Biodiversity II: Change

In the Ehrlichs' "rivet popper" hypothesis, the "rivets" are ______.

• a.individual organisms
• b.species
• c.ecosystems
• d.extinctions

There are many secluded places on Earth that are still like they were before humans.

• a.true
• b.false

Why should everyone care about impacting other species?

• a.They deserve a helping hand.
• b.They were on Earth before us.
• c.They play vital roles in ecosystem function.
• d.There are certain species that are valuable.

What is the best description of habitat fragmentation?

• a.Fragmentation splits up habitats into smaller patches that may eliminate some species that need more space.
• b.Fragmentation alters the home range sizes of animals so that they start invading spaces belonging to humans.
• c.Fragmentation upsets the natural balance of human habitats and habitats for other species, causing more overlap.
• d.Fragmentation converts habitats to parking lots, roads, and buildings that are not suitable habitat for some species.

Humans have caused the first major global changes on Earth.

• a.true
• b.false

Which statement best captures the outcomes of global changes, such as to climate?

• a.Global changes have negative impacts on all species and therefore reduce biodiversity.
• b.Global changes have positive impacts on all species and therefore increase biodiversity.
• c.Global changes may benefit some species, but are likely to reduce biodiversity in the long run.
• d.Global changes may harm some species, but are likely to increase biodiversity in the long run.

There are multiple ways that species respond to changes in global climate.

• a.true
• b.false

Which is the best byline to define the Anthropocene?

• a.The Age of Humans
• b.The Age of Extinctions
• c.The Age of Habitat Conversions
• d.The Age of Global Climate Changes

Environmental stewardship is largely the responsibility of ______ and ______.

• a.Environmental policy-makers and other authorities
• b.Citizens of the Earth and environmental decision-makers
• c.Indigenous tribes and other people living near natural areas
• d.Wildlife biologists and people interested in nature