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25 Cards in this Set

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Biotic

relating to or resulting from living organisms

abiotic

physicalrather than biological not derived from living organisms

Stochastic event Eg

droughts, flood, fire , famine

dissolution

when a breeding pair or group of animals no longer interact with each other

dispersal

movement from birthing site to their breeding site or from one breeding site to another

genetic variability

the likelihood of different genetic characteristics in a population

continuity in time

a habitat or population with a long uninterrupted presence

fecundity

the fertility within a population

National legislation

environment act 1995


wildlife and countryside act 1981

international legislation

Cites

National organisation

rspb


wildlife trust

international organisations

icun


wwf


divergent

the evolution of 2 species from the same original species who adapt along different paths to utilise their environment


eg


arctic fox and red fox

convergent

2 species of different origins which evolve along similar path


e.g.


dolphin Whales and sharks


butterflies and bats

parallel

2 species which evolve independently but maintain the same level of similarity e.g. mammoth and elephant


flying mammals

r species

quick breeding short lives

k species

slow big gaps long living

boom

increase in population

bust

decrease in population

scale

size of an ecosystem

individuals

a living organism

ecological niche

role within an ecosystem

deme

newly separated subspecies

size

number of inderviduals

form

physical characteristics