منابع مشابه
Eco-evolutionary dynamics of mutualists and exploiters.
With the growing recognition of exploiters as a prominent and enduring feature of many mutualisms, there is a need to understand the ecological and evolutionary dynamics of mutualisms in the context of exploitation. Here, we model coevolution between mutualist and exploiter birth rates, using an obligate pollinating seed parasite mutualism associated with a nonpollinating exploiter as a referen...
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A common empirical observation in mutualistic interactions is the persistence of variation in partner quality and, in particular, the persistence of exploitative phenotypes. For mutualisms between hosts and symbionts, most mutualism theory assumes that exploiters always impose fitness costs on their host. We exposed legume hosts to mutualistic (nitrogen-fixing) and exploitative (non-nitrogen-fi...
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For any graph, there is a largest integer k such that given any partition of the vertex set with at most k elements in each class of the partition, there is transversal of the partition that is a dominating set in the graph. Some basic results about this parameter, the partition domination number, are obtained. In particular, it is shown that its value is 2 for the two-dimensional infinite grid...
متن کاملApproval Quorums Dominate Participation
We study direct democracy with population uncertainty. Voters’ participation is often among the desiderata by the election designer. We show that with a participation quorum, i.e. a threshold on the fraction of participating voters below which the status quo is kept, the status quo may be kept in situations where the planner would prefer the reform, or the reform is passed when the planner pref...
متن کاملApproval quorums dominate participation quorums
We study direct democracy with population uncertainty. Voters’ participation is often among the desiderata by the election designer. A participation quorum is a threshold on the fraction of participating voters below which the status quo is kept. We show that participation quorums produce incentive for partisans of the status quo to abstain, with the consequence that the status quo may be kept ...
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ژورنال
عنوان ژورنال: Review of Social Economy
سال: 2019
ISSN: 0034-6764,1470-1162
DOI: 10.1080/00346764.2019.1618483