Microgeographical variation in thermal preference by an amphibian
Microgeographical variation in thermal preference by an amphibian
复制标题
DOI：
10.1111/j.1461-0248.2004.00587.x
复制
发表时间：
2004-05-01
期刊：
影响因子：
8.8
通讯作者：
Skelly, DK
中科院分区：
文献类型：
--
作者：
Freidenburg, LK;Skelly, DK
变温动物利用行为来缓冲温度对生长、发育和生存的影响。虽然行为性体温调节被广泛报道，但热偏好的局部适应文献很少。两栖动物的幼虫生活在从完全开放到被植被覆盖的湿地中。我们假设种群经历了局部选择，导致热偏好行为的反梯度模式。具体而言，我们预测封闭林冠池中的林蛙（Rana sylvatica）幼虫比开放林冠池中的林蛙具有更强的温度选择性，并且更喜欢更高的温度。在对美国康涅狄格州东北部六个养殖池塘的研究中，这些预测得到了证实。本文所记录的热偏好的反梯度微地理变异表明，面对不同的选择压力，林蛙种群可能已经迅速分化。对热环境变化的快速、行为介导的反应对于理解人口对气候变化的反应具有重要意义。
Ectotherms use behaviour to buffer effects of temperature on growth, development and survival. While behavioural thermoregulation is widely reported, localized adaptation of thermal preference is poorly documented. Larval amphibians live in wetlands ranging from entirely open to heavily shaded by vegetation. We hypothesized that populations undergo localized selection leading to countergradient patterns of thermal preference behaviour. Specifically, we predicted that wood frog (Rana sylvatica) larvae from closed canopy ponds would be more strongly temperature selective and would prefer higher temperatures than conspecifics from populations found in open canopy ponds. In a study of six breeding ponds in north-eastern Connecticut, USA, these predictions were upheld. The countergradient, microgeographical variation in thermal preference documented here implies that wood frog populations may have diverged rapidly in the face of contrasting selection pressures. Rapid, behaviourally mediated responses to changing thermal environments have important implications for understanding population responses to climate change.