Prairie wetland communities recover at different rates following hydrological restoration
Prairie wetland communities recover at different rates following hydrological restoration
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DOI：
10.1111/fwb.12822
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发表时间：
2016-11-01
影响因子：
2.7
通讯作者：
St Louis, Vincent L.
中科院分区：
文献类型：
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作者：
Bortolotti, Lauren E.;Vinebrooke, Rolf D.;St Louis, Vincent L.
草原坑洼湿地提供了许多生态系统服务，包括支持生物多样性和过滤景观水。然而，这些湿地中有一半以上已被排干用于农业，因此需要恢复以重建生态系统服务。我们评估了恢复水文恢复湿地的基础上，水化学和生物群落（浮游植物，底栖硅藻，浮游动物，大型无脊椎动物，沉水水生植被[SAV]）内和跨分类的变化。我们对加拿大萨斯喀彻温省东南部的24块湿地进行了采样，涵盖三个恢复状态：最近恢复的（研究前1- 3年恢复的; n=8）、较旧恢复的（研究前7- 14年恢复的; n=8）和自然的（从未排水; n=8）。在大约十年的重建这些以前排水湿地，水化学，大型无脊椎动物和SAV社区非常类似于那些在自然湿地。在这里，总磷和二氧化碳浓度下降，而盐度和pH值增加，随着时间的推移，因为恢复。恢复和自然的网站之间的硅藻和浮游动物群落持续没有可检测到的差异，但是，蓝藻更具有代表性的恢复湿地我们的研究结果表明，水文恢复是一种有效的工具，重新建立基线水质和草原湿地的能力，以支持跨多个营养水平的生物多样性。然而，鉴于某些物种的重建存在十年滞后，最好保护和保留景观上的完整湿地。
Prairie pothole wetlands provide many ecosystem services, including supporting biodiversity and filtering water on the landscape. However, over half of these wetlands have been drained for agriculture, thereby requiring restoration to re-establish ecosystem services. We assessed the recovery of hydrologically restored wetlands based on water chemistry and taxonomic shifts within and across five biological communities (phytoplankton, benthic diatoms, zooplankton, macroinvertebrates, submersed aquatic vegetation [SAV]). We sampled 24 wetlands in southeastern Saskatchewan, Canada, spanning three restoration states: recently restored (restored 1-3years before the study; n=8), older restored (restored 7-14years before the study; n=8) and natural (never drained; n=8). Within approximately a decade of the re-establishment of these previously drained wetlands, water chemistry, macroinvertebrate and SAV communities closely resembled those in natural wetlands. Here, total phosphorus and carbon dioxide concentrations declined, while salinity and pH increased, with time since restoration. No detectable differences in diatom and zooplankton communities persisted among the restored and natural sites; however, cyanobacteria were more representative of the restored wetlands Our findings suggest that hydrological restoration is an effective tool for re-establishing baseline water quality and the capacity of prairie wetlands to support biodiversity across multiple trophic levels. However, given that there is a decadal lag in the re-establishment of certain species, it is preferable to protect and retain intact wetlands on the landscape.