10.5061/DRYAD.GXD2547JV
Yang, Yinghui
0000-0002-3139-6277
Southwest Jiaotong University
Hui, Cang
0000-0002-3660-8160
Stellenbosch University
How competitive intransitivity and niche overlap affect spatial coexistence
Dryad
dataset
2020
competition asymmetry
intransitive loop
mean-field assumption
niche differentiation
pair approximation
spatial ecology
National Natural Science Foundation of China
https://ror.org/01h0zpd94
31700347, 11801470
National Research Foundation of South Africa*
89967
National Research Foundation of South Africa
89967
2020-11-30T00:00:00Z
2020-11-30T00:00:00Z
en
2364970 bytes
3
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Competitive intransitivity is mostly considered outside the main body of
coexistence theories that rely primarily on the role of niche overlap and
differentiation. How the interplay of competitive intransitivity and niche
overlap jointly affects species coexistence has received little attention.
Here, we consider a rock-paper-scissors competition system where
interactions between species can represent the full spectra of
transitive-intransitive continuum and niche overlap/differentiation under
different levels of competition asymmetry. By comparing results from pair
approximation that only considers interference competition between
neighbouring cells in spatial lattices, with those under the mean-field
assumption, we show that (1) species coexistence under transitive
competition is only possible at high niche differentiation; (2) in
communities with partial or pure intransitive interactions, high levels of
niche overlap are not necessary to beget species extinction; and (3)
strong spatial clustering can widen the condition for intransitive loops
to facilitate species coexistence. The two mechanisms, competitive
intransitivity and niche differentiation, can support species persistence
and coexistence, either separately or in combination. Finally, the
contribution of intransitive loops to species coexistence can be enhanced
by strong local spatial correlations, modulated and maximised by moderate
competition asymmetry. Our study, therefore, provides a bridge to link
intransitive competition to other generic ecological theories of species
coexistence.
This dataset contains the analyses of pair approximationthe (PA) model,
codes of drawing Figure 3 and numerical solution datas. It is performed
by Matlab R2014a.
Code of calculating the change in invasion growth rate under pair
approximation (PA) model The ZIP archive contains three kinds of files:
(1) The numerical solution of the main program
("PAsimulation.m"). It is used to set parameter values and run
all the sub codes. (2) Calculation of Ri and Ri,-j, where i=1,2,3,
j=1,2,3 and j ≠i. They are files "PAr_i.m" and
"PAr_iLj.m". (3) The nested functions used in calculation
process of step (2). They are files "f_i.m" and
"f_iLj.m". Programs of drawing Figure 3 Detail contents of how
to draw Figure 3 in main text. It is the file
"Critical_region_for_PA_model.m". Numerical solution Data These
are numerical data abstained from the process of step (1).