Issue |
Knowl. Manag. Aquat. Ecosyst.
Number 423, 2022
Topical Issue on Fish Ecology
|
|
---|---|---|
Article Number | 11 | |
Number of page(s) | 8 | |
DOI | https://doi.org/10.1051/kmae/2022009 | |
Published online | 20 May 2022 |
Research Paper
Effects of Nile Tilapia (Oreochromis niloticus) on phytoplankton community structure and water quality: a short-term mesocosm study
1
Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
2
Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou, China
3
College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
4
State Scientific and Production Amalgamation Scientific-Practical Center of the National Academy of Sciences of Belarus for Biological Resources, Minsk, Belarus
5
Department of Fish and Zooplankton Ecology of the Institute of Hydrobiology, Biology Centre of the Czech Academy of Sciences of the Czech Republic, České Budějovice, Czech Republic
6
Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
7
Department STEBICEF, University of Palermo, 90133 Palermo, Italy
8
Sino-Danish Centre for Education and Research (SDC), Beijing 100070, China
9
State Key Laboratory of Lake Science and Environment, Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
10
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
* Corresponding author: cftong@sklec.ecnu.edu.cn; wetlandxfz@163.com
Received:
14
November
2021
Accepted:
12
March
2022
Nile tilapia is a highly invasive fish species, deliberately introduced into many lakes and reservoirs worldwide, sometimes resulting in significant ecosystem alterations. A short-term mesocosm experiment with and without Nile tilapia (Oreochromis niloticus) was designed to test the hypotheses that the presence of tilapia may affect phytoplankton community structure, increase nutrients availability in water column and deteriorate water quality. Nutrients, total suspended solids (TSS) and biomass of phytoplankton in different size classes (as Chl a) were measured. We found that tilapia increased the total nitrogen (TN), total dissolved nitrogen (TDN), NH4 + and TSS concentrations, deteriorating the water quality. In addition, under tilapia presence, the biomass of phytoplankton, as well as that of micro- and nano-phytoplankton, increased leading to a change in the structure of the phytoplankton assemblage. Moreover, a reduction in the biomass of periphyton was observed. Omnivorous tilapia is often dominant in tropical and subtropical waters, and removal of this fish may represent an effective management tool to improve the water quality.
Key words: Tilapia / nutrient / phytoplankton community / periphytic algae / water quality
© L. Zhang et al., Published by EDP Sciences 2022
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