Hell Gate Technically a drowned valleylike the other waterways around New York City,  the strait was formed approximately 11, years ago at the end of the Wisconsin glaciation. The upper portion from Long Island Sound to Hell Gaterunning largely perpendicular to the glacial motion, is wide, meandering, and has deep narrow bays on both banks, scoured out by the glacier's movement.
Algal blooms Algal blooms are one of the more insidious consequences of eutrophication. In addition to being Essay about eutrophication and smelly, masses of blue-green algae can literally choke the life out of a lake or pond by depriving it of much needed oxygen.
At first glance this may seem like something of a paradox - since blue-green algae undergoes photosynthesis, it should produce more oxygen than it consumes. However, after large concentrations of algae have built up, aerobic processes such as respiration and the decomposition of dead algal cells becomes increasingly significant.
Under extreme conditions a eutrophic lake or pond may be left entirely devoid of fish. The cause of algal blooms Algal bloom: Blooms can result in deoxygenation of the water mass when large masses of algae die and decompose, leading to the death of aquatic plants and animals. Algal blooms are not a new phenomenon - Captain Cook recorded an algal bloom during his voyage in !
Algae are a natural component of aquatic environments, and even when they are abundant, it is not necessarily a problem. Often a proliferation of microscopic algae can have beneficial effects on fisheries and aquaculture industries such as oyster or mussel farms by increasing the amount of food available.
Macroalgae provide sheltered habitat for juvenile fish. In fact, the local fishery production in the Peel-Harvey estuary almost doubled in the s when weed macroalgae growth in the estuary was at its peak, without a similar increase in fishing effort.
The effect of algal blooms However, when algal blooms increase in intensity and frequency, the results Essay about eutrophication cause community concern, health problems, and in some cases can be catastrophic to the environment.
The impacts are ecological, social and economic. Algal blooms upset the delicate natural balance of plant and animal ecosystems in a waterway or wetland. They can degrade recreation, conservation and scenic values, and interfere with economic uses such as fisheries and tourism.
Weed that washes ashore and forms rotting piles on beaches can cause offensive smells and become a health problem for nearby residents as well as a nuisance to beach users and fishers.
An over-abundance of algae can choke a body of water such as a river, clog irrigation pipes, and block out the light other plants, such as seagrasses, need to produce food.
Excessive weed growth can eventually kill seagrass beds. When an algal bloom dies the process of decay can use up all the available oxygen in the water, effectively suffocating other aquatic life. This can kill fish, crabs and other animals, especially those that are attached or sedentary do not move around.
Some species of algae produce toxins. Furthermore, algae are a natural and critical part of our Chesapeake Coastal Bays ecosystems.
Algae may become harmful if they occur in an unnaturally high abundance or if they produce a toxin. A high abundance of algae can block sunlight to underwater bay grassesconsume oxygen in the water leading to fish kills, produce surface scum and odors, and interfere with the feeding of shellfish and other organisms that filter water to obtain their food.
Some algal species can also produce chemicals that are toxic to humans and aquatic life. The deterioration of water quality and microbial hazards There are several substances because of unsuitable treatment that cause the deterioration of water. They are as fallows: Oxygen-demanding wastes Most sewage contain organic materials and waste which are oxygen demanding.
The natural system can undergo self-purification processes in which the organic materials and waste are broken down by bacterial and other biological activities naturally. During the process, oxygen is consumed. Later, oxygen can be 'refilled' gradually through a number of re-oxygenation processes.
However, natural systems have a limited capability to accommodate self-purification. If the oxygen required for biodegradation was greater than the oxygen present in water, oxygen depletion will occur.
The activities of organisms will slow down or stop. Such situation usually happens due to high anthropogenic input of organic materials like domestic and industrial sewage discharge into water bodies.
Disease-causing agents There are a lot of disease-causing micro-organisms entering the aquatic system by means of contamination from human and animal waste. Human can be affected through different water contact activities, like swimming, water drinking, etc.
Diseases like cholera and typhoid may spread. These disease-causing micro-organisms may spread to water only sporadically. And once there, they do not survive long. Thus, it is difficult to test their existence in water. Usually, we use fecal coliform as indicator species, such as Eschericia coli, to identify the problem of water contamination by disease-causing micro-organisms.
Thermal pollution It would be cost-effective for industrial and commercial sectors to use water as agent for cooling. However, the discharge of such cooling water may artificially heat up the aquatic environment.CORAL REEF ECOSYSTEM DYNAMICS - How does “nutrient” cycling work on the reefs?
- How do these systems respond to changes in “nutrient” levels? Free Essay: Eutrophication comes from the Greek word "eutrophos" meaning well-nourished. In other words, this natural process found in water occurs.
Objective: To understand the processes that affect rivers. There are three main processes that affect rivers and their valleys. 1. Erosion & Weathering 2. Transportation 3. Deposition Task 1 - Turn to page 8 on the interactive OCR B textbook on your computer.
Topic: Awareness in space.. Unispace+ What is it? UNISPACE+50 was held recently to celebrate the 50th anniversary of the first United Nations Conference on the Exploration and Peaceful Uses of Outer Space and highlight past and future Agency activities in support of the UN’s space-related actions. Welcome to Insights IAS Revision Plan for UPSC Civil Services Preliminary Exam – If you are wondering why these questions are posted, please refer to the detailed Timetable provided HERE.. These questions serve TWO purposes: One to test your revision skills; Second is to give you a glimpse into topics that you might have missed during revision. Eutrophication Essay Eutrophication, or cultural eutrophication, is the enhancement of the natural process by which streams, lakes, reservoirs, and estuaries become enriched with nutrients (phosphorous and nitrogen), enabling the ecosystem to support higher rates of production as measured by biomass or energy per unit area over time.
Copy the definitions of the four main processes of erosion into your book (you should remember these from your coasts work). Oct 26, · Eutrophication is the overenrichment of receiving aquatic systems with mineral nutrients.
The results are excessive production of autotrophs, especially algae and cyanobacteria. This high productivity leads to high bacterial populations and high respiration rates, leading to low oxygen concentrations or anoxia in poorly mixed bottom waters and.
Water Pollution and Drinking Water Quality - All around the world, countries are fighting to keep their drinking water clean. Whether it’s streams, rivers, or lakes, countries have taken great measures to maintain high quality drinking water for both human consumption and animal consumption.
The role of this website is to interpret emergy science and ideas surrounding descent for a broader audience. At the Emergy conference this week, the increasing problem of environmental pollution and human waste was a recurring theme, as was the difficulty of environmental stewardship and low-energy living while nested within an industrial society at the larger scale.