Short-term effects of habitat fragmentation on the abundance and species richness of beetles in experimental alfalfa microlandscapes

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dc.contributor.authorGrez, AA
dc.contributor.authorZaviezo, T
dc.contributor.authorReyes, S
dc.date.accessioned2024-01-10T14:21:38Z
dc.date.available2024-01-10T14:21:38Z
dc.date.issued2004
dc.description.abstractHabitat loss and fragmentation are considered as the main causes of biodiversity depression. Habitat loss implies a reduction of suitable habitat for organisms, and habitat fragmentation is a change in the spatial configuration of the landscape, with the remaining fragments resulting more or less isolated. Recent theory indicates that the effects of habitat loss are more important than those of habitat fragmentation, however there are few experimental studies evaluating both processes separately. To test the effects of habitat fragmentation per se on the abundance, species richness and diversity of epigeal coleopterans, 15 (30 x 30 m) alfalfa microlandscapes, distributed in three blocks, were created. On twelve of them, 84 % of the habitat was removed, leaving in each landscape four or 16 fragments separated by 2 or 6 m of bare ground. From December 2002 to April 2003, before and after fragmentation, coleopterans were sampled using pitfall traps. In total, 8,074 coleopterans of 75 species belonging to 16 families were captured. Neither habitat fragmentation nor habitat loss affected the total abundance of coleopterans, with the exception of Anthicidae that was more abundant in the microlandscapes composed by four fragments separated by 2 m. This family was also more abundant in the matrix of fragmented microlandscapes, while most other beetle families were more abundant in the fragments, significantly Carabidae and Lathridiidae. Species richness (per trap and per landscape) was higher in microlandscapes with 16 fragments separated by 6 m. Contrary to what is described frequently in the literature, habitat fragmentation did not negatively affect the abundance or the species richness of epigeal coleopterans. Rather, smaller and more isolated alfalfa fragments seem to provide habitat to support greater biodiversity. These results agree with more recent findings where habitat fragmentation per se seems not to have deleterious effects on the fauna, instead, it could favor the biota, at least at short time scales.
dc.format.extent12 páginas
dc.fuente.origenWOS
dc.identifier.eissn0717-6317
dc.identifier.issn0716-078X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79738
dc.identifier.wosidWOS:000224114200013
dc.information.autorucAgronomía e Ing. Forestal;Zaviezo T;S/I;62543
dc.issue.numero3
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final558
dc.pagina.inicio547
dc.publisherSOC BIOLGIA CHILE
dc.revistaREVISTA CHILENA DE HISTORIA NATURAL
dc.rightsregistro bibliográfico
dc.subjecthabitat fragmentation
dc.subjecthabitat loss
dc.subjectmicrolandscapes
dc.subjectdiversity of epigeal beetles
dc.subjectLANDSCAPE STRUCTURE
dc.subjectCOMMUNITIES
dc.subjectBIODIVERSITY
dc.subjectINSECTS
dc.subjectDENSITY
dc.subjectBIRDS
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleShort-term effects of habitat fragmentation on the abundance and species richness of beetles in experimental alfalfa microlandscapes
dc.typeartículo
dc.volumen77
sipa.codpersvinculados62543
sipa.indexWOS
sipa.indexScielo
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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