Chromium (Cr) is ubiquitously present in the aquatic environment. From various natural and anthropogenic sources Cr (VI) reaches to the aquatic ecosystem through weathering and surface runoff. The nature of metals is conservative which leads to the buildup of metal concentration in aquatic system. Microscopic phytoplankton imbibes these metal ions as nutrient irrespective of their essentiality ...

Secondary production, density and biomass fluctuations, and some reproductive aspects of the rotifer Brachionus plicatilis were studied weekly for two years in a Brazilian coastal lagoon. Food (and secondarily temperature) seemed to be the main factor involved in the summer increments. In the first summer, a mass mortality of fish caused changes in the phytoplankton, which switched from the dom...

This study aims to evaluate the environmental factors determining of the changes in phytoplankton structure in spatial (upper, middle and lower course) and seasonal (dry and rainy period) scales in a eutrophic river (Almada River, northeastern Brazil). In the study period, total accumulated rainfall was below of the historic average, resulting in flow reduction, mainly in rainy period. High ort...

I measured physico-chemical properties and phytoplankton in the small, shallow tropical reservoir of Oyun (Offa, Nigeria) between January 2002 and December 2003. I identified 25 phytoplankton genera in three sampling stations. Bacillariophyceae dominated (75.3%), followed by Chlorophyceae (12.2%), Cyanobacteria (11.1%) and Desmidiaceae (0.73%). The high amount of nutrients (e.g. nitrate, phosph...

The present study was to understand the diversity and distribution pattern of microalgae in fresh water system represented by an open artificial pond. A total 100 species phytoplanktons were indentified from different groups Chandrasarovar pond Jhalawar, Rajasthan. Among identified phytoplankton Cyanophyceae (39%) formed dominant group, followed Chlorophyceae (34%) Bacillariophyceae (23%) Eugle...

Plankton population of shrimp and shrimp-GIFT (Genetically Improved Farmed Tilapia) culture ponds were studied. The present study was carried out to estimate phytoplankton zooplankton abundance diversity in mono polyculture systems. A total 13 genera cyanophyceae, chlorophyceae, bacillariophyceae, euglenophyceae, rhodophyceae dinophyceae recorded from the monoculture while 12 measured shrimp-ti...