Food-chain length alters community responses to global change in aquatic systems
Food-chain length alters community responses to global change in aquatic systems
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DOI：
10.1038/nclimate1689
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发表时间：
2013-03-01
影响因子：
30.7
通讯作者：
Bronmark, Christer
中科院分区：
文献类型：
--
作者：
Hansson, Lars-Anders;Nicolle, Alice;Bronmark, Christer
大规模环境变化之间的协同作用，如气候变化（1）和腐殖酸含量增加（褐化）（2），将对未来的水生生态系统产生相当大的影响。在模拟、监测和实验数据的基础上，我们证明，社区对全球变化的反应是由食物链长度决定的，最高营养级及其以下的每一个二级都将受益于气候变化，而两者之间的各级将受到影响。因此，浮游植物，从而藻类水华，将受益于气候变化的三个营养级系统，而不是在两个营养级系统。此外，我们表明，浮游植物（资源）和浮游动物（消费者）提前他们的春季高峰丰度同样响应于3摄氏度的温度上升，也就是说，没有支持消费者/资源不匹配在未来的气候情景。然而，与其他分类群不同的是，蓝细菌--被称为产生毒素的讨厌的浮游植物--受益于更高的温度和腐殖物质含量，而与食物链的组成无关。我们的成果反映在自然生态系统中。通过机械地将目前的食物链理论与大规模的环境和气候变化相结合，我们为预测和理解未来的水生生态系统及其提供的生态系统服务和水资源提供了一个强大的框架。
Synergies between large-scale environmental changes, such as climate change(1) and increased humic content (brownification)(2), will have a considerable impact on future aquatic ecosystems. On the basis of modelling, monitoring and experimental data, we demonstrate that community responses to global change are determined by food-chain length and that the top trophic level, and every second level below, will benefit from climate change, whereas the levels in between will suffer. Hence, phytoplankton, and thereby algal blooms, will benefit from climate change in three-, but not in two-trophic-level systems. Moreover, we show that both phytoplankton (resource) and zooplankton (consumer) advance their spring peak abundances similarly in response to a 3 degrees C temperature increase; that is, there is no support for a consumer/resource mismatch in a future climate scenario. However, in contrast to other taxa, cyanobacteria-known as toxin-producing nuisance phytoplankton(3)-benefit from a higher temperature and humic content irrespective of the food-chain composition. Our results are mirrored in natural ecosystems. By mechanistically merging present food-chain theory with large-scale environmental and climate changes, we provide a powerful framework for predicting and understanding future aquatic ecosystems and their provision of ecosystem services and water resources.