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Variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird

Identifying environmental correlates driving space-use strategies can be critical for predicting population dynamics; however, such information can be difficult to attain for small mobile species such as migratory songbirds. We combined radio-telemetry and high-resolution GPS tracking to examine spa...

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Autores principales: Stanley, Calandra Q., Dudash, Michele R., Ryder, Thomas B., Gregory Shriver, W., Marra, Peter P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8292764/
https://www.ncbi.nlm.nih.gov/pubmed/34284621
http://dx.doi.org/10.1098/rspb.2021.1220
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author Stanley, Calandra Q.
Dudash, Michele R.
Ryder, Thomas B.
Gregory Shriver, W.
Marra, Peter P.
author_facet Stanley, Calandra Q.
Dudash, Michele R.
Ryder, Thomas B.
Gregory Shriver, W.
Marra, Peter P.
author_sort Stanley, Calandra Q.
collection PubMed
description Identifying environmental correlates driving space-use strategies can be critical for predicting population dynamics; however, such information can be difficult to attain for small mobile species such as migratory songbirds. We combined radio-telemetry and high-resolution GPS tracking to examine space-use strategies under different moisture gradients for wood thrush (Hylocichla mustelina). We explored the role moisture plays in driving food abundance and, in turn, space-use strategies at a wintering site in Belize across 3 years. Individuals occupying drier habitats experienced lower food abundance and poorer body condition. Using data from our radio-tracked study population and GPS tracking from across five breeding populations, we detected low rates of overwinter site persistence across the wood thrush wintering range. Contrary to expectations, individuals in wetter habitats were more likely to engage in permanent mid-winter relocations, up to 148 km. We suggest facultative movements are instead a condition-dependent strategy that enables wintering wood thrush to locate alternative habitat as food availability declines throughout the dry season. Increased aridity is predicted across the wintering range of wood thrush, and future research should delve deeper into understanding how moisture impacts within and between season space-use dynamics and its ultimate impact on the population dynamics of this declining species.
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spelling pubmed-82927642021-07-31 Variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird Stanley, Calandra Q. Dudash, Michele R. Ryder, Thomas B. Gregory Shriver, W. Marra, Peter P. Proc Biol Sci Ecology Identifying environmental correlates driving space-use strategies can be critical for predicting population dynamics; however, such information can be difficult to attain for small mobile species such as migratory songbirds. We combined radio-telemetry and high-resolution GPS tracking to examine space-use strategies under different moisture gradients for wood thrush (Hylocichla mustelina). We explored the role moisture plays in driving food abundance and, in turn, space-use strategies at a wintering site in Belize across 3 years. Individuals occupying drier habitats experienced lower food abundance and poorer body condition. Using data from our radio-tracked study population and GPS tracking from across five breeding populations, we detected low rates of overwinter site persistence across the wood thrush wintering range. Contrary to expectations, individuals in wetter habitats were more likely to engage in permanent mid-winter relocations, up to 148 km. We suggest facultative movements are instead a condition-dependent strategy that enables wintering wood thrush to locate alternative habitat as food availability declines throughout the dry season. Increased aridity is predicted across the wintering range of wood thrush, and future research should delve deeper into understanding how moisture impacts within and between season space-use dynamics and its ultimate impact on the population dynamics of this declining species. The Royal Society 2021-07-28 2021-07-21 /pmc/articles/PMC8292764/ /pubmed/34284621 http://dx.doi.org/10.1098/rspb.2021.1220 Text en © 2021 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited.
spellingShingle Ecology
Stanley, Calandra Q.
Dudash, Michele R.
Ryder, Thomas B.
Gregory Shriver, W.
Marra, Peter P.
Variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird
title Variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird
title_full Variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird
title_fullStr Variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird
title_full_unstemmed Variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird
title_short Variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird
title_sort variable tropical moisture and food availability underlie mixed winter space-use strategies in a migratory songbird
topic Ecology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8292764/
https://www.ncbi.nlm.nih.gov/pubmed/34284621
http://dx.doi.org/10.1098/rspb.2021.1220
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