Populations and sustainability: แบบฝึกหัด

Which of the following is an example of an abiotic factor that could limit the size of a plant population?

In the management of ecosystems for timber, what is the main advantage of selective felling compared to clear-felling?

In a managed woodland, foresters practice coppicing to produce a sustainable supply of wood. Which of the following biological principles best explains why coppicing is effective for sustainability?

Which of the following describes the difference between preservation and conservation?

Which of the following describes a density-dependent limiting factor?

State the term used to describe the maximum population size that a specific environment can support, as determined by limiting factors.

In the context of sustainable fishing, explain how the implementation of mesh size regulations for nets helps to maintain fish populations over time.

An ecosystem contains a population that has reached its carrying capacity. Explain how a sudden change in an abiotic factor, such as a significant decrease in temperature, would affect the population size and the subsequent role of intraspecific competition.

Ecosystems must be managed carefully to balance human needs with the maintenance of biodiversity.

(a) State one economic reason and one ethical reason for the conservation of biological resources. [2]

(b) Modern fishing practices can lead to the depletion of fish stocks. Outline one specific management strategy used to ensure that fishing is sustainable and explain how it prevents over-exploitation. [2]

(a) Explain the difference between the terms conservation and preservation in the context of biological resources. [2]

(b) Managing ecosystems for timber production can be done at different scales. Describe how the management techniques differ between small-scale timber production (such as coppicing) and large-scale commercial forestry, and explain how these methods ensure a sustainable supply of wood. [3]