| Papers [1-6] of 6 | Search results on "EUTROPHICATION": |
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Eutrophication, 2002.
This study is about the process of eutrophication.
1,400 words (approx. 5.6 pages), 4 sources, $ 53.95
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Abstract
This is the gradual increase in the concentration of phosphorous, nitrogen and other plant nutrients in an aging aquatic system, such as a lake, river or shallow sea. When the body of water becomes excessively enriched with nutrients, such as nitrate fertilizers and phosphates, algae and bacteria develops. In turn, this uses extra oxygen in the water, which tends to make it uninhabitable by other animal life. This essay will begin by discussing what eutrophication is and what causes it. It will list some examples and suggest ways that eutrophication can be reversed or halted.
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Eutrophication of Chesapeake Bay, 2004.
A discussion of the pollution problems of Chesapeake Bay's waterways.
1,903 words (approx. 7.6 pages), 11 sources, MLA, $ 60.95
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Abstract
This paper discusses the reasons for the eutrophication of Chesapeake Bay, the consequences of that eutrophication, and possible solutions to the problem.
From the Paper
"Located off the coast of Eastern Maryland and Eastern Virginia, Chesapeake Bay?s length is 200 miles, and its width ranges from four to 40 miles. Many rivers and streams, including the James, York, Rappahannock, Potomac, Patuxent, and Susquehanna rivers, join the bay (Encarta, ?Chesapeake Bay?). Home to more than 2700 species of plant and animal life, including oysters, the blue crab, and over 150 species of fish, the Bay has historically provided settlers and Native Americans with vital natural resources (Virginia Natural Resource Leadership Institute (VNRLI), 1). At its healthiest in the early 1600?s, the Bay rated an estimated100 on a scale of 100 in terms of health, according to the Chesapeake Bay Foundation (Chesapeake Bay Foundation, ?2002 State of the Bay Report?, 1)."
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Internal Phosphorus Loading in Shallow Lakes, 2008.
Explains that phosphorus released from sediments in shallow lakes plays an important role in the inability to manage the eutrophication process.
6,170 words (approx. 24.7 pages), 27 sources, APA, $ 145.95
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Abstract
This paper explains that, in lakes that have suffered years of external loading, high levels of bound phosphorus are released from pools into the surrounding water column. Phosphorus in pools is bound in many forms including redox-sensitive iron compounds and loosely bound organic compounds. The paper describes the microbial action, chemical reactions and physical disturbance to the sediment layer, which contribute to the release of phosphorous into the water column. The paper also reviews several management techniques, such as removing heavily contaminated sediment from the lake floor and precipitation by the addition of iron or alum, which help speed the recovery process of the lake.
Table of Contents:
Abstract
Introduction
Phosphorus forms in Sediment
Phosphorus Release Mechanisms
Chemical Release Mechanisms
Physical Release Mechanisms
Biological Release Mechanisms
Management and Restoration Techniques
Source Reduction Strategies
Physical Reduction of Phosphorus Availability
Chemical Removal
Analysis and Summary of Findings
Analyzing the Unknowns
Conclusions/Recommendations
From the Paper
"The first is the use of physical means such as dredging and flushing to remove sediments containing high concentrations of phosphorus. Another method is the use of agents such as Aluminum Sulfate or gypsum to bind phosphorus in the water system. Yet, other methods have focused on long term reduction of external loading as the ultimate solution to the problem. The success or failure of these methods depends on the source and fractionation profile of the lake.
It was once thought that reducing external loading of the lake would rapidly decrease phosphorus levels in lakes."
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Coral Reef Decline, 2004.
An introduction and summary of the nature of coral reef decline in oceans across the world.
1,943 words (approx. 7.8 pages), 6 sources, MLA, $ 61.95
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Abstract
The paper addresses the importance and value of coral ecosystems and details human-induced threats that are currently affecting corals such as overfishing, direct disturbance, coral bleaching, eutrophication and global climate change. The paper also briefly outlines recommended strategies for managing coral ecosystems in the future. Includes pictures.
From the Paper
"In the world's oceans, coral reef ecosystems contribute to a large portion of the biodiversity of marine life. Besides the living corals themselves, many plants and animals such as fish, algae, bacteria and invertebrates depend on the coral as habitat. Yet in recent years, coral reef ecosystems have declined and changed at alarming rates, leaving scientists trying to decipher the exact workings of these ecosystems and the causes of decline. Some recent suggestions on the factors contributing to reef change are overfishing, disease, large-scale disturbance events, global climate change (namely ozone depletion and global warming), pollution, overharvesting and overpopulation. Global warming in particular has been singled out as the greatest current threat to corals and is considered to play a key role in coral bleaching, an effect which can ultimately lead to mortality of corals. With the marine environment continually changing, coral reefs throughout the world, as well as the diverse array of life they support, are seriously threatened."
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Coral Reefs, 2002.
This paper explores the ecological effects of coral reef damage and the environmental laws which protect them.
1,119 words (approx. 4.5 pages), 6 sources, MLA, $ 38.95
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Abstract
This paper begins by providing a brief definition of coral reefs and their main characteristics. It then discusses the different ecological problems -natural and man-caused which are slowly destroying the reefs. These include eutrophication - when the algae which is in a symbiotic relationship with the coral overgrows the coral using the increased nutrient content of the water and in the process destroys the coral. It also includes over fishing, coral bleaching and tourism. The paper finally examines the various laws and acts which have been passed to try and avert this phenomenon.
From the Paper
"Coral reefs are widely known as the ?rain forests of the ocean?. Providing a habitat to innumerable varieties of marine species the coral reefs are an important part of the marine ecosystem. Occupying an estimated 4,00,000 square miles (0.17%) of the ocean surface the coral reefs sustain more than 25% of all marine life. [Washington College of Law]. However uncontrolled fishing, tourism and other environmentally destabilizing activities of man have seriously endangered the coral reefs. This situation is alarming considering the fact that damage to the coral ecosystem has serious implications for all the countless species that depend on it for their survival. Let us explore the ecological effects of coral reef damage and the environmental laws, which protect them in a little detail."
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Impacts of Nitrogen and Phosphorus Flux, 2005.
An analysis of the impacts of nitrogen and phosphorus glux from sediments in a small pond.
4,062 words (approx. 16.2 pages), 16 sources, APA, $ 109.95
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Abstract
This paper presents a research proposal that will confirm that sediments of the small pond discussed in the paper, like larger bodies of water, will contain significant amounts of P and N, and that these sediments will be one of the sources responsible for the increasing incidence of eutrophic or hypereutrophic in the nation's systems of ponds, rivers, lakes and streams.
From the Paper
"Over the millennia, water has provided humankind with numerous products and services, including transportation, food, drinking water, irrigation, recreation, and protection. Unfortunately, the world's lakes, rivers, and oceans have also been used as a dumping ground for by-products of industrial development and residential refuge. Until recently, however, there was very little attention was paid to water quality (Faeth & Greenhalgh, 2001). Today, the contamination of natural waters such as ponds, lakes, and rivers by anthropogenic organic chemicals has assumed major importance for environmental protectionists. A number of studies over the years have documented how many synthetic organic compounds, although applied or introduced to confined locations, tend to become widely dispersed even to the "ends of the earth" (Schwarzenbach, Haderlein, Muller & Ulrich, 1998). Today, the diffuse loss of phosphorus (P) from agricultural land is generally regarded as a major contributor to eutrophication of fresh water, and there has been a significant increase in research into this issue recently (Fertilizer Applications Influence Phosphorus Runoff, 2004)."
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