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 2, NUMBER 5, MAY 1989
"UV-B Dose/Dose-Rate Responses of Seasonally Abundant Copepods
of Puget Sound," D.B. Dey (NOAA, 2725 Montlake Blvd. E, Seattle WA 98113),
D.M. Damkaer, G.A. Heron, Oecologia, 76(3), 321-329, 1988.
The UV-B dose/dose-rate thresholds for five species of copepods were
determined and compared to previously studied zooplankton groups. Generally
species appearing later in the spring and summer were less UV-B sensitive. To
improve estimates of impact due to UV-B levels, the natural conditions or
processes that influence the composition and intensity of the UV radiation to
various species must be understood.
"The Influence of Elevated Carbon Dioxide Concentrations on the
Partitioning of Carbon in Source Leaves of Phaseolus vulgaris," J.
Hoddinott (Dept. Plant Sci., Univ. Brit. Columbia, Vancouver, B.C. V6T 2A2,
Can.), P. Jolliffe, Can. J. Bot., 66(12), 2396-2401, Dec. 1988.
In laboratory studies cultivar Gold Crop was grown to the third trifoliate
leaf stage in CO2 concentrations of 380, 800 and 1400 ppm. There was no effect
of the CO2 concentration on plant height, leaf area, or dry weight, but the
specific leaf weight as well as the starch content of the leaves increased with
CO2 level. Labeling experiments with 14CO2 showed that increasing the CO2
concentration around the source leaf just after labeling increased all carbon
flux rates and reduced the residence times in the leaf pools.
"The Effects of Enriched Carbon Dioxide Atmospheres on
Plant-Insect Herbivore Interactions," E.D. Fajer (Dept. Organismic Biol.,
Harvard Univ., Cambridge MA 02138), M.D. Bowers, F.A. Bazzaz, Science,
243(4895), 1198-1200, Mar. 3, 1989.
Larvae of a specialist insect herbivore, Junonia coenia, were reared
on one of its host plants, Plantago lanceolata, and grown in low (350
ppm) or high (700 ppm) CO2 environments. Those larvae raised on high CO2 foliage
grew more slowly and experienced greater mortality, especially in early instars,
than those raised on low CO2 foliage. This was due probably to the reduced
foliar water and nitrogen concentrations of those plants and not to changes in
the concentration of defensive compounds (iridoid glycosides). Results indicate
interactions between plants and herbivorous insects will be modified under the
predicted CO2 concentrations of the 21st century.
Letter on climatic change and forests, ibid., 243(4894),
991, Feb. 24, 1989.
"The Stability Bias and Adjustment to Climatic Variability: The
Case of the Rising Level of the Great Salt Lake," P.M. Morrisette (NCAR,
POB 3000, Boulder CO 80307), Appl. Geog., 8(3), 171-189, July
Discusses Utah's Great Salt Lake as a case of societal adjustment to
climatic variability. Argues that important decisions have been and continue to
be based on a misconception that the lake is stable. Discusses costs of rigid
short-term adjustments to lake-level variability and climatic variability.
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