Stability & Change

Question 1

Define stability

Answer 1

Stability refers to the ability to maintain or support systems and processes continuously over time. Steady conditions with a continuous supply of rainfall and sunlight, combined with warm temperatures have ensured stability for many ecosystems.

Question 2

What does the structural and functional stability of an ecosystem depend on? Outline the 5 major factors

Answer 2

Nutrient cycling without leakages, individual species (esp keystone) must have high genetic diversity so populations can survive selection pressures, climate variables (eg precipitation) within tolerance limits, absence of disruptions which would interfere with sustainability, steady supply of energy

Question 3

Define genetic diversity

Answer 3

Refers to a range of genetic material present in a gene pool or population of species

Question 4

Give 4 examples of disruptions in ecosystems

Answer 4

Érosion, harvesting and removal of materials, eutrophication, poaching and selective removal