The Northeast's Changing Forest reviews the history and conditions of the forest in the nine northeastern states. This diverse region stretches from the shores of Lake Erie to Passamaquoddy Bay and from Cape May, New Jersey to northern Maine. The forests range from the dune forest of the New Jersey beaches to subalpine forests in the White Mountains and the Adirondacks. Heavily cleared for agriculture in the nineteenth century, the region's forests have increased in area since 1909 by an amount equal to the entire forest area of Maine, which is 17 million acres.

The region's forests can be thought of as five "forests," each playing a distinct economic role. In the Industrial Forest, the growing and harvesting of industrial wood is the primary use, accompanied by substantial use for hunting, fishing, snowmobiling, and wilderness canoeing. In the Suburban Forest, the general emphasis on "green backdrop" roles belies the importance of casual recreation, firewood cutting, and industrial wood uses. In the Rural Forest of the region's farming and thinly settled rural areas, traditional forest uses continue. In the Recreational Forest, heavily developed areas for skiing, lakeside camps and resorts, and coastal developments set the tone. Finally, in the Wild Forest, preservation of nature is dominant.

After generations when few aside from the landowner and technical communities paid the forests much attention, they have now become focal points for policy conflicts. Proposals for large additions to the Adirondack Park's Forever Wild lands, for creating a Maine Woods National Park, and for eliminating all timber harvesting on the region's National Forests are prominent examples. The legislatures of every state in the region deal annually with issues of forest taxation, forest practices regulation, public ownership, and land uses affecting forests. The Northeast's Changing Forest gives readers an historic, geographic, and ecological background for understanding the condition of the forests of the Northeast and the outlook for their future.

The Wildlands and Woodlands vision, as described in two previous Harvard Forest publications, calls for collaboration among conservationists and willing landowners to permanently protect at least 70 percent of the New England landscape as forests by 2060. Another 7 percent of land that is currently in agriculture would remain intact for wildlife and people. This series advocates a balanced approach to conservation and preservation; most land would be actively and sustainably managed for wood, food, and other values, while continuing to provide clean water and air, wildlife habitat, recreation, and support for human lives in a changing environment. About a tenth of the forest, along with associated wetlands, streams, ponds, and other habitats, would comprise large wildland reserves.

This 2017 report offers new data on progress toward these goals and outlines complementary uses of the forest and agricultural landscape with thoughtful and efficient development of rural villages and towns, suburbs, and cities—to support people and nature across New England. It ends with recommendations to protect and care for the land that can forge a bright future for New England, provide a regional example for the nation, and help mitigate global environmental change.