Hot droughts compromise interannual survival across all group sizes in a cooperatively breeding bird.,Ecology Letters

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Hot droughts compromise interannual survival across all group sizes in a cooperatively breeding bird.
Ecology Letters ( IF 7.6 ) Pub Date : 2020-09-17 , DOI: 10.1111/ele.13604
Amanda R Bourne ₁ , Susan J Cunningham ₁ , Claire N Spottiswoode _{1,

2} , Amanda R Ridley _{1,

3}

Affiliation

Climate change is affecting animal populations around the world and one relatively unexplored aspect of species vulnerability is whether and to what extent responses to environmental stressors might be mitigated by variation in group size in social species. We used a 15‐year data set for a cooperatively breeding bird, the southern pied babbler Turdoides bicolor, to determine the impact of temperature, rainfall and group size on body mass change and interannual survival in both juveniles and adults. Hot and dry conditions were associated with reduced juvenile growth, mass loss in adults and compromised survival between years in both juveniles (86% reduction in interannual survival) and adults (60% reduction in interannual survival). Individuals across all group sizes experienced similar effects of climatic conditions. Larger group sizes may not buffer individual group members against the impacts of hot and dry conditions, which are expected to increase in frequency and severity in future.

中文翻译：

高温干旱损害了合作繁殖的鸟类在所有群体中的年生存率。

气候变化正在影响世界各地的动物种群，物种脆弱性的一个相对未曾探索的方面是，社会物种群体规模的变化是否可以缓解到环境压力源，以及在多大程度上减轻对环境压力源的反应。我们使用了15年的数据集来研究合作繁殖的鸟类，即南部斑驳的ba鸟Turdoides bicolor，以确定温度，降雨量和团体人数对青少年和成年人体重变化和年际生存的影响。炎热和干燥的条件与减少的青少年生长，成年的体重损失以及未成年（年际生存减少86％）和成年人（年生存减少60％）之间的存活率降低相关。所有小组规模的人都经历了类似的气候条件影响。较大的团体人数可能无法缓冲单个团体成员免受炎热和干燥条件的影响，而高温和干燥条件的影响预计在将来会越来越频繁和严重。

更新日期：2020-11-12

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