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Macrophyte species strongly affects changes in C, N, and P stocks in shallow lakes after a regime shift from macrophyte to phytoplankton dominance
Wang, Hai Jun1; Wang, Hong Zhu1; Liang, Xiao Min1; Pan, Bao Zhu1,2; Kosten, Sarian3
2016
Source PublicationINLAND WATERS
ISSN2044-2041
Volume6Issue:3Pages:449-460
AbstractShallow lakes are important stocks of carbon (C), nitrogen (N), and phosphorus (P), yet little is known about the influence of alternative primary producer dominance on C stocks or the impact of different macrophyte species on the role of shallow lakes as elemental stocks. We used Yangtze shallow lakes dominated by a monsoon climate as a research site to test the hypothesis that changes in elemental stocks in the water column and sediment after a shift to a phytoplankton-dominated state depend on the macrophyte species originally present. We used a dual approach, combining multi-year monitoring and multi-lake comparisons of lakes that were, at least once, dominated either by fast-decomposing Potamogeton crispus or slow-decomposing P. maackianus. Elemental concentrations generally decreased in the water column and increased in sediment after a shift from P. maackianus presence to absence. Only a minor reallocation of elemental stocks was found in lakes where P. crispus disappeared. This difference is likely caused by a combination of the different biomass and decomposition rates between species, further illustrated by the amount of dead plant material in the sediment after loss of plants. After P. maackianus loss, plant material was found in the sediment in high amounts for up to 6 years, whereas after P. crispus loss the coarse material was absent in <1 year. Suspended and dissolved concentrations (i.e., the mobile pool) of C increased 1.5-1.9-fold and P increased 2.0-4.3-fold after the shift, whereas N tended to decrease or stay unchanged. Higher mobile pools of C and P after macrophytes loss implies a more vulnerable watershed, supporting higher phytoplankton biomass in the lakes and causing serious downstream eutrophication problems.
SubtypeArticle
KeywordAlternative States Decomposition Rates Elemental Stocks Potamogeton Crispus P. Maackianus Shallow Lakes
DOI10.5268/IW-6.3.837
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI ; ISTP
Language英语
WOS Research AreaMarine & Freshwater Biology
WOS SubjectLimnology ; Marine & Freshwater Biology
WOS KeywordCARBON BURIAL ; SUBMERSED MACROPHYTES ; PHOSPHORUS ; SEDIMENTS ; RATES ; EUTROPHICATION ; DECOMPOSITION ; RESERVOIRS ; CLIMATE ; FLORIDA
WOS IDWOS:000384067400017
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/28358
Collection淡水生态学研究中心
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan, Peoples R China
2.Changjiang River Sci Res Inst, Wuhan, Peoples R China
3.Radboud Univ Nijmegen, Inst Water & Wetland Res, Dept Aquat Ecol & Environm Biol, Nijmegen, Netherlands
Recommended Citation
GB/T 7714
Wang, Hai Jun,Wang, Hong Zhu,Liang, Xiao Min,et al. Macrophyte species strongly affects changes in C, N, and P stocks in shallow lakes after a regime shift from macrophyte to phytoplankton dominance[J]. INLAND WATERS,2016,6(3):449-460.
APA Wang, Hai Jun,Wang, Hong Zhu,Liang, Xiao Min,Pan, Bao Zhu,&Kosten, Sarian.(2016).Macrophyte species strongly affects changes in C, N, and P stocks in shallow lakes after a regime shift from macrophyte to phytoplankton dominance.INLAND WATERS,6(3),449-460.
MLA Wang, Hai Jun,et al."Macrophyte species strongly affects changes in C, N, and P stocks in shallow lakes after a regime shift from macrophyte to phytoplankton dominance".INLAND WATERS 6.3(2016):449-460.
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