Aarhus University Seal / Aarhus Universitets segl

Erik Jeppesen

Restoration of Shallow Lakes in Subtropical and Tropical China: Response of Nutrients and Water Clarity to Biomanipulation by Fish Removal and Submerged Plant Transplantation

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

DOI

  • Jinlei Yu, Chinese Acad Sci, Chinese Academy of Sciences, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm
  • ,
  • Zhengwen Liu, Chinese Acad Sci, Chinese Academy of Sciences, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Jinan Univ, Jinan University, Dept Ecol, Jinan Univ, Chinese Academy of Sciences, Jinan University, Inst Hydrobiol, Univ Chinese Acad Sci, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Sino Danish Ctr Educ & Res SDC
  • ,
  • Kuanyi Li, Chinese Acad Sci, Chinese Academy of Sciences, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm
  • ,
  • Feizhou Chen, Chinese Acad Sci, Chinese Academy of Sciences, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol
  • ,
  • Baohua Guan, Chinese Acad Sci, Chinese Academy of Sciences, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm
  • ,
  • Yaohui Hu, Chinese Acad Sci, Chinese Academy of Sciences, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol
  • ,
  • Ping Zhong, Jinan Univ, Jinan University, Dept Ecol, Jinan Univ, Chinese Academy of Sciences, Jinan University, Inst Hydrobiol
  • ,
  • Yali Tang, Jinan Univ, Chinese Academy of Sciences, Jinan University, Inst Hydrobiol
  • ,
  • Xuefeng Zhao, Beisun Environm Technol Co
  • ,
  • Hu He, Chinese Acad Sci, Chinese Academy of Sciences, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm
  • ,
  • Haiyi Zeng, Jinan Univ, Chinese Academy of Sciences, Jinan University, Inst Hydrobiol
  • ,
  • Erik Jeppesen

Fish removal has been used to restore temperate lakes, and positive effects on ecological state and water clarity have frequently been recorded in many lakes. Recently, a supplementary measure, transplantation of submerged macrophytes after fish removal, has been applied to restore warm Chinese shallow lakes in order to compensate for the expected lack of increasing grazing control of phytoplankton after the biomanipulation. These measures have successfully shifted turbid warm lakes to a clear water state, but little is known about the responses to restoration of key physico-chemical variables. We analyzed the seasonal variation in nutrient concentrations in two subtropical and one tropical biomanipulated shallow Chinese lakes subjected to restoration. In all three lakes, a marked decline occurred in the concentrations of lake total nitrogen (TN), total phosphorus (TP), total suspended solids (TSS), and chlorophyll a (Chl a), while the transparency (SD: WD ratio, Secchi depth to water depth ratio) increased. A clear water state was established, lasting so far for 7 to 23 months, and TN, TP, Chl a, and TSS levels in the three restored lakes decreased to, on average, 49%, 58%, 41%, and 18% of the level prior to restoration and/or the level in a reference lake, respectively, while the annual mean SD: WD ratio exhibited a 1.5-4 fold increase. In conclusion, lake restoration by transplantation of submerged macrophytes after fish removal had major positive effects on the physico-chemical variables in our study lakes. However, continuous control of omnivorous and herbivorous fish biomass is recommended as the fish typically present in warm, shallow lakes to some extent feed on submerged macrophytes, when available.

Original languageEnglish
Article number438
JournalWater
Volume8
Issue10
Number of pages13
ISSN2073-4441
DOIs
Publication statusPublished - Oct 2016

    Research areas

  • biomanipulation, subtropical, tropical, Chinese shallow lakes, nutrients, TSS, transparency, PIKE ESOX-LUCIUS, EUTROPHIC LAKE, ENCLOSURE EXPERIMENT, COMMUNITY STRUCTURE, SPECIES RICHNESS, DANISH LAKES, MACROPHYTES, CLIMATE, SIZE, RESUSPENSION

See relations at Aarhus University Citationformats

ID: 107807437