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Int. J. Environ. Res. Public Health 2016, 13(9), 855; doi:10.3390/ijerph13090855

The Relationship between Phytoplankton Evenness and Copepod Abundance in Lake Nansihu, China

Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China
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Academic Editor: Miklas Scholz
Received: 12 May 2016 / Revised: 21 August 2016 / Accepted: 22 August 2016 / Published: 31 August 2016
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Abstract

The relationship between biodiversity and ecosystem functioning is a central issue in ecology. Previous studies have shown that producer diversity can impact the consumer community via predator-prey interactions. However, direct observations of this relationship remain rare, in particular for aquatic ecosystems. In this research, the relationship between phytoplankton diversity (species richness and evenness) and the abundance of copepods was analyzed in Lake Nansihu, a meso-eutrophic lake in China. The results showed that copepods abundance was significantly decreased with increasing phytoplankton evenness throughout the year. However, both species richness and phytoplankton biomass showed no significant relationship with the abundance of copepods. Canonical correspondence analysis revealed that phytoplankton evenness was negatively correlated with Thermocyclops kawamurai, Cyclops vicinus, Eucyclops serrulatus, Mesocyclops leuckarti, Sinocalanus tenellus, Sinocalanus dorrii, Copepods nauplius, but positively correlated with many Cyanophyta species (Chroococcus minutus, Dactylococcopsis acicularis, Microcystis incerta, Merismopedia tenuissima, Merismopedia sinica and Lyngbya limnetica). Based on our results, phytoplankton evenness was a better predictor of copepods abundance in meso-eutrophic lakes. These results provide new insights into the relationship between diversity and ecosystem functioning in aquatic ecosystems. View Full-Text
Keywords: phytoplankton biomass; species richness; evenness; copepod abundance; ecosystem functioning phytoplankton biomass; species richness; evenness; copepod abundance; ecosystem functioning
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Tian, W.; Zhang, H.; Zhao, L.; Xu, X.; Huang, H. The Relationship between Phytoplankton Evenness and Copepod Abundance in Lake Nansihu, China. Int. J. Environ. Res. Public Health 2016, 13, 855.

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