Latest Biological dispersal Stories
DNA research provides evidence that some species of Icelandic algae may have originated in northeastern Asia.
When a group of ecologists set out to see how wind moves seeds through isolated patches of habitat, they twisted colored yarn to create mock seeds that would drift with the wind much like native seeds.
Modern cycads have large, heavy seeds with a fleshy outer coat, suggesting they rely on large bodied fruit-eating animals to disperse their seeds. However, little evidence has been found that modern larger-bodied animals like emus or elephants are eating and dispersing the seeds.
Prairie dogs pull up stakes and look for a new place to live when all their close kin have disappeared from their home territory--a striking pattern of dispersal that has not been observed for any other species.
While many researchers are focused on how physical barriers and isolation can lead to new species on land, a pair of LSU biologists are more interested in the speciation of animals in the ocean.
New findings by Virginie Stevens (CNRS), Jean Clobert (CNRS), Michel Baguette (Muséum National d'Histoire Naturelle) and colleagues show that interactions between dispersal and life-histories are complex, but general patterns emerge.
The astonishing diversity of avian movement patterns, reproductive tactics, and survival rates creates rich opportunities for study, but also presents enormous challenges for explaining variation among life-history traits and dispersal.
- The deadly nightshade, Atropa Belladonna, which possesses stupefying or poisonous properties.
- A sleeping-potion; a soporific.
- To mutter deliriously.