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- W2034336458 abstract "Two questions central to the population ecology of mutualism include: (1) what mechanisms prevent the inherent positive feedback of mutualism from leading to unbounded population growth; and (2) what mechanisms prevent instability from arising due to overexploitation. Theory and empiricism suggest that preventing such instability requires density-dependent processes. A recent theory proposes that if benefits and costs to a mutualist vary with the density of its partner, then instability can be prevented if the former species can control demographic rates and regulate (or limit) the population density of its partner. The ecological and evolutionary feasibility of this theory of interspecific population regulation has been demonstrated using quantitative models of mutualism between plants and pollinating seed-consuming insects. In these models, resource-limited fruit set and ensuing fruit abortion are mechanisms that can lead to density-dependent recruitment and population regulation of the insects. Yet, there has been little interplay between these theoretical results and empirical research. A recent study empirically examined the density-dependent effects of resource-limited fruit set and fruit abortion in the Yucca/moth mutualism. An analysis of the study led to the conclusion that, even though fruit abortion can account for >95% of moth mortality, it is largely a density-independent source of mortality that cannot regulate moth population density. Here, we re-analyze those empirical data and conduct further theoretical analyses to examine the nature of fruit abortion on moth recruitment. We conclude that resource-limited fruit set and fruit abortion can effectively regulate and limit moth populations, due to its density-dependent feedback on moth recruitment. Nonetheless, in any given interaction, multiple sources of mortality may contribute to the regulation and limitation of populations, and hence the stability of mutualism, including, larval competition and mortality due to locule damage in the Yucca/moth mutualism." @default.
- W2034336458 created "2016-06-24" @default.
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- W2034336458 date "2006-03-16" @default.
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- W2034336458 title "Interspecific population regulation and the stability of mutualism: fruit abortion and density-dependent mortality of pollinating seed-eating insects" @default.
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- W2034336458 doi "https://doi.org/10.1111/j.2006.0030-1299.14430.x" @default.
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