Efectos del cambio climático sobre el rendimiento fisiológico y la distribución de Diplolaemus leopardinus (Leiosauridae)
Climate change represents one of the anthropogenic disturbances that has the greatest effect on biodiversity. It is predicted that within the next 50 years, in the region of the Central Andes, there will be an increase in temperature of 4 °C, as well as an increase in periods of drought. To know how...
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| Autores principales: | , , , , , |
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| Publicado: |
2019
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| Acceso en línea: | https://bdigital.uncu.edu.ar/fichas.php?idobjeto=14564 |
| Sumario: | Climate change represents one of the anthropogenic disturbances that has the greatest effect on biodiversity. It is predicted that within the next 50 years, in the region of the Central Andes, there will be an increase in temperature of 4 °C, as well as an increase in periods of drought. To know how climate change will impact on biota will allow us to develop different conservation strategies. In particular, this disturbance will have a great impact on the ectotherms that live there, due to the close relationship that exists between the climate and its fitness. This project will study the thermal sensitivity of eco-physiological aspects related to fitness, and its variation along a latitudinal gradient. These aspects will be integrated with species distribution models, to assess the impact of climate change on Andean lizards populations, according to the scenarios projected by the IPCC for the years 2050 and 2070. As biological model we will use Diplolaemus leopardinus, a species which is characterized by having isolated populations, with specialized habitat requirements and little vagility. Because its distribution is associated with mountain systems located from north to south of Mendoza, this species provides the opportunity to study the variation of phenotypic characters along geographic gradients, allowing to explore the thermal plasticity of the species in natural environments . To carry out this study, the body temperature of the activity and the operating temperatures in the environment of the lizards will be studied. The critical and preferred temperatures, and the thermal sensitivity of bite force and metabolic rate will be evaluated. These results will be complemented to determine the warming tolerance and the thermal safety margin of the populations studied. In addition, they will be integrated with distribution data and climate projections in different climate change scenarios, to predict possible effects of this disturbance on the species. The integration of these eco-physiological aspects with the characteristics of the environment will allow to explore the exposition, the sensitivity and the adaptive capacity of the species to the increase of the projected environmental temperatures. |
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