Climate Change Alters Sexual Signaling in a Desert-Adapted Frog

Climate Change Alters Sexual Signaling in a Desert-Adapted Frog
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气候变化改变了适应沙漠的青蛙的性信号

DOI:
10.1086/722174
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发表时间:
2023
期刊:
The American Naturalist
影响因子:
--
通讯作者:
Pfennig, Karin S.
Pfennig, Karin S.
中科院分区:
--
文献类型:
--
作者:
Calabrese, Gina M.;Pfennig, Karin S.

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气候变化正在改变物种的栖息地、物候和行为。虽然性行为影响种群的持久性和适应性,但气候变化对性信号的影响尚未得到充分研究。气候变化可以直接改变依赖温度的性信号,导致影响信号产生的身体大小或状况的变化,或者改变性信号的选择性景观。我们测试了墨西哥spadefoot蟾蜍(Spea multiplicata)的温度依赖性交配呼叫是否与美国西南部22年来的气候变化一致。我们记录了气温上升,降雨量减少,以及铲足类栖息地温度和降雨量的季节性变化。尽管气温不断上升,但在大多数海拔地区,铲足雀短暂的繁殖池已经变得越来越冷,因此雄性的叫声也越来越慢。然而,温度标准化的呼叫字符已经变得更快,男性的条件有所增加,可能是由于选择性环境的变化。因此,气候变化可能会导致性信号发生快速、复杂的变化,并产生重要的进化后果。
Climate change is altering species’ habitats, phenology, and behavior. Although sexual behaviors impact population persistence and fitness, climate change’s effects on sexual signals are understudied. Climate change can directly alter temperature-dependent sexual signals, cause changes in body size or condition that affect signal production, or alter the selective landscape of sexual signals. We tested whether temperature-dependent mating calls of Mexican spadefoot toads (Spea multiplicata) had changed in concert with climate in the southwestern United States across 22 years. We document increasing air temperatures, decreasing rainfall, and changing seasonal patterns of temperature and rainfall in the spadefoots’ habitat. Despite increasing air temperatures, spadefoots’ ephemeral breeding ponds have been getting colder at most elevations, and male calls have been slowing as a result. However, temperature-standardized call characters have become faster, and male condition has increased, possibly due to changes in the selective environment. Thus, climate change might generate rapid, complex changes in sexual signals with important evolutionary consequences.
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