Abstract
The question whether communities should be viewed as superorganisms or loose collections of individual species has been the subject of a long-standing debate in ecology. Each view implies different spatiotemporal community patterns. Along spatial environmental gradients, the organismic view predicts that species turnover is discontinuous, with sharp boundaries between communities, while the individualistic view predicts gradual changes in species composition. Using a spatially explicit multispecies competition model, we show that organismic and individualistic forms of community organisation are two limiting cases along a continuum of outcomes. A high variance of competition strength leads to the emergence of organism-like communities due to the presence of alternative stable states, while weak and uniform interactions induce gradual changes in species composition. Dispersal can play a confounding role in these patterns. Our work highlights the critical importance of considering species interactions to understand and predict the responses of species and communities to environmental changes.
| Original language | English |
|---|---|
| Pages (from-to) | 1243-1252 |
| Journal | Ecology Letters |
| Volume | 22 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 2019 |
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Keywords
- Alternative stable states
- community organisation
- competition theory
- critical transitions
- environmental gradient
- Lotka–Volterra model
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Superorganisms or loose collections of species? A unifying theory of community patterns along environmental gradients. / Liautaud, Kevin; van Nes, Egbert H.; Barbier, Matthieu; Scheffer, Marten; Loreau, Michel.
In: Ecology Letters, Vol. 22, No. 8, 08.2019, p. 1243-1252.Research output: Contribution to journal › Letter › Academic › peer-review
TY - JOUR
T1 - Superorganisms or loose collections of species? A unifying theory of community patterns along environmental gradients
AU - Liautaud, Kevin
AU - van Nes, Egbert H.
AU - Barbier, Matthieu
AU - Scheffer, Marten
AU - Loreau, Michel
PY - 2019/8
Y1 - 2019/8
N2 - The question whether communities should be viewed as superorganisms or loose collections of individual species has been the subject of a long-standing debate in ecology. Each view implies different spatiotemporal community patterns. Along spatial environmental gradients, the organismic view predicts that species turnover is discontinuous, with sharp boundaries between communities, while the individualistic view predicts gradual changes in species composition. Using a spatially explicit multispecies competition model, we show that organismic and individualistic forms of community organisation are two limiting cases along a continuum of outcomes. A high variance of competition strength leads to the emergence of organism-like communities due to the presence of alternative stable states, while weak and uniform interactions induce gradual changes in species composition. Dispersal can play a confounding role in these patterns. Our work highlights the critical importance of considering species interactions to understand and predict the responses of species and communities to environmental changes.
AB - The question whether communities should be viewed as superorganisms or loose collections of individual species has been the subject of a long-standing debate in ecology. Each view implies different spatiotemporal community patterns. Along spatial environmental gradients, the organismic view predicts that species turnover is discontinuous, with sharp boundaries between communities, while the individualistic view predicts gradual changes in species composition. Using a spatially explicit multispecies competition model, we show that organismic and individualistic forms of community organisation are two limiting cases along a continuum of outcomes. A high variance of competition strength leads to the emergence of organism-like communities due to the presence of alternative stable states, while weak and uniform interactions induce gradual changes in species composition. Dispersal can play a confounding role in these patterns. Our work highlights the critical importance of considering species interactions to understand and predict the responses of species and communities to environmental changes.
KW - Alternative stable states
KW - community organisation
KW - competition theory
KW - critical transitions
KW - environmental gradient
KW - Lotka–Volterra model
U2 - 10.1111/ele.13289
DO - 10.1111/ele.13289
M3 - Letter
VL - 22
SP - 1243
EP - 1252
JO - Ecology Letters
JF - Ecology Letters
SN - 1461-023X
IS - 8
ER -