Symbiosis through exploitation and the merger of lineages in evolution

Law R & Dieckmann U (1998). Symbiosis through exploitation and the merger of lineages in evolution. Proceedings of the Royal Society B: Biological Sciences 265 (1402): 1245-1253. DOI:10.1098/rspb.1998.0426.

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Abstract

A model for the coevolution of two species in facultative symbiosis is used to investigate conditions under which species merge to form a single reproductive unit. Two traits evolve in each species, the first affecting loss of resources from an individual to its partner, and the second affecting vertical transmission of the symbiosis from one generation to the next. Initial conditions are set so that the symbiosis involves exploitation of one partner by the other and vertical transmission is very rare. It is shown that, even in the face of continuing exploitation, a stable symbiotic unit can evolve with maximum vertical transmission of the partners. Such evolution requires that eventually deaths should exceed births for both species in the free-living state, a condition which can be met if the victim, in the course of developing its defences, builds up sufficiently large costs in the free-living state. This result expands the set of initial conditions from which separate lineages can be expected to merge into symbiotic units.

Item Type: Article
Uncontrolled Keywords: Adaptive dynamics; Coevolution; Evolutionary transitions; Mutualism; Symbiosis; Vertical transmission
Research Programs: Adaptive Dynamics Network (ADN)
Bibliographic Reference: Proceedings of the Royal Society B: Biological Sciences; 265(1402):1245-1253 (7 July 1998)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 02:09
Last Modified: 23 Aug 2016 09:37
URI: http://pure.iiasa.ac.at/5340

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