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Variability in mentum deformities of Tanytarsus larvae(Diptera,Chironomidae)in a metal rich basin in Northern Mexico

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Water Biology and Security 2022年第2期1卷 1-9页

作者： Orestes Carlos Bello-Gonzalez Perla Alonso-EguíaLis Cesar Arturo Ilizaliturri Hernandez Norman Mercado-Silva Centro de Investigacion en Biodiversidad y Conservacion Universidad Autonoma del Estado de MorelosCuernavacaMorelosMexico Instituto Mexicano de Tecnología del Agua JiutepecMorelosMexico Facultad de Medicina-Centro de Investigacion Aplicada en Ambiente y Salud Universidad Autonoma de San Luis PotosíCoordinacion para la Aplicacion de la Ciencia y la Tecnología-(CIACyT-CIAAS)San Luis PotosíMexico

Mentum deformities in chironomids have been commonly used as indicators of metal contamination in freshwater *** of these deformities suggests sublethal effects and can provide early signals of environmental *** anthropogenic metal pollution is known to lead to an increase in deformities in chironomids,natural background deformity incidence information is key to their effective use as biomonitoring *** we explore the incidence of deformities from 5000 Tanytarsus(Diptera,Chironomidae)menta in relation to water physicochemical,and sediment metal(Al,As,Cu,Fe,Mn,Pb,Zn)concentration data from numerous sites in the naturally metal-rich sonora river(NW Mexico)obtained over a two-year *** metal concentrations were found in the upper *** salinity,total suspended solids and conductivity were found in the lower *** As and Cu were occasionally found above published threshold effect levels(TEL).The proportion of deformities(%D)was low(2.1%)and a generalized linear model only explained 25.36%of%D variability among samples;this model included several physicochemical *** only metal significantly related to deformities was *** significant spatial and temporal variability in all metal concentrations and other physicochemical parameters in the basin,we were unable to explain a strong relationship between metal concentration and deformity *** results,based on consistent%D quantification from 5000 samples from a single taxon,suggest that natural variation in metal concentrations,even when statistically significant,is not associated with notable variations in the incidence of deformities.

关键词： Macroinvertebrate Pollution sonora river Desert river Copper Arsenic

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