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Robustness of plant-flower visitor webs to simulated climate change Ecología austral
Devoto,Mariano; Zimmermann,Martín; Medan,Diego.
Climate change threatens the integrity of pollination webs by decoupling plants and flower visitors both phenologically and ecologically. We simulated a range shift of flower-visitor species along a steep east-west rainfall gradient to explore resulting patterns of extinction. The systems studied seemed to be rather robust to range shifts. This results from (a) the positive correlation between the geographic range and both the local (i.e. at each site) and the regional (i.e. pooling across sites) number of interaction partners of the plants and flower visitors of these webs, and (b) a nested assembly of interactions at the regional level. In a broader context, this study reveals itself as a useful tool for understanding the links between the interaction...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mutualism disruption; Plant-pollinator interaction; Patagonia; Global change; Extinction; Nestedness.
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2007000100004
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Urbanization Drives a Reduction in Functional Diversity in a Guild of Nectar-feeding Birds Ecology and Society
Pauw, Anton ; Stellenbosch University; apauw@sun.ac.za; Louw, Kirsten; Published posthumously;.
Urbanization is a widespread and rapidly growing threat to biodiversity, therefore we need a predictive understanding of its effects on species and ecosystem processes. In this paper we study the impact of urbanization on a guild of nectar-feeding birds in a biodiversity hotspot at the Cape of Africa. The guild of four bird species provides important ecosystem services by pollinating 320 plant species in the Cape Floral Region. Functional diversity within the guild is related to differences in bill length. The long-billed Malachite Sunbird (Nectarinia famosa) plays an irreplaceable role as the exclusive pollinator of plant species with long nectar tubes. We analyzed the composition of the guild in suburban gardens of Cape Town along a gradient of...
Tipo: Peer-Reviewed Reports Palavras-chave: Bird pollination; Citizen science; Ecosystem services; Hummingbird feeders; Mobile link organism; Mutualism disruption; Nectarivore; Resilience; Urban ecology; Urban planning.
Ano: 2012
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