Phytoplankton is an aquatic organism that sensitive to environmental changes. Kali Mas one of the rivers passes through city Surabaya, and a source water needs for various domestic industrial needs. The purpose this study was determine status quality based on phytoplankton community structure, which includes: diversity, abundance, evenness, dominance, saprobic index. method used in purposive sa...

Los sistemas lóticos pampeanos constituyen una unidad única de paisaje, siendo la baja velocidad corriente, ausencia plantas leñosas y el escaso sustrato rocoso principales características que regulan desarrollo los productores primarios, permitiendo crecimiento del fitoplancton. Esta comunidad, cobra relevancia llega a ser vital para sostener e integrar las tramas tróficas acuáticas. Para estu...

AbstractSungai Pisang Bay is located south of Padang City, at this location there are various activities including Pasumpahan Island water tourism, fishing, and settlement activities. This expected to pollute the sea have an impact on marine biota, especially phytoplankton. The purpose study was examine quality seawater based composition structure phytoplankton community in Sungai Bay, City. re...

Integrated Multi-throphic Aquaculture (IMTA) is a system in cultivation that prioritizes balance its maintenance. The IMTA method utilizes feed residues can be utilized by organism from the remaining biota at higher levels of trophic with lower levels. This study aims to analyze biological parameters different densities seaweed and green mussels best stocking for growth survival tiger shrimp. t...

The potentially toxic freshwater cyanobacterium Cylindrospermopsis raciborskii has become increasingly prevalent in tropical and temperate water bodies worldwide. This paper investigates the effects of different nitrogen sources (NO3-, NH4+, and omission of a fixed form of nitrogen) on the growth rates, morphologies, and cylindrospermopsin (CYL) concentrations (expressed as a percentage of the ...

This study aims to analyse the influence of a cascade of reservoirs on the density, richness and functional groups of phytoplankton in the Contas River, a tropical river of Brazil. This river has two dams along its course, forming the Pedra and Funil reservoirs. Samples were collected over three consecutive years (Dec., 2007 to Dec., 2010) at 28 sampling stations along the river. We identified ...

Periodical changes in physico-chemical properties and cyanophycean bloom in a pond ofAgra city during the year 2005 and 2006 were studied. It was recorded that the pond water was polluted throughout the study period and this was closely associated with Cyanobacterial bloom. During summer (March to June), the pond water was highly polluted, as it was rich in various nutrients and phosphates in p...

Daphnia p&x (Crustacea, Cladocera) was fed the blue-green algae (Cyanophyceae) Anacystis nidulans, Synechococcus elongata, S. cedrorum, Merismopedia sp., Anabaena flosaquae, Synechocystis sp., and Gloeocapsa alpicola. The green algae ( Chlorophyceae) Ankistrodesmus falcatus and Chlorella uulgaris were used for comparison. Direct observations were made of D. pulex feeding in depression slides fi...

In this paper Shannon-Weaver (SI-3.58-4.07, SII-3.1-3.72, SIII-1.64-2.25, SIV-2.54-2.95 and SV-3.09-3.23) diversity index was applied to surface phytoplankton to study the water quality status of river Bhadra receiving Mysore paper mill and Iron and steel mill effluent. A total of 45 species of phytoplankton belonging to 5 classes were recorded and study indicated that the phytoplankton diversi...

Characterisation of phytoplankton communities in aquatic ecosystems is a costly task in terms of time, material and human resources. The general objective of this paper is not to replace microscopic counts but to complement them, by fine-tuning a technique using absorption spectra measurements that reduces the above-mentioned costs. Therefore, the objective proposed in this paper is to assess t...