Order of the National Green Tribunal in the matter of In re : News item published in the Newspaper named, DHNS, Mangaluru dated: 15th May, 2022, titled “Officials term discolouring of water in beaches as algal bloom” dated 18/11/2022. Proceedings have been initiated in the matter in the light of …
Salt marshes are highly productive coastal wetlands that provide important ecosystem services such as storm protection for coastal cities, nutrient removal and carbon sequestration. Despite protective measures, however, worldwide losses of these ecosystems have accelerated in recent decades. Here we present data from a nine-year whole-ecosystem nutrient-enrichment experiment. Our study …
Anthropogenic-induced changes in nutrient ratios have increased the susceptibility of large temperate lakes to several effects of rising air temperatures and the resulting heating of water bodies. First, warming leads to stronger thermal stratification, thus impeding natural complete water turnover (holomixis), which compensates for oxygen deficits in the deep zones. …
Global warming and the alteration of the global nitrogen cycle are major anthropogenic threats to the environment. Denitrification, the biological conversion of nitrate to gaseous nitrogen, removes a substantial fraction of the nitrogen from aquatic ecosystems, and can therefore help to reduce eutrophication effects. However, potential responses of denitrification to …
A hallmark of the latter half of the 20th century is the widespread, rapid intensification of a variety of anthropogenically-driven environmental changes
Water masses can become undersaturated with oxygen when natural processes alone or in combination with anthropogenic processes produce enough organic carbon that is aerobically decomposed faster than the rate of oxygen reaeration. The dominant natural processes usually involved are photosynthetic carbon production and microbial respiration. The re-supply rate is indirectly …
Nutrient cycles link agricultural systems to their societies and surroundings; inputs of nitrogen and phosphorus in particular are essential for high crop yields, but downstream and downwind losses of these same nutrients diminish environmental quality and human well-being. Agricultural nutrient balances differ substantially with economic development, from inputs that are …
Human-induced eutrophication, or nutrient overenrichment, is a rapidly growing environmental crisis in freshwater and marine systems worldwide. Nutrients that cause eutrophication include nitrogen and phosphorus. While nitrogen and phosphorus are critical to biological processes in aquatic ecosystems, increased runoff of these nutrients to aquatic ecosystems from land-based sources results in …
Human activities have increased the availability of nutrients in terrestrial and aquatic ecosystems. In grasslands, this eutrophication causes loss of plant species diversity, but the mechanism of this loss has been difficult to determine. Using experimental grassland plant communities, we found that addition of light to the grassland understory prevented …
Before it became a hi-tec city, Hyderabad was famously known as the city of lakes. There are over 532 water bodies in and around the state capital with Hussainsagar Lake being the most prominent one. However, rapid urbanisation in the past few decades has all but destroyed the water bodies …
Increasing quantities of atmospheric anthropogenic fixed nitrogen entering the open ocean could account for up to about a third of the ocean's external (nonrecycled) nitrogen supply and up to ~3% of the annual new marine biological production, ~0.3 petagram of carbon per year. This input could account for the production …
The Dutch canal wetland system in Sri Lanka is an important wetland area for shrimp farming and has become a promising foreign exchange earner. However, shrimp farming in the Dutch Canal is largely unplanned and un-coordinated with more than 1,300 farms working in an area of 3,750 hectares. The lack …
This report analyses the impacts of climate change on eutrophication in the northern waters of the Baltic Sea. Two scenarios are presented. The first scenario, the Climate Change Scenario, assesses the impacts of predicted climate change under circumstances where no additional conservation measures are carried out. The second scenario, the …
Nitrogen is an important nutrient in domestic and industrial wastewater and its elevated concentration in the wetland promotes explosive growth of algae. The decomposition of the algae leads to an excessive growth of bacteria, utilizing and dissolved oxygen from water. This process of rapid algal growth leading to oxygen-starved waters …
This document is intended to provide an overview of the major components of surface and ground water quality and how these relate to ecosystem and human health. Local, regional, and global assessments of water quality monitoring data are used to illustrate key features of aquatic environments, and to demonstrate how …
