Biodiversity and Land Quality Essay

In addition, farmland has been destroyed because of the floods and the decrease in delta sediment. The dam has reduced downstream nutrients and sediment flow. And has seriously impacted neighboring river and seacoast ecosystems.

Beside these arguments, there is also a more quantitative side to the debate. The ecological detriments of the Glen Canyon Dam have been well-documented. Extensive changes were brought about in the Colorado River ecosystem by the construction of the Glen Canyon Dam. Most of these alterations negatively affected the functioning of the system and the native aquatic species of the river. The reduced supply and transport of

The first example of human manipulation of changes within the biosphere is through expansion. The rapid growth of the population has led to expansion in development; the need for more space is causing strain on other living organisms such as plants and animals. Human procurement of forest, grass, and wetlands has weighed on the animal population heavily. As a result of this domination, animals have lost areas they use to thrive in, causing migration and in more serious cases extinction. Animals are a prevalent source of protein for humans, and when a species is threatened by extinction, it not only disrupts the balance of the ecosystem, but it also disrupts the food chain. The more resources that are required to sustain human life, the bigger the need to migrate to surrounding areas in a short period of time (Haines).

Humans have existed since 200,000 years but the Earth has existed around 4.5 billion years. Nature has provided us with everything we have today - food, medicines, materials, chemicals, metals, minerals etc. It can only keep providing us when we maintain the right environment for it to exist. This environment depends on the biodiversity of Earth. The number of species of plants, animals and microorganisms and the various genes in these species, different ecosystems such as deserts, rainforests and coral reefs are all part of a biologically diverse Earth. Hence Biodiversity impacts everything. We will discuss how Biodiversity plays a crucial role on social, environmental, and economic factors. We will also discuss what

‘Compare the nature and rate of change that affect the functioning of TWO different ecosystems at risk.’

The article discussed the changes in many habitats due to anthropogenic activity. Anthropogenic is an adjective that describes changes in nature due to the people. Next, this article discussed climate change and the impact that it is having on species like clams, and fish due to ocean temperatures rising. The article also addressed carbon dating of fossils to look for cause of extinctions. Human development and agriculture have had a tremendous impact on the population of many species that are terrestrial. Deforestation is a big problem that has caused a decline in the bird species. Commercial fishing in many areas has led to a decline in fish populations. Furthermore this article

I researched the Everglades in Florida. There have been many negative changes in this habitat both from humans and other species. The region’s water resources are being depleted by invasions of exotic plants such as the Australian Melaluca. The Australian Melaluca also affected the native species of which the rest of the ecosystem depends. Another effect on the water is the runoff from agricultural operations, which gets into the water and pollutes it. Development pressures from agriculture, industry, and urban areas have destroyed more than half of the original Everglades

In 1992, The Elwha River Ecosystem and Fisheries Restoration Act of 1992 authorized the US Federal Government to acquire the hydroelectric power projects of Elwha Dam and Glines Canyon Dam, where are located on the Washington State for demolition for habitat restoration and decommissioning. The dam removals began in 2011 and finished in 2014. I wondering that why government decided to remove the dam and what happens in Elwha River after dam removal. In this paper, I write about the following topics: main purpose of the Elwha and Gliens Canyon dam, effects to the Elwha River as well as ecosystem after constructing dam, reasons of the dam removal, process of the dam removal, and effects after dam removal.

The destruction of various ecosystems through modalities such as bulldozers, cranes, and irrigation systems have shaped the current state of the world. As countries continue to industrialize many parts of the world are becoming increasingly urban. The desire to turn undeveloped areas into bustling cities has been exorbitantly transformative in the state of the world's ecosystems. Increasing populations resulted in a greater amount of socio-economic, agricultural and industrial activities (Schultz). Therefore, a high stress was placed on local ecosystems to meet those demands. Cities now lack

Forests have been cut, crops planted, pastures seeded, and urban areas paved. One of the most troubling consequences of human modification of ecosystems is an ongoing loss of species and therefore a loss of biodiversity around the world. The current extinctions have a human cause: habitat loss (such as clearing of tropical rainforests); the introduction of invasive species; unregulated hunting and fishing; and pollution of water, air, and

The fragility of river biome ecosystems are increasing more and more with each passing year. Development of man-made, hydraulic obstructions and pollution are two of the biggest factors putting the Missouri River at risk. Less than 70% of the planet’s longest 177 rivers are without man-made structures, such as dams. The number will only continue to increase as global populations grow and untapped rivers are targeted. Structures built on rivers negatively affect plants, animals, and especially humans, as the majority of water used by people comes from rivers. The effects of interfering with the natural flow of rivers can already be seen in the straining of the Colorado, Indus, and Yellow rivers, as they have begun to dry before reaching the sea. It is only time before the Mississippi River, which is a continuation of the Missouri River, is affected as such. The aforementioned demonstrates the expanding environmental harms rivers are facing. Backing this up, scientists have shown that disrupting a river’s natural flow patterns incredibly affects its wellbeing. For

The United States has led the world in dam building for the past 100 years. The dams are used for a variety of purposes, including hydropower, irrigation, flood control, and water storage. Even though dams can be a benefit to society, they can also cause a lot for harm to the rivers. Dams degraded river ecosystems, depleted fisheries, and diminished the recreational use of nearly all of the nation’s rivers. Many of the dams are unsafe, old or no longer serve their intended purposes.

With human development, industrial pollution and other factors all contribute to the deteriorated condition of the river, which makes it difficult to determine the dams’ environmental impact in isolation. CITE That said, the current operations of the dam hamper and potentially prevent environmental improvement of the Colorado. In order to preserve some semblance of the Colorado ecosystem, man must restore the natural processes that created the ecosystem. The real question is how to do that, whether via dam decommission or a less extreme policy change.

The health of the earth degrades with the destructive activity of human beings. A recent study by a group of scientists looked at twenty four different services that the earth’s ecosystems provide for humans, ecosystem services, and found that fifteen of them are in need of desperate help (Gazette 31 March 2005). These services are vital to the survival of both human and nonhuman life and include filtering water and providing nutrient rich soils and ocean waters. Many of the members of these various ecosystems are also decreasing in numbers. In a British survey of bird populations found that in the 200 birds of Britain tracked there was about a 54% population decrease between the 1968-1971 tacking period and the 1988-1991 tacking period. In two other surveys of 254 native plant species from the same area there was a decrease of about 28% during the past 40 years. Humans are pushing the sixth mass extinction (Gazette March 19, 2004).

Franck and Brownstone define biological diversity as 'the variety and variability of living organisms and the biological communities in which they live' (36). Decades of progress in both the scientific and political arenas have advanced environmental legislation to protect biodiversity at not only the ecosystem level, but for specific species and genetic material as well. Research has shown the importance of every organism and their role in the global ecosystem, and legislation has gradually matured to protect not only species which may become endangered, but the habitats they need to survive as well. Growing consciousness surrounding environmental issues has enabled these protections to be