Which of the following scenarios would provide the most legitimate data on population density?
A) Count the number of nests of a particular species of songbird and multiply this by a factor that extrapolates these data to actual animals.
B) Count the number of pine trees in several randomly selected 10 m x 10 m plots and extrapolate this number to the fraction of the study area these plots represent.
C) Use the mark-and-recapture method to estimate the size of the population.
D) Calculate the difference between all of the immigrants and emigrants to see if the population is growing or shrinking.
E) Add the number of births and subtract the individuals that die to see if the population's density is increasing or decreasing.
How the study of genomes and proteomes can provide us with connections to different biological level
Invasive species provide an example of predator pressure.
The carbon cycle. Numbers are storage as 1015 g or fluxes as 1015 g per year (data from Schlesinger
Animal carcasses like this South African wildebeest provide important nutrition for both hunters and
Skilled nursing facilities provide care for patients requiring longer stays than hospitals allow.
Type II curve. Mortality does not vary with age. Data for five-lined skink (Eumeces fasciatus).