Biology Test Conservation Biology 4

Question 1

Trophic cascades in conservation biology demonstrate that:

Accepted Answer

The removal of top predators can trigger dramatic changes throughout the food web

Answer

When apex predators are removed, populations of their prey increase unchecked, leading to overgrazing or over-predation that restructures lower trophic levels.

Question 2

What is 'assisted migration' in the context of climate change conservation?

Accepted Answer

Deliberately relocating species to more suitable habitat ahead of climate-driven range shifts

Answer

Assisted migration (or managed relocation) moves species to new areas where projected future climates better match their requirements, helping them survive climate change.

Question 3

Which metric is used to estimate the biodiversity value of a habitat patch based on its isolation and size?

Accepted Answer

Species-area relationship (SAR)

Answer

The species-area relationship predicts species richness from habitat area, making it a practical tool for evaluating how much biodiversity a patch can support.

Question 4

In marine conservation, what does the term 'no-take zone' refer to?

Accepted Answer

Marine protected areas where all extractive activities including fishing are prohibited

Answer

No-take zones are the strictest class of marine protected areas, prohibiting all extraction to allow ecosystems and fish populations to recover.

Question 5

Which ecological concept explains why removing one species can cause a disproportionate collapse of an entire ecosystem?

Accepted Answer

Keystone species concept

Answer

Keystone species have an outsized effect on ecosystem structure relative to their biomass, so their loss can trigger cascading extinctions.

Biology Practice Test

Biology Practice Test

Biology Test Conservation Biology 4