poptrend: Analyze population trends from survey count data.

poptrendR Documentation

Analyze population trends from survey count data.

Description

The package provides functions for fitting and analysing trend models of data obtained from population count surveys.

Details

The package provides functions for estimating smooth trends with generalized additive mixed models, as well as linear trends and population indices. It is intended as a simple interface to basic trend estimation, allowing estimation of trends accounting for effects of covariates in the form of both smooth terms and random effects. The model fitting engine is the function gam of package mgcv. Background for the package is given in Knape (2016).

References

Knape, J. 2016. Decomposing trends in Swedish bird populations using generalized additive mixed models. Journal of Applied Ecology, 53:1852-1861. DOI:10.1111/1365-2664.12720.


poptrend documentation built on Nov. 22, 2023, 5:08 p.m.