populations in ecosytems Flashcards
1
Q
define niche
A
the role a species plays in a habitat
2
Q
what is genetic drift
A
when a species is randomly seperated by a geographical element- e.g a river that causes new specis to be created due to geographical iscolation and selective pressures from an enviroment
3
Q
what is primary succsession
A
where their is a new stech of land where a pioneer species grows such as moss
4
Q
what is secondary succession
A
where a pre-existing climax comminty has been killed off due a natural disaster e.g forestfire and new plants grow
