Extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard
Temperature increases can impact biodiversity and predicting their effects is one of the main challenges facing global climate-change research. Ectotherms are sensitive to temperature change and, although predictions indicate that tropical species are highly vulnerable to global warming, they remain...
| Autor principal: | Pontes-da-Silva, Emerson |
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| Outros Autores: | Magnusson, William Ernest, Sinervo, Barry R., Caetano, Gabriel H.O., Miles, Donald B., Colli, Guarino R., Diele-Viegas, Luisa Maria, Fenker, Jéssica, Santos, Juan Carlos, Werneck, F. P. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Journal of Thermal Biology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/16942 |
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oai:repositorio:1-16942 |
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oai:repositorio:1-16942 Extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard Pontes-da-Silva, Emerson Magnusson, William Ernest Sinervo, Barry R. Caetano, Gabriel H.O. Miles, Donald B. Colli, Guarino R. Diele-Viegas, Luisa Maria Fenker, Jéssica Santos, Juan Carlos Werneck, F. P. Adult Cladistics Climate Change Deforestation Ecophysiology Environmental Temperature Greenhouse Effect Heat Tolerance Human Intraspecific Variation Lizard Local Adaptation Nonhuman Physiology Rainforest Scrub Acclimatization Animals Biological Model Body Temperature Female Lizard Locomotion Male Risk Factor Species Extinction Temperature Tropic Climate Acclimatization Animal Body Temperature Extinction, Biological Female Global Warming Lizards Locomotion Male Models, Biological Rainforest Risk Factors Temperature Tropical Climate Temperature increases can impact biodiversity and predicting their effects is one of the main challenges facing global climate-change research. Ectotherms are sensitive to temperature change and, although predictions indicate that tropical species are highly vulnerable to global warming, they remain one of the least studied groups with respect to the extent of physiological variation and local extinction risks. We model the extinction risks for a tropical heliothermic teiid lizard (Kentropyx calcarata) integrating previously obtained information on intraspecific phylogeographic structure, eco-physiological traits and contemporary species distributions in the Amazon rainforest and its ecotone to the Cerrado savannah. We also investigated how thermal-biology traits vary throughout the species' geographic range and the consequences of such variation for lineage vulnerability. We show substantial variation in thermal tolerance of individuals among thermally distinct sites. Thermal critical limits were highly correlated with operative environmental temperatures. Our physiological/climatic model predicted relative extinction risks for local populations within clades of K. calcarata for 2050 ranging between 26.1% and 70.8%, while for 2070, extinction risks ranged from 52.8% to 92.8%. Our results support the hypothesis that tropical-lizard taxa are at high risk of local extinction caused by increasing temperatures. However, the thermo-physiological differences found across the species' distribution suggest that local adaptation may allow persistence of this tropical ectotherm in global warming scenarios. These results will serve as basis to further research to investigate the strength of local adaptation to climate change. Persistence of Kentropyx calcarata also depends on forest preservation, but the Amazon rainforest is currently under high deforestation rates. We argue that higher conservation priority is necessary so the Amazon rainforest can fulfill its capacity to absorb the impacts of temperature increase on tropical ectotherms during climate change. © 2018 Elsevier Ltd 2020-06-15T21:37:30Z 2020-06-15T21:37:30Z 2018 Artigo https://repositorio.inpa.gov.br/handle/1/16942 10.1016/j.jtherbio.2018.01.013 en Volume 73, Pags. 50-60 Restrito Journal of Thermal Biology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Adult Cladistics Climate Change Deforestation Ecophysiology Environmental Temperature Greenhouse Effect Heat Tolerance Human Intraspecific Variation Lizard Local Adaptation Nonhuman Physiology Rainforest Scrub Acclimatization Animals Biological Model Body Temperature Female Lizard Locomotion Male Risk Factor Species Extinction Temperature Tropic Climate Acclimatization Animal Body Temperature Extinction, Biological Female Global Warming Lizards Locomotion Male Models, Biological Rainforest Risk Factors Temperature Tropical Climate |
