Life Processes In The Biosphere Flashcards
1
Q
Types of seres
A
Hydrosere
Lithosere
Psammosere
2
Q
What is a sere
A
Sequence of stages in ecological succession
3
Q
What are r selected species
A
Respond rapidly to low survival rates, reach sexual maturity quick, produce lots of young and disperse widely
4
Q
What are k selected species
A
Specie that recover slowly from decline in population
Reach sexual maturity when older
Produce few young
Live longer
5
Q
What are density independent factors
A
Factors where population density has no effect on chances of survival
6
Q
Examples of density independent factors
A
Drought
Flood
Volcanos
7
Q
What are density dependant factors
A
Factors where chance of survival of individuals is dependant on population density
8
Q
Example of density dependant factors
A
Food supply
Disease
