ENVS 101 Final Exam Questions with Correct
Answers
genetic diversty Correct Answer-variety of same genes within a species
(most important)
species diversity Correct Answer-number of diff species within a
community
ecological diversity Correct Answer-richness & complexity of a
community
phylogenetic species concept Correct Answer-defines by genetic
similarity
evolutionary species concept Correct Answer-defines by evolutionary
history
benefits of biodiversity Correct Answer-Increased productivity
ecosystem stability
existence value
economy
threats to biodiversity Correct Answer-habitat destruction
fragmentation
,invasive species
pollution
human population growth
Overharvesting
predator/pest control
endangered species act 1973 Correct Answer-protecting biodiversity for
public
Criteria for identifying at risk species
directions for recovery
assistance to landowners
enforcement
endangered, threatened, Vulnerable
ESA recovery plans Correct Answer-Stabilize or rebuild populations
umbrella species Correct Answer-require large blocks of habitat
flagship species Correct Answer-humans emotionally attatched
ESA success Correct Answer-bald eagle
ESA controversy Correct Answer-timber industry & spotted owl
, habitat protection Correct Answer-better than species protection
principles for protecting biodiversity Correct Answer-1. protect enough
habitat
2. Manage at regional scales to accomodate disturbances
3. plan over centuries
4. Allow for human use without significant degradation
community structure Correct Answer-patterns of spatial distribution of
individuals, species, & communities
Abundance Correct Answer-number of individuals of a species in an
area
high diversity = low abundance
diversity indices Correct Answer-Combine richness and abundance
(evenness)
dominance & Information
Simpson index
distribution Correct Answer-random (resources)
uniform (competition)
Cluster (protection)
Answers
genetic diversty Correct Answer-variety of same genes within a species
(most important)
species diversity Correct Answer-number of diff species within a
community
ecological diversity Correct Answer-richness & complexity of a
community
phylogenetic species concept Correct Answer-defines by genetic
similarity
evolutionary species concept Correct Answer-defines by evolutionary
history
benefits of biodiversity Correct Answer-Increased productivity
ecosystem stability
existence value
economy
threats to biodiversity Correct Answer-habitat destruction
fragmentation
,invasive species
pollution
human population growth
Overharvesting
predator/pest control
endangered species act 1973 Correct Answer-protecting biodiversity for
public
Criteria for identifying at risk species
directions for recovery
assistance to landowners
enforcement
endangered, threatened, Vulnerable
ESA recovery plans Correct Answer-Stabilize or rebuild populations
umbrella species Correct Answer-require large blocks of habitat
flagship species Correct Answer-humans emotionally attatched
ESA success Correct Answer-bald eagle
ESA controversy Correct Answer-timber industry & spotted owl
, habitat protection Correct Answer-better than species protection
principles for protecting biodiversity Correct Answer-1. protect enough
habitat
2. Manage at regional scales to accomodate disturbances
3. plan over centuries
4. Allow for human use without significant degradation
community structure Correct Answer-patterns of spatial distribution of
individuals, species, & communities
Abundance Correct Answer-number of individuals of a species in an
area
high diversity = low abundance
diversity indices Correct Answer-Combine richness and abundance
(evenness)
dominance & Information
Simpson index
distribution Correct Answer-random (resources)
uniform (competition)
Cluster (protection)
