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Characteristics of phytoplankton community and water net primary productivity response to the nutrient status of the Poyang Lake and Gan River, China
Jia, Junjie1,2; Gao, Yang1,2; Song, Xianwei1,2; Chen, Shibo3
2019-07-26
Source PublicationECOHYDROLOGY
ISSN1936-0584
Pages15
Corresponding AuthorGao, Yang(gaoyang@igsnrr.ac.cn)
AbstractPhytoplankton community characteristics and associative primary productivity, which reflect the ecological and nutritional status of water, are sensitive to environmental change. Particularly, nutrient inputs have a significant effect on phytoplankton growth and development as well as the biogeochemical cycle of watersheds. We investigated the phytoplankton community and nutrient status downstream from the Gan River into Poyang Lake. On a catchment scale, the phytoplankton communities and associative primary productivity from these two water bodies differed. The Poyang Lake phytoplankton community is composed of seven phyla of algae, whereas the Gan River is composed of six, the dominant phyla of phytoplankton being Bacillariophyta and Cryptophyta in Poyang Lake and Gan River, respectively. Phytoplankton abundance and primary productivity were significantly higher in Poyang Lake. Lower nitrogen (N) and phosphorous (P) concentrations and higher carbon (C) and silicon (Si) concentrations significantly affected the phytoplankton communities and primary productivity distribution in the entire Poyang Lake Basin. In this regard, we found a significant correlation between the phytoplankton community of the Gan River and P and N, whereas N and Si primarily regulated the phytoplankton community structure of Poyang Lake. Moreover, we found a significant correlation between DTN, Si/P, DIC/P, and primary productivity in the Gan River, whereas NH4+ jointly controlled primary productivity in Poyang Lake. Furthermore, the Margalef Richness Index (0.84-2.41) can be indicative of the environmental water quality status; and we determined that the most area of Poyang Lake and Gan River both were P restriction and moderately polluted, whereas the entrance of the Gan River into Poyang Lake was seriously polluted, which confirms that the Gan River is a main and crucial source of Poyang Lake pollution. Nanjishan Nature Reserve was already slightly eutrophic due to the high nutrient content and a large number of algae in the south-east of Poyang Lake, but the Gan River had good river fluidity, so some areas of the Gan River were oligotrophic.
Keywordnutrient phytoplankton community Poyang Lake primary productivity the Gan River
DOI10.1002/eco.2136
WOS KeywordWET DEPOSITION ; CHLOROPHYLL ; PATTERNS ; MECHANISM ; NITROGEN ; QUALITY ; SILICON ; SUMMER ; DOM
Indexed BySCI
Language英语
Funding ProjectNational Nature Science Foundation of China[41871080] ; National Key Research Program of China[2016YFC0500202]
Funding OrganizationNational Nature Science Foundation of China ; National Key Research Program of China
WOS Research AreaEnvironmental Sciences & Ecology ; Water Resources
WOS SubjectEcology ; Environmental Sciences ; Water Resources
WOS IDWOS:000478187700001
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/58091
Collection中国科学院地理科学与资源研究所
Corresponding AuthorGao, Yang
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
3.Beijing Normal Univ, Sch Environm, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Jia, Junjie,Gao, Yang,Song, Xianwei,et al. Characteristics of phytoplankton community and water net primary productivity response to the nutrient status of the Poyang Lake and Gan River, China[J]. ECOHYDROLOGY,2019:15.
APA Jia, Junjie,Gao, Yang,Song, Xianwei,&Chen, Shibo.(2019).Characteristics of phytoplankton community and water net primary productivity response to the nutrient status of the Poyang Lake and Gan River, China.ECOHYDROLOGY,15.
MLA Jia, Junjie,et al."Characteristics of phytoplankton community and water net primary productivity response to the nutrient status of the Poyang Lake and Gan River, China".ECOHYDROLOGY (2019):15.
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