Phytoplankton species composition as bioindicator in the largest fragmented channel of the Pearl River, China

文献类型： 外文期刊

第一作者： Xie, Changxin

作者： Xie, Changxin;Hu, Caiqin;Yang, Wanling;Liu, Qianfu;Wang, Chao;Xie, Changxin;Hu, Caiqin;Yang, Wanling;Liu, Qianfu;Wang, Chao;Hu, Caiqin;Yang, Wanling;Liu, Qianfu;Wang, Chao;Yang, Wanling;Liu, Qianfu;Wang, Chao;Wu, Naicheng;Wei, Jingxin

作者机构：

关键词： Cascade dam; Phytoplankton species composition; The serial discontinuity concept (SDC); Ecological indicator; Fragmented river

期刊名称：ENVIRONMENTAL MONITORING AND ASSESSMENT （ 影响因子：3.0； 五年影响因子：3.1 ）

ISSN： 0167-6369

年卷期： 2024 年 196 卷 4 期

页码：

收录情况： SCI

摘要： To test the serial discontinuity concept (SDC) predictions in a regulated river ecosystem, environmental parameters and phytoplankton community structure were determined in a subtropical river (China) which was regulated by 11 cascade dams. Our results showed that total phosphorus (TP) and silicate during the wet period in several dams supported the SDC predictions. Variations of phytoplankton species composition in several cascade dams, such as Datengxia (DTX) and Changzhou (CZ), also supported the SDC predictions. Moreover, the stations near the dams showed the maximum or minimum values of total species numbers in each cascade segment. Predictive model indicated that the types of phytoplankton decreased in the middle reaches, conforming to SDC predictions. In the whole system of cascading dams, an increase in silicate concentration and phytoplankton communities in the downstream was also consistent with SDC predictions. Therefore, these findings aligned with the SDC predictions in the aspects of both single dam and whole cascade dam system to some extent. In future research, our aim is to further investigate the effects of cascade damming on additional phytoplankton-related indices in this aquatic ecosystem. We hope to gather more comprehensive data to fully validate the SDC predictions.

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