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Upper Temperature Limits of Tropical Marine Ectotherms: Global Warming Implications
Animal physiology, ecology and evolution are affected by temperature and it is expected that community structure will be strongly influenced by global warming. This is particularly relevant in the tropics, where organisms are already living close to their upper temperature limits and hence are highl...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3248430/ https://www.ncbi.nlm.nih.gov/pubmed/22242115 http://dx.doi.org/10.1371/journal.pone.0029340 |
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author | Nguyen, Khanh Dung T. Morley, Simon A. Lai, Chien-Houng Clark, Melody S. Tan, Koh Siang Bates, Amanda E. Peck, Lloyd S. |
author_facet | Nguyen, Khanh Dung T. Morley, Simon A. Lai, Chien-Houng Clark, Melody S. Tan, Koh Siang Bates, Amanda E. Peck, Lloyd S. |
author_sort | Nguyen, Khanh Dung T. |
collection | PubMed |
description | Animal physiology, ecology and evolution are affected by temperature and it is expected that community structure will be strongly influenced by global warming. This is particularly relevant in the tropics, where organisms are already living close to their upper temperature limits and hence are highly vulnerable to rising temperature. Here we present data on upper temperature limits of 34 tropical marine ectotherm species from seven phyla living in intertidal and subtidal habitats. Short term thermal tolerances and vertical distributions were correlated, i.e., upper shore animals have higher thermal tolerance than lower shore and subtidal animals; however, animals, despite their respective tidal height, were susceptible to the same temperature in the long term. When temperatures were raised by 1°C hour(−1), the upper lethal temperature range of intertidal ectotherms was 41–52°C, but this range was narrower and reduced to 37–41°C in subtidal animals. The rate of temperature change, however, affected intertidal and subtidal animals differently. In chronic heating experiments when temperature was raised weekly or monthly instead of every hour, upper temperature limits of subtidal species decreased from 40°C to 35.4°C, while the decrease was more than 10°C in high shore organisms. Hence in the long term, activity and survival of tropical marine organisms could be compromised just 2–3°C above present seawater temperatures. Differences between animals from environments that experience different levels of temperature variability suggest that the physiological mechanisms underlying thermal sensitivity may vary at different rates of warming. |
format | Online Article Text |
id | pubmed-3248430 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-32484302012-01-12 Upper Temperature Limits of Tropical Marine Ectotherms: Global Warming Implications Nguyen, Khanh Dung T. Morley, Simon A. Lai, Chien-Houng Clark, Melody S. Tan, Koh Siang Bates, Amanda E. Peck, Lloyd S. PLoS One Research Article Animal physiology, ecology and evolution are affected by temperature and it is expected that community structure will be strongly influenced by global warming. This is particularly relevant in the tropics, where organisms are already living close to their upper temperature limits and hence are highly vulnerable to rising temperature. Here we present data on upper temperature limits of 34 tropical marine ectotherm species from seven phyla living in intertidal and subtidal habitats. Short term thermal tolerances and vertical distributions were correlated, i.e., upper shore animals have higher thermal tolerance than lower shore and subtidal animals; however, animals, despite their respective tidal height, were susceptible to the same temperature in the long term. When temperatures were raised by 1°C hour(−1), the upper lethal temperature range of intertidal ectotherms was 41–52°C, but this range was narrower and reduced to 37–41°C in subtidal animals. The rate of temperature change, however, affected intertidal and subtidal animals differently. In chronic heating experiments when temperature was raised weekly or monthly instead of every hour, upper temperature limits of subtidal species decreased from 40°C to 35.4°C, while the decrease was more than 10°C in high shore organisms. Hence in the long term, activity and survival of tropical marine organisms could be compromised just 2–3°C above present seawater temperatures. Differences between animals from environments that experience different levels of temperature variability suggest that the physiological mechanisms underlying thermal sensitivity may vary at different rates of warming. Public Library of Science 2011-12-29 /pmc/articles/PMC3248430/ /pubmed/22242115 http://dx.doi.org/10.1371/journal.pone.0029340 Text en Nguyen et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Nguyen, Khanh Dung T. Morley, Simon A. Lai, Chien-Houng Clark, Melody S. Tan, Koh Siang Bates, Amanda E. Peck, Lloyd S. Upper Temperature Limits of Tropical Marine Ectotherms: Global Warming Implications |
title | Upper Temperature Limits of Tropical Marine Ectotherms: Global Warming Implications |
title_full | Upper Temperature Limits of Tropical Marine Ectotherms: Global Warming Implications |
title_fullStr | Upper Temperature Limits of Tropical Marine Ectotherms: Global Warming Implications |
title_full_unstemmed | Upper Temperature Limits of Tropical Marine Ectotherms: Global Warming Implications |
title_short | Upper Temperature Limits of Tropical Marine Ectotherms: Global Warming Implications |
title_sort | upper temperature limits of tropical marine ectotherms: global warming implications |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3248430/ https://www.ncbi.nlm.nih.gov/pubmed/22242115 http://dx.doi.org/10.1371/journal.pone.0029340 |
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