Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15735 |
Albatrosses respond adaptively to climate variability by changing variance in a foraging trait | |
Samantha C. Patrick; Julien G. A. Martin; Caroline C. Ummenhofer; Alexandre Corbeau; Henri Weimerskirch | |
2021-07-29 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | The ability of individuals and populations to adapt to a changing climate is a key determinant of population dynamics. While changes in mean behaviour are well studied, changes in trait variance have been largely ignored, despite being assumed to be crucial for adapting to a changing environment. As the ability to acquire resources is essential to both reproduction and survival, changes in behaviours that maximize resource acquisition should be under selection. Here, using foraging trip duration data collected over 7 years on black-browed albatrosses (Thalassarche melanophris) on the Kerguelen Islands in the southern Indian Ocean, we examined the importance of changes in the mean and variance in foraging behaviour, and the associated effects on fitness, in response to the El Niño Southern Oscillation (ENSO). Using double hierarchical models, we found no evidence that individuals change their mean foraging trip duration in response to a changing environment, but found strong evidence of changes in variance. Younger birds showed greater variability in foraging trip duration in poor conditions as did birds with higher fitness. However, during brooding, birds showed greater variability in foraging behaviour under good conditions, suggesting that optimal conditions allow the alteration between chick provisioning and self-maintenance trips. We found weak correlations between sea surface temperature and the ENSO, but stronger links with sea-level pressure. We suggest that variability in behavioural traits affecting resource acquisition is under selection and offers a mechanism by which individuals can adapt to a changing climate. Studies which look only at effects on mean behaviour may underestimate the effects of climate change and fail to consider variance in traits as a key evolutionary force. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/335317 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Samantha C. Patrick,Julien G. A. Martin,Caroline C. Ummenhofer,et al. Albatrosses respond adaptively to climate variability by changing variance in a foraging trait[J]. Global Change Biology,2021. |
APA | Samantha C. Patrick,Julien G. A. Martin,Caroline C. Ummenhofer,Alexandre Corbeau,&Henri Weimerskirch.(2021).Albatrosses respond adaptively to climate variability by changing variance in a foraging trait.Global Change Biology. |
MLA | Samantha C. Patrick,et al."Albatrosses respond adaptively to climate variability by changing variance in a foraging trait".Global Change Biology (2021). |
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