ecome techniques Flashcards
Chao index
to calculate max species richness
species effort curve
To compare the species richness of different areas
rarefaction
after species effort curve to extrapolate number of species for a certain sample size
kriging
Technique to predict spatial locations that you didn’t measure. (how spatial patterns continue)
semivariogram
function that relates semivariance (or dissimilarity) of locations to distance that separates them (spatial statistics/patterns)
spatial autocorrelation
to test spatial similarity in an area (does the tree have grass next to it or another tree)
Semivariance analysis
same as spatial dissimilarity analysis, tests spatial dependency and creates a semivariogram
MaxEnt
has to do with species distribution. you calculate the probability that a species is present given environmental variables. You use it with presence only data
Resource selection ratios
Has to do with species distribution. You calculate the resource selection rate which says something about if there is selection or not. You quantify habitat use.
Resource selection function
method to identify areas within landscapes that are (frequently) occupied by a population of a species, assuimg the reason is resources
Jolly Saber
To know population size
Peterson
To know pupulation size
Schnabel
To know population size
Scaled schoenveld residuals
test to see if groups are proportional, so you know if you can use Cox proportional hazard model
Cox proportional hazard model
It models a survival function that predicts the probability that an event occurs at a given time t. It can compare two or more groups and also adjusts for covariates. (has to do with survival analysis)
