نتایج جستجو برای: ecological indices
تعداد نتایج: 181372 فیلتر نتایج به سال:
The total concentrations and chemical forms of heavy metals (Cd, Cr, Cu, Ni, Pb and Zn) in the surface sediments of the Laizhou Bay and the surrounding marine area of the Zhangzi Island (hereafter referred to as Zhangzi Island for short) were obtained and multiple indices and guidelines were applied to assess their contamination and ecological risks. The sedimentary conditions were fine in both...
Introduction: Heavy metals (HMs) accumulated in the road dust may be transferred to the surrounding land and water bodies and pose ecological risks. Hence, such pollution should be considered, especially in coastal roads. This study focuses on the HMs pollution of dust settled on the surface of coastal roads along the Persian Gulf in Bandar Abbas city. Materials and Methods: In this study, ro...
BACKGROUND Nowadays, aquatic organisms are used as bio-indicators to assess ecological water quality in western regions, but have hardly been used in an Iranian context. We, therefore, evaluated the suitability of several indices to assess the water quality for an Iranian case study. METHODS Measured data on biotic (fish and macroinvertebrates) and abiotic elements (28 physicochemical and hab...
ecological studies based on field data have shown that vegetation phenology follows a relatively well-defined temporal pattern. this pattern, that is reflecting the cumulative temperature from the date of the beginning of the growth, can be represented by the use of a suitable model. due to the spatial, temporal, and ecological complexity of these processes a simple method to monitor phenologic...
Abstract In an increasingly urbanized world, there is a need to study urban areas as their own class of ecosystems well assess the impacts anthropogenic on biodiversity. However, collecting sufficient number species observations estimate patterns biodiversity in city can be costly. Here we investigated use community science-based data occurrences, combined with distribution models (SDMs), built...
5220 metaphase plates of 187 infants from different ecological districts of Precarpathia have been analyzed with the aim to determine the frequency and spectrum of chromosomal aberrations, associations of acrocentric chromosomes in newborns. It was determined that the total number of chromosomal aberrations in newborns from districts of ecological comfort was 2, 0 and 2, 3 times lower as compar...
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