6.5 Ecosystems Flashcards
1
Q
What is Succession
A
directional change in vegetation over time
2
Q
What is a sere
A
recognisable stage of succession
3
Q
Name 3 primary seres
A
Lithosere - bare rock
Hydrosere - water
Xerosere - sand
4
Q
Name for the first organism to colonise a primary sere
A
Pioneer species
e.g. Lichen / algae
5
Q
Interspecific competition
A
New species outcompete the organisms already there
6
Q
What is deflective succession?
A
Managing a particular seral stage for conservation
e.g. introduce grazing animals to keep grass short
7
Q
A
