نتایج جستجو برای: bioassessment

تعداد نتایج: 217  

Journal: :Environmental monitoring and assessment 2012
Robert M Hughes Alan T Herlihy William J Gerth Yangdong Pan

The number of sites sampled must be considered when determining the effort necessary for adequately assessing taxa richness in an ecosystem for bioassessment purposes; however, there have been few studies concerning the number of sites necessary for bioassessment of large rivers. We evaluated the effect of sample size (i.e., number of sites) necessary to collect vertebrate (fish and aquatic amp...

Journal: :Vestnik Volgogradskogo Gosudarstvennogo Universiteta. Serija 11. Estestvennye nauki 2018

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