Ecological improvement by restoration on the Jialu River: water quality, species richness and distribution
Ecological improvement by restoration on the Jialu River: water quality, species richness and distribution
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贾鲁河恢复生态改善：水质、物种丰富度和分布
DOI：
10.1071/mf19262
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发表时间：
2020-11-25
影响因子：
1.8
通讯作者：
Tian, Xingjun
中科院分区：
文献类型：
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作者：
Kong, Xiangshi;Tian, Kai;Tian, Xingjun
贾鲁河水质严重恶化，生物多样性下降。实施了生态恢复工程。通过对贾鲁河生态修复前后的水质、物种丰富度和分布的调查，说明贾鲁河生态修复的效果。工程实施后，总氮（TN）、总磷（TP）、化学需氧量（COD）和氨氮（NH 4 +-N）分别下降了38.69%、40.52%、39.06%和45.07%。恢复后，这些指标的浓度保持在稳定的水平，表明稳定的净化能力已经建立。但TN、TP和NH 4 +-N浓度仍高于国家地表水V类标准。结果表明，共发现155种水生植物，隶属于94科，其中海岸植物所占比例最大，为26.53%。生物群在空间和时间上显示出不同的分布模式，但浮游动物和浮游植物物种除外，它们在空间和时间上均匀分布。大部分种类（71.71%）仅分布于一个或两个地点。与2013年7月相比，到2015年7月，物种丰富度平均增加了65.61%。此外，2015年7月发现了31种新的本地物种，涵盖主要功能群（水生植物，底栖动物和鱼类）。该项目恢复了完整的食物链，短期内有助于净化水质，长期内有助于鸟类重返贾鲁河。本研究评估贾鲁河的恢复，其结果将为未来的生态系统恢复工程提供参考。
The Jialu River has experienced serious water quality deterioration and biodiversity decline. An ecological restoration project was undertaken. We investigated water quality, species richness and distribution before and after restoration to describe ecological improvements on the Jialu River. After the project, total nitrogen (TN), total phosphorus (TP), chemical oxygen demand (COD) and ammonium nitrogen (NH4+-N) decreased by 38.69, 40.52, 39.06 and 45.07% respectively. Concentrations of these indices were maintained at steady levels after restoration, indicating stable purification capacity had been established. However, TN, TP and NH4+-N concentrations were still higher than Level V of the Chinese surface water standards. In all, 155 species, belonging to 94 families, were found, with shore plants accounting for the largest proportion (26.53%). The biota showed different distribution patterns over space and time, except for species of zooplankton and phytoplankton, which were evenly distributed over space and time. Most species (71.71%) occurred in only one or two sites. Compared with July 2013, by July 2015 species richness had increased, on average, 65.61%. Furthermore, 31 novel native species were found in July 2015, covering the main functional groups (hydrophytes, zoobenthos and fishes). The recovery of an intact food chain as a result of the project facilitated water purification in the short term and the return of birds to the Jialu River in the long term. This study evaluated the recovery of the Jialu River and the results will inform future ecosystem restoration projects.