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Data from: Habitat-dependent occupancy and movement in a migrant songbird highlights the importance of mangroves and forested lagoons in Panama and Colombia

Citation

Bulluck, Lesley et al. (2020), Data from: Habitat-dependent occupancy and movement in a migrant songbird highlights the importance of mangroves and forested lagoons in Panama and Colombia, Dryad, Dataset, https://doi.org/10.5061/dryad.8m63m78

Abstract

Climate change is predicted to impact tropical mangrove forests due to decreased rainfall, sea-level rise, and increased seasonality of flooding. Such changes are likely to influence habitat quality for migratory songbirds occupying mangrove wetlands during the tropical dry season. Overwintering habitat quality is known to be associated with fitness in migratory songbirds, yet studies have focused primarily on territorial species. Little is known about the ecology of non-territorial species that may display more complex movement patterns within and among habitats of differing quality. In this study, we assess within season survival and movement at two spatio-temporal scales of a non-territorial overwintering bird, the prothonotary warbler (Protonotaria citrea), that depends on mangroves and tropical lowland forests. Specifically, we (1) estimated within-patch survival and persistence over a six-week period using radio-tagged birds in central Panama and (2) modelled abundance and occupancy dynamics at survey points throughout eastern Panama and northern Colombia as the dry season progressed. We found that site persistence was highest in mangroves; however, the probability of survival did not differ among habitats. The probability of warbler occupancy increased with canopy cover, and wet habitats were least likely to experience local extinction as the dry season progressed. We also found that warbler abundance is highest in forests with the tallest canopies. This study is one of the first to demonstrate habitat-dependent occupancy and movement in a non-territorial overwintering migrant songbird, and our findings highlight the need to conserve intact, mature mangrove and lowland forests.

Usage Notes

Location

Colombia
Panama