The phenomenon of low dissolved oxygen (known as hypoxia) in coastal ocean system is closely related to a combination of anthropogenic and natural factors. Marine hypoxic occurs in the Yangtze Estuary, China with high frequency and long persistence. It’s known that it related primarily to organic and nutrient enrichment influenced by river discharges and physical factors, such as water mixing. In this paper, a three-dimensional hydrodynamic model was coupled to a biological model to simulate and analyze the ecological system of the East China Sea.

Sea Level Rise (SLR) caused by climate change is impacting coastal wetlands around the globe. Due to their distinctive biophysical characteristics and unique plant communities, freshwater tidal wetlands are expected to exhibit a different response to SLR as compared with the better studied salt marshes. In this study we employed the Sea Level Affecting Marshes Model (SLAMM), which simulates regional- or local-scale changes in tidal wetland habitats in response to SLR, and adapted it for application in a freshwater-dominated tidal river system, the Hudson River Estuary.

The present work measures the concentration of different solid species of the trace elements Fe, Mn, Zn, Pb, Cu, Cr, Co and Ni in the surface sediments of Arasalar river estuary at different stations & seasons (2011-2012). Analysis of sediments for trace element concentration gives history of accumulation of metals in environments. Estuarine and marine sediments are very important accumulation site of metals in the coastal areas; therefore analyses of these metals are important to assess the degree of pollution in the marine environment.

Seasonal variation in the distribution of heavy metals in surface waters of Pulicat lake, Tamil Nadu, India was assessed from January 2011 to December 2012. Variation of heavy metals was maximum during summer and minimum during monsoon. The heavy metals investigated were nickel, copper, zinc, chromium, cadmium, mercury, lead and iron. The data revealed that nickel and lead were below the permissible limits, copper, zinc, chromium and mercury were moderately above the permissible limits whereas cadmium concentration was found to be high.

Urban populations are highly vulnerable to the adverse effects of heat, with heat-related mortality showing intra-urban variations that are likely due to differences in urban characteristics and socioeconomic status. The objective was to investigate the influence of urban green and urban blue, i.e., urban vegetation and water bodies, on heat-related excess mortality in the elderly above 65 years in Lisbon, Portugal between 1998 and 2008.

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Anthropogenic inputs influence the community structure and activities of microorganisms, which may impinge the functioning of estuarine and coastal ecosystem. The aim of the present study was to understand the influence of dissolved heavy metals (Cr, Mn, Fe, Ni, Cu and Zn) on community structure of cyanobacteria in a nutrient rich tropical estuary, Cochin Estuary (CE), across the southwest coast of India. Dissolved heavy metals were higher in CE during dry season, with Zn as major pollutant.

The Bahía Blanca Estuary, located at the Atlantic coast of Argentina, includes a governmental nature reserve to protect biodiversity, lands and water; however, as the process of industrialization and urbanization is stepping rapidly at the neighbouring area, the potential increase in contaminant loads is a serious concern. After several contaminants surveys at the estuary, no single study has been yet performed in order to study the native mussels population assemblages vs.

New Zealand’s freshwater habitats including rivers, lakes, estuaries and other wetlands; groundwater and geothermal ecosystems support a unique array of flora and fauna. Freshwater is New Zealand’s greatest asset and is a taonga of paramount importance.

An ecomorphodynamic model was developed to study how Avicennia marina mangroves influence channel network evolution in sandy tidal embayments. The model accounts for the effects of mangrove trees on tidal flow patterns and sediment dynamics. Mangrove growth is in turn controlled by hydrodynamic conditions. The presence of mangroves was found to enhance the initiation and branching of tidal channels, partly because the extra flow resistance in mangrove forests favours flow concentration, and thus sediment erosion in between vegetated areas.

Recognizing the importance and uniqueness of the Sundarbans, the United Nations Educational, Scientific and Cultural Organization (UNESCO) declared the Indian portion of the forest a World Heritage Site in 1987, and the UNESCO Man and the Biosphere Program has included the Sundarbans Biosphere Reserve in the Global Network of Island and Coastal

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