In the northern forest they are northern pin oak, red pine, quaking aspen, paper birch, and balsam fir. 20. of 40. Pine, Jeffrey . Pinus jeffreyi foliage and cones, Big Bear Lake, California.

Northern pine forests may exude nitrogen oxides—a contributor to smog and acid rain—in quantities that rival those produced by industry and traffic worldwide. Skip to content.

At 9,672 acres, Hartwick Pines State Park is one of Michigan's largest, with miles of trails through a variety of terrain. ... Hartwick Pines: Towering forest, lumber lore Up North.

Pine beetle infestations in the southeastern United States cost an estimated $100 million a year in timber losses from 1990 through 2004 alone, according to the U.S. Forest Service.

What do the landscape painters of Canada and northern Europe have in common? Their muse is the taiga, or boreal forest: a massive ring of mostly coniferous trees that stretches across the Northern ...

The southern pine beetle is projected to be able to expand into vast areas of the northeastern US and southeastern Canada by 2050 posing risks to forest structure, biodiversity and associated ...

Forests in northern areas are stunted, ... Tree species differ for example so that birch matures at a considerably younger age than pine, and birch seeds spread more effectively than pine seeds.