In 1994, the Forest Inventory and Analysis (FIA) and Forest Health Monitoring programs of the U.S. Forest Service implemented a national ozone (O3) biomonitoring program designed to address specific questions about the area and percent of forest land subject to levels of O3 pollution that may negatively affect the forest ecosystem. This is the first and only nationally consistent effort to monitor O3 stress on the forests of the United States. This report provides background information on O3 and its effects on trees and ecosystems, and describes the rationale behind using sensitive bioindicator plants to detect O3 stress and assess the risk of probable O3 impact. Also included are a description of field methods, analytic techniques, estimation procedures, and how to access, use and interpret the ozone bioindicator attributes and data outputs such as the national ozone risk map.

The future of the world's forests is at the forefront of environmental debate. Rising concerns over the effects of deforestation and climate change are highlighting the need both to conserve and manage existing forests and woodland through sustainable forestry practices. The Forests Handbook, written by an international team of both scientists and practitioners, presents an integrated approach to forests and forestry, applying our present understanding of forest science to management practices, as a basis for achieving sustainability. Volume One presents an overview of the world's forests; their locations and what they are like, the science of how they operate as complex ecosystems and how they interact with their environment. Volume Two applies this science to reality; it focuses on forestry interventions and their impact, the principles governing how to protect forests and on how we can better harness the enormous benefits forests offer. Case studies are drawn from several different countries and are used to illustrate the key points. Development specialists, forest managers and those involved with land and land-use will find this handbook a valuable and comprehensive overview of forest science and forestry practice. Researchers and students of forestry, biology, ecology and geography will find it equally accessible and useful.

National Outdoor Book Award Honorable Mention in the Children's category 2017 Outstanding Science Trade Books for Students K-12 (National Science Teachers Association - Children's Book Council) Finalist for the 2017 AAAS / Subaru SB&F Excellence in Science Book exemplify outstanding and engaging science writing and illustration for young readers Did you know . . .Trees have many talents—they can feed and house animals, create windbreaks, protect watersheds, and help prevent soil erosion. Researchers believe they have found the oldest tree in the world—a spruce in Sweden that has been alive for about 9,500 years. Even dead and decaying trees and stumps are often teeming with life! Young nature enthusiasts will learn these and many other fascinating facts about the wonderful world of trees in Treecology. This fun and interactive resource includes plentiful full-color photos and drawings and clear, kid-friendly discussions of tree structures, families, and foods; the interaction between trees and the wildlife that depend on them; tree and forest–related jobs and preservation, and much more. With encouragement to "Try This," "Look For," and "Listen For," kids participate in 30 hands-on activities that promote observation and analysis, writing and drawing, math and science, and nature literacy skills. They will measure the circumference of a tree trunk, press and preserve leaves, study the textures of tree bark, find evidence of forest creatures, record their findings in a decorated forest logbook, and more. Readers from any region will start to take notice of the trees around them—not just in forests and woods but also around the schools, parks, buildings, and sidewalks of their town, and in their own backyards. Useful resources include a glossary of "tree terms," common and scientific names, a list of tree and nature organizations and groups, and a teacher's guide to initiate classroom discussion and investigation.