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Item #d92may15

"Use of a Reservoir Water Quality Model to Simulate Global Climate Change Effects on Fish Habitat," L.H. Chang (Environ. Sci. Div., Oak Ridge Nat. Lab., POB 2008, Oak Ridge TN 37831), S.F. Railsback, R.T. Brown, Clim. Change, 20(4), 277-296, Apr. 1992.

All six doubled-CO2 climate scenarios predicted by three GCMs indicate overall declines in the available summer striped bass habitat in the southeastern U.S., mainly because lake temperatures are expected to exceed tolerance levels. Discusses the problems of predicting small-scale impacts from large-scale grid models.

Item #d92may16

"Bacterial Growth in the Cold--Evidence for an Enhanced Substrate Requirement," W.J. Wiebe (Dept. Microbiol., Univ. Georgia, Athens GA 30602), W.M. Sheldon, L.R. Pomeroy, Appl. Environ. Meteor., 58(1), 359-364, 1992.

Growth responses and biovolume changes for four facultatively psychrophilic bacterial isolates from Conception Bay, Newfoundland, and the Arctic Ocean were examined at temperatures from -1.5° C to 35° C and various substrate concentrations. Results have implications for food web structure and carbon flow in cold waters, and for the effects of climate change.

Item #d92may17

"Potential Effects of Global Warming on Whitefish in Lake Constance, Germany," E.A. Trippel (Biol. Sta., St. Andrews, N.B. E0G 2X0, Can.), R. Eckmann, J. Hartmann, Ambio, 20(6), 226-231, Sep. 1991.

In the early stages of each climatic warming scenario examined, whitefish abundance is predicted to increase. Results are sensitive to the timing of temperature increases during April and May. Whitefish in shallow lakes may not respond favorably to a warmer climate because of reduced oxygen enrichment of deep waters.

Item #d92may18

"A 20-Year Record of Alpine Grasshopper Abundance, with Interpretations for Climate Change," E.G. White (74 Toorak Ave., Christchurch 4, New Zealand), J.R. Sedcole, N.Z. J. Ecol., 15(2), 139-152, 1991.

Potential effects of altered temperature, rainfall and rainday number are considered in light of results from this New Zealand study. Concludes that flora and fauna could eventually become depleted in alpine regions due to displacement of grasshoppers to vegetation-scree margins.

Item #d92may19

"Chlorophyll a Distribution in Southern Benguela, Possible Effects of Global Warming on Phytoplankton and Its Implications for Pelagic Fish," P.C. Brown (Sea Fish. Res. Inst., Pvt. Bag X2, Rogge Bay, 8012 South Africa), K.L. Cochrane, S. African J. Sci. (Suid-Afrikaanse Tydskrif vir Wetenskap), 87(6), 233-242, June 1991.

Summarizes available chlorophyll data and statistical relationships between chlorophyll and primary production off the south and west coast of South Africa. Speculates on the implications of regional global warming, and proposes monitoring of chlorophyll distributions.

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