BIO 320- Exam 1 Questions and Answers 100% Verified
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Module
BIO 320
Institution
BIO 320
Rank-abundance curves - Plot the relative abundance of each species in a community in rank
order from most abundant to least abundant
Species Accumulation Curve - Graph of the number of species observed in relation to the number
of individuals sampled
True or false; another way to estimate the ...
BIO 320- Exam 1
Rank-abundance curves - Plot the relative abundance of each species in a community in rank
order from most abundant to least abundant
Species Accumulation Curve - Graph of the number of species observed in relation to the number
of individuals sampled
True or false; another way to estimate the number of species in an area is based on the number of rare
species detected. - True
Biodiversity is built from what 3 features? - Ecosystem diversity, species diversity, genetic diversity
Species that lack genetic diversity are? - More vulnerable to fluctuations due to climate change,
disease, and habitat fragmentation.
True or false; Counting every individual of a species is common - False
True or false; Must sample an area to estimate how many species are present? - True
True or false; One way to sample is by graphing the number of species observed as sample size
increases? - True
Formula for estimating number of species living in an area - S= Sobs+f1(f1-1)/2(f2+1)
Estimated number of species in a community... - Increases with an increase in the number of
species represented by a single individual and decreases with an increase in the number of species
represented by 2 individuals
Relative Abundance - The proportion of individuals in a community represented by each species
, True or false; most species have a hight or low abundance? - False. Most species have
intermediate abundance
Frank Preston - Developed a way to visualize patterns of variation in abundance of different
species.
Log-normal Distribution - A bell-shaped curve that uses a logarithmic scale of the x-axis
True or false; log-normal distributions of species can be found across a wide variety of communities and
taxonomic groups - True
Rank-abundance curves are useful in? - Illustrating how communities differ in species richness and
species evenness
Species Evenness - Comparison of the relative abundance of each species in a community
Greatest evenness occurs when? - All species in a community have equal abundance
Lowest evenness occurs when? - One species is abundant and the remaining are rare
Rank abundance curves allow? - The determination of which communities have the greatest
species richness and evenness, how communities differ in richness and evenness
Communities with more species and greater evenness have? - Higher species diversity
Calculate species diversity with? - Simpson's index and Shannon's index
Simpsons and Shannons index both incorporate? - Species richness and evenness but in different
ways
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