CLIMATE-CHANGE AND TEMPERATURE-DEPENDENT SEX DETERMINATION IN REPTILES
CLIMATE-CHANGE AND TEMPERATURE-DEPENDENT SEX DETERMINATION IN REPTILES
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DOI：
10.1073/pnas.91.16.7487
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发表时间：
1994-08-02
影响因子：
11.1
通讯作者：
JANZEN, FJ
中科院分区：
文献类型：
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作者：
JANZEN, FJ
尽管人们越来越关注全球温度变化的可能影响，但很少有经验证据表明温度对自然系统中生物相互作用的直接影响。明确评估气候温度变化的生态和进化的影响，需要一个自然系统中的人口表现出直接明确的适应性反应的温度波动。我监测巢的人口彩绘龟（picta）与温度依赖性的性别决定，以调查当地气候变化的温度和后代性别比之间的因果关系。与理论预测一致，每年的后代性别比与平均7月气温高度相关，验证了气候变化对人口统计学影响的担忧。这种相关性意味着，即使平均气温略有上升（
Despite Increasing concern over the possible impact of global temperature change, there is little empirical evidence of direct temperature effects on biotic interactions in natural systems. Clear assessment of the ecological and evolutionary impact of changing climatic temperature requires a natural system in which populations exhibit a direct unambiguous fitness response to thermal fluctuation. I monitored nests of a population of painted turtles (Chrysemys picta) with temperature-dependent sex determination to investigate the causal relationship between local climatic variation in temperature and offspring sex ratio. Consistent with theoretical predictions, annual offspring sex ratio was highly correlated with mean July air temperature, validating concerns about the effect of climate change on population demography. This correlation implies that even modest increases in mean temperature (