Nutrient Distribution and Bioavailability in a Tropical Microtidal Estuary, Southwest India

Abstract

a draft notification under sub-section (1) of section and clause (V) of subsection (2) of section 3 of the Environment (Protection) Act, 1986 AND WHEREAS, the suggestions and objections received from the public have been considered by the Central Government.;Now, therefore, in exercise of the powers conferred by sub-section (1) and clause (v) of sub-section (2) of section 3 of the Environment (Protection) Act, 1986Act, (29 of 1986, the Central Government, with a view to ensure livelihood security to the fisher communities and other local communities, living in the coastal areas, to conserve and protect coastal stretches, its unique environment and its marine area and to promote development through sustainable manner based on scientific principles taking into account the dangers of natural hazards in the coastal areas, sea level rise due to global warming, does hereby, declare the coastal stretches of the country and the water area upto its territorial water limit, excluding the islands of Andaman and Nicobar and Lakshadweep and the marine areas surrounding these islands upto its territorial limit, as Coastal Regulation Zone (hereinafter referred to as the CRZ) and restricts the setting up and expansion of any industry, operations or processes and manufacture or handling or storage or disposal of hazardous substances as specified in the Hazardous Substances (Handling, Management and Transboundary Movement) Rules, 2009 in the aforesaid CRZ.; and

Temporal Assessment of Phosphorus Speciation in a Model Ramsar Lake System in Asia

“…Other factors may involve the surge in microbial activity and the rise in phosphorus release from sediment at elevated temperatures [34]. Similar trends were observed in phosphate content in the 'Cochin estuary, draining into Vembanad lake [16], and River Sitalakhya (Bangladesh) [35]. Soluble reactive phosphate concentration of over 0.025 ppm is usually considered showing eutrophic conditions [36].…”

“…Against this backdrop, the Lake Vembanad emerges as a critical case study, representing one of India's largest and most ecologically significant wetland ecosystems [14]. Designated as a Ramsar Site for its rich biodiversity [15,16], the lake faces mounting pressures from human activities, including agricultural runoff and industrial pollution [17].…”

Numeric Study on the Influence of Sluice-Gate Operation on Salinity, Nutrients and Organisms in the Jiaojiang River Estuary, China

“…Specifically, salinity, as a sensitive ecological factor in estuarine habitats, is related to the distribution of phytoplankton [8], while the concentration and distribution pattern of nutrients restrict the biomass of phytoplankton [9]. Besides, there is established consensus that the increase of nutrients is the leading cause of water eutrophication, which has been identified as one of the greatest threats to the health of coastal ecosystems [10]. There is ample evidence that maintaining a suitable salinity and nutrient environment is a fundamental guarantee of the survival and reproduction of organisms and the maintenance of biodiversity [11][12][13].…”