Spatio-temporal Distribution of Simuliids (Diptera) and Associated Environmental Factors in two Mediterranean Basins of Southern Spain
2002; Volume: 21; Issue: 1 Linguagem: Inglês
10.23818/limn.21.05
ISSN2660-8537
Autores Tópico(s)Environmental DNA in Biodiversity Studies
ResumoThe distribution ofsimuiiid species in rivers Guadaira and Guadaiete (south ofthe Iberian Peninsula) is examined in reiation to some associated environmental factors.The most abundant and widespread species in the study area were Simulium velutinum, Simulium intermedium and Simulium pseudequinum, whereas Simulium lineatum, Simulium ruq5corne and Metacnephia blanci were very rare.Stepwise muitiple regression revealed that S. velutinum was positiveiy influenced by chemicai oxygen demand, whereas S. pseudequinum and S. sergenti depended on altitude (negatively) and current veiocity (positiveiy).The coefficient of correlation between distance between sites and Jaccard's index of simiiarity of the sites showed that the simuiiid community at different sites changed as a direct function of distance.Simulium xanthinum was found only at higher altitude sites, where water quaiity was best.Most of the remaining species were opportunistic.The number of simuiiid species in the basins of rivers Guadaira and Guadalete was lower than that reported for other, nearby basins.The similarity in species composition between these basins was low.
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