Geothermal stickleback populations prefer cool water despite multigenerational exposure to a warm environment.
Geothermal stickleback populations prefer cool water despite multigenerational exposure to a warm environment.
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DOI：
10.1002/ece3.9654
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发表时间：
2023-01
影响因子：
2.6
通讯作者：
中科院分区：
文献类型：
--
作者：
鉴于气候变化对生物多样性的威胁，越来越多的研究正在调查生物体适应温度上升的潜力。早期的研究预测，对气候变化的生理适应将伴随着温度偏好的转变，但缺乏经验证据。在这里，我们测试暴露于不同的热环境是否会导致野外首选温度的变化。我们的研究利用了冰岛的一个“自然实验”，在那里，三刺鱼（Gasterosteus aculeatus）的淡水种群被发现在全年地热活动变暖的沃茨（温暖的栖息地），邻近环境温度湖泊（寒冷的栖息地）的种群。我们使用穿梭箱的方法来测量三个温暖寒冷的种群对野生捕获的棘鱼的温度偏好。我们的预测是，来自温暖栖息地的鱼类比来自寒冷栖息地的鱼类更喜欢较高的水温。我们没有发现支持这一点的证据，因为来自温暖和寒冷栖息地的鱼类的平均偏好温度为13°C。因此，我们的研究结果挑战的假设，将有一个转变，在变温动物的温度偏好，以应对气候变化。此外，由于温暖栖息地的鱼类可以在相对较高的温度下坚持，尽管温度较低的偏好，我们认为，偏好的温度可能是一个人口的适应潜力，一个新的热环境的不良指标。我们测试了来自地热温暖湖泊的刺鱼是否比来自环境温度湖泊的刺鱼更喜欢实验室中更高的水温。令人惊讶的是，我们发现来自两个热栖息地的鱼类的平均首选温度为13°C，这大大低于一年中大部分时间温暖栖息地的鱼类所经历的温度。我们的研究结果挑战的假设，将有一个转变外温动物的温度偏好，以应对气候变化，并建议，首选的温度可能是一个穷人的人口的适应潜力，一个新的热环境的指标。
Given the threat of climate change to biodiversity, a growing number of studies are investigating the potential for organisms to adapt to rising temperatures. Earlier work has predicted that physiological adaptation to climate change will be accompanied by a shift in temperature preferences, but empirical evidence for this is lacking. Here, we test whether exposure to different thermal environments has led to changes in preferred temperatures in the wild. Our study takes advantage of a “natural experiment” in Iceland, where freshwater populations of threespine sticklebacks (Gasterosteus aculeatus) are found in waters warmed by geothermal activity year‐round (warm habitats), adjacent to populations in ambient‐temperature lakes (cold habitats). We used a shuttle‐box approach to measure temperature preferences of wild‐caught sticklebacks from three warm–cold population pairs. Our prediction was that fish from warm habitats would prefer higher water temperatures than those from cold habitats. We found no support for this, as fish from both warm and cold habitats had an average preferred temperature of 13°C. Thus, our results challenge the assumption that there will be a shift in ectotherm temperature preferences in response to climate change. In addition, since warm‐habitat fish can persist at relatively high temperatures despite a lower‐temperature preference, we suggest that preferred temperature alone may be a poor indicator of a population's adaptive potential to a novel thermal environment. We tested whether sticklebacks from geothermally‐warmed lakes prefer a higher water temperature in the laboratory than sticklebacks from ambient‐temperature lakes. Surprisingly, we found that fish from both thermal habitats had an average preferred temperature of 13°C, which is considerably lower than the temperatures experienced by fish in warm habitats for most of the year. Our results challenge the assumption that there will be a shift in ectotherm temperature preferences in response to climate change and suggest that preferred temperature alone may be a poor indicator of a population's adaptive potential to a novel thermal environment.
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DOI：
10.1111/1365-2656.12244
发表时间：
2014-11
期刊：
The Journal of animal ecology
影响因子：
--
作者：
Killen SS
通讯作者：
Killen SS
影响因子：
3.3
作者：
HUEY, RB;BENNETT, AF
通讯作者：
BENNETT, AF
影响因子：
6.4
作者：
Buckley, Lauren B.;Huey, Raymond B.;Kingsolver, Joel G.
通讯作者：
Kingsolver, Joel G.
影响因子：
11.6
作者：
Hovel, Rachel A.;Carlson, Stephanie M.;Quinn, Thomas P.
通讯作者：
Quinn, Thomas P.
影响因子：
2
作者：
JOBLING, M
通讯作者：
JOBLING, M