| spellingShingle |
Adult Cladistics Climate Change Deforestation Ecophysiology Environmental Temperature Greenhouse Effect Heat Tolerance Human Intraspecific Variation Lizard Local Adaptation Nonhuman Physiology Rainforest Scrub Acclimatization Animals Biological Model Body Temperature Female Lizard Locomotion Male Risk Factor Species Extinction Temperature Tropic Climate Acclimatization Animal Body Temperature Extinction, Biological Female Global Warming Lizards Locomotion Male Models, Biological Rainforest Risk Factors Temperature Tropical Climate Pontes-da-Silva, Emerson Extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard |
| topic_facet |
Adult Cladistics Climate Change Deforestation Ecophysiology Environmental Temperature Greenhouse Effect Heat Tolerance Human Intraspecific Variation Lizard Local Adaptation Nonhuman Physiology Rainforest Scrub Acclimatization Animals Biological Model Body Temperature Female Lizard Locomotion Male Risk Factor Species Extinction Temperature Tropic Climate Acclimatization Animal Body Temperature Extinction, Biological Female Global Warming Lizards Locomotion Male Models, Biological Rainforest Risk Factors Temperature Tropical Climate |
| description |
Temperature increases can impact biodiversity and predicting their effects is one of the main challenges facing global climate-change research. Ectotherms are sensitive to temperature change and, although predictions indicate that tropical species are highly vulnerable to global warming, they remain one of the least studied groups with respect to the extent of physiological variation and local extinction risks. We model the extinction risks for a tropical heliothermic teiid lizard (Kentropyx calcarata) integrating previously obtained information on intraspecific phylogeographic structure, eco-physiological traits and contemporary species distributions in the Amazon rainforest and its ecotone to the Cerrado savannah. We also investigated how thermal-biology traits vary throughout the species' geographic range and the consequences of such variation for lineage vulnerability. We show substantial variation in thermal tolerance of individuals among thermally distinct sites. Thermal critical limits were highly correlated with operative environmental temperatures. Our physiological/climatic model predicted relative extinction risks for local populations within clades of K. calcarata for 2050 ranging between 26.1% and 70.8%, while for 2070, extinction risks ranged from 52.8% to 92.8%. Our results support the hypothesis that tropical-lizard taxa are at high risk of local extinction caused by increasing temperatures. However, the thermo-physiological differences found across the species' distribution suggest that local adaptation may allow persistence of this tropical ectotherm in global warming scenarios. These results will serve as basis to further research to investigate the strength of local adaptation to climate change. Persistence of Kentropyx calcarata also depends on forest preservation, but the Amazon rainforest is currently under high deforestation rates. We argue that higher conservation priority is necessary so the Amazon rainforest can fulfill its capacity to absorb the impacts of temperature increase on tropical ectotherms during climate change. © 2018 Elsevier Ltd |
| format |
Artigo |
| author |
Pontes-da-Silva, Emerson |
| author2 |
Magnusson, William Ernest Sinervo, Barry R. Caetano, Gabriel H.O. Miles, Donald B. Colli, Guarino R. Diele-Viegas, Luisa Maria Fenker, Jéssica Santos, Juan Carlos Werneck, F. P. |
| author2Str |
Magnusson, William Ernest Sinervo, Barry R. Caetano, Gabriel H.O. Miles, Donald B. Colli, Guarino R. Diele-Viegas, Luisa Maria Fenker, Jéssica Santos, Juan Carlos Werneck, F. P. |
| title |
Extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard |
| title_short |
Extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard |
| title_full |
Extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard |
| title_fullStr |
Extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard |
| title_full_unstemmed |
Extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard |
| title_sort |
extinction risks forced by climatic change and intraspecific variation in the thermal physiology of a tropical lizard |
| publisher |
Journal of Thermal Biology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/16942 |
| _version_ |
1787142949244502016 |
| score |
11.755432 |