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Environmental Factors Affecting Freshwater Snail Intermediate Hosts in Shenzhen and Adjacent Region, South China

Sound knowledge of the local distribution and diversity of freshwater snail intermediate hosts and the factors driving the occurrence and abundance of them is crucial to understanding snail-borne parasitic disease transmission and to setting up effective interventions in endemic areas. In this study...

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Autores principales: Min, Fengyang, Wang, Jiasheng, Liu, Xiaoguang, Yuan, Yi, Guo, Yunhai, Zhu, Kongxian, Chai, Zhaohui, Zhang, Yunchao, Li, Shizhu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9782201/
https://www.ncbi.nlm.nih.gov/pubmed/36548681
http://dx.doi.org/10.3390/tropicalmed7120426
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author Min, Fengyang
Wang, Jiasheng
Liu, Xiaoguang
Yuan, Yi
Guo, Yunhai
Zhu, Kongxian
Chai, Zhaohui
Zhang, Yunchao
Li, Shizhu
author_facet Min, Fengyang
Wang, Jiasheng
Liu, Xiaoguang
Yuan, Yi
Guo, Yunhai
Zhu, Kongxian
Chai, Zhaohui
Zhang, Yunchao
Li, Shizhu
author_sort Min, Fengyang
collection PubMed
description Sound knowledge of the local distribution and diversity of freshwater snail intermediate hosts and the factors driving the occurrence and abundance of them is crucial to understanding snail-borne parasitic disease transmission and to setting up effective interventions in endemic areas. In this study, we investigated the freshwater snails, water quality parameters, physical characteristics of habitats, predators and competitors, and human activity variables at 102 sites during December 2018 and August 2019 in Shenzhen and adjacent areas in China. We used decision tree models and canonical correspondence analysis to identify the main environmental and biotic factors affecting the occurrence and abundance of snail species. A total of nine species of snail were collected throughout the study area, with Biomphalaria straminea, Sinotaia quadrata, and Physella acuta being the most predominant species. Our study showed that the most important variables affecting the abundance and occurrence of snail species were the presence of predators and competitors, macrophyte cover, chlorophyll-a, substrate type, river depth, and water velocity. In terms of human activities, snail species occurred more frequently and in larger numbers in water bodies affected by human disturbances, especially for sewage discharge, which may reduce the occurrence and abundance of snail predators and competitors. These findings suggest that proper management of water bodies to reduce water pollution may increase the abundance of snail predators and competitors, and should be considered in integrated snail control strategies in the study area.
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spelling pubmed-97822012022-12-24 Environmental Factors Affecting Freshwater Snail Intermediate Hosts in Shenzhen and Adjacent Region, South China Min, Fengyang Wang, Jiasheng Liu, Xiaoguang Yuan, Yi Guo, Yunhai Zhu, Kongxian Chai, Zhaohui Zhang, Yunchao Li, Shizhu Trop Med Infect Dis Article Sound knowledge of the local distribution and diversity of freshwater snail intermediate hosts and the factors driving the occurrence and abundance of them is crucial to understanding snail-borne parasitic disease transmission and to setting up effective interventions in endemic areas. In this study, we investigated the freshwater snails, water quality parameters, physical characteristics of habitats, predators and competitors, and human activity variables at 102 sites during December 2018 and August 2019 in Shenzhen and adjacent areas in China. We used decision tree models and canonical correspondence analysis to identify the main environmental and biotic factors affecting the occurrence and abundance of snail species. A total of nine species of snail were collected throughout the study area, with Biomphalaria straminea, Sinotaia quadrata, and Physella acuta being the most predominant species. Our study showed that the most important variables affecting the abundance and occurrence of snail species were the presence of predators and competitors, macrophyte cover, chlorophyll-a, substrate type, river depth, and water velocity. In terms of human activities, snail species occurred more frequently and in larger numbers in water bodies affected by human disturbances, especially for sewage discharge, which may reduce the occurrence and abundance of snail predators and competitors. These findings suggest that proper management of water bodies to reduce water pollution may increase the abundance of snail predators and competitors, and should be considered in integrated snail control strategies in the study area. MDPI 2022-12-09 /pmc/articles/PMC9782201/ /pubmed/36548681 http://dx.doi.org/10.3390/tropicalmed7120426 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Min, Fengyang
Wang, Jiasheng
Liu, Xiaoguang
Yuan, Yi
Guo, Yunhai
Zhu, Kongxian
Chai, Zhaohui
Zhang, Yunchao
Li, Shizhu
Environmental Factors Affecting Freshwater Snail Intermediate Hosts in Shenzhen and Adjacent Region, South China
title Environmental Factors Affecting Freshwater Snail Intermediate Hosts in Shenzhen and Adjacent Region, South China
title_full Environmental Factors Affecting Freshwater Snail Intermediate Hosts in Shenzhen and Adjacent Region, South China
title_fullStr Environmental Factors Affecting Freshwater Snail Intermediate Hosts in Shenzhen and Adjacent Region, South China
title_full_unstemmed Environmental Factors Affecting Freshwater Snail Intermediate Hosts in Shenzhen and Adjacent Region, South China
title_short Environmental Factors Affecting Freshwater Snail Intermediate Hosts in Shenzhen and Adjacent Region, South China
title_sort environmental factors affecting freshwater snail intermediate hosts in shenzhen and adjacent region, south china
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9782201/
https://www.ncbi.nlm.nih.gov/pubmed/36548681
http://dx.doi.org/10.3390/tropicalmed7120426
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