A metapopulation is any set of populations that are patchily distributed and potentially connected by dispersal. This broad definition includes classical, mainland-island, source-sink, patchy and non-equilibrium metapopulations. To ensure long-term regional population viability in a fragmented landscape we need a better understanding of metapopulation dynamics. To determine which metapopulation model applies to a given species, Stith et al. (1996) developed a classification scheme using species-specific estimates of dispersal distance and local extinction risk. We used this scheme to classify bobolink (Dolichonyx oryzivorus) populations occupying fragmented, agricultural grasslands in the Midwestern United States. We estimated the distribution of dispersal distances using mark-recapture techniques and calculated local extinction risk. Dispersal rate and turnover were high, indicating that populations were highly connected. Local extinction probability was 4%, indicating that populations were “midlands” and vulnerable to extinction. Well-connected populations constitute a patchy metapopulation according to Stith et al.'s (1996) scheme. Bobolink dispersal ability was sufficient to overcome habitat fragmentation. Our research showed that the Stith et al. (1996) classification can be applied to a migratory species, but should be expanded to the metalandscape scale.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.