10.5061/DRYAD.DR34Q6V
Stump, Simon Maccracken
Yale University
Comita, Liza S.
Yale University
Smithsonian Tropical Research Institute
Data from: Interspecific variation in conspecific negative density
dependence can make species less likely to coexist
Dryad
dataset
2019
stochastic models
Modern coexistence theory
Conspecific negative density dependence
Janzen-Connell Hypothesis
National Science Foundation
https://ror.org/021nxhr62
NSF DEB 1457515
2019-07-18T00:00:00Z
2019-07-18T00:00:00Z
en
https://doi.org/10.1111/ele.13135
2079595 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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 simulationsThis 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.code_for_simulations.zipData and code for producing
figuresThis 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.code_and_data_for_figures.zip
Barro Colorado Island