Tag Archives: North American

The role of species competition in biodiversity

By Christopher Packham | July 7, 2015   (Phys.org)—Over long spans, biodiversity is a fluid and shifting balance of species and influences. Species diversification occurs in response to a host of complex factors, both biotic and abiotic, and understanding them is a major challenge of evolutionary biology. A group of researchers in Sweden, Switzerland and Brazil have collaborated on a study of North American canids to show that competition from multiple carnivore clades is responsible for …

Butterfly on the brink of extinction is fighting back at last | Customs Today Newspaper

Reported by: Customstoday.com | April 3, 2015 LONDON: Warmer weather in 2014 has led to an increase the numbers of certain butterflies in the U.K. This includes the critically endangered High Brown Fritillary. While some butterflies in the world are facing problems, such as the North American Monarch, other parts of the globe have seen a slight revival in numbers and incidences of certain species. Of 56 key indicator species, some 32 increased across 2014 according to a new survey run by the …

Rare bee discovered by UVa. professor – Waynesboro News Virginian: Local

… linked to the pests and diseases tied to the commercial bumble bee industry. Domesticated bumble bees are used to pollinate greenhouse tomatoes and other crops. In the 1990’s, shortly after the bee’s initial decline, two species of North American bumble bees were shipped to European rearing facilities, where colonies were produced to ship back to the U.S. “ It’s thought that a virulent strain of fungus was accidentally brought back from Europe to North America,” Roulston explained. A …

Climate Change May Put Half of North American Birds at Risk of Extinction

Although the message is a bit gloomy, there are some wonderful watercolour images of birds on the site. Worth clicking on the link just to see them.   Climate change could threaten half of North American birds by the end of the century, according to a new study  from the National Audubon Society . “Half of the birds of North America are at risk of extinction,” says Gary Langham , Audubon’s chief scientist. That estimate is based on the 314 bird species, out of 588 studied, that …

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