In this research,geological and hydrodynamic induced changes in the Kiashahr-Dastak coastal zone (SW Caspian Sea)were investigated based on aerial photographs(1967 and 1993)and ETM satellite images(2002)of the region ...In this research,geological and hydrodynamic induced changes in the Kiashahr-Dastak coastal zone (SW Caspian Sea)were investigated based on aerial photographs(1967 and 1993)and ETM satellite images(2002)of the region utilizing GIS based softwares.The results were represented as erosional and sedimenttation maps during this time spam.GIS based studies and field investigations show that展开更多
Spatial distribution and structure of nematode assemblages in coastal sediments of the southern part of the Caspian Sea were studied in relation to environmental factors. By considering metals, organic matter, Shannon...Spatial distribution and structure of nematode assemblages in coastal sediments of the southern part of the Caspian Sea were studied in relation to environmental factors. By considering metals, organic matter, Shannon diversity index（H）, maturity index（MI） and trophic diversity（ITD）, ecological quality status of sediment was also determined. Fifteen nematode species belonging to eleven genera were identified at the sampling sites. Average density of nematode inhabiting in sediment of the studied area was 139.78±98.91（ind. per 15.20 cm^2）. According to redundancy analysis（RDA）, there was high correlation between metals and some species. Based on biological indicators, the studied area had different environmental quality. Generally, chemical and biological indices showed different results while biological indices displayed similar results in more sites.展开更多
文摘In this research,geological and hydrodynamic induced changes in the Kiashahr-Dastak coastal zone (SW Caspian Sea)were investigated based on aerial photographs(1967 and 1993)and ETM satellite images(2002)of the region utilizing GIS based softwares.The results were represented as erosional and sedimenttation maps during this time spam.GIS based studies and field investigations show that
文摘Spatial distribution and structure of nematode assemblages in coastal sediments of the southern part of the Caspian Sea were studied in relation to environmental factors. By considering metals, organic matter, Shannon diversity index（H）, maturity index（MI） and trophic diversity（ITD）, ecological quality status of sediment was also determined. Fifteen nematode species belonging to eleven genera were identified at the sampling sites. Average density of nematode inhabiting in sediment of the studied area was 139.78±98.91（ind. per 15.20 cm^2）. According to redundancy analysis（RDA）, there was high correlation between metals and some species. Based on biological indicators, the studied area had different environmental quality. Generally, chemical and biological indices showed different results while biological indices displayed similar results in more sites.
