BIOL 2260 Midterm Exam – Questions With Right
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Modification by early colonisers makes a site less suitable by later species
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1 Inhibition 2 Ecology
3 Calibration 4 Ecological density
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Terms in this set (134)
Ecology The study of the distribution and abundance of
organisms and the flows of energy and materials
between abiotic and biotic components of
ecosystems
Demography the study of rates of births and deaths, age and sex
structure, and distribution
, Population a group of potentially interbreeding individuals
inhabiting a specific area
Density the number of individuals per unit area
Ecological density the number of individuals per unit area of suitable
habitat
Crude density the number of individuals with no regard for variation
in habitat
Quadrat sampling used when the area of the quadrat is known and the
organisms are relatively immobile during sampling
Mark-recapture used when animals are mobile, so they mark and
release animals and then resample to see what
proportion of animals carry marks
Lincoln-Peterson index one way to use mark-recapture data to estimate
population size (M/N = m/n)
Accuracy refers to how close an estimate is to the true value
Precision refers to how close repeated estimates are to each
other
Confidence interval a range of values that contains the estimated
parameter a high proportion of the time
Calibration When an index is related to the population size
Morisita's index expresses how many times more likely that two
individuals will occur in the same quadrat compared
to a random distribution
Rate of increase an indicator of direction and pace of numerical
change, but also a measure of population vigour
Solutions
Save
Practice questions for this set
Learn 1 /7 Study using Learn
Modification by early colonisers makes a site less suitable by later species
Choose an answer
1 Inhibition 2 Ecology
3 Calibration 4 Ecological density
Don't know?
Terms in this set (134)
Ecology The study of the distribution and abundance of
organisms and the flows of energy and materials
between abiotic and biotic components of
ecosystems
Demography the study of rates of births and deaths, age and sex
structure, and distribution
, Population a group of potentially interbreeding individuals
inhabiting a specific area
Density the number of individuals per unit area
Ecological density the number of individuals per unit area of suitable
habitat
Crude density the number of individuals with no regard for variation
in habitat
Quadrat sampling used when the area of the quadrat is known and the
organisms are relatively immobile during sampling
Mark-recapture used when animals are mobile, so they mark and
release animals and then resample to see what
proportion of animals carry marks
Lincoln-Peterson index one way to use mark-recapture data to estimate
population size (M/N = m/n)
Accuracy refers to how close an estimate is to the true value
Precision refers to how close repeated estimates are to each
other
Confidence interval a range of values that contains the estimated
parameter a high proportion of the time
Calibration When an index is related to the population size
Morisita's index expresses how many times more likely that two
individuals will occur in the same quadrat compared
to a random distribution
Rate of increase an indicator of direction and pace of numerical
change, but also a measure of population vigour
