← Biodiversity Test
5 Written Questions
5 Matching Questions
- Species Evenness
- Indicator species
- Evolutionary species concept
- Habitat Destruction
- Biological species concept
- a Biggest reason for current increase in extinction is habitat loss
Conversion of forest to farmland, cities, etc.
Only 1/5 of remaining forest is old growth.
Loss of habitat due to mining, dams, destructive fishing practices
Habitat is fragmented into small, scattered plots
- b tied to specific communities or successional stages
- c organisms that breed in nature and produce fertile offspring
Concept has severe limitations
- d defines species in terms of evolutionary history
- e relative abundance of individuals within each species
If one or a few species are dominant (most abundant), the community is said to have low diversity
5 Multiple Choice Questions
- Benefits of Biodiversity; Wild plants could provide new sources of food or more genetic diversity for existing crops.
- By 1890's, most states had enacted some hunting and fishing laws; General idea was pragmatic, not aesthetic or moral preservation.; Only game species were managed; Predators were exterminated; In general, regulations have been extremely successful.; White tailed deer; Wild turkey
- is a population of organisms that is considered distinct for purposes of conservation. Delineating ESU's is important when considering conservation action. This term can apply to any species, subspecies, geographic race, or population.
Ex: There are several ESU's of Chinook salmon
- 1975; Regulates trade in living specimens and products derived from listed species; Currently lists 700 species threatened with extinction by international trade; Gorillas, elephants, rhinos, most big cats
- a group of organisms so similar to one another that they can breed and produce fertile offspring
5 True/False Questions
Endangered → Any animal species that has been absent from the state as a naturally occurring breeding population for over 10 years, but exists elsewhere as a wild population.
Biodiversity Hotspots → Tropical rainforests and coral reefs are biodiversity hotspots. 34 hotspots (1.4% of world's land area) contain 75% of the world's most threatened mammals, birds and amphibians.
Invasive Species Animals → 2nd biggest reason for current increase in extinction
Invasive (exotic) organisms thrive in new territory where they are free of usual predators, diseases, or resource limitations that limited them in original habitat.
Over past 300 years, approximately 50,000 non-native species have become established in the U.S.
At least 4,500 are free-living (non-domesticated).
15% cause environmental damage - we call them invasives
Island ecosystems are particularly susceptible
Jack pine forests → need to undergo prescribed burns
Umbrella species → species has major effect on other members of community