Climate effects and temperature thresholds for eucalypt flowering: A GAMLSS ZIP approach

Abstract

Long-term phenological studies are limited in Australia, and meta-analytic studies of these almost nonexistent (Chambers and Keatley, 2010a,b, Hudson, 2010a, Hudson and Keatley, 2010a). Eucalypts form the focus of known Australian phyto-phenological studies, as they are the dominant species both in a botanical and economic sense. This study extends the Generalised Additive Model for Location, Scale and Shape (GAMLSS) approach to incorporate the zero-inflated (ZIP) Poisson family and to study the flowering records of 8 eucalypt species, Eucalyptus camaldulensis, E. goniocalyx, E. leucoxylon, E. macrorhyncha, E. melliodora, E. microcarpa, E. polyanthemos and E. tricarpaa - with the aim, in par..