Data from: Interspecific variation in conspecific negative density dependence can make species less likely to coexist
Stump, Simon Maccracken, Yale University
Comita, Liza S., Yale University, Smithsonian Tropical Research Institute
Published Jul 18, 2019 on Dryad.
Cite this dataset
Stump, Simon Maccracken; Comita, Liza S. (2019). Data from: Interspecific variation in conspecific negative density dependence can make species less likely to coexist [Dataset]. Dryad. https://doi.org/10.5061/dryad.dr34q6v
Conspecific negative density dependence (CNDD) is thought to promote plant species diversity. Theoretical studies showing the importance of CNDD often assumed that all species are equally susceptible to CNDD; however, recent empirical studies have shown species can differ greatly in their susceptibility to CNDD. Using a theoretical model, we show that interspecific variation in CNDD can dramatically alter its impact on diversity. First, if the most common species are the least regulated by CNDD, then the stabilising benefit of CNDD is reduced. Second, when seed dispersal is limited, seedlings that are susceptible to CNDD are at a competitive disadvantage. When parameterised with estimates of CNDD from a tropical tree community in Panama, our model suggests that the competitive inequalities caused by interspecific variation in CNDD may undermine many species’ ability to persist. Thus, our model suggests that variable CNDD may make communities less stable, rather than more stable.
Code for running simulations
This is a .zip file that contains all of the code for running the simulations described in our paper. The code was run using Matlab 2017.
Data and code for producing figures
This is a .zip file which contains the simulation data used to make the figures in our paper. It also contains data that was synthesized from two other sources, used to describe the impact of CNDD on species in Panama. The file also contains code which will produce all of the figures in our paper.
National Science Foundation, Award: NSF DEB 1457515