出版社：International Academy of Ecology and Environmental Sciences
摘要：In present study the relationship between salinity gradients of various water bodies and inhabiting Odonatanaiads was studied. Naiads, being a popular group of water pollution indicators, were studied. Totally 35 siteswere surveyed for collection of naiads and water samples were taken from each positive site. Eight factors viz.Electrical Conductivity (Ec), Calcium +Magnesium (Ca+Mg), Sodium (Na+), Carbonates (Carb), Bicarbonates(Bc), Sodium Absorption Ratio (SAR) and Residual Sodium Carbonate (RSC) were studied for each watersample. Interesting results were obtained both for Anisoptera and Zygoptera species. Among dragonflies,genus Crocothemis of family Libellulidae appeared to be resistant while Genus Gomphidia and Sympetrum offamilies Gomphidae and Libellulidae were observed to be affected by variations in salinity gradients of watersof different sites. However in case of damselflies Genus Ischnura of family Ceonagrionidae and genusPseudagrion of family Ceonagrionidae were observed to be adaptive followed by genus Ceriagrion of samefamily. As an overall conclusion, Anisopterous naiads were found more susceptible to salinity gradients thanZygoptera and thus can be better used in water salinity diagnoses studies.
关键词：salinity; chemical composition; Odonata; naiads.
