- Annual Symbposium (Online): 20 November 2020
Speakers: T. Takada, H. Tomimatsu, F. Ishihama, H. Yokomizo, R.P. Shefferson - Annual Symposium and Workshop: 8-9 November 2019
Speakers: H. Iijima, R. Kaneko, K. Morita, R. Oizumi, R.P. Shefferson, Y. Tachiki - Semiannual Workshop: 7-9 June 2019
- Annual Symposium and Workshop: 9-10 November 2018
Speakers: Y. Kawai, R. Shefferson, M. Shimada, T. Takada, M. Umezaki, H. Yokomizo
R Package lefko3
Lefko3 is an R package designed to produce historical and ahsitorical matrix projection models (MPMs), where historical MPMs are large matrices that incorporate 3 consecutive time steps in each matrix. These matrices allow the history of the individual to be more completely modeled within population dynamics models, which is important given that MPMs typically assume no influence of differences in individual history on population dynamics.
Package lefko3 works on R 3.6.3 or greater on all systems that support R, including Windows, MacOS, Linux, and Unix. The package is currently available for download through CRAN, with documentation available here. See our paper describing it in Methods in Ecology and Evolution.
Current version: 3.1.2 (available from 16 November 2020).
New in this version: Environmental and individual covariates. Re-parameterized negative binomial distribution. Inclusion of zero-inflated Poisson and negative binomial distributions. Expansions and corrections to vignettes.
Known issues: Modelsearch on GLMs using zero-inflated Poisson or zero-inflated negative binomial response may fail to build reduced models, leading to adoption of the global model (mixed models are not affected, nor are models with any other response distributions.
Next version: 3.2.0 (expected late December 2020).
Currently on the drawing board: Inclusion of deVries and Caswell (2018) hMPM format. Stochastic analysis. Selection gradients. Density dependent vital rates.
Additional tutorial materials: Intro to lefko3 with an analysis of Cypripedium candidum
Power Demography
Power Demography is a semiannual event incorporating workshops aimed at showcasing the cutting edge in demography, and at training the next generation of demographers. Meetings occur in May/June and November. All Power Demography events include workshops taught by leaders in the field, and the series is capped off in November with a symposium disseminating the best current research. Events are held at the University of Tokyo's Komaba Campus, and participants are asked to register.