Climatic breadth of calling behaviour in two widespread Neotropical frogs: Insights from humidity extremes.,Global Change Biology

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Climatic breadth of calling behaviour in two widespread Neotropical frogs: Insights from humidity extremes.
Global Change Biology ( IF 10.8 ) Pub Date : 2020-07-12 , DOI: 10.1111/gcb.15266
Anaïs Bonnefond ₁ , Elodie A Courtois ₁ , Jérôme Sueur ₂ , Larissa Sayuri M Sugai _{3,

4} , Diego Llusia _{4,

5,

6}

Affiliation

Climate change is severely altering precipitation regimes at local and global scales, yet the capacity of species to cope with these changes has been insufficiently examined. Amphibians are globally endangered and particularly sensitive to moisture conditions. For mating, most amphibian species rely on calling behaviour, which is a key weather‐dependent trait. Using passive acoustics, we monitored the calling behaviour of two widespread Neotropical frogs in 12 populations located at the humidity extremes but thermal mean of the species distribution. Based on 2,554 hr of recordings over a breeding season, we found that both the aquatic species Pseudis paradoxa and the arboreal species Boana raniceps exhibited calling behaviour at a wide range of relative humidity. Calling humidity was significantly lower in conspecific populations subjected to drier conditions, while calling temperature did not differ between populations or species. Overall, no variation in climatic breadth was observed between large and small choruses, and calling behaviour was scarcely detected during the driest, hottest and coldest potential periods of breeding. Our results showed that calling humidity of the studied species varies according to the precipitation regime, suggesting that widespread Neotropical anurans may have the capacity to exhibit sexual displays in different climatic environments. Regardless of the underlying mechanism (plasticity or local adaptation), which should be determined by common garden experiments, a wide and population‐specific climatic breadth of calling behaviour may assist species to deal with changing humidity conditions. To our knowledge, this is the first study to explore the response capacity of anurans to perform calling behaviour under contrasting precipitation regimes.

中文翻译：

在两只新近传播的新青蛙中，其行为的气候广度：极端湿度的见解。

气候变化正在严重改变地方和全球范围内的降水机制，但尚未充分研究物种应对这些变化的能力。两栖动物在全球范围内处于危险之中，并且对湿度条件特别敏感。为了交配，大多数两栖动物都依赖于呼唤行为，这是关键的依赖天气的特征。使用无源声学，我们监测了位于湿度极端但物种分布的热均值下的12个种群中的两只新热带青蛙的鸣叫行为。根据一个繁殖季节的2,554小时记录，我们发现水生物种Pseudis paradoxa和树栖物种Boana raniceps在较大的相对湿度范围内表现出呼叫行为。在较干燥的条件下，同种种群的呼出湿度明显较低，而种群或物种之间的呼出温度没有差异。总体而言，在大，小合唱之间均未观察到气候广度的变化，并且在最干燥，最热和最冷的潜在繁殖期几乎没有发现鸣叫行为。我们的结果表明，所研究物种的呼入湿度根据降水情况而变化，这表明广泛分布的新热带无核生物可能具有在不同气候环境中表现出性展示的能力。无论应通过常见的花园实验确定其潜在机制（可塑性或局部适应性），广泛的，特定于人群的气候活动范围可以帮助物种应对不断变化的湿度条件。据我们所知，这是第一个探索无色动物在不同降水方式下执行呼唤行为的反应能力的研究。

更新日期：2020-07-12

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