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Pollution Harms Top Marine Predators

Date:
August 28, 2007
Source:
Allen Press
Summary:
A new study provides some of the first evidence that albatrosses in the North Pacific may be affected by environmental contamination. Alterations in the immune function of the black-footed albatross were associated with elevated blood levels of nonpoint source contaminants. Non-point source pollution comes from a wide variety of sources such as farms, cars, roads and highways, and lawns. This kind of pollution is ubiquitous and can pose a significant threat to wildlife.

A new study provides some of the first evidence that albatrosses in the North Pacific may be affected by environmental contamination. Alterations in the immune function of the black-footed albatross were associated with elevated blood levels of nonpoint source contaminants.

Nonpoint source pollution comes from a wide variety of sources such as farms, cars, roads and highways, and lawns. This kind of pollution is ubiquitous and can pose a significant threat to wildlife.

At particular risk are higher trophic level species such as albatrosses, which are at the top of the food chain. These long-lived seabirds travel and forage over vast ranges and therefore accumulate chemicals distributed over large oceanographic regions. The black-footed species, however, breeds mainly on the Hawaiian archipelago.

The study researchers said that although measuring physiological changes in wild populations was challenging, measuring immune function was an important step in linking changes in biomarkers to contaminant exposure. The elevated blood levels found in the albatrosses were due mainly to mercury and various organochlorines.

Because the North Pacific is an area of high biological productivity, results from the study are important for other species as well. Of particular concern is the health of other predators in the high-latitude regions of the Arctic, such as seabirds, polar bears, and other marine mammals, that are exposed to contaminants in the marine environment.

This study is published in the latest issue of Environmental Toxicology and Chemistry.


Story Source:

The above story is based on materials provided by Allen Press. Note: Materials may be edited for content and length.


Cite This Page:

Allen Press. "Pollution Harms Top Marine Predators." ScienceDaily. ScienceDaily, 28 August 2007. <www.sciencedaily.com/releases/2007/08/070823195154.htm>.
Allen Press. (2007, August 28). Pollution Harms Top Marine Predators. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2007/08/070823195154.htm
Allen Press. "Pollution Harms Top Marine Predators." ScienceDaily. www.sciencedaily.com/releases/2007/08/070823195154.htm (accessed July 23, 2014).

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