Models included in the artemis package and when to use them

library(artemis)

  • eDNA_lm(): Fixed effects censored data model with Normal errors. Use when threshold of detection is greater than single copies of DNA and there are no grouping variables (random effects)

  • eDNA_lmer(): Mixed effects censored data model with Normal errors. Same as above, but there are grouping variables (random effects).

  • eDNA_zinf_lm/lmer(): Same as above, but the response is zero-inflated (has more zero values than expected under the normal model assumptions).

  • eDNA_count_lm/lmer(): Use when the threshold of detection is single copies of DNA. Requires the response to be converted to copy number (integer values).