Shared Flashcard Set

Details

bio chapter 56
biodiversity
27
Biology
01/11/2010

Additional Biology Flashcards

 


 

Cards

Term
Review the formula for effective population size. Imagine a population of 1,000 small rodents. Of these, 300 are breeding females, 300 are breeding males, and 400 are non-breeding juveniles. What is the effective population size.
Definition
600
Term
The discipline that applies ecological principles to returning degraded ecosystems to more natural states is known as...
Definition
restoration ecology
Term
To date, scientists have roughly how many different organisms?
Definition
1.8 million
Term
Which of the following conditions is the most likely indicator of a population in an extinction vortex?
Definition
genetic measurements indicate a continuing loss of a genetic variation
Term
Which of the following is not one of the levels of biodiversity?
Definition
population diversity
Term
human use of prokaryotic organisms to help detoxify a polluted wetland would be an example of
Definition
bioremediation
Term
which of the following strategies would most rapidly increase the genetic diversity of a population in an extinction vortex
Definition
introduce new individuals transported from other populations of the same species
Term
which of the following terms includes species diversity, genetic diversity, ecosystem diversity and species richness
Definition
biodiversity
Term
what integrates ecology, physiology, molecular biology, genetics and evolutionary biology to conserve biological diversity at all levels
Definition
conservation biology
Term
according to the small-population approach, what would be the best strategy for saving a population that is in an extinction vortex
Definition
introducing individuals from other populations to increase genetic variation
Term
a movement corridor
Definition
unites otherwise isolated patches of quality habitat
Term
estimates of current rates of extinction
Definition
indicate that rates may be greater than the mass extinctions at the close of the Cretaceous period
Term
which of the following statements about biodiversity hot spots for plants is correct
Definition
they are locations that have high concentrations of endemic species
Term
what is the estimated number of extant species on Earth
Definition
10 million- 200 million
Term
one chief area of concern among biologists who use the small-population approach is
Definition
genetic diversity
Term
approximately what percent of the world's land area has been established as reserves to protect biodiversity
Definition
7%
Term
one characteristic that distinguishes a population in an extinction vortex from most other populations is that
Definition
its genetic diversity is very low
Term
according to the US endangered Species Act, the difference between an endangered species and a threatened one is that
Definition
an endangered species is closer to extinction
Term
overexploitation encourages extinction and is most likely to affect
Definition
large animals with low intrinsic reproductive rates
Term
the most serious consequence of a loss in ecosystem biodiversity would be the
Definition
loss of ecosystem services on which people depend
Term
extinction is a natural phenomenon. it is estimated that 99% of all species that ever lived are now extinct. why then do we say that we are now in a biodiversity crisis?
Definition
the current rate of extinction is high and human activities threaten biodiversity at all levels
Term
modern conservation science increasingly aims at
Definition
sustaining biodiversity of entire ecosystems and communities
Term
which of the following would be considered an example of bioremediation
Definition
adding seeds of chromium-accumulating plant to soil contaminated by chromium
Term
which of the following would be considered an example of bioremediation
Definition
adding seeds of chromium-accumulating plant to soil contaminated by chromium
Term
correct about landscape ecology
Definition
it is the application of ecological principles to land-use planning
Term
modern conservation science increasingly aims at
Definition
sustaining biodiversity of entire ecosystems and communitites
Term
the primary difference between the small-population approach and the declining-population approach to biodiversity recovery is
Definition
S-PA is interested in bolstering the genetic diversity of a threatened population rather than the environmental factors that caused the population's decline