Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15347 |
Climate warming restructures an aquatic food web over 28 years | |
Andrew J. Tanentzap; Giuseppe Morabito; Pietro Volta; Michela Rogora; Norman D. Yan; Marina Manca | |
2020-10-26 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | Climate warming can restructure lake food webs if trophic levels differ in their thermal responses, but evidence for these changes and their underlying mechanisms remain scarce in nature. Here we document how warming lake temperatures by up to 2°C, rather than changes in trophic state or fishing effort, have restructured the pelagic food web of a large European lake (Lake Maggiore, Italy). Our approach exploited abundance and biomass data collected weekly to yearly across five trophic levels from 1981 to 2008. Temperature generally had stronger effects on taxa than changes in fish predation or trophic state mediated through primary productivity. Consequently, we found that, as the lake warmed, the food web shifted in numerical abundance towards predators occupying middle trophic positions. Of these taxa, the spiny water flea (Bythotrephes longimanus) most prospered. Bythotrephes strongly limited abundances of the keystone grazer Daphnia, strengthening top‐down structuring of the food web. Warmer temperatures partly restructured the food web by advancing peak Bythotrephes densities by approximately 60 days and extending periods of positive population growth by three times. Nonetheless, our results suggested that advances in the timing and size of peak Bythotrephes densities could not outpace changes in the timing and size of peak densities in their Daphnia prey. Our results provide rare evidence from nature as to how long‐term warming can favour higher trophic levels, with the potential to strengthen top‐down control of food webs. |
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/301806 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Andrew J. Tanentzap,Giuseppe Morabito,Pietro Volta,et al. Climate warming restructures an aquatic food web over 28 years[J]. Global Change Biology,2020. |
APA | Andrew J. Tanentzap,Giuseppe Morabito,Pietro Volta,Michela Rogora,Norman D. Yan,&Marina Manca.(2020).Climate warming restructures an aquatic food web over 28 years.Global Change Biology. |
MLA | Andrew J. Tanentzap,et al."Climate warming restructures an aquatic food web over 28 years".Global Change Biology (2020). |
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