992 resultados para resource competition
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Information used/presented during the Improving Transition Outcomes Resource Mapping Workshops
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Resource Mapping tool from the Improving Transition Outcomes Resource Mapping Workshops
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Resource Mapping resources shared during the Improving Transition Outcomes Resource Mapping Workshops
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We characterize the set of Walrasian allocations of an economy as theset of allocations which can be supported by abstract equilibria that satisfy a recontracting condition which reflects the idea that agents can freely trade with each other. An alternative (and weaker) recontracting condition characterizesthe core. The results are extended to production economies by extending thedefinition of the recontracting condition to include the possibility of agentsto recontract with firms. However, no optimization requirement is imposed onfirms. In pure exchange economies, an abstract equilibrium is a feasible allocation and a list of choice sets, one for each agent, that satisfy thefollowing conditions: an agent's choice set is a subset of the commodity space that includes his endowment; and each agent's equilibrium bundle isa maximal element in his choice set, with respect to his preferences. Therecontracting condition requires that any agent can buy bundles from any other agent's choice set by offering the other agent a bundle he prefers tohis equilibrium bundle.
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Intraspecific genetic variation for morphological traits is observed in many organisms. In Arabidopsis thaliana, alleles responsible for intraspecific morphological variation are increasingly being identified. However, the fitness consequences remain unclear in most cases. Here, the fitness effects of alleles of the BRX gene are investigated. A brx loss-of-function allele, which was found in a natural accession, results in a highly branched but poorly elongated root system. Comparison between the control accession Sav-0 and an introgression of brx into this background (brxS) indicated that, surprisingly, brx loss of function did not negatively affect fitness in pure stands. However, in mixed, well-watered stands brxS performance and reproductive output decreased significantly, as the proportion of Sav-0 neighbors increased. Additional comparisons between brxS and a brxS line that was complemented by a BRX transgene confirmed a direct effect of the loss-of-function allele on plant performance, as indicated by restored competitive ability of the transgenic genotype. Further, because plant height was very similar across genotypes and because the experimental setup largely excluded shading effects, the impaired competitiveness of the brx loss-of-function genotype likely reflects below-ground competition. In summary, these data reveal conditional fitness effects of a single gene polymorphism in response to intraspecific competition in Arabidopsis.
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Business survey tool from the Improving Transition Outcomes Resource Mapping Workshops
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Content outline used during the Improving Transition Outcomes Resource Mapping Workshops
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Activities used during the Improving Transition Outcomes Resource Mapping Workshops
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Announcement of the Improving Transition Outcomes Resource Mapping Workshops
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Information shared at the Improving Transition Outcomes Resource Mapping Workshops
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Youth survey tool from the Improving Transition Outcomes Resource Mapping Workshops
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Service provider survey tool from the Improving Transition Outcomes Resource Mapping Workshops
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Community organizations survey tool from the Improving Transition Outcomes Resource Mapping Workshops
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Parents survey tool from the Improving Transition Outcomes Resource Mapping Workshops
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Community members survey tool from the Improving Transition Outcomes Resource Mapping Workshops
