BIOL 465 Quiz 1 Verified Questions And Answers
A group of individuals that can potentially breed among themselves in the wild and not with individuals of other groups ANS Biological Species
A group of species that appear morphologically distinct from others ANS Morphological species
A grou...
BIOL 465 Quiz 1 Verified Questions And Answers
A group of individuals that can potentially breed among themselves in the wild and not with
individuals of other groups ANS Biological Species
A group of species that appear morphologically distinct from others ANS Morphological species
A group of individuals with unique similarities in DNA and evolutionary past ANS Evolutionary
species
the number of different species in a community ANS Species richness
A graph that plots species richness as a function of the total number of individuals that have
accumulated with each additional sample (cumulative) ANS species accumulation curve
The estimated number of species in an area based on an extrapolation fit from an accumulation curve
ANS Asymptotic richness
The number and relative abundance of species in a biological community (some member of
importance. ANS species diversity
Ecological units based on dominant vegetation in terrestrial systems, and in the sea, on ocean
currents, and patterns of primary productivity; useful for assessing global diversity and ecosystem
services ANS Biomes
Areas where exceptional concentrations of endemic species are undergoing exceptional loss of
habitat; 36 of them ANS Biodiversity hotspots
The amount of available energy in an area affects levels of diversity - climatically based energy
hypothesis; Potential evapotranspiration as an index of available energy (reflects energy available to
evaporate water to the atmosphere) ANS Species-energy relationships
, says that greater production should result in greater biological diversity; energy constrains richness
via trophic cascades ANS productivity hypothesis
Says that where there is more energy, there will be greater biodiversity; Physiological requirements
of organisms; solar energy affects organisms through their physiological response to temperature;
higher latitudes have mean conditions father from organismal optima ANS Ambient energy
hypothesis
Often a positive relationship between area and the number of species (for both continental and island
biotas) ANS species-area curve
Habitat loss and degradation; deforestation ANS Biggest single source of biodiversity pressure
on biodiversity
Species can move (redistributing because climate niches are shifting); they then need to colonize
somewhere else (can be human-induced); extirpation (losing a population; local adaptation (rapid
evolution) ANS Four ways biodiversity can change
Balance of speciation and extinction ANS Trends in global diversity
Alpha: # of species on average within assemblages; Beta: # of species on average between
assemblages; Gamma: # of species on average summed over all assemblages ANS 3 measures of
species diversity
The maintenance of regional biodiversity, humans are moving species around and causing biotic
homogenization ANS Compositional turnover
The nonrandom process of progressive species declines and losses; successive losses can reflect
progressive habitat degradation or direct cascading responses to previous species losses (secondary
extinctions) ANS Community disassembly
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