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Abstract:

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.

Registro:

Documento: Artículo
Título:Quantifying edge effects: The role of habitat contrast and species specialization
Autor:Peyras, M.; Vespa, N.I.; Bellocq, M.I.; Zurita, G.A.
Filiación:CONICET, Departamento de Ecología, Genética y Evolución, FCEN, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, Piso 4, C1428EHA Buenos Aires, Argentina
CONICET, Facultad de Ciencias Forestales, Instituto de Biología Subtropical, Universidad Nacional de Misiones, Andresito 21, 3370 Puerto Iguazú, Misiones, Argentina
Palabras clave: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
Año:2013
Volumen:17
Número:4
Página de inicio:807
Página de fin:820
DOI: http://dx.doi.org/10.1007/s10841-013-9563-y
Título revista:Journal of Insect Conservation
Título revista abreviado:J. Insect Conserv.
ISSN:1366638X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1366638X_v17_n4_p807_Peyras

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Citas:

---------- APA ----------
Peyras, M., Vespa, N.I., Bellocq, M.I. & Zurita, G.A. (2013) . Quantifying edge effects: The role of habitat contrast and species specialization. Journal of Insect Conservation, 17(4), 807-820.
http://dx.doi.org/10.1007/s10841-013-9563-y
---------- CHICAGO ----------
Peyras, M., Vespa, N.I., Bellocq, M.I., Zurita, G.A. "Quantifying edge effects: The role of habitat contrast and species specialization" . Journal of Insect Conservation 17, no. 4 (2013) : 807-820.
http://dx.doi.org/10.1007/s10841-013-9563-y
---------- MLA ----------
Peyras, M., Vespa, N.I., Bellocq, M.I., Zurita, G.A. "Quantifying edge effects: The role of habitat contrast and species specialization" . Journal of Insect Conservation, vol. 17, no. 4, 2013, pp. 807-820.
http://dx.doi.org/10.1007/s10841-013-9563-y
---------- VANCOUVER ----------
Peyras, M., Vespa, N.I., Bellocq, M.I., Zurita, G.A. Quantifying edge effects: The role of habitat contrast and species specialization. J. Insect Conserv. 2013;17(4):807-820.
http://dx.doi.org/10.1007/s10841-013-9563-y