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Full-Text Articles in Life Sciences
Effectiveness And Utility Of Acoustic Recordings For Surveying Tropical Birds, Antonio Celis-Murillo, Jill L. Deppe, Michael P. Ward
Effectiveness And Utility Of Acoustic Recordings For Surveying Tropical Birds, Antonio Celis-Murillo, Jill L. Deppe, Michael P. Ward
Jill L Deppe
Although acoustic recordings have recently gained popularity as an alternative to point counts for surveying birds, little is known about the relative performance of the two methods for detecting tropical bird species across multiple vegetation types. During June and July 2008, we collected species detection/nondetection data to compare the performance of a quadraphonic acoustic recording system and point counts for estimating species richness and composition and detection probabilities of 15 rare, moderately common, and common tropical bird species across six structurally distinct vegetation types (coastal dune scrub, mangrove, low-stature deciduous thorn forest, early and late successional medium-stature semievergreen forest, and …
Simulating The Effects Of Wetland Loss And Inter-Annual Variability On The Fitness Of Migratory Bird Species, Jill L. Deppe, James A. Smith
Simulating The Effects Of Wetland Loss And Inter-Annual Variability On The Fitness Of Migratory Bird Species, Jill L. Deppe, James A. Smith
Jill L Deppe
Long-distance migratory shorebirds require wetland stopover sites where they can forage and deposit sufficient fat to complete their migration and, in the spring, reproduce. Conservation biologists are concerned that continental-scale reductions in wetland availability and quality due to human disturbance, climate change, and natural drought events are negatively impacting these species by eliminating critical stopovers along migratory flyways. We describe an individual-based migration model driven by remotely sensed land surface data, climate data assimilation models, and biological field data to examine the impact of changing environmental conditions on migration routes, temporal patterns, and fitness. We used an evolutionary programming approach …
Alaska At The Crossroads Of Migration: Space-Based Ornithology, Jill L. Deppe, K Wessels, J A. Smith
Alaska At The Crossroads Of Migration: Space-Based Ornithology, Jill L. Deppe, K Wessels, J A. Smith
Jill L Deppe
Understanding bird migration on a global scale is one of the most compelling and challenging problems of modern biology. Each year multitudes of migratory birds travel between breeding grounds in Alaska and wintering grounds in the Americas, Asia, and Australia. Here we present the conceptual framework for a spatially explicit, individual-based biophysical migration model driven by dynamic remote sensing observations of atmospheric and land surface conditions to simulate migration routes, timing, energy budgets, and probability of survival. Understanding temporal and spatial patterns of bird migration will provide insight into pressing conservation and human health issues related to this taxonomic group.
Temporal Patterns In Fall Migrant Communities In Yucatan, Mexico, Jill L. Deppe, John T. Rotenberry
Temporal Patterns In Fall Migrant Communities In Yucatan, Mexico, Jill L. Deppe, John T. Rotenberry
Jill L Deppe
We quantified temporal turnover in the composition of fall migrant landbird communities along the northern coast of the Yucatan Peninsula using Detrended Correspondence Analysis. The presence of winter residents of many migrant species at the site prevented turnover from being complete. However, early and late season transient communities shared few, if any, species in common. Point-count surveys showed greater compositional change than net surveys that included winter residents. The rate of species turnover was generally slow until the middle of the season, when it reached a maximum, and decreased again toward the end of the season as species composition began …