Effect of a glyphosate formulation on freshwater plankton: A community combined metric approach

Aim: The aim of this study was to experimentally assess the effects of glyphosate formulation on plankton composition by using different community parameters through a mesocosm experiment. Methodology: A 600 l mesocosm experiment was performed for 7 days, including a control (without glyphosate) and two concentrations of glyphosate. Results: Glyphosate caused a significant decrease in cladoceran density and a significant increase in rotifer, Chlorophyceae, and Euglenophyceae densities. In addition, zooplankton size diversity as well as microalgal evenness diminished. Interpretation: The decrease in cladoceran density may have benefited rotifers since they are less competitive for food resources. Moreover, the decrease in cladoceran foraging pressure over Chlorophyceae and Euglenophyceae may have benefited them. The different tolerances and competitiveness within the plankton components make the structure of this community a good indicator of environmental disturbance.

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Increasing zooplankton size diversity enhances the strength of top-down control on phytoplankton through diet niche partitioning

Journal of Animal Ecology ◽

10.1111/1365-2656.12067 ◽

2013 ◽

Vol 82 (5) ◽

pp. 1052-1061 ◽

Cited By ~ 41

Author(s):

Lin Ye ◽

Chun-Yi Chang ◽

Carmen García-Comas ◽

Gwo-Ching Gong ◽

Chih-hao Hsieh

Keyword(s):

Niche Partitioning ◽

Top Down ◽

Zooplankton Size ◽

Size Diversity

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Earthworms Reduce the Abundance of Nematodes and Enchytraeids in a Soil Mesocosm Experiment Despite Abundant Food Resources

Soil Science Society of America Journal ◽

10.2136/sssaj2011.0035 ◽

2011 ◽

Vol 75 (5) ◽

pp. 1774-1778 ◽

Cited By ~ 5

Author(s):

Jun Tao ◽

Yingjun Xu ◽

Bryan S. Griffiths ◽

Feng Hu ◽

Xiaoyun Chen ◽

...

Keyword(s):

Food Resources ◽

Mesocosm Experiment ◽

Abundant Food

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The Impact of Eskoba®, a Glyphosate Formulation, on the Freshwater Plankton Community

Water Environment Research ◽

10.2175/106143014x13896437493580 ◽

2014 ◽

Vol 86 (12) ◽

pp. 2294-2300 ◽

Cited By ~ 11

Author(s):

U. Reno ◽

M.F. Gutierrez ◽

L. Regaldo ◽

A.M. Gagneten

Keyword(s):

Plankton Community ◽

Glyphosate Formulation ◽

Freshwater Plankton ◽

The Impact

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Insecticide (Carbaryl, 1-napthyl-N-methylcarbamate) effects on a freshwater plankton community: Zooplankton size, biomass, and algal abundance

Water Air & Soil Pollution ◽

10.1007/bf00479585 ◽

1995 ◽

Vol 84 (1-2) ◽

pp. 1-10 ◽

Cited By ~ 26

Author(s):

K. E. Havens

Keyword(s):

Plankton Community ◽

Zooplankton Size ◽

Algal Abundance ◽

Freshwater Plankton

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Zooplankton Size Structure in Relation to Environmental Factors in the Xiangxi Bay of Three Gorges Reservoir, China

10.21203/rs.3.rs-296013/v1 ◽

2021 ◽

Author(s):

Haoran Li ◽

Yuan Gu ◽

Qinghua Cai ◽

Xiaowei Dong ◽

Lin Ye

Keyword(s):

Environmental Factors ◽

Environmental Monitoring ◽

Community Composition ◽

Three Gorges Reservoir ◽

Size Structure ◽

Zooplankton Abundance ◽

Three Gorges ◽

Zooplankton Size ◽

Xiangxi Bay ◽

Size Diversity

Abstract Body size is sensitive to environmental changes and recognized as one of the fundamental traits linking ecological functions. Recently, size structure has been suggested as a useful indicator for environmental monitoring and assessment in aquatic ecosystems. However, the organisms’ size structure and the relationship with environmental factors remain seldom addressed in reservoir ecosystems. In this study, firstly, we investigated the zooplankton community composition and size structure, including the slope of the normalized biomass size spectrum (NBSS) and size diversity in the Xiangxi Bay of Three Gorges Reservoir, China. Then we analyzed how the environmental factors affect the zooplankton abundance and size structure (NBSS slope and size diversity) by using the structural equation model (SEM). In terms of the community composition, rotifers were the predominant zooplankton group in the Xiangxi bay during the whole research period, which abundance is significantly higher than protozoan, cladoceran, and copepod (Mann-Whitney U tests, P < 0.001). For the size structure, both the slope of NBSS and size diversity showed high spatiotemporal dynamics. The slope of NBSS ranged from − 2.201 to -0.097, and the size diversity ranged from 0.631 to 3.291. And lowest values of NBSS slope and size diversity were observed in the upstream areas of Xiangxi Bay. Further analyses based on SEMs found a clear pathway revealing how nutrient variables affect the zooplankton abundance and size structure. That is, dissolved inorganic nitrogen had an indirect effect on the zooplankton abundance, NBSS slope, and size diversity by affecting the phytoplankton biomass. In addition, SEM found that water temperature had a significant negative effect on the size diversity but had nonsignificant effects on zooplankton abundance and NBSS slope. This finding suggests that size diversity is a useful index in measuring the zooplankton size structure. Our study highlights that size diversity is a robust indicator for environmental monitoring and assessment, especially in complex and dynamic reservoir ecosystems.

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