Influence of point count length and repeated visits on habitat model performance

Article Abstract:

Point counts are a method for assessing bird populations and bird-habitat relations. There has been research on how the time span of counts is related to their accuracy, but the way that count duration changes affects models of bird habitats constructed from point count data has tended to be ignored. Longer point counts can bring some improvements in accuracy, though these improvements may not be worth the extra eefort. Multiple visits gave greater accuracy than single visits, and two visits are recommended. Point count durations of between 5 mins and 10 mins appear adequate.

Analysis, Wildlife management, Ornithological research, Statistical sampling, Sampling (Statistics)

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Predicting cerulean warbler habitat use in the Cumberland Mountains of Tennessee

Article Abstract:

The potential coal mining effects on cerulean habitat and abundance is analyzed with spatial data on coal reserves by conducting an assessment for ceruleans in the Cumberland Mountains of eastern Tennessee, the largest documented population range-wide for this species. Results suggest that landscape characteristics are important in defining cerulean habitat suitability apart from cumulative effects of coal mining, timber harvest, and human development, and coal mining may displace 23% of the population.

Science & research, Environmental aspects, Coal mining, Population density, Habitat selection, Old World warblers

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Forest management alternatives and songbird breeding habitat on the Cherokee national forest, Tennessee

Article Abstract:

Habitat models for the 6 bird species were applied to the updated stand inventory and available habitat quantified for each decade. Models suggested that anthropogenic disturbance and lack thereof could play a definite role determining habitat availability and population viability for forest songbirds.

Models, Behavior, Study and teaching, Habitat (Ecology), Protection and preservation, Habitats, Songbirds

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