Huisman–Olff–Fresco models explained

Huisman–Olff–Fresco models (HOF models) are a hierarchical set of 5 models with increasing complexity, designated for fitting unimodal species response curves^[1] on environmental gradient.^[2]

A implementation of the model including extension for bimodal distributions exists as an R module downloadable from CRAN.^{[3] [4]}

References

• Oksanen's introduction of HOF models, and software to compute them
• Rydgren . Knut . Økland . Rune Halvorsen . Økland . Tonje . Species response curves along environmental gradients. A case study from SE Norwegian swamp forests . Journal of Vegetation Science . Wiley . 14 . 6 . 2003-04-09 . 1100-9233 . 10.1111/j.1654-1103.2003.tb02220.x . 869–880.

Notes and References

1. Web site: SPECIES RESPONSE CURVES. Steven M. Holland. Department of Geology, University of Georgia, Athens, GA.
2. Huisman . J. . Olff . H. . Fresco . L.F.M. . A hierarchical set of models for species response analysis . Journal of Vegetation Science . Wiley . 4 . 1 . 1993 . 1100-9233 . 10.2307/3235732 . 37–46.
3. Jansen . Florian . Oksanen . Jari . Podani . János . How to model species responses along ecological gradients - Huisman-Olff-Fresco models revisited . Journal of Vegetation Science . Wiley . 24 . 6 . 2013-02-07 . 1100-9233 . 10.1111/jvs.12050 . 1108–1117.
4. Web site: eHOF: Extended HOF (Huisman-Olff-Fresco) Models . CRAN . 2020-05-22 . . 2021-04-30.