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Extra info for Ecological Impacts of Climate Change

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Researchers who compared dissolved oxygen content in coastal waters along the Oregon shore conclude that the recent seven years (starting in 2002) have been dramatically different from the previous fifty years (Chan et al. 2008). 5 ml of oxygen per liter of water), and none showed anoxia (no oxygen) in nearshore coastal waters. Starting in 2002 the dead zone has appeared repeatedly each summer. The most severe low-oxygen event on record was in 2006 along the Pacific Northwest coast; that dead zone lasted four months and occupied up to two-thirds of the water column, oxygen levels dropped to zero, and there were widespread die-offs of seafloor life that could not get away quickly enough.

Mild overwintering temperatures have allowed more insect larvae to survive the winter (Logan et al. 2003). At the Examples of Ecological Impacts of Climate Change in the United States 27 same time longer, dryer, and warmer, summers have both accelerated beetle life cycles and stressed the trees upon which these beetles feed. The stressed trees produce less pitch, which makes them more susceptible to beetle damage. Many of the affected forests are made up of trees that are all the same age because of earlier wildfire damage.

The longer, more intense spring-summer drought is stressing mountain forests (Logan et al. 2003). S. Rockies but also in western Canada and Alaska), a legacy of both a changing climate and decades of total fire suppression that has resulted in a dramatic buildup of dead fuels. 5 months (Westerling et al. 2006). In 2007 California had wildfires burning in November, and Billings, Montana, had a wildfire burning on January 8, 2008. 5 mi2) as there were 30 years ago, and these frequent large fires are burning six times as much area.

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