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Both population size and patch quality affect local extinctions and colonizations.

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Author

Summary, in English

Currently, the habitat of many species is fragmented, resulting in small local populations with individuals occasionally dispersing between the remaining habitat patches. In a solitary bee metapopulation, extinction probability was related to both local bee population sizes and pollen resources measured as host plant population size. Patch size, on the other hand, had no additional predictive power. The turnover rate of local bee populations in 63 habitat patches over 4 years was high, with 72 extinction events and 31 colonization events, but the pollen plant population was stable with no extinctions or colonizations. Both pollen resources and bee populations had strong and independent effects on extinction probability, but connectivity was not of importance. Colonizations occurred more frequently within larger host plant populations. For metapopulation survival of the bee, large pollen plant populations are essential, independent of current bee population size.

Department/s

Publishing year

2010

Language

English

Pages

79-85

Publication/Series

Royal Society of London. Proceedings B. Biological Sciences

Volume

277

Document type

Journal article

Publisher

Royal Society Publishing

Topic

  • Ecology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1471-2954