Main Calculations and Essentials For ESS Flashcards Preview

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Flashcards in Main Calculations and Essentials For ESS Deck (38):
1

N1 Lincoln index

Number of species captured and marked

2

N Lincoln index

Total estimated population

3

N2 Lincoln index

Total number of species recaptured

4

M Lincoln index

Total number of marked species within the recaptured sample

5

Lincoln index

N = n1 x n2 over M

6

D Simpson’s index

Species diversity index

7

N Simpson’s index

Total number of organisms of all species

8

n Simpson’s index

Total number of organisms of each species

9

Σ Simpson’s index

Τhe sum of

10

Simpson’s index formula

D = N ( N - 1) over Σn (n - 1)

11

Crude Birth Rate (CBR)

Number of births / population size x 1000

12

Crude Death Rate (CDR)

Number of deaths / population size x 1000

13

Natural increase rate

(Crude birth rate - crude death rate) / 10 *migration is ignored

14

Doubling time

70 / natural increase rate

15

Sustainable yield

annual growth and recruitment - annual death and emigration

16

Sustainable yield

Total biomass at t + 1 over energy - total biomass at time t - energy

17

Net primary productivity

Gross primary productivity - r (R = respiratory loss)

18

Productivity is measured

Per unit area per unit time. EG: per metre ^2 per year

19

Net secondary productivity

Gross secondary productivity - r (R = respiratory loss)

20

Ecotourism

Biodiversity is the subject of aesthetic interest. People rely on wild places and living things in them for spiritual fulfilment

21

Historic ozone depletion

Since ozone was first measured in the (??), reduction has been recorded. A reduction between 5-15% was recorded during the 1980s

22

Remediation

The action of providing a remedy to something, in particular the reversal or stop to environmental damage

23

Efficiency =

Work or energy produced / energy consumers

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Efficiency =

Useful output / useful input (x 100 if you want percentage)

25

Efficiency of assimilation

Gross productivity x 100 over food eaten

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Efficiency of biomass productivity

Net productivity x 100 over gross productivity

27

Aquatic food chain

Phytoplankton (dinoflagellates), Zooplankton (Shrimp), Tuna, Shark

Phytoplankton, Zooplankton (copepods), lantern fish, squid, tuna

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Food chain

Grass, grasshopper, frog, snake, hawk

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Tundra food chain

Grass, snowshoe hare, Canada lynx

30

Forest food chain

Grass, Deer, Wolf

31

Keystone species

Dominant predator whose removal allows prey population to explode decreasing overall diversity, altering the habitat around them

32

Umbrella species

Selected for making conservation related decisions, protecting these indirectly protects the many other species that make up the ecological community of its habitat

33

Carnivore

Animal that feeds on other animals or meat (Lion, wolves, tigers, hawks)

34

Herbivore

Animal that feeds on plants (Rabbits, deer, zebras)

35

Omnivore

Animal that eats both plants and animals (Humans, Bears)

36

Abiotic

Non-living, physical factors that influence the organisms and the ecosystem, eg: temperature, sunlight, pH, salinity, pollutants (how much space there is, availability of water, light etc)

37

Biotic

Living components of an ecosystem - organisms, their interactions or their waste, that directly or indirectas affect another organism (every relationship an organism may have, where it lives, How it responds to resources, predators, to competitors, how it alters these)

38

Carrying Capacity

The maximum number of A species that can sustainably be supported by a given area/habitat/environment