Department of Biology, FI-20014, University of Turku, Finland; Department of Forest Sciences, P.O. Box 27, University of Helsinki, FI-00014 Helsinki, Finland.
Department of Forest Sciences, P.O. Box 27, University of Helsinki, FI-00014 Helsinki, Finland.
Sci Total Environ. 2020 Jul 1;724:138199. doi: 10.1016/j.scitotenv.2020.138199. Epub 2020 Mar 25.
Surface water browning affects boreal lakes in the Northern Hemisphere. This process is expected to increase with global warming. Boreal lakes are the most numerous lakes on Earth. These ecosystems are particularly sensitive to disturbances due to their low biodiversity compared to other aquatic environments. The recent darkening of surface water is expected to hinder key ecosystem processes, particularly through lower primary productivity and loss of biodiversity. However, studies based on long-term data collections have rarely been conducted on the ecological consequences of water browning on aquatic food webs, especially concerning its impacts on invertebrate communities. For the first time, our analysis based on two decades of data collection in Finnish lakes highlighted a relation between water browning and a decline in aquatic macroinvertebrate abundances. Aquatic invertebrates are the main food resource for many secondary predators such as fish and waterbirds, hence such effect on their populations may have major consequences for boreal ecosystem functioning.
地表水污染影响北半球的北方湖泊。随着全球变暖，这一过程预计将会加剧。北方湖泊是地球上数量最多的湖泊。与其他水生环境相比，由于其生物多样性较低，这些生态系统对干扰特别敏感。最近地表水污染的加剧预计将阻碍关键的生态系统进程，特别是通过降低初级生产力和生物多样性的丧失。然而，基于长期数据收集的研究很少针对水变色对水生食物网的生态后果进行研究，特别是其对无脊椎动物群落的影响。我们首次基于芬兰湖泊二十年的数据收集分析，强调了地表水污染与水生大型无脊椎动物丰度下降之间的关系。水生无脊椎动物是许多次级捕食者（如鱼类和水禽）的主要食物来源，因此对其种群的这种影响可能对北方生态系统功能产生重大影响。
