Effects of habitat loss and fragmentation on the abundance and species richness of aphidophagous beetles and aphids in experimental alfalfa landscapes

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dc.contributor.authorGrez, Audrey A.
dc.contributor.authorZaviezo, Tania
dc.contributor.authorDiaz, Sandra
dc.contributor.authorCamousseigt, Bernardino
dc.contributor.authorCortés Hinojosa, Galaxia Andrea
dc.date.accessioned2024-01-10T13:12:36Z
dc.date.available2024-01-10T13:12:36Z
dc.date.issued2008
dc.description.abstractIn agro-ecosystems, habitat loss and fragmentation may alter the assemblage of aphidophagous insects, Such as foliar-foraging (coccinellids) and ground-foraging predators (carabids), potentially affecting intraguild interactions. We evaluated how habitat loss (0, 55 and 84%), fragmentation (1, 4 and 16 fragments) and their combination affected the abundance and species richness of coccinellids and carabids, and aphid abundance, both in the short-term (summer: December to February) and over a longer time span (autumn: March to May), when different demographic mechanisms may participate. We created four types of 30 x 30 in patches (landscapes) in which alfalfa was grown: Control (IF - 0%, 30 x 30 ill patch of alfalfa with no fragmentation or habitat loss), 4F - 55% (4 alfalfa fragments, with 55% total habitat loss), 4F - 84% (4 alfalfa fragments, with 84% total habitat loss), and 16F - 84% (16 alfalfa fragments, with 84% total habitat loss). Each landscape type was replicated five times. Insects were sampled by sweep-netting and pitfall traps, from December (summer) to May (autumn). Total abundance and species richness of carabids, in the short-term, was highest in the 1 6F - 84% landscapes. Total abundance of adult coccinellids was similar among landscapes, but at the species level Hyperaspis sphaeridioides, in the short-term, and Adalia bipunctata, in the long-term, had their highest densities in fragments within landscapes with high habitat loss (84%), independently of habitat fragmentation. Species richness in the long-term was higher in the landscapes with 84% habitat loss. Among aphids, in the long term Aphis craccivora was less abundant in landscapes with high habitat loss and fragmentation (16-84%), while Therioaphis trifolii showed the opposite trend. These results suggest that habitat loss and fragmentation may increase the density and diversity of aphidophagous insects, while their effects oil aphids are more variable.
dc.description.funderFONDECYT
dc.format.extent10 páginas
dc.fuente.origenWOS
dc.identifier.doi10.14411/eje.2008.052
dc.identifier.eissn1802-8829
dc.identifier.urihttps://doi.org/10.14411/eje.2008.052
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78208
dc.identifier.wosidWOS:000258546900006
dc.information.autorucFacultad de agronomía e ingeniería forestal ; Zaviezo T ; S/I ; 62543
dc.information.autorucMedicina veterinaria ; Cortés Hinojosa, Galaxia Andrea ; S/I ; 1120040
dc.issue.numero3
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final420
dc.pagina.inicio411
dc.publisherCZECH ACAD SCI, INST ENTOMOLOGY
dc.revistaEUROPEAN JOURNAL OF ENTOMOLOGY
dc.rightsregistro bibliográfico
dc.subjectHabitat fragmentation
dc.subjectHabitat loss
dc.subjectExperimental landscapes
dc.subjectCoccinellids
dc.subjectCarabids
dc.subjectAphids
dc.subjectAlfalfa
dc.subjectBIOLOGICAL-CONTROL
dc.subjectPOPULATION-DENSITY
dc.subjectSCALE
dc.subjectCOCCINELLIDAE
dc.subjectARTHROPODS
dc.subjectCOLEOPTERA
dc.subjectPREDATORS
dc.subjectDISPERSAL
dc.subjectBEHAVIOR
dc.subjectECOLOGY
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.titleEffects of habitat loss and fragmentation on the abundance and species richness of aphidophagous beetles and aphids in experimental alfalfa landscapes
dc.typeartículo
dc.volumen105
sipa.codpersvinculados62543
sipa.codpersvinculados1120040
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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