Local Extinction of Dragonfly and Damselfly Populations in Low‐ and High‐Quality Habitat Patches |
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| Authors: | JUKKA SUHONEN MILLA HILLI‐LUKKARINEN ESA KORKEAMÄKI MARKKU KUITUNEN JOHANNA KULLAS JOUNI PENTTINEN JUKKA SALMELA |
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| Institution: | 1. Department of Biological and Environmental Science, P.O. Box 35, FI‐40014, University of Jyv?skyl?, Finland;2. Current address: Section of Ecology, Department of Biology, University of Turku, FI‐20014 Turku, Finland, email;3. Current address: Environmental Protection Department, City of Tampere, P.O. Box 487, FI‐33101 Tampere, Finland;4. Current address: Finnish Forest and Park Service, Sapokankatu 2, FI‐48100 Kotka, Finland;5. Current address: West Finland Regional Environment Centre, Research and Nature Conservation, P.O. Box 262, FI‐65101 Vaasa, Finland |
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| Abstract: | Abstract: Understanding the risk of extinction of a single population is an important problem in both theoretical and applied ecology. Local extinction risk depends on several factors, including population size, demographic or environmental stochasticity, natural catastrophe, or the loss of genetic diversity. The probability of local extinction may also be higher in low‐quality sink habitats than in high‐quality source habitats. We tested this hypothesis by comparing local extinction rates of 15 species of Odonata (dragonflies and damselflies) between 1930–1975 and 1995–2003 in central Finland. Local extinction rates were higher in low‐quality than in high‐quality habitats. Nevertheless, for the three most common species there were no differences in extinction rates between low‐ and high‐quality habitats. Our results suggest that a good understanding of habitat quality is crucial for the conservation of species in heterogeneous landscapes. |
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| Keywords: | damselfly dragonfly extinction Finland habitat quality Odonata source– sink calidad de há bitat extinció n Finlandia fuente‐vertedero libé lula Odonata |
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