Journal ArticleDOI
The dimensionality of ecological networks
Anna Eklöf,Ute Jacob,Jason C. Kopp,Jordi Bosch,Rocío Castro-Urgal,Natacha P. Chacoff,Bo Dalsgaard,Claudio de Sassi,Mauro Galetti,Paulo R. Guimarães,Silvia B. Lomáscolo,Silvia B. Lomáscolo,Ana M. Martín González,Marco Aurélio Pizo,Romina Rader,Anselm Rodrigo,Jason M. Tylianakis,Diego P. Vázquez,Diego P. Vázquez,Stefano Allesina +19 more
TLDR
It is shown that accounting for a few traits dramatically improves the understanding of the structure of ecological networks, and matching traits for resources and consumers, for example, fruit size and bill gape, are the most successful combinations.Abstract:
How many dimensions (trait-axes) are required to predict whether two species interact? This unanswered question originated with the idea of ecological niches, and yet bears relevance today for understanding what determines network structure. Here, we analyse a set of 200 ecological networks, including food webs, antagonistic and mutualistic networks, and find that the number of dimensions needed to completely explain all interactions is small ( < 10), with model selection favouring less than five. Using 18 high-quality webs including several species traits, we identify which traits contribute the most to explaining network structure. We show that accounting for a few traits dramatically improves our understanding of the structure of ecological networks. Matching traits for resources and consumers, for example, fruit size and bill gape, are the most successful combinations. These results link ecologically important species attributes to large-scale community structure.read more
Citations
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Journal ArticleDOI
Ecological Networks Across Environmental Gradients
TL;DR: Taking spatial and temporal processes into account can further elucidate network variation and improve predictions of network responses to environmental change.
Journal ArticleDOI
Analysing ecological networks of species interactions.
Eva Delmas,Eva Delmas,Mathilde Besson,Mathilde Besson,Marie-Hélène Brice,Marie-Hélène Brice,Laura A. Burkle,Giulio Valentino Dalla Riva,Marie-Josée Fortin,Dominique Gravel,Dominique Gravel,Paulo R. Guimarães,David H. Hembry,Erica A. Newman,Erica A. Newman,Jens M. Olesen,Mathias M. Pires,Justin D. Yeakel,Justin D. Yeakel,Timothée Poisot,Timothée Poisot +20 more
TL;DR: An overview of tools that can be used to describe and compare the functional and dynamic roles of species based on their position in the network and the organization of their interactions as well as associated new methods to test the significance of these results are described.
Journal ArticleDOI
Inferring biotic interactions from proxies
Ignacio Morales-Castilla,Ignacio Morales-Castilla,Miguel G. Matias,Miguel G. Matias,Miguel G. Matias,Dominique Gravel,Miguel B. Araújo,Miguel B. Araújo,Miguel B. Araújo +8 more
TL;DR: This work proposes a conceptual framework to infer the backbone of biotic interaction networks within regional species pools, and concludes that preliminary descriptions of the web of life can be made by careful integration of data with theory.
Journal ArticleDOI
Complexity and stability of ecological networks: a review of the theory
TL;DR: The use of ecological-network models to study the relationship between complexity and stability of natural ecosystems is the focus of this review, highlighting the theoretical debate and the lack of consensual agreement.
Journal ArticleDOI
Macroevolutionary convergence connects morphological form to ecological function in birds.
Alex L. Pigot,Catherine Sheard,Catherine Sheard,Eliot T. Miller,Tom P. Bregman,Benjamin G. Freeman,Uri Roll,Uri Roll,Nathalie Seddon,Christopher H. Trisos,Christopher H. Trisos,Brian C. Weeks,Joe Tobias,Joe Tobias +13 more
TL;DR: The results establish the minimum dimensionality required for avian functional traits to predict subtle variation in trophic niches and provide a global framework for exploring the origin, function and conservation of bird diversity.
References
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Journal ArticleDOI
Simple rules yield complex food webs
TL;DR: This model extends the existing ‘cascade model’ and improves its fit ten-fold by constraining species to consume a contiguous sequence of prey in a one-dimensional trophic niche.
Journal ArticleDOI
Plant coexistence and the niche
TL;DR: Although it is unlikely that niche separation along environmental axes is the only mechanism of coexistence in any large community, the evidence now suggests that it plays a more significant role than has been previously appreciated.
Journal ArticleDOI
Habitat modification alters the structure of tropical host–parasitoid food webs
TL;DR: Altered interaction structure represents an insidious and functionally important hidden effect of habitat modification by humans, indicating that perturbation of the structure and function of ecological communities might be overlooked in studies that do not document and quantify species interactions.
Journal ArticleDOI
Invariant properties in coevolutionary networks of plant-animal interactions
TL;DR: This work hypothesizes that plant–animal mutualistic networks follow a build-up process similar to complex abiotic nets, based on the preferential attachment of species, and reveals generalized topological patterns characteristic of self-organized complex systems.