Pesticide Dust and Coral Reefs

Another reason not to like toxic pesticides:  Produced by the chemical giants, Bayer, Dupont, Dow, Monsanto chemical pesticide use is expanding rapidly in Africa.  The erosion caused by monocropping practices and the resulting chemical dust is carrying fungi spores and other notorious toxins and parasites across oceans. So large are these dust clouds–they are regularly tracked by NASA across the Atlantic! This dust has been identified by scientists as well as the USGS as a very significant factor contributing to disease and death of coral reefs in the Caribbean.http://coastal.er.usgs.gov/african_dust/documentary.html

The Effects of African Dust on Coral Reefs and Human Health

Hundreds of millions of tons of mineral dust are transported thousands of miles through the atmosphere from the Sahara and Sahel of Africa to the Caribbean and the Americas every year. Might African dust play a role incoral reef declines in the Caribbean region, and does it have a negative effect on human health?To begin to answer those questions, we first collected air samples in the dust source region (Mali) and off the coast of Africa (Cape Verde Islands) and at downwind sites in Trinidad and Tobago (southeastern Caribbean) and St. Croix (U.S. Virgin Islands) during dust incursions. Next, we identified and quantified the chemical contaminants [pesticides, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and metals] and microorganisms in dust air masses and quantified the inhalable fraction of dust (PM2.5, PM10) and total suspended particulates in sampled air. Preliminary tests of the bioaccessibility of biotoxic and bioactive metals in humans have been completed.

Chemical contaminants [pesticides, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and metals] and microorganisms have been identified in dust air samples from all sites.The next logical step is to test the toxicity of dust on marine organisms, microorganisms including pathogens, and humans (human cells and fluids).

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