Main Calculations and Essentials For ESS Flashcards
(38 cards)
N1 Lincoln index
Number of species captured and marked
N Lincoln index
Total estimated population
N2 Lincoln index
Total number of species recaptured
M Lincoln index
Total number of marked species within the recaptured sample
Lincoln index
N = n1 x n2 over M
D Simpson’s index
Species diversity index
N Simpson’s index
Total number of organisms of all species
n Simpson’s index
Total number of organisms of each species
Σ Simpson’s index
Τhe sum of
Simpson’s index formula
D = N ( N - 1) over Σn (n - 1)
Crude Birth Rate (CBR)
Number of births / population size x 1000
Crude Death Rate (CDR)
Number of deaths / population size x 1000
Natural increase rate
(Crude birth rate - crude death rate) / 10 *migration is ignored
Doubling time
70 / natural increase rate
Sustainable yield
annual growth and recruitment - annual death and emigration
Sustainable yield
Total biomass at t + 1 over energy - total biomass at time t - energy
Net primary productivity
Gross primary productivity - r (R = respiratory loss)
Productivity is measured
Per unit area per unit time. EG: per metre ^2 per year
Net secondary productivity
Gross secondary productivity - r (R = respiratory loss)
Ecotourism
Biodiversity is the subject of aesthetic interest. People rely on wild places and living things in them for spiritual fulfilment
Historic ozone depletion
Since ozone was first measured in the (??), reduction has been recorded. A reduction between 5-15% was recorded during the 1980s
Remediation
The action of providing a remedy to something, in particular the reversal or stop to environmental damage
Efficiency =
Work or energy produced / energy consumers
Efficiency =
Useful output / useful input (x 100 if you want percentage)
