Partitioning density and size components of biodiversity effects

The R function densize (DENSIty and SIZE) partitions the net, complementarity, and selection effects of biodiversity into additive components that reflect diversity-induced changes in plant density and size.

Installation

#library(remotes)
remotes::install_github("communityecologist/densize")
library(densize)

Usage

densize(init.dens, final.dens, final.yield, germ.dens)

• init.dens : A matrix or data frame consisting of initial plant density (the number of plants or seeds sown per area).
• final.dens : A matrix or data frame consisting of final plant density (the number of plants survived per area).
• final.yield : A matrix or data frame consisting of final yield (yield per area).
• germ.dens : Optional. A matrix or data frame consisting of germination density (the number of seedlings emerged per area).

Run ?densize for detail.

Datasets

BioDivExpt.1
BioDivExpt.2

• BioDivExpt.1 : A dataset of a diversity experiment using annual plants. Five species were sown solely or in mixtures of two, three, or four species in planting pots at a total of 24 seeds.
• BioDivExpt.2 : A dataset of a diversity experiment using annual plants. Five species were sown solely or in mixtures of two, three, or four species in planting pots at a total of 72 seeds.

Run ?BioDivExpt.1 and ?BioDivExpt.2 for detail.

Examples

dat  <- BioDivExpt.1
res1 <- densize(dat$InitDens, dat$FinalDens, dat$FinalYield)
res2 <- densize(dat$InitDens, dat$FinalDens, dat$FinalYield, dat$GermDens)

Citation

Tatsumi S & Loreau M (in press) Partitioning the biodiversity effects on productivity into density and size components. Ecology Letters doi:10.1111/ele.14300.