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Although clonal organisms dominate many habitats, relatively little is known about their demography in comparison to the more familiar unitary species commonly studied by ecologists. While studies of the population dynamics of clonal species are becoming more common, and methods have recently...
To evaluate the effects of increased air temperature in combination with increased deposition of N and//or S on methane emission, we have raised in situ the temperature and rates of deposition of N and S in a poor fen lawn area of a boreal mixed mire. The experiment was laid out in a factorial...
Pathogens have important effects on host growth, behavior, and population dynamics. Nevertheless, the impact of parasitic infection on host populations may be strongly context dependent. For example, the outcome of host––pathogen interactions may be subject to change based on the level of...
Bias in the adult sex ratio of a population, if not due to a biased primary sex ratio, may be due to differential mortality of males and females, which can occur during any life history stage. Yet, although adult sex-ratio bias is common in dioecious plant species, little is known about the...
Within a plant species, environmental heterogeneity has the potential to influence the distribution of genetic variation among populations through several evolutionary processes, including natural selection, differential gene exchange, and chance associations caused by genetic drift or founder...
Understanding how plant recovery from herbivory interacts with the resource environment is necessary to predict under what resource conditions plants are most affected by herbivory, and ultimately how herbivory impacts plant population dynamics. It has been commonly assumed that plants are...
We tested the hypothesis that adult male arctic ground squirrels ( Spermophilus parryii plesius) exhibit an adaptive stress response during the mating period that may compromise their survival, whereas males at other times (nonreproductive adult males and juvenile males) have a normal functional...
Herbivores and pollinators can simultaneously exert selective pressures on plant traits via direct and indirect effects. Net selection on plant traits, such as defensive chemistry, may be difficult to predict from studying either of these interactions in isolation. In this study, alkaloids were...
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