نتایج جستجو برای: benthic macroinvertebrates
تعداد نتایج: 12923 فیلتر نتایج به سال:
In present study, besides investigating benthic communities and their demographics in Choghakhor wetland, the water quality has been evaluated and classified. Then, 10 stations were selected and sampling of benthos was done every 45 days since April 2010 to March 2011, with 3 replications at each station. Samples were obtained by Ekman grab Sampler (surface 400 cm2). The collected samples were ...
This study aimed to investigate macroinvertebrates biodiversity indices in Chalus River in Mazandaran province and the impact of spring floods on these indices during spring and summer in 2015. Environmental parameters including daily discharge data during 2014-2015, temperature, dissolved oxygen, nitrate, phosphate, pH, TDS and EC were measured in river branches and main channel of the river a...
ارزیابی بوم شناختی رودخانه تجن با استفاده از گروههای تغذیه ای بزرگ بی مهرگان کفزی و شاخص های زیستی
One of the best practical methods to understand ecological status of a water body and determine impacts of human intervention in reducing water quality is using benthic macroinvertebrates as assessment tools for monitoring their biological integrity and health. The Tajan River is one of the rivers of Caspian Southernsub-basin that drains the Caspian Sea. Macroinvertebrate samples were taken u...
Sediment transport, one of the key processes of river systems, is altered or stopped by dams, leaving lower river reaches barren of sand and gravel, both of which are essential habitat for fish and macroinvertebrates. One way to compensate for losses in sediment is to supplement gravel to river reaches below impoundments. Because gravel addition has become a widespread practice, it is essential...
Enhancement projects within anadromous salmonid rivers of California have increased in recent years. Much of this work is intended as mitigation in regulated streams where salmon and steelhead spawning habitat is inaccessible or degraded due to dams, water diversions and channelization. Little research has been done to assess the benefits of spawning habitat enhancement to stream organisms othe...
Many benthic macroinvertebrates are associated with cultured bivalves but normally excluded from studies on the environmental effects of bivalve aquacultures. We evaluated hypothesis that mussel aquaculture increases overall “benthic” macroinvertebrate productivity by considering both sediment- and sock-associated macroinvertebrates. It was predicted presence invasive ascidian Styela clava woul...
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