Maintenance of genetic polymorphism: spatial selection and self-fertilization
Article Abstract:
Variable selection in space can lead to maintenance of genetic polymorphism, despite a high amount of self-fertilization. Conditions for a stable polymorphism for selection varying in space for selfing organisms are similar to those in random-mating populations, while maintenance of polymorphism from differential selection over time is much more restrictive, if not impossible. This was gleaned from an examination of a number of different examples and a comparison of their conditions for random mating, selfing and intragametophytic selfing.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1998
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Selection for overcompensatory plant responses to herbivory: a mechanism for the evolution of plant-herbivore mutualism
Article Abstract:
A model for the evolution of mutualism between plants and herbivores is presented. This model shows the reproductive strategy of monocarpic plants under the condition of strong and size-selective herbivory. The plants retain almost half of their reproductive sources and invest the other half for regeneration efforts when they suffer losses to herbivory. Herbivory, therefore, enhances plant fitness and plant selection favors traits that increase the probability of being eaten.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1992
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Scale-dependent responses to resource spatial pattern in simple models of consumer movement
Article Abstract:
Consumer movement reduce the measure of spatial distribution in spatial pattern formation dominated by behavioral aggregation. This was proven using a model for mobile consumer redistribution on one-dimensional, bounded, spatiallymixed resource. At equilibrium, this reduction is not dependent on scale. However, when a state away from equilibrium is reached, the reduction exhibit scale dependence.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1993
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