Living World Flashcards

1
Q

Ecosystem

A

The living and non-living parts of an environment and the interrelationships that exist between them

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2
Q

Biomes

A

Global-scale ecosystems

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3
Q

Adaptations

A

The way that plants evolve to cope with certain environmental conditions such as excessive rainfall.

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4
Q

Producers

A

Organisms that obtain their energy from a primary source such as the sun.

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5
Q

Consumers

A

Organisms that obtain their energy by eating other organisms.

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6
Q

Food chain

A

A line of linkages between producers and consumers.

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7
Q

Food web

A

A diagram that shows all the linkages between producers and consumers in an ecosystem.

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8
Q

Scavengers

A

Organisms that consume dead animals or plants.

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9
Q

Decomposers

A

Organisms such as bacteria that break down plant and animal matter.

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10
Q

Nutrient cycling

A

The recycling of nutrients between living organisms and the environment.

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11
Q

Temperature deciduous forest

A

Forests made up of broad-leaved trees such as oak that drop their leaves in the autumn.

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12
Q

Stratification

A

Layering of forests, seen particularly in temperate deciduous forests and tropical rainforests.

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13
Q

Tropical Rainforests

A

The natural vegetation found in the tropics, well suited to the high temperatures and heavy rainfall of these latitudes.

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14
Q

Leaching

A

The dissolving and removal of nutrients from the soil, often in tropical rainforests because of the heavy rainfall.

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15
Q

Arid

A

Dry conditions typically associated with deserts.

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16
Q

Hot deserts

A

Deserts have a rainfall of less than 250mm per year. Hot deserts are generally found between 30°N and 30°S of the equator.

17
Q

Pollarding

A

Cutting of trees at about shoulder height to encourage new growth.

18
Q

Sustainable management

A

A form of management that ensures that developments are long lasting and non-harmful to the environment.

19
Q

Primary (virgin) rainforest

A

Rainforest that represents the natural vegetation in the region unaffected by the actions of people.

20
Q

Deforestation

A

The cutting down and removal of trees.

21
Q

Clear felling

A

Absolute clearance of all trees from an area.

22
Q

Selective logging

A

The cutting down of selected trees, leaving most of the trees intact.

23
Q

Transmigration

A

A population policy that aims to move people from densely populated areas to sparsely populated areas and provide them with opportunities to improve the quality of their lives.

24
Q

Slash and burn

A

A form of subsistence farming in tropical rainforests where some trees are felled and land is cleared by burning before being replanted.

25
Q

Selective Management System

A

A form of sustainable forestry management adopted in Malaysia.

26
Q

Conservation

A

The thoughtful use of resources; managing the landscape in order to protect ecosystems and cultural features.

27
Q

Ecotourism

A

Tourism that focuses on protecting the environment and local way of life. Also known as green tourism.

28
Q

Debt Relief

A

Many poorer countries are in debt, having borrowed money from richer countries to support their economic development. There is strong international pressure for the developed countries to clear these debts – this is debt relief.

29
Q

Debt

A

Money owed to others, to a bank or to a global organisation such as the World Bank.

30
Q

Carbon Sink

A

Forests are carbon sinks because threes absorb carbon dioxide from the atmosphere. They help to address the problem of global carbon emissions.

31
Q

Non-governmental organisation (NGO)

A

An organisation that collects money and distributes it to needy causes , e.g. Oxfam, ActionAid and WaterAid.

32
Q

Subsistence farming

A

Farming to produce food for the farmer and his/her family.

33
Q

Hunter-gatherers

A

People who carry out a basic form of subsistence farming by hunting animals and gathering fruit and nuts.

34
Q

Commercial farming

A

A type of farming where crops and/or livestock are sold to make a profit.

35
Q

Salinisation

A

The deposition od solid salts on the ground surface following the evaporation of water. Also an increase in the concentration of salts in the soil reducing fertility.

36
Q

Retirement migration

A

Migration to an area for retirement.