Speciation and reactivity of mercury were examined in Berry's Creek estuary downstream of a highly mercury-contaminated U.S. EPA Superfund site during the summers of 2002 and 2003. Surface water samples from Berry's Creek estuary, its confluence with the Hackensack River, and upstream of that confluence were analyzed for total (THg), particulate (PHgT), and dissolved (DHg) mercury, total and pa...

riparian vegetation is a component of river system that performs certain basic functions including primary vegetative production, protecting stream banks from erosion, trapping sediments, promoting water quality, wildlife habitat and fisheris, forage for livestock, etc. in this research, spatio-temporal change of vegetation riparian area of aghbolagh-river as an upstream of karoon-river for 65-...

Abstract Freshwater ecosystems are both incredibly biodiverse and highly threatened globally. Variation in environmental parameters including habitat flow can substantially affect many ecological processes within riverine aquatic communities, but the ties between such ecology neither well studied nor understood. In variable tropical dryland river systems, assessing relationships requires data c...

In the Anthropocene, river networks are globally threatened by human activities, creating dramatic consequences for aquatic biodiversity. Permanent and temporary fragmentation manmade structures drying events, respectively, both increasing in rivers worldwide. Although of these types can limit species dispersal, their individual combined effects shaping metacommunity dynamics at local (site-lev...

background : the imo river basin, nigeria is endemic for onchocerciasis, bancroftian filariasis, loaiasis and mansonellosis. this study was aimed at determining the clinical manifestations of onchocerciasis in this region. methods: a cross-sectional study was carried out in 2006 in umuowaibu i and ndiorji commu­nities in okigwe local government area of imo state, nigeria. consenting individuals...

There are few studies conducted on the short-term effects of land leveling on soil water holding capacity. The objectives of this study were to analyze the short-term effects of land leveling on the magnitudes, variances, spatial variability, and distributions of surface (0-20 cm) and subsurface (20-40 cm) soil properties of bulk density, field capacity, permanent wilting point, water holding c...

The changes in species composition between habitat patches (beta diversity) are likely related to a number of factors, including environmental heterogeneity, connectivity, disturbance and productivity. Here, we used data from aquatic environments in five Brazilian regions over two years and two seasons (rainy and dry seasons or high and low water level periods in floodplain lakes) in each year ...

Investments in the extension of health insurance coverage, the strengthening of public health services, as well as primary care and better hospitals, highlights the emerging role of healthcare as part of China's new growth regime, based on an expansion of services, and redistributive policies. Such investments, apart from their central role in terms of relief for low-income people, serve to reb...