Unit 6.6- Populations and Sustainability Flashcards
1
Q
Carrying capacity definition:
A
The maximum population size that can be maintained over a period in a particular habitat
2
Q
What are the different phases of population growth?
A
- Lag phase
- Log phase
- Stationary phase
3
Q
Features of K-strategists:
A
- Low reproductive rate
- Slow development
- Late reproductive age
- Long lifespan
- Large body mass
4
Q
Features of R-strategists:
A
- High reproductive rate
- Quick development
- Young reproductive age
- Short life span
- Small body mass
5
Q
Interspecific competition:
A
Competition between individuals of different species
6
Q
Intraspecific competition definition:
A
Competition between individuals of the same species
7
Q
What is coppicing?
A
- Ancient practice of managing woodland
- Involves cutting down trees regularly whist leaving a stump to encourage growth
- Produces thin trunks
8
Q
What is pollarding?
A
- Like coppicing but the stem is cut higher up
- Herbivores then can’t eat the vegetation
9
Q
Advantages of coppicing:
A
-Replenishes woodstock in 7-20 years which is faster than replanting
10
Q
Disadvantages of coppicing:
A
Thin wood
11
Q
Advantages of rotational coppicing:
A
- Multiple niches
- High species richness
- Secondary succession
- Soil replenishment
12
Q
Disadvantages of large scale clear felling of trees:
A
- Destroys habitats on a large scale
- Reduces soil mineral levels
- Leaves soil susceptible to erosion
