The active removal of pollutants from the environment is called
restoration.
remediation.
rehabilitation.
reintroduction.
According to the figure below, restoration is most likely to occur spontaneously and without extensive human intervention in areas with
low productivity and high stress.
moderate productivity and moderate stress.
high productivity and low stress.
none of the above conditions.
Active intervention is likely needed to restore areas of high productivity and low stress because
such conditions could favor the rapid growth of invasive species.
there may be few seeds of native plant species present in such areas.
these conditions foster a higher rate of erosion.
None of the above
A restoration project may seek to
recreate historical conditions.
create habitat for particular species of conservation concern.
promote particular ecosystem functions.
achieve any of the above objectives.
Capturing sick or injured individuals from the wild, treating them, and releasing them back into the wild is called
captive breeding.
reintroduction.
rehabilitation.
translocation.
Hatcheries can be harmful to wild populations for all of the following reasons, except
hatcheries can quickly generate large numbers of individuals.
hatchery-raised individuals may be larger than wild individuals at the time of release.
hatcheries select for traits well suited to domestication.
hatcheries can reduce the genetic diversity of a population.
Zoos have become important players in conservation by
educating the urban public and eliciting broad support for conservation.
providing a last-ditch opportunity for captive breeding and possible reintroduction of highly threatened species.
paying detailed attention to the pedigree of individuals and managing worldwide collections as single populations for breeding purposes.
engaging in all of the above activities.
Efforts to breed and reintroduce the California condor have cost tens of millions of taxpayer dollars. Why might these efforts end up being unsuccessful?
Condors did not respond well to captive breeding efforts.
The continued use of lead ammunition, only recently banned, has caused lead poisoning of many condors.
Poaching of condors continues unabated.
All of the above
Which of these statements would not provide evidence of the shifting baselines phenomenon?
Younger fishermen recall best-ever catches that are smaller than those recalled by older fishermen.
Compared to their children, parents estimate the normal abundance of a species to be much lower.
Ecologists failed to recognize that a species was once abundant in an area they had tried to restore.
Molecular studies revealed that a high amount of genetic diversity persists among the few remaining Toromiro trees.
According to the figure below, restored sites
provide greater levels of regulating ecosystem services than degraded sites but lower levels than reference sites.
support higher levels of ecosystem function than both degraded and reference sites.
harbor greater biodiversity than reference sites but less than degraded sites.
