Leaf-litter assays have advanced understanding of decomposition processes in both terrestrial and aquatic ecosystems. Some shortcomings inherent in the technique may be overcome through use of a cotton-strip assay. Key assumptions for using cotton strips as proxies for natural leaves are: 1) decomposition rates of the 2 materials are related, and 2) the materials decay in a similar way when exp...

The study was undertaken to determine bacterial contamination of warm-water fish ponds and silver carps harvested from those ponds in Guilan province, Iran. In this respect, water samples were taken from 7 ponds and investigated by testing total bacteria, coliforms, and Escherichia coli. In addition, skin swab samples of silver carps caught from each pond were studied for enumeration of the sam...

The acoustic lance is an instrument developed to obtain in situ compressional wave velocity and attenuation ~Q! profiles for a sedimentary layer of several meters thickness at the sediment– seawater interface. The self-contained instrument consists of ten independent recording channels with a linear array of receivers embedded in the seafloor below a broadband acoustic source. It provides in si...

A very noticeable increase in the beaver population (mainly Eurasian (Castor fiber L.)) East European Plain since end of 20th century through reintroduction contributed to emergence a large number dams and ponds, which resulted transformation channels hydrological regime small rivers. In this paper, for first time Middle Volga region, regularities distribution ponds on rivers were revealed base...

The phytoplankton that characterized the Smith Island pond was diverse, with several species of diatoms, dinoflagellates, and bluegreen algae dominant throughout the year. A tota� of 146 species were noted, predominantly com­ posed of ultra and nanoplankters, that includes representatives from coastal waters. The island ponds are considered eutrophic habitats whose composition is influenced by ...

Paralytic Shellfish Poisoning (PSP) toxins are annually recurrent along the Massachusetts coastline (USA), which includes many small embayments and salt ponds. Among these is the Nauset Marsh System (NMS), which has a long history of PSP toxicity. Little is known, however, about the bloom dynamics of the causative organism Alexandrium fundyense within that economically and socially important sy...

Samples of water, sediment and shrimp obtained from hatcheries and culture ponds were collected over a period of four months and were analyzed for Vibrio parahaemolyticus. Samples included the following: two samples of shrimp larva from two hatchery ponds (WLH); 14 samples of water, sediment and shrimp from 14 culture ponds supplied with shrimp larvae from the same hatchery ponds that were obta...

the concentrations and speciation of mo, together with fe, cu, and zn, in nver river sediments impacted with mo mining activities in western liaoning, northeast china, were investigated withgeochemical method. using the x-ray fluorescence and x-ray diffraction, the characterizations of metals in tailings ponds deposited along the nver river bank were analyzed. analysis and comparison of the con...

The study was undertaken to determine bacterial contamination of warm-water fish ponds and silver carps harvested from those ponds in Guilan province, Iran. In this respect, water samples were taken from 7 ponds and investigated by testing total bacteria, coliforms, and Escherichia coli. In addition, skin swab samples of silver carps caught from each pond were studied for enumeration of the sam...