February 28, 2007
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 7, NUMBER 7, JULY 1994
PROFESSIONAL PUBLICATIONS... OF GENERAL INTEREST: UV-B IMPACTS
Response to Solar Ultraviolet-B Radiation: Influence of
Trophic-Level Interactions," M.L. Bothwell (Natl. Hydrol.
Res. Inst., Saskatoon SK S7N 3H5, Can.), D.M.J. Sherbot, C.M.
Pollock, Science, 265(5168), 97-100, July 1, 1994.
Although solar ultraviolet radiation (UVR) can reduce the
photosynthesis and growth of benthic diatom communities in
shallow freshwater, more algae accumulate in UVR-exposed habitats
than in UVR-protected ones. Experiments show that insect larvae
that consume algae are even more sensitive to UVR, and this
differential sensitivity contributes to counter-intuitive
increases in algae in habitats exposed to UVR. Predictions of the
response of entire ecosystems to elevated UV-B cannot be made on
single trophic-level assessments.
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