glacial cycles

Listing 1 - 8 from 8 for glacial cycles

Canary Islands Flora
... catastrophic events: the desertisation process and a series of glacial cycles. Geology The former event took place in the late ... the climate in the surrounding areas. The series of glacial cycles took place between the Pliocene and Pleistocene periods about 1 ... Canary Islands form the biogeography region called Macaronesia. The eruptive cycles and the consequent dismantle of the volcanic cones due ...
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FLORA OF NORTH AMERICA - Volume 1, Chapter 1
... distribution of biotas through time. Climate has changed under cosmic influences, such as the Milankovitch cycles (discussed by P.A. Delcourt and H.R.Delcourt, chap. 4; see also F.I ... the surface or producing surficial deposits of considerable extent. These deposits can result directly from glacial erosion, or less directly from proglacial lacustrine deposition or from transport of silt and sand ...
hua.huh.harvard.edu

APSnet Education Center - Laboratory Exercises in Plant Pathology - Cytology of Fungal Infection
... INTRODUCTION: Penetration and establishment of infection in host tissue are key events in the disease cycles of fungal pathogens. Fungal spores on plant surfaces usually can survive in a dormant state ... ; clearing the tissue by boiling for 1-2 min in a 1:1 mixture of glacial acetic acid and 95% ethanol followed by rinsing in sterile distilled water; and placing leaves ...
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Jed O. Kaplan
... . Kaplan, Implications of coral reef buildup for the controls on atmospheric CO2 since the Last Glacial Maximum, Paleoceanography, 18 (4), 2003. Bigelow, N.H., et al., Climate change and Arctic ecosystems ... topographically complex region to direct and indirect effects of anthropogenic carbon dioxide emissions, Glob. Biogeochem. Cycles, 17 (2), 36.1-36.14, 2003. Scholze, M., J.O. Kaplan, W. Knorr, and ...
www.botany.unibe.ch

Climate during the Carboniferous Period
... the Earth alternately cooled then warmed, great sheets of glacial ice thousands of feet thick accumulated, then melted, then reaccumulated in synchronous cycles. Vast glaciers up to 8,000 feet thick ... pole, and during the Late Carboniferous Period was largely buried under large sheets of glacial ice. Europe, Greenland, Siberia, North America, Kazakhstan, and N.China together comprised Laurasia. It ...
www.clearlight.com

Pinus contorta Dougl
... drier soils derived from limestone. In Canada, however, extensive stands occur on calcareous glacial tills (56). Glacial drift provides a balance of moisture and porosity on which the species seems ... -11, 1973. p. 359-376. Washington State University, Pullman. Brown, James K. 1975. Fire cycles and community dynamics in lodgepole pine forests. In Proceedings, Symposium on Management of Lodgepole ...
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Pinus monticola Dougl
... quartzite, argillite, sandstone, and shale. Most often, the more rocky soils have developed from basalt, glacial deposits, alluvial deposits, or lacustrine deposits (28). In the Inland Empire, the upper soil ... in the short shoot. Nursery and field tests of rust resistant seedlings after two cycles of selections indicate rust resistance of 66 and 88 percent, respectively. Hybrids Western white ...
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Concerning the Origin and Distribution of Rhododendrons
... surface temperature is below freezing. Earth is said to be in a "glacial period". Earth has been in a glacial period for the past 2 to 3 million years, during which there ... that it was precisely this combination of very high mountains situated in tropical latitudes, and cycles of glaciation and deglaciation, that provided the dynamic conditions for the extraordinary speciation of lepidote ...
www.rhododendron.org