Mesocosm experiment reveals a strong positive effect of snail presence on macrophyte growth, resulting from control of epiphyton and nuisance filamentous algae: Implications for shallow lake management

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Mesocosm experiment reveals a strong positive effect of snail presence on macrophyte growth, resulting from control of epiphyton and nuisance filamentous algae : Implications for shallow lake management. / Yang, Liu; He, Hu; Guan, Baohua; Yu, Jinlei; Yao, Zongbao; Zhen, Wei; Yin, Chunyu; Wang, Qianhong; Jeppesen, Erik; Liu, Zhengwen.

In: Science of the total Environment, Vol. 705, 135958, 2020.

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Yang, Liu ; He, Hu ; Guan, Baohua ; Yu, Jinlei ; Yao, Zongbao ; Zhen, Wei ; Yin, Chunyu ; Wang, Qianhong ; Jeppesen, Erik ; Liu, Zhengwen. / Mesocosm experiment reveals a strong positive effect of snail presence on macrophyte growth, resulting from control of epiphyton and nuisance filamentous algae : Implications for shallow lake management. In: Science of the total Environment. 2020 ; Vol. 705.

Bibtex

@article{084236d33c1242f399a864e972577bf2,
title = "Mesocosm experiment reveals a strong positive effect of snail presence on macrophyte growth, resulting from control of epiphyton and nuisance filamentous algae: Implications for shallow lake management",
abstract = "Increased nutrient loading has adverse effects on the growth of submerged macrophytes in eutrophic shallow lakes. Where growth of phytoplankton, epiphyton and filamentous algae is excessive, all may contribute to shading that limits macrophyte growth. However, when abundant, herbivorous snails may dampen this effect by reducing the biomass of epiphyton, and perhaps also of nuisance filamentous algae, both which have the potential to become more abundant in a future warmer world. We studied the effects of herbivorous snails (Radix swinhoei) on the biomass of phytoplankton, epiphyton and filamentous algae as well as the growth of the submerged macrophyte, Vallisneria denseserrulata, under contrasting nutrient loadings (low, nitrogen (N) 113 μg L− 1·d− 1 and phosphorus (P) 10 μg L− 1·d− 1; high, N 339 μg L− 1·d− 1 and P 30 μg L− 1·d− 1) in a 30 day outdoor mesocosm experiment, conducted on the shore of subtropical Lake Taihu, China. We found significant interactive effects of nutrient loading and snail presence on biomasses of epiphyton and filamentous algae and on the biomass and relative growth rate of submerged macrophytes. When snails were absent, the biomass of epiphyton and the biomass and coverage of filamentous algae all increased markedly, while the biomass, density and relative growth rate of V. denseserrulata decreased significantly with increased nutrient loading. When snails were present, biomasses of epiphyton, phytoplankton and filamentous algae were significantly reduced and growth of V. denseserrulata significantly increased under both high and low nutrient loading scenarios, and the effect was most pronounced in the nutrient-rich treatment. The present study suggests that in shallow aquatic ecosystems, herbivorous snails reduce the negative impact of nutrient loading on submerged macrophyte growth, by controlling both epiphyton and nuisance filamentous algae. How best to protect snails from fish predation in order to realize this potential under natural conditions is a matter that warrants further studies.",
keywords = "Epiphyton, Filamentous algae, Nutrient loading, Snail grazing, Submerged macrophyte",
author = "Liu Yang and Hu He and Baohua Guan and Jinlei Yu and Zongbao Yao and Wei Zhen and Chunyu Yin and Qianhong Wang and Erik Jeppesen and Zhengwen Liu",
year = "2020",
doi = "10.1016/j.scitotenv.2019.135958",
language = "English",
volume = "705",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Mesocosm experiment reveals a strong positive effect of snail presence on macrophyte growth, resulting from control of epiphyton and nuisance filamentous algae

