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Eutrophication brief essay
Disadvantages of Eutrophication
Positive effects of eutrophication
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Eutrophication is the ecosystem response to an excessive richness of nutrients in an aquatic ecosystem. Normally eutrophication is a non-harmful, natural process that occurs when a body of water is aging. The natural cause of eutrophication is the run-off of nutrients from nearby soil and erosion. However a different type of eutrophication is human-caused which accelerates the aging process and creates environmental issues. When there is an excessive richness of nutrients in a body of water, algae feeds off of these nutrients and creates an algal bloom. Algal blooms are harmful because when they die, a lot of oxygen is used to decompose the remains. This causes hypoxia and sometimes, in severe cases, anoxia. This is bad for the environment because it can destroy aquatic life in affected areas. Fish is one type of sea life that is severely affected by eutrophication.
Unfortunately, eutrophication is much more serious now because of human activity. The rise in eutrophic and hypoxic events have been attributed to the rapid increase of agricultural practices, industrial wastes, ...
Nitrogen and nitrates relate to Hypoxia via the process of eutrophication. Since Nitrogen is a limiting nutrient in most waters, the added input of nitrate causes massive growth in algae. The algae rapidly consume all available N, and once the nutrient is limited again, the alga dies en masse. As the alga decomposes, oxygen is depleted in the water. This lowers dangerously lowers the level of dissolved oxygen in the water, which harms living organisms in the area. Small organisms and organisms that are immobile or unable to escape low-oxygen areas are particularly vulnerable. Hypoxia and resulting “dead zones” are harmful to local fishing and shrimping industries and algal blooms hurt the tourism industry. Hypoxia has lead to a decrease of about 25% in the brown shrimp habitat, forcing shrimping operations further offshore. As the hypoxia issue continues to grow, negative human effects will only increase. Since nitrate runoff from ag. has been proven to be the dominant source of hypoxia, policies could be enacted to effectively deal with “point-source” pollution. This makes enacting environmental policy more easily adapted, possibly included in past policy such as the Clean Water Act.
...oceans. Anthropogenic systems such as the combustion of fossil fuels since the industrial revolution have greatly increased the rate of acidification to levels where negative impacts ensue. Negative impacts occur both to marine organisms that rely on certain water conditions to maintain vital functions and the environment which is damaged by highly acidic waters. There is great variation in the acidity of each of the oceans, differences caused by the chemical composition of the ocean and biogeography. Understanding of the potential impacts of ocean acidification is relatively new to the scientific community and therefore little is known on how to counteract anthropogenic influences. Although reducing the amount of carbon dioxide produced will in turn reduce the lowering of the oceans acidity levels and reduce negative impacts on the environment and marine organisms.
Eutrophication is a concern in the Chesapeake Bay. Eutrophication is caused by excessive amounts of nutrients. Excessive nutrients in the bay have negative affects on the bay's ecosystem. The extra nutrients make the environment unbalanced. The extra nutrients cause a chain reaction that depletes oxygen and kills most of the organisms in that area. This is what is known as a dead zone.
Because of farm fertilizer, an excess quantity of nitrogen and phosphorus can be wash down becoming runoff into rivers. From this, marine algal blooms cause the water to turn green from the chlorophyll (Reed, 2011). Eutrophication then becomes a dilemma in the system causing either an increase of primary production or an expansion of algae. An enormous expansion of phytoplankton on the water’s surface is then established. At the same time the water column is also stratified, meaning things such as the temperature and salinity are not sync from top to bottom. The seasonal warm surface water has a low density forming a saltier layer above while the cooler and more dense water masses near the bottom layer is isolated from the top cutting off oxygen supply from the atmosphere (Overview, 2008).
Eutrophication is a concern in the Chesapeake Bay. Eutrophication is caused by excessive amounts of nutrients. Excessive nutrients in the bay have negative effects on the bay's ecosystem. The extra nutrients make the environment unbalanced. The extra nutrients cause a chain reaction that eventually kills most of the organisms in that area. This is what is known as a dead zone.
Some studies have found “that atmospheric CO2 concentration is approximately 383 parts per million by volume (ppmv), a level not seen in at least 650,000 years, and it is projected to increase by 0.5% per year throughout the 21st century.” (Guinotte) “This is because…the ocean absorbs about a third of fossil fuel emissions, but this amount is likely to increase to 90% in the future.” (Bralower) As a result, “the chemistry of the world's oceans is changing at a rate not seen for 65 million years, with far-reaching implications for marine biodiversity and food security, according to a new United Nations study...” (Knight) “…This change is cause for serious concern [for] many marine organisms…, [because they] may not be able to adapt quickly enough to survive these changes.” (Guinotte)
Purpose: The purpose of this lab is to investigate the various components of different ecosystems in a smaller representation and study the conditions required for the ecosystem’s sustainability as well as the connections between
Above all, these organisms encourage the growth of algae, which absorb dissolved oxygen in the water essential for the survival of fish populations. Occasionally, the decomposition of newly-submerged biomass and sediment further reduce the water's oxygen content. Water sources can literally choke to death as a result of increasing human activity, such as industry and agriculture giving rise to increased nutrient loading.
