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LC Biology > Ecology - Part 2 > Flashcards

Ecology - Part 2 Flashcards

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1
Q

Abiotic factors

A

Light intensity
Temperature
Humidity

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2
Q

Climatic factors

A

Day length
Rainfall
Wind

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3
Q

Edaphic factors

A

Soil pH
Humus content
Soil aeration

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4
Q

Biotic factors

A

Competition
Predation
Parasitism

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5
Q

Energy flow

A

From the sun

Lose 10% of energy from one level to the next

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6
Q

Limitation of the pyramid of numbers

A

Does not take into account the size of the organism

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7
Q

Benefits and importance of competition

A

Controls and limits the population size of a species

Important driving force in evolution by Natural Selection

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8
Q

Predator Adaptation

A

Ladybird
Strong powerful jaws
Allows them to grip and kill prey

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9
Q

Prey adaptation

A

Aphid
Green in colour
Provides excellent camouflage while feeing on leaves

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10
Q

Benefits and importance of predation

A

Controls and limits the populations size

Important driving force in evolution by Natural selction

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11
Q

Factors that affect human population

A

Food supply
Disease
War
Contraception

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12
Q

Nitrogen cycle

A 
Nitrogen fixation
Absorbing
Feeding
Decomposition
Nitrification
Denitrification
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13
Q

Chemosynthesis example

A

Nitrifying bacteria uses its own energy to produce food

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14
Q

The Carbon cycle

A 
Photosynthesis
Respiration
Feeding
Decomposition/Decay
Combustion/Burning
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15
Q

Air pollution example

A

Co2
Source: Burning fossil fuels
Effect: Greenhouse effect - Global warming - Acid Rain

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16
Q

Human impact on carbon cycle

A

Deforestation
combustion of fossil fuels
Increase in the human population

17
Q

control measures for air pollution

A

Use of renewable energy sources
Reforestation
Use of smokeless fuels
Replacing CFCs with chemicals that break down faster

18
Q

Ways of disposing waste

A

Storage
Destruction
Recycling

19
Q

Problems associated with waste disposal

A

disease causing micro organisms
Nutrients present in wastes may cause eutrophication
Dumps and landfills are unsightly

20
Q

role of micro-organisms in waste management

A

Bacteria and fungi decompose
Biodegradable - molecules broken down by micro-organisms
Example: Waste in landfills are covered with soil

21
Q

Examples of conservation relating to fisheries

A 
Problems: 
Overfishing
small mesh nets catch immature fish 
Fishing all year round does not allow time for fish to breed
Solutions: 
Quotas
Minimum mesh sizes
Closed seasons

LC Biology (24 decks)

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