Invasive Species and Pine Beetles.

Gore says “Another study in National Geographic magazine shows sharp decline in frost days in southern Switzerland and a simultaneous sharp increase in invasive alien species that have rushed in to fill the newly created ecological niches.”

This little hobgoblin is disingenuous again because review of the study on which the National Geographic article is based, concluded that all of the “invasive alien species” were deliberately introduced by people.

See Sherwood, Craig, and Keith Idso, The Specter of Species Extinction: Will Global Warming Decimate the Biosphere? George C. Marshall Institute, 2003, p. 24.

Gore says that as frost days in the American West have declined, the spread of pine beetles and other pests has increased.

The hobgoblin is disingenuous because forests if not managed properly become vulnerable to pests, disease and fires. Gore does not consider the role of forest management. “Trees that are not growing vigorously due to old age, crowding, poor growing conditions, drought, fire or mechanical damage, root disease and other causes are most likely to be attacked.”

See D.A. Leatherman, Mountain Pine Beetle, Colorado State University Cooperative Extension.

The number of Pine trees in Western United States has increased by a factor 30 or 40 over the last century. This is probably the major contributor to pine beetle infestation.

See Kloor, K. 2000. Restoration Ecology: Returning America’s Forests to Their Natural Roots, Science 287: 573-575, http://www.sciencemag.org/cgi/content/summary/287/5453/573