Reef fishes weaken dietary preferences after coral mortality, altering resource overlap.
Reef fishes weaken dietary preferences after coral mortality, altering resource overlap.
复制标题
DOI：
10.1111/1365-2656.13796
复制
发表时间：
2022-10
影响因子：
4.8
通讯作者：
Keith, Sally A.
中科院分区：
文献类型：
--
作者：
Semmler, Robert F.;Sanders, Nathan J.;CaraDonna, Paul J.;Baird, Andrew H.;Jing, Xin;Robinson, James P. W.;Graham, Nicholas A. J.;Keith, Sally A.
气候变化的直接和间接影响可以影响动物行为的变化，并受其影响。然而，我们往往缺乏足够的经验数据来评估大规模骚乱如何影响个人的行为，进而影响社区。在这里，我们通过重点研究蝴蝶鱼的觅食行为来研究这些模式，蝴蝶鱼是珊瑚礁上主要的捕食珊瑚的鱼类，在日本伊里奥莫特发生大规模珊瑚漂白事件前后。为了应对65%的珊瑚死亡率，以珊瑚为食的鱼类扩大了它们的饮食范围，显示出不同物种的饮食偏好显著减弱。多个物种减少了对漂白敏感的Acropora珊瑚的消费，同时扩大了它们的饮食，以消费各种其他珊瑚属。这导致蝴蝶鱼之间的食物重叠减少。短期内，应对白化的行为变化可能会增加珊瑚礁鱼类的复原力。然而，珊瑚死亡减少了世界各地的珊瑚食性动物的数量，这表明我们在这里记录的摄食行为的变化可能不足以确保蝴蝶鱼在珊瑚礁上的长期适应能力。这项工作突出了珊瑚漂白对珊瑚礁鱼类饲料的特殊性的重要自下而上的影响。这种跨物种同步的饮食扩张遵循了最优觅食理论的预期，并受到食物损失后饮食偏好减弱的推动。这些变化可能会显著改变资源重叠。一只正在喂食三条斑齿象的个体的照片(出处：萨莉·基思)。
The direct and indirect effects of climate change can affect, and are mediated by, changes in animal behaviour. However, we often lack sufficient empirical data to assess how large‐scale disturbances affect the behaviour of individuals, which scales up to influence communities. Here, we investigate these patterns by focusing on the foraging behaviour of butterflyfishes, prominent coral‐feeding fishes on coral reefs, before and after a mass coral bleaching event in Iriomote, Japan. In response to 65% coral mortality, coral‐feeding fishes broadened their diets, showing a significant weakening of dietary preferences across species. Multiple species reduced their consumption of bleaching‐sensitive Acropora corals, while expanding their diets to consume a variety of other coral genera. This resulted in decreased dietary overlap among butterflyfishes. Behavioural changes in response to bleaching may increase resilience of coral reef fishes in the short term. However, coral mortality has reduced populations of coral‐feeders world‐wide, indicating the changes in feeding behaviour we document here may not be sufficient to ensure long‐term resilience of butterflyfishes on coral reefs. This work highlights important bottom‐up effects of coral bleaching on the specificity of reef fish diets. This simultaneous dietary expansion across species follows expectations from optimal foraging theory and is driven by a weakening of dietary preferences in response to food loss. These changes can significantly alter resource overlap. Photo of a feeding Chaetodon trifascialis individual (credit: Sally Keith).
登录
查看更多内容
影响因子：
2.9
作者：
EMLEN, JM
通讯作者：
EMLEN, JM
影响因子：
1.8
作者：
Coppock, Amy G.;Gardiner, Naomi M.;Jones, Geoffrey P.
通讯作者：
Jones, Geoffrey P.
DOI：
10.1139/b85-200
发表时间：
1985-01-01
期刊：
Canadian Journal of Botany
影响因子：
--
作者：
Moral, R. del
通讯作者：
Moral, R. del
影响因子：
56.9
作者：
Hughes, Terry P.;Anderson, Kristen D.;Wilson, Shaun K.
通讯作者：
Wilson, Shaun K.
影响因子：
2.5
作者：
Berumen, ML;Pratchett, MS;McCormick, MI
通讯作者：
McCormick, MI