Monitoring Flashcards

1
Q

Vad är NILS förnågot?

A

landskapsövervakning på nationell nivå

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2
Q

Beskriv “the living planet index”

A

Describes trends in population sizes for different species

*bias - counts natural fluctuation as a decline in population sizes

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3
Q

Describe “accidental” monitoring

A

Historical records, used today to allow us to get a picture how the landscape looked like before

Can be valuable, but also challenging:
- details of method unclear
- potential to describe “change” due to changes in method/location
- changes in species names etc

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4
Q

Examples of how to detect change - measurements

A
  • population size
  • population spatial structure
  • species diversity (richness/diversity)
  • species heterogeneity (beta-diversity)
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5
Q

describe species evenness

A

equitability/distribution of individuals

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6
Q

describe species richness

A

number of species

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7
Q

describe diversity indices

A

combines evenness & richness, ex simpsons (D = 1- n(n-1)/(N(N-1))

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8
Q

what does beta diversity measure?

A

spatial heterogeneity, change in species composition from place to place
ex,
- all sites have the same species –> low b-diversity
- different sites have different species –> high b-diversity

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9
Q

What are the 4 different sampling strategies?

A
  • Slumpvis stickprovstagning
    not biased, need a large sample size to make sure its representative
  • Stratifierad slumpvis stickprovstagning
    not biased, but need take count that your stratify might not be equally representative
  • Systematiskt stickprovstagning
    easy to decide sampling location, not best choice if there are systematic patterns in the community/species you monitor
  • Selektiv stickprovstagning
    efficient, defo biased
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