Mushet D M, Christensen J, Bennett M, Alexander L C
U.S. Geological Survey Northern Prairie Wildlife Research Center.
U.S. Environmental Protection Agency.
Water Resour Impact. 2017 Mar;19(2):11-13.
When we think about connections in and among aquatic systems, we typically envision clear headwater streams flowing into downstream rivers, river floodwaters spilling out onto adjacent floodplains, or groundwater connecting wetlands to lakes and streams. However, there is another layer of connectivity moving materials among freshwater systems, one with connections that are not always tied to down-gradient flows of surface waters and groundwater. These movements are those of organisms, key components of virtually every freshwater system on the planet. In their movements across the landscape, biota connect aquatic systems in often-overlooked ways.
当我们思考水生系统内部及相互之间的联系时，通常会设想清澈的源头溪流汇入下游河流、河水泛滥蔓延至邻近的洪泛平原，或者地下水将湿地与湖泊及溪流相连。然而，在淡水系统之间还有另一层物质连通性，其联系并不总是与地表水和地下水的下坡流动相关。这些移动是生物的移动，而生物几乎是地球上每个淡水系统的关键组成部分。在其穿越陆地景观的移动过程中，生物群落以常常被忽视的方式将水生系统连接起来。
