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Volume 12 Number 38:  23 September 2009

Editorial
On the Potential Extinction of High-Elevation Species: If the world were to begin warming again, would earth's high-altitude plants and animals find themselves "in danger of being pushed off the planet," as NASA's James Hansen has claimed they would be?

Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from Rawson Lake, Northwestern Ontario, Canada.

Subject Index Summary
Extinction (Real-World Observations - Plants: Stationary): In addition to migrating to more suitable locations, earth's plants have other ways of successfully responding to various pressures that might otherwise lead to their extinction.

Journal Reviews
The Status of Earth's Ocean Heat Content: Is it going up, down or holding relatively steady? ... and what is the significance of the result?

Warming and Cooling in the Bay of Biscay: What does the multi-decadal sea surface temperature cycling of the past century and a half reveal?

Genetic Adaptation to Extreme Environmental Change: Can it work its wonders with respect to global warming?

Alpine Plants Threatened with Warming-Induced Extinction: Can phenotypic plasticity save the day?

Biological Soil Crusts, Seed Germination and CO2: How are the three related?