23 MAY 2015 by ideonexus
Invasive Species Increase Biodiversity
Life becomes different, and it carries on. Since the majority of invasive species are relatively benign, they add to an island’s overall biodiversity. The ecologist Dov Sax at Brown University in Rhode Island points out that non-native plants have doubled the botanical biodiversity of New Zealand – there are 2,104 native plants in the wild, and 2,065 non-native plants. Ascension Island in the south Atlantic, once a barren rock deplored by Charles Darwin for its ‘naked hideousness’, now has a ...Folksonomies: environmentalism ecology
Folksonomies: environmentalism ecology
21 APR 2014 by ideonexus
Evolution of Sea Turtle Migrations
Each year around Christmas time, green turtles (Chelonia mydas) leave their shallow feeding grounds along the coast of Brazil and embark upon a 2000 km journey to their nesting grounds, the beaches of Ascension Island, in the mid-Atlantic. The journey takes a little more than 2 months in both directions, and is a miracle of navigation. Biologists have long wondered how the turtles manage the feat, and also why they bother to do it at all. Fifteen years ago two researchers, Archie Carr and Pa...Folksonomies: evolution
Folksonomies: evolution
Explained by continental drift (later discredited).
19 MAY 2011 by ideonexus
Dog Breeding and Evolution
Another familiar example is the sculpting of the wolf, Canis lupus, into the two hundred or so breeds of dog, Canis familiaris, that are recognized as separate by the UK Kennel Club, and the larger number of breeds that are genetically isolated from one another by the apartheid-like rules of pedigree breeding. Incidentally, the wild ancestor of all domestic dogs really does seem to be the wolf and only the wolf... [...] The main point I want to draw out of domestication is its astonishing ...Dog breeding demonstrates how quickly animals can evolve, even if it's under artificial selection.