• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Deforestation Ecosystem Model Answers

Extracts from this document...

Introduction

´╗┐Deforesation Model Exam Answers What is deforestation? (2 marks) Deforestation is the deliberate clearance of woodland by cutting, burning or the application of a defoliant and is a major environmental issue around the world. Why is deforestation of tropical rainforests such an issue? (2) The rich biodiversity found in tropical rainforests means that some species exist that humans have not discovered yet, and they could hold the key to future medical cures. Huge tropical rainforests of Amazonia absorb massive amounts of carbon dioxide through the process of photosynthesis and store it in plant tissue, thus helping to counteract global warming. Trees also break up the impact of heavy tropical rainfall, allowing infiltration and minimising soil-eroding surface runoff. What can rainforests provide without being destroyed? (4) Without being destroyed, rainforests can provide edible foods such as wild fruits and vegetables, as well as honey and meat e.g. from monkeys that live in the rainforests. Rainforests offer some protection from floods as they increase interception and infiltration and also reduce the likelihood of soil erosion. They are important for providing a home for many different species of animal and bird, as well as providing a high level of biodiversity and maintaining food chains and ecological links. ...read more.

Middle

The five countries with the largest rainforest areas are also among the world's most heavily indebted countries. As most tropical rainforests are located in developing countries that have large debts to pay off, the level of deforestation is often high as the increased demand for hardwoods has also increased the price of the timber, and so many countries take a short term view and allow unregulated use of their forest resources in order to finance those debts. Deforestation also occurs to provide land for rubber plantations, cattle ranches for beef farming, soya plantations and roads and railways. With increased demand for beef products from MEDCs, much of the rainforest has been cleared for cattle ranches as countries can often earn more from exporting beef products than timber. Again, the increased demand has increased the price at which beef products are sold at, and this can help with the debt burdens facing many LEDC countries with tropical rainforest. The need for roads and other transport links can cause deforestation, as paths are often cleared through the tropical rainforest in order to shorten journeys and thus reduce the costs of production for many companies who are transporting goods. ...read more.

Conclusion

Countries experiencing rapid population growth tend to put pressure on the land covered by the forests, which are often viewed as ?wasted? land, and so cut down the trees and burn them to release the nutrients. In Indonesia, the transmigration policy encouraged people to move from the overcrowded island of Java to less populated islands such as Sumatra, where rainforest was cleared away to make way for settlements and agriculture. Can forests be managed in a sustainable way? Possible solutions to the problems facing tropical rainforests include: * Replanting of degraded land, which improves soil, increases biodiversity and reduces erosion. * Education programmes for LEDC populations- a bottom up approach is more successful in the long run than top down * Continued research into the structure and function of the tropical rainforest, as well as its biodiversity * Encourage the use of trees as main crops in order to maintain nutrient cycles * Eco tourism should be encouraged- brings in tourists and educates tourists not to expect developed world standards when in a tropical rainforest ecosystem * Land reform- governments of some countries need to redistribute land more fairly to prevent a huge divide between large landowners and landless peasants. Without reform, it is more likely to result in instability within a country ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Environmental Management section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Environmental Management essays

  1. Evaluate the impact of deforestation in Indonesia.

    The traditional landowners were not informed and representations by the Moi to the local government, the army, and the company and forestry service have had no effect. None of them will recognise any form of land rights by the Moi people.

  2. What are the effects of Deforestation?

    For example, in data collected from the Cerado region of Brazil, K+ exchangeability was found to be 0.14 milliequivalents per 100g in the A Horizon (Mendonca, Eduardo S. & Rowell, David L. (1996), "Mineral and Organic Fractions of Two Oxisols and Their Influence on Effective Cation-Exchange Capacity" Soil Science Society of America Journal, 60(6)).

  1. Deforestation in Amazonia

    If the land that has been deforested due to timber being in great demand economically is turned into cattle ranches and plantations, local people would benefit from this as many jobs will be created. Workers will improve their standard of living from this as plantations will allow vital crops such as sugar, coffee and rubber plants to be grown.

  2. Should the Brazilian government allow continuation of further development in the Amazon rainforest?

    trees to intercept the rain, so this will cause flooding and will eventually lead to soil erosion. Also, there won't be any trees to transpirate, and this will produce less water vapour. A process known as desertification leaves soil with a lack of nutrients and vegetation.

  1. Contemporary issue assignment

    The Environmental Protection and Preservation Act of Maldives (4/93) provided the basic framework for the Environmental Impact Assessment (EIA) process in the Maldives and under Article 5 (1) of the Act, an impact assessment study shall be submitted to the Ministry of Planning, Human Resources and Environment (MPHRE)

  2. The Loss Of Tropical Rainforests: Solutions and ideas Case study: Brazil

    Obviously, Brazil's economy is dependent on cattle ranching, and it is making a profit for the country, and yet forest gets cleared for cattle ranching, after a year or so, it loses his nutrients and stalks to anchor the soil and so ranchers move on, and then the topsoil gets

  1. Tropical Rainforest - Case Study

    and then just leaving it they could clear and area and then their cattle graze their and then more on. But as they are grazing in a different area their will still be enough minerals and nutrients in the soil for the rain forest to grow back where the forest was first cleared.

  2. Virgin Atlantic Sustainable Development Global Warming

    This change to an aircrafts landing procedure would save about 200 kilograms of fuel on each landing alone, according to research conducted by NASA (2005). The only problem with the continuous descent of aircraft is the crowded airspace that surrounds airports, especially the more hectic airports such as Gatwick and Heathrow.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work