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Diatom community succession in the recent history of a eutrophic Yunnan Plateau lake, Lake Dianchi, in subtropical China
Gong, Zhi-jun1; Li, Yan-ling1; Shen, Ji1; Xie, Ping2; Li, YL, Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China
2009-12-01
Source PublicationLIMNOLOGY
ISSN1439-8621
Volume10Issue:3Pages:247-253
AbstractFish introduction, eutrophication and disappearance of aquatic vegetation are important disturbances of aquatic ecosystems, especially in plateau lakes, which are generally considered to be very vulnerable. Fish were introduced to Lake Dianchi, a eutrophic plateau lake in southwest China, in the late 1950s and 1970s. After the introduction, invasive fish became the dominant species, and the total fish yield increased. Meanwhile, the trophic level of Lake Dianchi had a tendency to increase in the past decades because of the increases in human activities in the watershed area. In addition, the area of aquatic vegetation decreased from more than 90 to 1.8% of the lake area from the 1950s to 2000. This study investigated the effects of fish introduction, eutrophication and aquatic vegetation on the diatom community of Lake Dianchi by examining the changes of microfossil diatom assemblage and abundance. Results showed that the absolute abundance and diatom assemblages changed after fish were introduced. The endemic species, Cyclotella rohomboideo-elliptica, disappeared with the introduction of fish and increasing trophic levels after 1958. Fragilaria crotonensis entered into the lake with the introduction of fish and gradually thrived in the lake after 1958. Diatom species numbers also decreased gradually from 21 to 9 from the past to present. Epiphytic diatoms disappeared with the decrease of aquatic vegetation after 1985. Our study indicated that eutrophication was the most important process determining diatom abundance, and fish introduction was a secondary process determining diatom abundance, while aquatic vegetation had a more important role in structuring the diatom community in this eutrophic plateau lake.; Fish introduction, eutrophication and disappearance of aquatic vegetation are important disturbances of aquatic ecosystems, especially in plateau lakes, which are generally considered to be very vulnerable. Fish were introduced to Lake Dianchi, a eutrophic plateau lake in southwest China, in the late 1950s and 1970s. After the introduction, invasive fish became the dominant species, and the total fish yield increased. Meanwhile, the trophic level of Lake Dianchi had a tendency to increase in the past decades because of the increases in human activities in the watershed area. In addition, the area of aquatic vegetation decreased from more than 90 to 1.8% of the lake area from the 1950s to 2000. This study investigated the effects of fish introduction, eutrophication and aquatic vegetation on the diatom community of Lake Dianchi by examining the changes of microfossil diatom assemblage and abundance. Results showed that the absolute abundance and diatom assemblages changed after fish were introduced. The endemic species, Cyclotella rohomboideo-elliptica, disappeared with the introduction of fish and increasing trophic levels after 1958. Fragilaria crotonensis entered into the lake with the introduction of fish and gradually thrived in the lake after 1958. Diatom species numbers also decreased gradually from 21 to 9 from the past to present. Epiphytic diatoms disappeared with the decrease of aquatic vegetation after 1985. Our study indicated that eutrophication was the most important process determining diatom abundance, and fish introduction was a secondary process determining diatom abundance, while aquatic vegetation had a more important role in structuring the diatom community in this eutrophic plateau lake.
SubtypeArticle
KeywordLake Dianchi Fish Introduction Eutrophication Aquatic Vegetation Diatom Microfossil
Department[Gong, Zhi-jun; Li, Yan-ling; Shen, Ji] Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China; [Xie, Ping] Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Peoples R China
Subject AreaLimnology
DOI10.1007/s10201-009-0282-8
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationNational Basic Research Program of China [2008CB418103]; National Sciences and Foundation of China [40602039, 40401064, 40702029]; CAS [KZCX1-YW-14] ; National Basic Research Program of China [2008CB418103]; National Sciences and Foundation of China [40602039, 40401064, 40702029]; CAS [KZCX1-YW-14] ; National Basic Research Program of China [2008CB418103]; National Sciences and Foundation of China [40602039, 40401064, 40702029]; CAS [KZCX1-YW-14] ; National Basic Research Program of China [2008CB418103]; National Sciences and Foundation of China [40602039, 40401064, 40702029]; CAS [KZCX1-YW-14]
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology
WOS SubjectLimnology
WOS IDWOS:000271203800010
WOS KeywordSHALLOW LAKES ; SUBMERGED MACROPHYTES ; TOTAL PHOSPHORUS ; PHYTOPLANKTON ; ASSEMBLAGES ; IMPACT ; CARP
Funding OrganizationNational Basic Research Program of China [2008CB418103]; National Sciences and Foundation of China [40602039, 40401064, 40702029]; CAS [KZCX1-YW-14] ; National Basic Research Program of China [2008CB418103]; National Sciences and Foundation of China [40602039, 40401064, 40702029]; CAS [KZCX1-YW-14] ; National Basic Research Program of China [2008CB418103]; National Sciences and Foundation of China [40602039, 40401064, 40702029]; CAS [KZCX1-YW-14] ; National Basic Research Program of China [2008CB418103]; National Sciences and Foundation of China [40602039, 40401064, 40702029]; CAS [KZCX1-YW-14]
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/7532
Collection期刊论文
Corresponding AuthorLi, YL, Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China
Affiliation1.Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Gong, Zhi-jun,Li, Yan-ling,Shen, Ji,et al. Diatom community succession in the recent history of a eutrophic Yunnan Plateau lake, Lake Dianchi, in subtropical China[J]. LIMNOLOGY,2009,10(3):247-253.
APA Gong, Zhi-jun,Li, Yan-ling,Shen, Ji,Xie, Ping,&Li, YL, Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China.(2009).Diatom community succession in the recent history of a eutrophic Yunnan Plateau lake, Lake Dianchi, in subtropical China.LIMNOLOGY,10(3),247-253.
MLA Gong, Zhi-jun,et al."Diatom community succession in the recent history of a eutrophic Yunnan Plateau lake, Lake Dianchi, in subtropical China".LIMNOLOGY 10.3(2009):247-253.
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