3.1 Introduction to Biodiversity Flashcards

1
Q

definition of biodiversity

A

the variety of life that occurs within an ecosystem

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2
Q

definition of species diversity

A

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3
Q

what can be used to describe and compare communities?

A

diversity indices

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4
Q

when comparing communities that are similar: what could low biodiversity mean?

A
  • pollution
  • eutrophication
  • recent colonisation
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5
Q

definition of habitat diversity

A

the range of different habitats in an ecosystem/biome

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6
Q

definition of genetic diversity

A

the range and richness of genetic material present in a population of a species

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7
Q

examples of habitats

A
  • forest
  • grassland
  • desert
  • mountain
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8
Q

what can a high level of genetic diversity indicate?

A

a higher probability that some individuals within a community possess the genes best suited to any changes in the environment

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9
Q

give an example of an animal/where it comes from with low genetic diversity. does it have a high/low risk of extinction

A

lemur - Madagascar
high risk of extinction

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10
Q

give an example of an animal/where it comes from with high genetic diversity. does it have a high/low risk of extinction

A

red fox - three continents (europe, america, asia)
low risk of extinction

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11
Q

why is quantification of biodiversity important?

A

conservation efforts
area of high biodiversity - can be identified, explored
area of low biodiversity - conservation tactics can be implicated

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12
Q

what is species richness?

A

a measure of the number of different species in an area
more species -> richer environment

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13
Q

what is species evenness?

A

the commonness or rarity of a species

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14
Q

what two variables contribute to species diversity?

A
  • species richness
  • species evenness
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15
Q

why is species diversity important?

A

high species diversity can be an indication of an ecosystem in balance
it can show
- resilience
- different species fulfill different roles within an ecosystem
- higher species diversity - higher genetic diversity

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16
Q

what are three things that make genetic diversity important

A
  • Adaptability
  • Survival
  • Evolution