ess 3 Flashcards

1
Q

biodiversity

A

variation of habitats, species and genes within an area

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2
Q

genetic diversity

A

variation of genes within a species

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3
Q

species diversity

A

variation of species within an area

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4
Q

habitat diversity

A

variety of places where life exists within a location

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5
Q

hotspots

A

region with high levels of biodiversity under threat from human activity

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6
Q

speciation

A

formation of new species from natural selection.

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7
Q

natural selection

A

species with more favarouble genetics breed

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8
Q

isolation

A

species get separated - physical barriers (mountains, canyons)

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9
Q

factors to maintain biodiversity

A

complex ecosystems

succession

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10
Q

factors leading to loss of biodiversity

A

natural hazards
over exploitation
diseases

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11
Q

what makes a species prone to extinction

A

low reproduction rates
vulnerability
endangered

e.g - black rhinos - wanted for materials - habitat loss

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12
Q

CITES

A

treaty to protect endangered species

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13
Q

IUCN

A

international union for for conservation of nature - gives information of endangered species for conservation

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14
Q

extinct species example

A

DODO

  • easy prey couldn’t fly
  • humans destroyed habitats
  • captured - weren’t scared of humans
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15
Q

endangered species

A

OTTER

- tourism value - economic value

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16
Q

flagship species

A

easily recognisable species by characteristics

- giant panda

17
Q

keystone species

A

sea urchins and otters

- plays an important role in an ecosystem and if take out can collapse

18
Q

biomes

A

collection of ecosystems that share climatic conditions

19
Q

succession

A

change in species composition

20
Q

productivity

A

conversion of energy into biomass

21
Q

biotic factors

A

animals, plants, food

22
Q

abiotic factors

A

wind, temperature, light

23
Q

Lincoln index

A

capture, mark, release, recapture

- formula = population first capture x population of second / total marked