Next Article in Journal
Sandbar Breakwater: An Innovative Nature-Based Port Solution
Next Article in Special Issue
Formation of Soil Chemical Environment in Coastal Pinus thunbergii Parlatore Forest in Southwestern Japan
Previous Article in Journal
Hydrochemical Characteristic of Groundwater and Its Impact on Crop Yields in the Baojixia Irrigation Area, China
Previous Article in Special Issue
Heterogeneity and Anthropogenic Impacts on a Small Lowland Stream
Open AccessArticle

Effects of Crucian Carp (Carassius auratus) on Water Quality in Aquatic Ecosystems: An Experimental Mesocosm Study

1
Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
2
College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
3
Department of Natural Resources, Cornell Biological Field Station, Cornell University, New York, NY 13030, USA
4
Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
5
Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
6
Department of Bioscience, Aarhus University, DK-8600 Silkeborg, Denmark
7
Sino-Danish Centre for Education and Research (SDC), Beijing 100070, China
8
Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Ankara 06800, Turkey
9
State Key Laboratory of Lake Science and Environment, Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Water 2020, 12(5), 1444; https://doi.org/10.3390/w12051444
Received: 13 February 2020 / Revised: 12 May 2020 / Accepted: 12 May 2020 / Published: 19 May 2020
The presence of omnivorous fish is known to affect aquatic ecosystems, including water quality. The effect, however, depends on the species in question, and our knowledge is limited on the effect of omnivorous crucian carp (Carassius auratus), a common and often the most numerous fish species in eutrophic shallow lakes in China. We conducted a 70-day outdoor experiment in mesocosms with and without crucian carp to examine whether this species adversely affects water quality by increasing the levels of total nitrogen (TN) and total phosphorus (TP), thereby stimulating the biomass of phytoplankton and increasing water turbidity. Compared with carp-free controls, the presence of crucian carp resulted in higher TN and TP in the water column, greater phytoplankton biomass and lower periphyton biomass, measured as chlorophyll a. Total suspended solids (TSS) also increased in the presence of fish. We conclude that crucian carp can increase TN and TP, enhance phytoplankton biomass, and increase water turbidity, thereby contributing significantly to the deterioration of the water quality. In addition to controlling external nutrient loading, the removal of crucian carp may help to improve water quality in warm shallow eutrophic lakes. View Full-Text
Keywords: crucian carp; nutrient; phytoplankton; periphyton; sediment; water quality crucian carp; nutrient; phytoplankton; periphyton; sediment; water quality
Show Figures

Figure 1

MDPI and ACS Style

Huang, Y.; Mei, X.; Rudstam, L.G.; Taylor, W.D.; Urabe, J.; Jeppesen, E.; Liu, Z.; Zhang, X. Effects of Crucian Carp (Carassius auratus) on Water Quality in Aquatic Ecosystems: An Experimental Mesocosm Study. Water 2020, 12, 1444.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop