The effects of ultraviolet-B radiation on freshwater invertebrates: experiments with a solar simulator

Article Abstract:

A solar simulator was used to compare the sensitivity of five species of freshwater invertebrates to enhanced levels of UV-B radiation. Effects were strongest on the cladoceran Scapholeberis kingii, while Ceriodaphnia reticulata, Daphnia magna and the amphipod Hyalella azteca were moderately affected, and the ostracod Cyprinotus incongruens was highly tolerant to UV-B radiation. Median lethal dose values were identified for each species, with a range from 4.2 to 84.0 muW(cm-2).

Cladocera, Ostracoda, Ostracods, Amphipoda, Amphipods, Freshwater zooplankton

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Sun angle, site selection, parameter choice, and generalizing UV effects in freshwater benthic ecosystems

Article Abstract:

William Donahue and John Clare question the methodology of Walter Hill and Amy McNamara's 1997 study on the effects of ultraviolet (UV) radiation on freshwater benthic communities. The plexiglas shields that were used did not compromise the results of the experiment. They charged that the study only included biota adapted to high levels of UV, but the sites chosen offered a variety of UV environments.

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Effects of ultraviolet radiation on trophic interactions not detected?

Article Abstract:

A 1997 study by W.R. Hill concluded there was no effect of ambient solar ultraviolet (UV) radiation on periphyton and grazers in a Tennessee stream. Hill's methodology and assumptions about the organisms minimized the measured biotic response to UV radiation and nullified his general claims about lack of sensitivity of stream systems to UV.

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