What physical habitat factors determine the distribution of gastropods in neotropical headwater streams?  

作　　者：Marden S.Linares Diego R.Macedo Rodrigo L.Massara Marcos Callisto 

机构地区：[1]Universidade Federal de Minas Gerais,Instituto de Ciencias Biologicas,Departamento de Genetica,Ecologia e Evoluçao,Laboratorio de Ecologia de Bentos,Av.Antonio Carlos 6627,Pampulha,CP 486,Belo Horizonte,MG,CEP 30270-901,Brazil [2]Universidade Federal de Minas Gerais,Instituto de Geociencias,Departamento de Geografia,Av.Antonio Carlos 6627,Pampulha,Belo Horizonte,MG,CEP 30270-901,Brazil [3]Universidade Federal de Minas Gerais,Instituto de Ciencias Biologicas,Departamento de Genetica,Ecologia e Evoluçao,Laboratorio de Ecologia e Conservaçao,Programa de Pos-graduaçao em Ecologia,Conservaçao e Manejo da Vida Silvestre,Av.Antonio Carlos 6627,Pampulha,CP 486,Belo Horizonte,MG,CEP 30270-901,Brazil [4]Instituto SerraDiCal de Pesquisa e Conservaçao,Rua Jose Hemeterio de Andrade,No.570,Buritis,Belo Horizonte,MG,CEP 30493-180,Brazil

出　　处：《Water Biology and Security》2022年第4期61-67,共7页水生生物与安全（英文）

基　　金：This research has been continually funded by Programa Peixe Vivo/Companhia Energetica de Minas Gerais,Programa de Pesquisa e Desenvolvimento Tecnologico do Setor de Energia Eletrica-Companhia Energetica de Minas Gerais(P&D Aneel-Cemig GT-487,GT-550,GT-599,and GT-611);by Fundaçao de Amparoa Pesquisa de Minas Gerais(APQ-01961-15);This study was financed in part by CAPES-Finance Code 001.MC was awarded National Council for Scientific&Technological Development(CNPq)research productivity grants(304060/2020-8);by Fundaçao de Amparoa Pesquisa do Estado de Minas Gerais research grant(PPM 00104-18).DRM received support from CNPq(309763/2020-7);The Coordenaçao de Aperfeiçoamento de Pessoal de Nível Superior-Brasil(CAPES)provided grants to RLM.The team of undergraduate and graduate students of the Laboratorio de Ecologia de Bentos/ICB-UFMG supported the field activities.

摘　　要：Freshwater gastropods play a pivotal role in the structure and functioning of freshwater ecosystems,but despite their importance,there are still gaps in their ecology.Our goal was to understand what physical habitat factors are the most important for the distribution of freshwater gastropods in headwater stream ecosystems in the Neotropical Savanna and provide a baseline for conservation and management efforts for freshwater gastropods in this biome.We identified five taxa,each with different environmental prefferences.Littoridina presence related negatively with stream slope,Biomphalaria presence related positively with total dissolved solids and the proportions of cobble,fine sediment and organic matter.Gundlachia presence correlated positively with elevation and the proportion of pools in the site.Physa presence related negatively with total dissolved solids and positively with alkalinity.Melanoides tuberculata presence correlated positively with the proportion of coarse gravel.Our results highlight the challenge for protecting native freshwater gastropod assemblages(and managing non-native invasive species),because environmental preferences vary widely amongst taxa and most are vulnerable to common anthropogenic disturbances.

关 键 词：Lotic ecosystems Alien species Water quality Freshwater gastropod conservation 

分 类 号：P73[天文地球—海洋科学]