alexa The Response of Macrophytes to Nutrients and Implicatio
ISSN: 2375-4397

Journal of Pollution Effects & Control
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Research Article

The Response of Macrophytes to Nutrients and Implications for the Control of Phytoplankton Blooms in East Taihu Lake, China

Liu Guo-feng1,2,3, Zhang lu3, Fan Cheng-xin3, Han Shi-qun2*, He Jun4, Hans W. Paerl5
1Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences, Wuxi, 214081, China
2Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China
3State Key Laboratory of Lake and Environment, Nanjing Institute of Geography & Limnology, CAS, Nanjing 210008, China
4Fisheries Technical Guidance Station of Wuxi Municipal Bureau of Agriculture, Forestry, Wuxi 214023, China
5Institute of Marine Sciences, University of North Carolina, USA
Corresponding Author : Han Shi-qun
Institute of Agricultural Resource and Environment
Jiangsu Academy of Agricultural Science. Nanjing 210014, China
Tel: +86-25-84390241
E-mail: [email protected]
Received February 18, 2014; Accepted July 30, 2014; Published August 12,2014
Citation: Guo-feng L, Zhang lu, Cheng-xin F, Shi-qun H, Jun H, et al. (2014) The Response of Macrophytes to Nutrients and Implications for the Control of Phytoplankton Blooms in East Taihu Lake, China. J Pollut Eff Cont 2:113. doi: 10.4172/2375-4397.1000113
Copyright: © 2014 Han Shi-qun, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

When macrophytes are growing in the eutrophicated aquatic ecosystem, the vegetation induces important effects to the water quality and phytoplankton concentrations in the water which affected by macroscopic physical, chemical and biological processes and the effects are the results of direct and indirect interactions of the aquatic plants and water body. The interactions between macrophytes, nutrients and phytoplankton blooms were examined in the water and sediments of a shallow, eutrophic and typical East Taihu, China. The importance of macrophytes as a sink for nutrients, and the inhibitory effect of macrophytes on phytoplankton bloom potential were assessed through three different seasons. Luxuriant aquatic plants growth in this system led to decrease available nutrients for phytoplankton and prevented bloom development. Uptake of N and P by aquatic plants accounted for a major portion of the observed N and P loss from the water column and sediments. Luxury uptake of N and P were indicated by high biomass and tissues N and P concentrations, indicating the capacity of macrophytes to act as a nutrient sink in midsummer. Dissolved inorganic N (DIN) and soluble reactive phosphorous (SRP) in water were reduced in midsummer in the presence of macrophytes. The use of macrophytes to reduce the nutrients in water system and thereby inhibit freshwater phytoplankton blooms should be considered as an effective management strategy in shallow eutrophicated lakes. As aquatic macrophytes also develops considerable indirect effects that could have a vital impact than the direct uptake the nutrients into the plant biomass.

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