B14b Communities and adaptations Flashcards

1
Q

What is an ecosystem?

A

Interaction of a community of living organisms with the
non-living parts of their environment

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2
Q

Name four things that plants compete for

A

Light
Mineral ions
Water
Space

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3
Q

Name three things animals compete for

A

Food and water
Space (territory)
Mate

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4
Q

What is interdependence?

A

Different species in an ecosystem depend on each other for resources, if one species is removed the community may be affected

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5
Q

What is a stable community?

A

All the biotic and all the abiotic factors are balanced
so that population sizes remain relatively constant

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6
Q

What are abiotic factors?

A

Non- living factors

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7
Q

What are biotic factors?

A

Living factors

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8
Q

State the abiotic factors that may affect an ecosystem

A

Light intensity
Temperature
Moisture
Soil pH and mineral content
Wind intensity and direction
Carbon dioxide level
Oxygen level

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9
Q

Why might light intensity affect an ecosystem?

A

Different plant species may have different optimum light intensities for growth
Light is needed for photosynthesis

Plants provide all the food for the ecosystem

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10
Q

Why might temperature affect an ecosystem?

A

Different species of plants and animals have different optimum temperatures for growth and survival

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11
Q

How does soil pH affect an ecosystem?

A

Certain plans grow better in acids or alkaline soils.
Can affect the appearance of plant eg hydrangea flowers

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12
Q

How does moisture level affect an ecosystem?

A

Many plants cannot survive in water logged soil as their roots cannot get oxygen for respiration
Some plants are adapted to live in high or low moisture areas

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13
Q

How does wind intensity affect an ecosystem?

A

Determines how far seeds can be dispersed by the wind.
Increases transpiration rates
Can affect the growth pattern of plants

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14
Q

How does soil mineral content affect an ecosystem?

A

Minerals are needed by plants to make amino acids and proteins
Animals gain their amino acids directly or indirectly from plants.

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15
Q

How does carbon dioxide concentration affect an ecosystem?

A

Higher carbon dioxide concentration leads to more plant growth
Global warming and destruction of habitats

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16
Q

How does oxygen concentration affect an ecosystem?

A

Aquatic animals cannot survive in areas wit low oxygen concentrations

17
Q

State the biotic factors that may affect an ecosystem

A

Food
New predators
New pathogen
Competition

18
Q

What are adaptations?

A

Features that enable organisms to survive in their environment

19
Q

Give three adpatations of the artic fox

A

Thick fur - reduces heat loss

White fur - camouflaged

Small ears - reduces heat loss, reduces surface area: volume ratio

20
Q

Why do elephants have large ears?

A

Large ears - increases heat loss

21
Q

Name the type of organisms that can live in extreme environments.

A

Extremophiles

22
Q

Give three examples of extreme environments

A

High temperature
High pressure
High salt concentrations

23
Q

State an example of where an extremophile bacteria can be found

A

Deep sea vents

24
Q

Define the term community

A

All the plants and animals living in an area

25
Q

Give the levels of organisation in an ecosystem

A

Individual, population, community ecosystem

26
Q

Define the term population

A

The individuals of the same species living in a habitat

27
Q

Within a community each species depends on other species for their food, shelter, pollination and seed dispersal.

What does this describe?

A

Interdependence

28
Q

Give three different types of adaptation

A

Structural

Behavioural

Functional