insider.si.edu: Trees and shrubs for Pacific Northwest gardens / John A. Grant and Carol L. Grant
Trees and shrubs for Pacific Northwest gardens / John A. Grant and Carol L. Grant
Statesman Journal: Extreme heat represents a new threat to trees and plants in the Pacific Northwest
Extreme heat represents a new threat to trees and plants in the Pacific Northwest
Phys.org: Extreme heat represents a new threat to trees and plants in the Pacific Northwest
Reporter-Herald: Wildlife Window: Trees, shrubs and grasses form a community of Life
Science Friday: Trees And Shrubs Are Burying Prairies Of The Great Plains
Paleobotanist Jack A. Wolfe of the United States Geological Survey at Menlo Park, California, has found a number of tropical rain forest fossils along the eastern Gulf of Alaska. These include several kinds of palms, Burmese lacquer trees, mangroves and trees of the type that now produce nutmeg and Macassar oil.
The Klukwan giant belies the belief that trees tend to get smaller the farther north one goes. Both balsam poplar and cottonwood have value for fuel wood, pulp and lumber.
These trees are now responding to fewer hours of sunlight by ceasing to flood their leaves with chlorophyll. The sudden lack of that green, energy-converting chemical allows the leaves to show red, orange and yellow pigments that were within the leaves all summer.
By late winter, intricate buildups of hoarfrost crystals have formed on wooden poles and other objects. Warming rays of the sun cause evaporation of whatever frost may have formed on the south side of vertical poles and trees. Conduction within metal poles causes enough heat transfer to entirely remove the hoarfrost crystals from the pole surface.