dorsal/arxiv
View SchemaNetwork Models of Phage-Bacteria Coevolution
| Authors | Martin Rosvall, Ian B. Dodd, Sandeep Krishna, Kim Sneppen |
|---|---|
| Categories | |
| ArXiv ID | q-bio/0609031 |
| URL | https://arxiv.org/abs/q-bio/0609031 |
| DOI | 10.1103/PhysRevE.74.066105 |
| Journal | Phys. Rev. E 74, 066105 (2006) |
Abstract
Bacteria and their bacteriophages are the most abundant, widespread and diverse groups of biological entities on the planet. In an attempt to understand how the interactions between bacteria, virulent phages and temperate phages might affect the diversity of these groups, we developed a novel stochastic network model for examining the co-evolution of these ecologies. In our approach, nodes represent whole species or strains of bacteria or phages, rather than individuals, with "speciation" and extinction modelled by duplication and removal of nodes. Phage-bacteria links represent host-parasite relationships and temperate-virulent phage links denote prophage-encoded resistance. The effect of horizontal transfer of genetic information between strains was also included in the dynamical rules. The observed networks evolved in a highly dynamic fashion but the ecosystems were prone to collapse (one or more entire groups going extinct). Diversity could be stably maintained in the model only if the probability of speciation was independent of the diversity. Such an effect could be achieved in real ecosystems if the speciation rate is primarily set by the availability of ecological niches.
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"abstract": "Bacteria and their bacteriophages are the most abundant, widespread and\ndiverse groups of biological entities on the planet. In an attempt to\nunderstand how the interactions between bacteria, virulent phages and temperate\nphages might affect the diversity of these groups, we developed a novel\nstochastic network model for examining the co-evolution of these ecologies. In\nour approach, nodes represent whole species or strains of bacteria or phages,\nrather than individuals, with \"speciation\" and extinction modelled by\nduplication and removal of nodes. Phage-bacteria links represent host-parasite\nrelationships and temperate-virulent phage links denote prophage-encoded\nresistance. The effect of horizontal transfer of genetic information between\nstrains was also included in the dynamical rules. The observed networks evolved\nin a highly dynamic fashion but the ecosystems were prone to collapse (one or\nmore entire groups going extinct). Diversity could be stably maintained in the\nmodel only if the probability of speciation was independent of the diversity.\nSuch an effect could be achieved in real ecosystems if the speciation rate is\nprimarily set by the availability of ecological niches.",
"arxiv_id": "q-bio/0609031",
"authors": [
"Martin Rosvall",
"Ian B. Dodd",
"Sandeep Krishna",
"Kim Sneppen"
],
"categories": [
"q-bio.PE",
"cond-mat.other"
],
"doi": "10.1103/PhysRevE.74.066105",
"journal_ref": "Phys. Rev. E 74, 066105 (2006)",
"title": "Network Models of Phage-Bacteria Coevolution",
"url": "https://arxiv.org/abs/q-bio/0609031"
},
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