2.1Introduction
Land use change can be defined as a process by which natural processes and human activities transform the land. According to Wu (2008), land use change is ostensibly the most pervasive financial power driving changes and transformation of biological systems. The change from one land use to another usually occurs naturally or by anthropogenic activities (Guo and Gifford, 2002). Land use changes through human activities covers changing forest to agricultural practices, changing from agricultural practices to residential area and/or changing from residential land to conservation site. Natural land use changes are associated with global climatic changes that may lead to natural disasters such as tsunamis, floods and volcanic eruptions. Land use change has several environmental, economic and social implications which are faced globally and is regarded as one of the uppermost causing factors of regional ecosystem changes (Pardini et al., 2010). Land use changes have both negative and positive implications on the environment, economy and society at different spatial and temporal levels(Briassoulis, 2004).
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The combined causes of land use change differ with time, space and environment(Lambin et al., 2003). There are direct causes of land use change which includes population growth, economic growth and initiation of policy, laws ad legislations (Morara et al.,
Investigate the economic, social and environmental implications of changing land use around Sydney Harbour. As one of the most recognised icons in the world, Sydney Harbour has been fundamental to the history and the development of both Sydney and Australia as a whole. Although still the same size and location, there have been many changes in the use of the land in Sydney Harbour over the past thousands of years , in particular the Millers Point and Barangaroo precincts which lie among the southern side of the harbour. Through this change in land use, economic, social and environmental implications of the harbour have created many challenges for the government and community.
In 1820, most people were settled in particularly the east and there were approximately 2-89 persons per sq. mile. In 1860, the population had increased rapidly showing more people traveling to the western areas. The two maps show wide differences occurred over the course of decades. This indicates that moving west had expanded more of the land and it caused population to
Many ecological effects include Habitat loss, cumulative impacts and impacts on biodiversity, Excessive water consumption in cultivation, Soil erosion, declining soil health and fertility, Agrochemical use, Water pollution, Sugarcane processing, Farming marginal lands , and Global sugar trends with environmental implications. Historical clearing of a wide range of unique habitats for sugarcane cultivation is probably one of the most significant causes of biodiversity loss from agriculture on the planet. Some major effects water pollution had were Diversion from rivers, in extreme cases exposing dry
6. Describe four variables that govern changes in population size and write an equation showing how they interact. Four variables – births, deaths, immigration, and emigration- govern changes in population size. A population increases by birth and immigration (arrival of individuals from outside the population) and decreases by death and emigration (departure of individuals from the population): Population change = (Births + Immigration) – (Deaths + Emigration) Age structure: Percentage of the population (or number of people of each sex) at each age level in a population.
Tremendous population growth and depletion of nutrients from overplanting were causing great demand for land. The birth
The effect of reduced forest size has already had a measurable impact on the composition of our atmosphere in the relatively short amount of time we have been cutting them down(6). Ironically however it is the conversion of forest land to urban and agriculture use that has a more permanent and detrimental impact. Logging and urbanization lead to forest succession. Forest succession happens when there are changes to an environment that causes the composition of plant and animal species to change. New species succeed the existing ones as a result of things like changes in amount of shade, temperature, or the introduction of foreign species.
William Cronon’s Changes in the Land shows the effect on the land of widely disparate conceptions of ownership owned by Indians and English colonists. He also interprets the situations occurring in New England with the plant and animal communities and the change from Indian to English take over. As residents of Europe were introduced to North America, the boundaries between the two were unclear. Cronon uses evidence to explain the situation that led to the ecological ramification of contact with New England. The law materialized land, making it material of which the purchaser had ownership.
4. Habitat alteration: Removal and reduction of natural habitat by flooding, soil erosion and water
The goods that were exchanged had a significant impact on the environment and the civilizations. Demographic changes are changes with the human population based on size, structure, and distribution. Environmental
These include floods and droughts. However, the most concrete impact recently has been by drought. The government and the people have not been able to provide enough food supply for themselves. Due to the growth
Argumentative Essay Zeena Morar 12J Climate change is currently being felt around the world and unless the developed world makes substantial changes to its selfish ways, we are all doomed to face the fires of hell on earth. One third of the earth’s land is currently threatened as what we do to the air, land and water affects the balance of ecosystems and ultimately the world. The developed world uses wood for mining, building, furniture and paper. Saw and paper mills that are used to create these products, pollute the air and water.
2.8.2 Urbanization Urbanization led many areas becomes more modernized. Lowland areas have been reclaimed by taking land from the hills. There are also small rivers that filled up to be used as a building site. Activities such as these are a common factor of flooding. In the past, creeks and valleys turned into water flow, now the area has been covered with soil.
One of the greatest issues that we face towards the environment has been an increasingly difficult problem over the last few years. Earths climate is changing at rapid paces and solutions are needed as quickly as possible to replenish natural ecosystems and cultures that depend on the environment. Climate change not only affects the animals in our ecosystem, but us humans as well. With the human population increasing every year, climate change is only getting worse. Many argue that the effects of climate change towards the environment are due to other extraneous factors, however, I myself am a strong believer that the problems such as rising sea levels, warmer temperatures and natural disasters are all due to both natural causes and human activity.
And one of the old solutions for this concern is to increase number of cultivation lands and exploit new fish stocks. But the competition for land from other human activities makes this an increasingly unlikely and costly solution .for example food producers are experiencing grater rivalry for land, water energy and the need to curb the many negative effects of food production on the environment becoming increasingly clear (Tilman et al. ,2001;
It can result from an increase in births, a decline in mortality rates, an increase in immigration, or an unsustainable biome and depletion of resources.. Can speeds up the process of natural land subsidence. This process includes the increase in population size, Increase in water needs, High water necessities, Increase in groundwater Pumping to fulfill the water need, Over-pumping of ground water, Speeds up the process of natural land