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| Roubik, David Ward; Smithsonian Tropical Research Institute; roubikd@tivoli.si.edu. |
| Plant-pollinator systems inherently possess wide variation that limits the applicability of surveys on population dynamics or diversity. Stable habitats are scarcely studied, whereas dynamics in unprotected habitats are less predictable or more compromised by exotic organisms (Apis, in the case of bee surveys). An extensively replicated, long-term study of orchid-bees (Euglossini) was made in protected tropical moist forest in Panama. Over 47,000 bees were recorded in 124 monthly censuses employing 1952 counts. No aggregate trend in abundance occurred (from 1979 to 2000), although four individual species declined, nine increased, 23 showed no change, and species richness was stable. No rare or parasitic species showed decreasing trends, while the most... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: ENSO; Euglossini; Abundance variability; Bees; Census techniques; Diversity; Pollinators; Trends; Tropical- temperate comparisons. |
| Ano: 2001 |
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| Merenlender, Adina; University of California, Berkeley; adina@nature.berkeley.edu; Kremen, Claire; Center for Conservation Biology and Wildlife Conservation Society; ckremen@leland.Stanford.EDU; Rakotondratsima, Marius; Wildlife Conservation Society, Madagascar; mphrl@ukc.ac.uk; Weiss, Andrew; Center for Conservation Biology; aweiss@bing.stanford.edu. |
| Monitoring the influence of human actions on flagship species is an important part of conserving biodiversity, because the information gained is crucial for the development and adaptation of conservation management plans. On the Masoala Peninsula in Madagascar, we are monitoring the two largest prosimian species, Eulemur fulvus albifrons and Varecia variegata rubra, at disturbed and undisturbed forest sites to determine if extraction of forest resources has a significant impact on the population viability of these species. To test the sensitivity of lemur species to routine extraction of natural resources by local villagers, we compared population demography and density for both species across six study sites, using a new census technique. Three of the... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Biodiversity; Buffer zone; Census techniques; Conservation; Eulemur fulvus albifrons; GIS; Lemurs; Madagascar; National park; Natural resource extraction; Primate; Protected area management; Varecia variegata rubra. |
| Ano: 1998 |
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