Phenotypic plasticity and its evolution may help evolutionary rescue in a novel and stressful environment, especially if environmental novelty reveals cryptic genetic variation that enables the evolution of increased plasticity (panels a and b in the figure below). But the environmental stochasticity ubiquitous in natural systems may alter these predictions ...

The potential for extirpation of extremely small populations (ESPs) is high due to their vulnerability to demographic and environmental stochasticity and negative impacts of human activity. We argue that conservation actions that could aid ESPs are sometimes delayed because of a fear of failure. In human psychology, the fear of ...

The biologists have done their jobs. We know the life cycles and habitat requirements of endangered western fishes. . . [A] successful management program could be devised and implemented for the Grand Canyon region. Current politics stand in the way, just as surely as politics of the 1960s aided and abetted our ...

Background/Question/Methods

In nature, selection often fluctuates, but observed changes in traits may owe not only to selection but plasticity. Further, changes in traits due to selection and to plasticity do not have equal demographic effects: the cost of selection is paid through declines in population number or growth ...

in peer reviewed / M.Sc. / Allee effect / spillback / spillover / salmon / aquaculture on Thu 05 September 2013

The exchange of native pathogens between wild and domesticated animals can lead to novel disease threats to wildlife. However, the dynamics of wild host-parasite systems exposed to a reservoir of domesticated hosts are not well understood. A simple mathematical model reveals that the spill-back of native parasites from domestic to ...