Populations And Succession Flashcards
1
Q
What are 2 density dependent factors
A
Predation, disease, competition for food and resources
2
Q
Why are populations monitored?
A
To ensure continued supply of food and raw materials, to be aware of pest species growing, measure of pollution levels by indicator species and to determain whether a species is in danger of extinction and if conservation is needed
3
Q
As each stage in succession changes what increases with it
A
Fertility of soils, biomass, species diversity, complexity of food webs
4
Q
What is the first stage called
A
The pioneer community
5
Q
What are the initial colonisers in most cases
A
Lichens
6
Q
What is the final stage called
A
Climax
7
Q
What is 2 density independent factors
A
Temperature, droughts, flooding, natural disasters
