怀洪新河蓄水性河段浮游植物功能群演替及水生态评价OA北大核心CHSSCDCSTPCD
Functional Groups Succession and Aquatic Ecological Evaluation of Phytoplankton in the Aqueductary Section of Huaihong River
为探究怀洪新河蓄水性河段浮游植物功能群演替及水生态现状,于2019-2020年在怀洪新河新浍河段开展8次季度调查.采用浮游植物功能群划分法和冗余分析(RDA)探究浮游植物功能群演替特征以及主要环境影响因子,采用综合营养状态指数、多样性指数、河流生态健康指数(Qr)对水环境状况进行综合评价.结果显示,调查期间怀洪新河浮游植物共8门70属136种,绿藻门种类数量占比最高(52.21％),蓝藻门(19.12％)与硅藻门次之(13.24％).浮游植物丰度季度均值变化范围为1.60×106～3.61×107 L-1,平均为(8.99±3.84)×106 L-1;生物量季度均值变化范围为0.59～6.07 mg·L-1,平均为(2.48±0.35)mg·L-1.浮游植物优势种主要为尖尾蓝隐藻(Chroomonas acuta)、啮蚀隐藻(Cryptomonas erosa)、梅尼小环藻(Cryptocryptophyta acuminatum)和微囊藻(Microcystis)等.怀洪新河共划分出25个功能群,其中优势功能群9个,2019-2020年优势功能群季节演替特征为 B、X2、Y(春季)→M、J、Y(夏季)→B、P、Y(秋季)→B、X2、Y(冬季)→B、X2、Y(春季)→J、S1、S2、Y(夏季)→B、P、J、Y(秋季)→B、E、Y(冬季),主要优势功能群B、Y指示怀洪新河水体为中至富营养静水状态.RDA结果显示,温度、氮磷营养盐和pH值是影响怀洪新河优势功能群演替的主要环境因子.Qr指数指示怀洪新河新浍河段水质为"好-中等",与综合营养状态指数评价结果相近.相较于多样性指数,Qr指数更适用于怀洪新河蓄水河段水生态评价.
In order to explore the succession of phytoplankton functional groups and the status of aquatic ecology in the aqueducturous section of Huaihong River,eight quarterly surveys were carried out on the Xinhuihe section of Huaihong River in 2019 and 2020.The evolution trend of phytoplankton functional groups and the main environmental factors were investigated by using the functional group division method and redundancy analysis(RDA).The comprehensive nutritional status index,diversity index and Qr index were used to evaluate the water environment.The results show that during the survey period,there were 136 species in 70 genera and 8 phyla in Huaihong River.Chlorophyta accounted for the highest number of species(52.21％),followed by cyanobacteria(19.12％)and diatoms(13.24％).The mean quarterly varia-tion of phytoplankton abundance ranged from 1.60×106 to 3.61×107 L-1,with an average of(8.99±3.84×106)L-1,and the mean quarterly variation of biomass ranged from 0.59 to 6.07 mg·L-1.The mean value was(2.48±0.35)mg·L-1.The dominant species of phytoplankton were Chroomonas acuta,Cryptomonas erosa,Cryptocryptophyta acuminatum,Mi-crocystis and so on.A total of 25 functional groups were divided for Huaihong River,among which 9 were dominant func-tional groups.The seasonal succession characteristic of dominant functional groups from 2019 to 2020 was as follows:B/X2/Y(spring)→M/J/Y(summer)→B/P/Y(autumn)→B/X2/Y(winter)→B/X2/Y(spring)→J/S1/S2/Y(summer)→B/P/J/Y(autumn)→B/E/Y(winter).The dominant functional groups B and Y indicated that the water state of Huaihong River was mesotrophic to eutrophic still water.RDA results show that temperature,nitrogen and phos-phorus nutrients and pH were the main environmental factors affecting the evolution of dominant functional groups in Hua-ihong River.Qr index indicates that water quality of the Xinhuihe section of Huaihong River was"good-medium",which was similar to the evaluation result of comprehensive nutrient status index.Compared with diversity index,Qr index is more suitable for water ecological evaluation of the aqueductary section of Huaihong River.
何利聪;王东伟;周彦锋;陈永进
南京农业大学无锡渔业学院,江苏无锡 214081南京农业大学无锡渔业学院,江苏无锡 214081||中国水产科学研究院淡水渔业研究中心/农业农村部淡水渔业和种质资源利用重点实验室,江苏无锡 214081中国水产科学研究院淡水渔业研究中心/农业农村部淡水渔业和种质资源利用重点实验室,江苏无锡 214081
水产学
怀洪新河浮游植物功能群演替水生态评价
Huaihong Riverphytoplanktonfunctional groupsuccessionwater ecological evaluation
《生态与农村环境学报》 2024 (008)
1059-1069 / 11
安徽省重点水域水生生物资源监测项目(ZF2021-18-0786);中国水产科学研究院基本科研业务费(2023TD61)
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