative response Sigmoid response Unimodal response abundance beetle ecotone edge effect forest cover functional group microclimate preference behavior quantitative analysis specialist specialization Argentina Coleoptera |
| spellingShingle |
Atlantic forest Dung beetles Edge effect Quantitative response Sigmoid response Unimodal response abundance beetle ecotone edge effect forest cover functional group microclimate preference behavior quantitative analysis specialist specialization Argentina Coleoptera Peyras, Marina Natalia Vespa, Natalia Isabel Bellocq, Maria Isabel Zurita, Gustavo Andrés Quantifying edge effects: The role of habitat contrast and species specialization |
| topic_facet |
Atlantic forest Dung beetles Edge effect Quantitative response Sigmoid response Unimodal response abundance beetle ecotone edge effect forest cover functional group microclimate preference behavior quantitative analysis specialist specialization Argentina Coleoptera |
| description |
Edge effect is a key process influencing populations and communities, particularly in fragmented landscapes. A general analytical framework has been proposed to quantify the strength of the edge effects (extent and magnitude); however, factors determining the later remain poorly explored. Using a continuous approach we explore the response of dung beetle species and assemblages to ecotones which differ in environmental dissimilarity in the Southern Atlantic forest of Argentina. Using baited pitfall traps and automatic sensors, we estimated dung beetle abundance, microclimatic conditions and vegetation structure along five different forest-plantations transects. At the assemblages level, the majority of species showed either edge avoidance or preference; however, the response depended on the environmental dissimilarity between habitats (plantation and native forest) and varied from a neutral response on mature plantations (low contrast ecotone) to edge avoidance on recent ones (high contrast ecotone). At the species level, the degree of habitat specialization explains the differential response of species to edge effects; more specialized species showed stronger edge response while generalist species showed softer or neutral responses. Environmental dissimilarity between confronted habitats and species specialization explain the quantitative component of edge effects on species and assemblages. Functional groups (rollers and tunnellers) often showed opposite responses to edge effects. At the landscape level, functional connectivity of forest fragments is probably drastically reduced by high contrasts matrices (such as recent plantations) for native forest species, whereas soft ecotones (such as native forest-mature plantations) maintained functional connectivity. These results are particularly relevant on highly fragmented landscapes, such as the Atlantic forest, where edge effect is probably one the most important mechanisms affecting native species and communities. © 2013 Springer Science+Business Media Dordrecht. |
| author |
Peyras, Marina Natalia Vespa, Natalia Isabel Bellocq, Maria Isabel Zurita, Gustavo Andrés |
| author_facet |
Peyras, Marina Natalia Vespa, Natalia Isabel Bellocq, Maria Isabel Zurita, Gustavo Andrés |
| author_sort |
Peyras, Marina Natalia |
| title |
Quantifying edge effects: The role of habitat contrast and species specialization |
| title_short |
Quantifying edge effects: The role of habitat contrast and species specialization |
| title_full |
Quantifying edge effects: The role of habitat contrast and species specialization |
| title_fullStr |
Quantifying edge effects: The role of habitat contrast and species specialization |
| title_full_unstemmed |
Quantifying edge effects: The role of habitat contrast and species specialization |
| title_sort |
quantifying edge effects: the role of habitat contrast and species specialization |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1366638X_v17_n4_p807_Peyras http://hdl.handle.net/20.500.12110/paper_1366638X_v17_n4_p807_Peyras |
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AT peyrasmarinanatalia quantifyingedgeeffectstheroleofhabitatcontrastandspeciesspecialization AT vespanataliaisabel quantifyingedgeeffectstheroleofhabitatcontrastandspeciesspecialization AT bellocqmariaisabel quantifyingedgeeffectstheroleofhabitatcontrastandspeciesspecialization AT zuritagustavoandres quantifyingedgeeffectstheroleofhabitatcontrastandspeciesspecialization |
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