Temperature-dependent ultraviolet radiation responses in zooplankton: Implications of climate change

Williamson, Craig E., Gabriella Grad, Hendrika J. De Lange, Shawna Gilroy, Danielle M. Karapelou

Limnol. Oceanogr., 47(6), 2002, 1844-1848 | DOI: 10.4319/lo.2002.47.6.1844

ABSTRACT: Climate warming and stratospheric ozone depletion increase temperature and ultraviolet (UV) in mid- to highlatitude ecosystems; however, little is known about the interactive effects of temperature and UV on organisms. We exposed Daphnia catawba, Leptodiaptomus minutus, and Asplanchna girodi to UV-B at four different temperatures: 10, 15, 20, and 25°C. Elevated temperatures increased UV tolerance in D. catawba and L. minutus, species that depend heavily on photoenzymatic repair (PER), but decreased UV tolerance in A. girodi, a species that has less PER. Also, body size in Daphnia decreased with increasing UV dose. These results demonstrate that climate change can alter responses to UV through temperature-mediated effects in aquatic ecosystems, and these effects can be species-specific and dependent on PER ability.

Article Links

Please Note