Evolutionary and Ecological Trees and Networks

Details Evolutionary and Ecological Trees and Networks Evolutionary and Ecological Trees and Networks

2007-03-30

arxiv.org/abs/q-bio/0703067v1

in Nonequilibrium Statistical Mechanics and Nonlinear Physics, Ed. by O. Descalzi, O.A. Rosso and H.A. Larrondo. AIP Conferenc

Biology

Quantitative Biology

Populations and Evolution

6 pages, 5 figures. To appear in Proceedings of the Medyfinol06 Conference

Scientific paper

10.1063/1.2746728

Evolutionary relationships between species are usually represented in phylogenies, i.e. evolutionary trees, which are a type of networks. The terminal nodes of these trees represent species, which are made of individuals and populations among which gene flow occurs. This flow can also be represented as a network. In this paper we briefly show some properties of these complex networks of evolutionary and ecological relationships. First, we characterize large scale evolutionary relationships in the Tree of Life by a degree distribution. Second, we represent genetic relationships between individuals of a Mediterranean marine plant, Posidonia oceanica, in terms of a Minimum Spanning Tree. Finally, relationships among plant shoots inside populations are represented as networks of genetic similarity.

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