Battle For The Biosphere
- Created by: Sophie Russell
- Created on: 01-06-13 10:52
The Biosphere
The biosphere is the part of the Earth's surface inhabited by living livings
A Biome is a world scale ecosystem
There are 9 different biomes, and each has its own wildlife, mainly determined by climate
Altitude- How high above sea level
Latitude- how high or low above the equator
Polar- Lacking in water and heat (tundra and alpine)
Coniferous forest seasonally lacking in water
Temperate- some areas seasonally or permanently lacking in water and heat
Tropical- biomes [promote growth all year round
Factors affecting precipitation and temperature
Temperature- Is the main factor affecting plant growth
Precipitation- happens at low pressure belts. Most rainfall is at the equator and mid latitudes such as the UK. Forest grows in both of these areas.
Altitude- temperatures decrease by 1 degree celsius for every 100km in height
Continentality is the effect of distance from the sea and is also important
away from the sea, the land heats up in the hot season and cools quickly in the cold season, increasing annual temperature range. However, by the sea, the sea cools nearby land in the hot season, and warms it in the cold, reducing the annual temperature range
At the poles, there is high pressure, the sun's rays are less intense and are spread over a wider area, causing cooler temperatures
At the tropic of cancer and Capricorn and the equator, there is low pressure and intense sun rays. The high angled rays are over a small concentrated area, causing hotter temperatures
Factors affecting precipitation and temperature
Ocean currents- Warm currents bring a warmer climate, cooler currents bring cooler climates.
Albedo-colour of the land- Dark colours (sea) warm up quicker, but light colours (ice) reflects the sun's rays
Coniferous Forest
Yakutsk, Russia/Northern Canada
Northern Hemisphere 50-70 degrees north
Mild summers, bitterly cold winters, sub-arctic
Largest temperature range of any climate on earth
Total annual precipitation is fairly small (500mm per year)
Conifers, Evergreen, spruces and pines which bear needles all year
WHY
High pressure and low rainfall
winter days short
sun not concentrated
removed from any moderating influence of an ocean
Tropical Rainforest
Iquitos Peru, equator, backed by mountains
Year round warm temperature and heavy rainfall
Annual temperature range rarely exceeds 3-4 degrees fahrenheit
High constant temperatures of 20-30 degrees Celsius
2000mm rainfall per year
50% of moisture in the amazon in self-circulating
Rain forests have the most types of trees in the world, 70% vegetation
WHY
Low pressure and rainfall
strong sun all year
transpiration generates 50% of own rain
The value of the biosphere
- The rain forest regulates the composition of the atmosphere, as it uses photosynthesis to exchange carbon dioxide into oxygen, purifying the air
- It maintains the health of the soil by intercepting precipitation, reducing soil erosion. It also prevents flash flooding
Goods of the Rain forest
Timber, fuel wood, food, crops, irrigation water, rubber, genetic resources (gene pool)
Services of the Rain forest
Maintaining biodiversity, nutrient cycling, climatic regulation, provides employment, recreation use e.g snorkeling
Delivering the goods
The main problem of biomes is that different people want to use the same biome in various ways. However, if over-exploited or over-harvested, the usage is not sustainable.
For indigenous people in the tropical rain forest, the biome supplies them with everything they need, for example fuel-wood, timber, herbs for medicine, food and meat. They can grow subsistence crops using the sustainable slash and burn method. This way, they do not over-cultivate the land, as the patch is only used until the soil is exhausted, and then the plot is recovered.
Rival commercial users can destroy the rain forest for short-term gain. TNCs exploit the forest by de-foresting for commercial goods such as rubber, cocoa etc. Drug companies search the forest for plants to provide new medicines. Governments might want to produce hydroelectric power from the forest.
Humans impacting the biosphere
THE CONGO
- The world's largest rainforest and 70% of Africa's plant cover
- Africa contributes to 50% of the world's de-forestation
What is threatening the tropical rain forest in the Congo basin?
1) subsistence agriculture
- sustainable slash and burn method is commonly used by poor farmers and villagers relying on the land
- An increase in forest population as people flee from civil unrest, and therefore rely on the resources of the forest, leading to de-forestation.
2) Logging
- 2004, encouraged by the world bank, the DR Congo announced its plans to step up the commercial logging of its rain forest
- The local people rarely know the worth of their land and are cheated out of money.
Humans impacting the biosphere
- Villagers were promised development of local buildings such as schools.
- It is also difficult to monitor exactly where the loggers have cut down trees. The checkers are only aided with bicycles as transport, and are not allowed to see records of logging.
3)Mining
- The Congo basin has rich mineral deposits
- oil, iron, copper, diamonds and gold
- Mining is poorly monitored and virtually no consideration is given to environmental impacts
DIRECT IMPACTS- deforestation, pollution, natural resources
INDIRECT IMPACTS- infrastructure, development, opens up area for poaching
4) Bush meat trade
- Any hunted meat from the rain forest
- More land for poaching has opened up due to de-forestation.
- Keystone species- is one which has a particularly large effect on other living organisms.
Mountain Gorillas
The Congo Basin
They are very important as they disperse billions of seeds which have higher germination and seed survival
The DR Congo has had the highest rise in bushmeat trade
They are hunted for bushmeat and trophies
Conservation of Biomes - what can be done?
1): WWF- NGO
Gorillas have been a flagship species for 50 years
- Funding anti-poaching patrols
- Increasing support for Gorilla conservation
- protect other species around the gorilla
- stopping illegal trade of gorilla products
2) reserve KOKOLOPORI BONOBO
- local villages and conservation groups work together to protect a wide variety of species and the pristine forests.
3)Controlling illegal logging
- Timber products from the DRC that are sold in the EU must carry a license showing a legal origin, expected to be finalised by 2013
GLOBAL ACTION
Conservation of Biomes - what can be done?
4) CITES-
- convention on International trade in endangered species, singed in 1973, 166 countries. The aim is to stop trade in products such as elephant ivory etc
- They are very difficult to manage as there are many conflicting interests
5) Sustainable management
Future- many of the solutions are ,long term, such as the zoning for tourism and conservation
Locals-They can make a living du to eco-tourism or farming in the buffer zone
Educate- people are taught about the importance of conservation and sustainable development
Environmentally friendly- It avoids clear cutting and destroying the forest. Trees are left to protect watersheds.
Make a living- People can farm inn the buffer zone on rotational basis. They can also earn money from additional tourism
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