Definitions- Ecosystems Flashcards

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1
Q

Sere

A

Each individual stage in the progression.

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2
Q

Succession

A

The change in a plant community through time.

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3
Q

Climatic climax

A

Where the plant species live in perfect balance with the current environment conditions.

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4
Q

Primary succession

A

Where vegetation begins to colonise a surface that has had no previous vegetation e.g. Lave flows.

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5
Q

Secondary succession

A

Where vegetation begins to colonise a surface which previously had vegetation e.g. Forest fire/ deforestation.

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6
Q

Xerosere

A

Primary succession on dry land.

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7
Q

Hydrosere

A

Primary succession in water.

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8
Q

Lithosere

A

Primary succession on bare rock.

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9
Q

Biome

A

An area with a distinctive climate and vegetation.

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10
Q

Ecosystem

A

A set of relationships between all the organisms and the non-living factors in a particular area.

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11
Q

Biomass

A

Total mass of living matter.

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12
Q

Biodiversity

A

The variety of organisms living in a particular area

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13
Q

Fragile environment

A

Ecosystems that are easily disturbed and can’t adapt to change e.g. Coral reefs

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14
Q

Biotic factors

A

Living organisms e.g. Birds

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15
Q

Abiotic factors

A

Non-living organisms e.g. Plants

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16
Q

Tropic level

A

Stages of a food chain or web

17
Q

Pioneer species

A

The first species to colonise an area e.g. Marram grass on sand dunes

18
Q

Psammosere

A

A primary succession on sand

19
Q

Niche

A

The function or position of a species within an ecological community

20
Q

Soil moisture budget

A

The balance between the water inputs and water outputs

21
Q

Micro habitat

A

Under stones, under logs, under hedges etc.