Search results
Results From The WOW.Com Content Network
For example, exploitative interactions between a predator and prey can result in the extinction of the victim (the prey, in this case), as the predator, by definition, kills the prey, and thus reduces its population. [2] Another effect of these interactions is in the coevolutionary "hot" and "cold spots" put forth by geographic mosaic theory ...
Enemy release may be weaker, too, when an exotic species is more closely related to native species in their introduced ranges, making them more likely to share herbivores or pathogens. [22] In a meta-analysis of 19 research studies involving 72 pairs of native and invasive plants, invasive exotic species did not incur less damage than their ...
The Red Queen hypothesis has been invoked by some authors to explain evolution of aging. [30] [31] The main idea is that aging is favored by natural selection since it allows faster adaptation to changing conditions, especially in order to keep pace with the evolution of pathogens, predators and prey. [31]
Occasionally predators will prefer feeding on the sick or infected prey even though they carry a parasite because of the opportunity weak prey present. [5] Without the presence of a predator species the prey species would likely exceed manageable numbers therefore leading to the rapid spread of pathogens throughout the prey population. [6]
Another evolutionary mode arises where evolution is reciprocal, but is among a group of species rather than exactly two. This is variously called guild or diffuse coevolution. For instance, a trait in several species of flowering plant , such as offering its nectar at the end of a long tube, can coevolve with a trait in one or several species ...
Joseph Connell published his hypothesis in 1970 in Dynamics of Populations. [2] Unlike Janzen, Connell proposed experiments that focused on the key prediction that exclusion of host-specific predators would cause a decrease in diversity as tree species with greater establishment or competitive ability formed low-diversity seedling and sapling communities where dominance was concentrated in a ...
Anvil stone, where a thrush has broken open shells of polymorphic Cepaea snails; its selection of morphs may be frequency-dependent. [4]The first explicit statement of frequency-dependent selection appears to have been by Edward Bagnall Poulton in 1884, on the way that predators could maintain color polymorphisms in their prey.
Hosts and parasites exert reciprocal selective pressures on each other, which may lead to rapid reciprocal adaptation.For organisms with short generation times, host–parasite coevolution can be observed in comparatively small time periods, making it possible to study evolutionary change in real-time under both field and laboratory conditions.