Political ecology began in the 1960s as a response to the neglect of the environment and political externalities from which it is spawned. Political ecology is the analysis of social forms and humans organizations that interact with the environment, the phenomena in and affecting the developing world. Political ecology also works to provide critiques and alternatives for negative reactions in the environment. This line of work draws from all sorts of fields, such as geography, forestry, environmental sociology, and environmental history in a complex relationship between politics, nature, and economics. It is a multi-sided field where power strategies are conceived to remove the unsustainable modern rationality and instead mobilize social actions in the globalized world for a sustainable future. The field is focused in political ethics to refresh sustainability, and the core questions of the relationships between society and ecology, and the large impacts of globalization of humanized nature.
Eutrophication is the reaction resulting from the addition of harmful substances to aquatic ecosystems. Eutrophication causes decreased biodiversity, changes in species composition and dominance dissolved oxygen depletion and problems in water treatments. Eutrophication is currently happening to many of the Canadian Lakes including Lake Winnipeg. Since 1969, it has been observed that Cyanobacteria (blue-green algae) has been the reason for the 90% hike in the algal blooms.Cyanobacteria causes a smelly odour and releases toxins that are detrimental to humans and some other organisms. When the lake is enriched with phosphorus, cyanobacteria thrive due to nitrogen-fixing. Due to the unfair advantage cyanobacteria has over other non-nitrogen-fixing species and its cause in oxygen depletion, other species die off causing decrease in biodiversity. It has been proven through the recoveries of lakes in many countries, including Canada, that reducing phosphorous is the most inexpensive and efficient way to solving the Cyanobacterial blooms. Synthetic fertilizer applications and manure from ca...
A human induced global ecological crisis is occurring, threatening the stability of this earth and its inhabitants. The best path to address environmental issues both effectively and morally is a dilemma that raises concerns over which political values are needed to stop the deterioration of the natural environment. Climate change; depletion of resources; overpopulation; rising sea levels; pollution; extinction of species is just to mention a few of the damages that are occurring. The variety of environmental issues and who and how they affect people and other species is varied, however the nature of environmental issues has the potential to cause great devastation. The ecological crisis we face has been caused through anthropocentric behavior that is advantageous to humans, but whether or not anthropocentric attitudes can solve environmental issues effectively is up for debate. Ecologism in theory claims that in order for the ecological crisis to be dealt with absolutely, value and equality has to be placed in the natural world as well as for humans. This is contrasting to many of the dominant principles people in the contemporary world hold, which are more suited to the standards of environmentalism and less radical approaches to conserving the earth. I will argue in this essay that whilst ecologism could most effectively tackle environmental problems, the moral code of ecologism has practical and ethical defects that threaten the values and progress of anthropocentricism and liberal democracy.
Different pollutants cause different things to happen to plants. Sometimes, water pollution causes an explosion of new plant growth by providing necessary nutrients and food. If there is too much of one species, this can harm or kill plants by changing their growing conditions, such as raising or lowering the environment’s acidity. Plants must take in nutrients from the surrounding environment in order to grow. Nitrogen and phosphorus, in particular, help a plant’s growth because they are important in photosynthesis. This is why they are common ingredients in plant fertilizers. When runoff from farms pollute waterways with nitrogen and fertilizers rich with phosphorus, the water enriched with nutrients often have stunts of growth. Sometimes too much growth can be harmful, as when plant-like algae bloom in polluted waters and create oxygen-depleted dead zones. One solution to this issue is planting seaweed farms in areas that get alot of runoff from farms. This is because seaweed can soak up the excess nutrients and be harvested for people to eat. Marine debris is garbage that ends up in the ocean. Plastic debris that builds up at or near the water’s surface blocks sunlight from fully reaching plants that rely on sunlight to move along the photosynthesis process. By blocking sunlight, marine debris prevent plants from creating glucose at full capacity, which stunts their growth. When chemical pollutants
If many dangerous chemicals are released into the atmosphere, the chemicals dissolve the ozone layer and this causes ultraviolet radiation to directly hit the earth. Figure 2 below gives an overview of the ozone layer. Figure 2: Ozone Layer. Source: Tasos Gkionakis (2017). Eutrophication Eutrophication is a condition where high amounts of nitrogen is present in some pollutants gets developed on the sea surface and turns it into algae and this affects the fish and animal species.
When we sit in a science class, most of the time we are bored as bored can get. We really do not get a chance to explore on our own to find out what’s really out there. Teachers sometimes are not able to get in depth outside the textbook because they are required to teach that all in the year. That is why a lot of kids do not really get into science because they are stuck to the book all the time. Some kids love science and do not really care about the work they have to do. Environmental science, is more than the book really says.
...eochemical cycles. By increasing the amount of crops that are removed from the soil and the subsequent soil erosion, phosphorus levels in the soil have dropped. The phosphorus lost from the soils travels to aquatic ecosystems which then can cause massive algal blooms. The increased use of nitrogen based fertilizers has also altered that cycle. The fertilizers add high levels of nitrates to the soil, and in natural ecosystems, nitrates will undergo denitrification and be returned as atmospheric nitrogen. This is not the case because the nitrate levels exceed the levels of denitrification that bacteria can handle. Additionally, much of the denitrifying bacteria is found in marshes and wetlands, which are currently being destroyed at incredible rates. In some areas, the excess nitrate has made it into the ground water system and contaminated the drinking water system.