Population Trends of Colonial Waterbirds in Other Northeast Bays
Understanding the spatial and temporal differences in population levels of colonial species nesting in Barnegat Bay provides local data for a bay that is more than 60 km long. However, it is also useful to examine whether the trends evident in Barnegat Bay are local or regional, and the extent to which species differ in their population trends in other Northeast bays. Since populations, by definition, are circumscribed by scientists (e.g., birds of Barnegat Bay, birds of New Jersey, birds of the Northeast), it is often difficult to determine and define the deme (members of the species that are potentially interbreeding), and the extent of exchange among colonies or populations that constitute a metapopulation (Spendelow et al. 1995).