Biodiversity Chapter 21 Flashcards
Genetic diversity (or variation) is the raw material for what?
adaptation
What group has highly restricted distributions, are particularly vulnerable to
extinction?
Endemics (species that are found in only one location)
Biodiversity in almost every taxonomic group of organism ________ closer to the _________ and ___________ toward the __________?
Biodiversity in almost every taxonomic group of organism INCREASES closer to the EQUATOR and DECLINES toward the POLES
_________ and _________ are particularly vulnerable to _________ threats from introduced species?
LAKES and ISLANDS are particularly vulnerable to EXCTINCTION threats from introduced species
Biodiversity is important for humans give 3 examples.
Agricultural
Ecosystem services
Wild Food Sources
Ecosystem services examples are?
Plant pollination
Crop pest control
3 Biggest threats to biodiversity are?
- Habitat loss
- Overharvesting
- Introduction of exotic species.
What is the biggest threat to Biodiversity?
habitat loss
Wild fish populations are under threat from?
Overharvesting
Who relies on fish for protein?
humans
This is known as ___________________ because no-one owns the fishery?
Tragedy of the Commons
The exotic pet trade threatens biodiversity in two ways. What are they?
habitat loss
Wild animals being killed for food & terrestrial species like turtles, birds and plants are in danger.
Exotic species are not just plant or animals what two species being harmed by fungi?
cave hibernating bats
NorthAmericanbullfrog
What treaty no longer allows exotic pets (parrots, turtles, orangutans, etc.) to be imported from other countries?
Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) treaty
At-risk species are listed, protect a management plan created for recovery to the sustainable number under which Act in the U.S.?
Endangered Species Act