When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird
Organisms tend to exhibit phenotypes that can be shaped by climate, commonly demonstrating clinal variations along latitudinal gradients. In vertebrates, air temperature plays a major role in shaping body size in both ectothermic and endothermic animals. However, additional small‐scale environmental...
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crwiley:10.1111/ecog.02209 2024-06-09T07:49:34+00:00 When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird Nunes, Guilherme Tavares Mancini, Patrícia Luciano Bugoni, Leandro 2016 http://dx.doi.org/10.1111/ecog.02209 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fecog.02209 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ecog.02209 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecography volume 40, issue 3, page 365-375 ISSN 0906-7590 1600-0587 journal-article 2016 crwiley https://doi.org/10.1111/ecog.02209 2024-05-16T14:22:17Z Organisms tend to exhibit phenotypes that can be shaped by climate, commonly demonstrating clinal variations along latitudinal gradients. In vertebrates, air temperature plays a major role in shaping body size in both ectothermic and endothermic animals. However, additional small‐scale environmental factors can also act as selection pressures in the marine ecosystem (e.g. primary productivity), evidencing multi‐scale processes acting on marine organisms. In this study, we tested Bergmann's rule in a widely distributed seabird, the brown booby Sula leucogaster , in addition to evaluating the relationship of sea surface temperature and chlorophyll α with phenotypes. We used traits from a morphometric dataset (culmen, wing chord, and tarsus length) and body mass of 276 brown boobies distributed on six breeding sites along a latitudinal gradient in the South Atlantic Ocean (0–27°S). We found significant differentiation among colonies, but phenotypic similarities were observed between colonies located at the extremes of the latitudinal gradient. As the colony nearest to the Equator, Saint Peter and Saint Paul archipelago, had the largest and heaviest individuals, the model containing only air temperature explained < 5% of the allometric variation, providing no substantial support for Bergmann's rule. However, when we added the interaction of chlorophyll α and sea surface temperature the deviance explained rose to over 80%. Primary productivity and sea surface temperature do not follow a latitudinal gradient in the ocean and, therefore, the role of small‐scale oceanographic processes in shaping body size and the importance of considering additional environmental variables when testing Bergmann's rule in marine organisms are evident. Article in Journal/Newspaper South Atlantic Ocean Wiley Online Library Saint-Paul ENVELOPE(-57.715,-57.715,51.467,51.467) Ecography 40 3 365 375 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Organisms tend to exhibit phenotypes that can be shaped by climate, commonly demonstrating clinal variations along latitudinal gradients. In vertebrates, air temperature plays a major role in shaping body size in both ectothermic and endothermic animals. However, additional small‐scale environmental factors can also act as selection pressures in the marine ecosystem (e.g. primary productivity), evidencing multi‐scale processes acting on marine organisms. In this study, we tested Bergmann's rule in a widely distributed seabird, the brown booby Sula leucogaster , in addition to evaluating the relationship of sea surface temperature and chlorophyll α with phenotypes. We used traits from a morphometric dataset (culmen, wing chord, and tarsus length) and body mass of 276 brown boobies distributed on six breeding sites along a latitudinal gradient in the South Atlantic Ocean (0–27°S). We found significant differentiation among colonies, but phenotypic similarities were observed between colonies located at the extremes of the latitudinal gradient. As the colony nearest to the Equator, Saint Peter and Saint Paul archipelago, had the largest and heaviest individuals, the model containing only air temperature explained < 5% of the allometric variation, providing no substantial support for Bergmann's rule. However, when we added the interaction of chlorophyll α and sea surface temperature the deviance explained rose to over 80%. Primary productivity and sea surface temperature do not follow a latitudinal gradient in the ocean and, therefore, the role of small‐scale oceanographic processes in shaping body size and the importance of considering additional environmental variables when testing Bergmann's rule in marine organisms are evident. |
format |
Article in Journal/Newspaper |
author |
Nunes, Guilherme Tavares Mancini, Patrícia Luciano Bugoni, Leandro |
spellingShingle |
Nunes, Guilherme Tavares Mancini, Patrícia Luciano Bugoni, Leandro When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird |
author_facet |
Nunes, Guilherme Tavares Mancini, Patrícia Luciano Bugoni, Leandro |
author_sort |
Nunes, Guilherme Tavares |
title |
When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird |
title_short |
When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird |
title_full |
When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird |
title_fullStr |
When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird |
title_full_unstemmed |
When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird |
title_sort |
when bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/ecog.02209 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fecog.02209 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ecog.02209 |
long_lat |
ENVELOPE(-57.715,-57.715,51.467,51.467) |
geographic |
Saint-Paul |
geographic_facet |
Saint-Paul |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Ecography volume 40, issue 3, page 365-375 ISSN 0906-7590 1600-0587 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ecog.02209 |
container_title |
Ecography |
container_volume |
40 |
container_issue |
3 |
container_start_page |
365 |
op_container_end_page |
375 |
_version_ |
1801382249393815552 |