Michael Hoppus
United States Forest Service
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Featured researches published by Michael Hoppus.
Archive | 2005
William H. McWilliams; Brett J. Butler; Laurence E. Caldwell; Douglas M. Griffith; Michael Hoppus; Kenneth M. Laustsen; Andrew J. Lister; Tonya W. Lister; Jacob W. Metzler; Randall S. Morin; Steven A. Sader; Lucretia B. Stewart; James R. Steinman; A. Westfall James; David A. Williams; Andrew Whitman; Christopher W. Woodall
In 1999, the Maine Forest Service and USDA Forest Services Forest Inventory and Analysis program implemented a new system for inventorying and monitoring Maines forests. The effects of the spruce budworm epidemic continue to affect the composition, structure, and distribution of Maines forested ecosystems. The area of forest land in Maine has remained stable since the 1970s. Although relatively small acreages of forest are converted to other land uses, these conversions often remove highly valued forests such as white pine. The total inventory volume of live trees increased slightly, indicating the beginning of a response of Maines forest to the tremendous devastation from spruce budworm.
Resource Bulletin - Northern Research Station, USDA Forest Service | 2007
William H. McWilliams; Seth P. Cassell; Carol L. Alerich; Brett J. Butler; Michael Hoppus; Stephen B. Horsley; Andrew J. Lister; Tonya W. Lister; Randall S. Morin; Charles H. Perry; James A. Westfall; Eric H. Wharton; Christopher W. Woodall
Pennsylvanias forest-land base is stable, covering 16.6 million acres or 58 percent of the land area. Sawtimber volume totals 88.9 billion board feet, an average of about 5,000 board feet per acre. Currently, only half of the forest land that should have advance tree seedling and sapling regeneration is adequately stocked with high-canopy species, and only one-third has adequate regeneration for commercially desirable timber species. Several exotic diseases and insects threaten the health of Pennsylvanias forests. Stressors such as drought, acidic deposition, and ground-level ozone pollution are adversely affecting the States forests.
Remote Sensing of Environment | 2007
Wayne Walker; Josef Kellndorfer; Elizabeth Lapoint; Michael Hoppus; James A. Westfall
Archive | 2002
Chengquan Huang; Limin Yang; Collin G. Homer; Michael Coan; Russell Rykhus; Zheng Zhang; Bruce K. Wylie; Kent Hegge; Zhiliang Zhu; Andrew J. Lister; Michael Hoppus; Ronald Tymcio; Larry T. DeBlander; William H. Cooke; Ronald E. McRoberts; Daniel G. Wendt; Dale Weyermann
Archive | 2005
Andrew J. Lister; Charles T. Scott; Susan King; Michael Hoppus; Brett J. Butler; Douglas Griffith
Archive | 2007
Michael Hoppus; Andrew J. Lister
In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; Moser, John W., eds. Proceedings of the Thrid Annual Forest Inventory and Analysis Symposium; Gen. Tech. Rep. NC-230. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station: 44-49 | 2002
Michael Hoppus; Andrew J. Lister
Archive | 2002
Rachel Riemann; Andrew J. Lister; Michael Hoppus; Tonya W. Lister
Archive | 2009
Charles H. Perry; Mark D. Nelson; J. Christopher Toney; Tracey S. Frescino; Michael Hoppus
Archive | 2005
Michael Hoppus; Andrew J. Lister