The diversity and abundance of the Odonata documented from Gangetic plain West Bengal covering two types habitats revealed its primarily aquatic nature (Oxbow Lake, Purbasthali). other sites were predominantly grasslands, with smaller water bodies around (RRS, Chinsurah DVC canal, Baidyabati). A total 40 species belonging to 31 genera 5 families, dominant families under suborders Anisoptera Zyg...

Meandering-river geomorphology, forming abandoned channels/lakes with organic carbon-burial and microbial reductive dissolution, play many crucial roles in controlling arsenic (As) fluxes sinks such as contaminated aquifers of riverine alluvial plains across the world. Suhiya oxbow-lake middle plain River Ganga, was selected natural laboratory. A top-down multidisciplinary approach chosen emplo...

Surface sediment quality was assessed during a 35-day artificial flood in a shallow (<1.5 m) oxbow lake along the Coldwater River, Mississippi, using Hyalella azteca 28-day bioassays. Seventeen pesticides were monitored in sediments before, during and after flooding, with increases in atrazine and metolachlor concentrations coinciding with two unexpected storm events, 51 and 56 mm, during and a...

Dissolved organic matter (DOM) is implicated in arsenic (As) and iron (Fe) mobilization via microbial metabolic processes. The Ganges Delta Plain is a key area where As contamination of groundwater constitutes a human catastrophe. The delta plain geomorphology comprises a large number of abandoned meander bends, or oxbow lakes (Donselaar et al., 2017) characterized by an anoxic environment in t...

A three-dimensional water quality model was developed for simulating temporal and spatial variations of phytoplankton, nutrients, and dissolved oxygen in freshwater bodies. Effects of suspended and bed sediment on the water quality processes were simulated. A formula was generated from field measurements to calculate the light attenuation coefficient by considering the effects of suspended sedi...

Fluorescent pseudomonads were a major component [log (10) 4.2-6.1 colony-forming units mL-1] of the culturable heterotrophic gram-negative bacterioplankton observed in three Mississippi Delta oxbow lakes in this study. Pure cultures of fluorescent pseudomonads were isolated from three Mississippi Delta oxbow lakes (18 per lake), using selective media S-1. Classical physiological tests and Biolo...

--A color-banded population of Black-capped Donacobius (Donacobius atricapillus) on a Peruvian oxbow lake was studied during one breeding season and censused for 3 yr thereafter. Eighteen territories along a marshy shoreline were occupied by groups of 24 donacobius. Each group contained a mated pair and 0-2 helpers, apparently offspring produced during 1-2 preceding breeding seasons. Helpers pa...

The Mississippi Delta Management Systems Evaluation Area (MD-MSEA) project was established in 1994 in three small watersheds (202 to 1,497 ha) that drain into oxbow lakes (Beasley, Deep Hollow, and Thighman). The primary research objective was to assess the implications of management practices on water quality. Monthly monitoring of herbicide concentrations in lake water was conducted from 2000...