T2 - Implications for shallow lake management

AU - Yang, Liu

AU - He, Hu

AU - Guan, Baohua

AU - Yu, Jinlei

AU - Yao, Zongbao

AU - Zhen, Wei

AU - Yin, Chunyu

AU - Wang, Qianhong

AU - Jeppesen, Erik

AU - Liu, Zhengwen

PY - 2020

Y1 - 2020

N2 - Increased nutrient loading has adverse effects on the growth of submerged macrophytes in eutrophic shallow lakes. Where growth of phytoplankton, epiphyton and filamentous algae is excessive, all may contribute to shading that limits macrophyte growth. However, when abundant, herbivorous snails may dampen this effect by reducing the biomass of epiphyton, and perhaps also of nuisance filamentous algae, both which have the potential to become more abundant in a future warmer world. We studied the effects of herbivorous snails (Radix swinhoei) on the biomass of phytoplankton, epiphyton and filamentous algae as well as the growth of the submerged macrophyte, Vallisneria denseserrulata, under contrasting nutrient loadings (low, nitrogen (N) 113 μg L− 1·d− 1 and phosphorus (P) 10 μg L− 1·d− 1; high, N 339 μg L− 1·d− 1 and P 30 μg L− 1·d− 1) in a 30 day outdoor mesocosm experiment, conducted on the shore of subtropical Lake Taihu, China. We found significant interactive effects of nutrient loading and snail presence on biomasses of epiphyton and filamentous algae and on the biomass and relative growth rate of submerged macrophytes. When snails were absent, the biomass of epiphyton and the biomass and coverage of filamentous algae all increased markedly, while the biomass, density and relative growth rate of V. denseserrulata decreased significantly with increased nutrient loading. When snails were present, biomasses of epiphyton, phytoplankton and filamentous algae were significantly reduced and growth of V. denseserrulata significantly increased under both high and low nutrient loading scenarios, and the effect was most pronounced in the nutrient-rich treatment. The present study suggests that in shallow aquatic ecosystems, herbivorous snails reduce the negative impact of nutrient loading on submerged macrophyte growth, by controlling both epiphyton and nuisance filamentous algae. How best to protect snails from fish predation in order to realize this potential under natural conditions is a matter that warrants further studies.

AB - Increased nutrient loading has adverse effects on the growth of submerged macrophytes in eutrophic shallow lakes. Where growth of phytoplankton, epiphyton and filamentous algae is excessive, all may contribute to shading that limits macrophyte growth. However, when abundant, herbivorous snails may dampen this effect by reducing the biomass of epiphyton, and perhaps also of nuisance filamentous algae, both which have the potential to become more abundant in a future warmer world. We studied the effects of herbivorous snails (Radix swinhoei) on the biomass of phytoplankton, epiphyton and filamentous algae as well as the growth of the submerged macrophyte, Vallisneria denseserrulata, under contrasting nutrient loadings (low, nitrogen (N) 113 μg L− 1·d− 1 and phosphorus (P) 10 μg L− 1·d− 1; high, N 339 μg L− 1·d− 1 and P 30 μg L− 1·d− 1) in a 30 day outdoor mesocosm experiment, conducted on the shore of subtropical Lake Taihu, China. We found significant interactive effects of nutrient loading and snail presence on biomasses of epiphyton and filamentous algae and on the biomass and relative growth rate of submerged macrophytes. When snails were absent, the biomass of epiphyton and the biomass and coverage of filamentous algae all increased markedly, while the biomass, density and relative growth rate of V. denseserrulata decreased significantly with increased nutrient loading. When snails were present, biomasses of epiphyton, phytoplankton and filamentous algae were significantly reduced and growth of V. denseserrulata significantly increased under both high and low nutrient loading scenarios, and the effect was most pronounced in the nutrient-rich treatment. The present study suggests that in shallow aquatic ecosystems, herbivorous snails reduce the negative impact of nutrient loading on submerged macrophyte growth, by controlling both epiphyton and nuisance filamentous algae. How best to protect snails from fish predation in order to realize this potential under natural conditions is a matter that warrants further studies.

KW - Epiphyton

KW - Filamentous algae

KW - Nutrient loading

KW - Snail grazing

KW - Submerged macrophyte

UR - http://www.scopus.com/inward/record.url?scp=85076113049&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2019.135958

DO - 10.1016/j.scitotenv.2019.135958

M3 - Journal article

C2 - 31838421

AN - SCOPUS:85076113049

VL - 705

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

M1 - 135958

ER -