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LEADER 04030cam 2200469Ia 4500

001 ocn232959350;

003 OCoLC;

005 20141212010045.0;

006 m d f ;

007 cr cn|||||||||;

008 080630s2007 pauab sb f000 0 eng d;

035 a| (Sirsi) o232959350;

035 a| (OCoLC)232959350;

043 a| n-us-pa;

049 a| ERE#;

074 a| 0083-B-05 (online);

086 0 a| A 13.80:NRS-20;

100 1 a| McWilliams, William H.=| ^A429181;

245 10 a| Pennsylvania's forest 2004 /c| William H. McWilliams [and others].;

260 a| Newtown Square, PA :b| USDA Forest Service,c| [2007];

300 a| 86 pages :b| digital, PDF file.;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| Resource bulletin NRS ;v| 20;

500 a| "October 2007"--Cover.;

500 a| Title from title screen (viewed Aug. 29, 2008).;

504 a| Includes bibliographical references (p. 76-79).;

520 3 a| In 2000, the Pennsylvania Department of Conservation's Natural Resources, Bureau of Forestry and the Northern Research Station's Forest Inventory and Analysis unit implemented a new annual system for inventorying and monitoring Pennsylvania's forests. This report includes data from 2000 to 2004. Pennsylvania's forest-land base is stable, covering 16.6 million acres or 58 percent of land area. More than 660,000 acres of forest land were lost from 1989 to 2004, mostly to residential or industrial development. However, there was a 617,500-acre gain in forest land, mostly from agricultural land. Fifty-four percent of forest land is owned by families and individuals. Forest types with red maple as a dominant species have increased, while stands with sugar maple as a dominant have decreased. The distribution of forest land by stand-size class has been shifting toward large stands that now account for 6 of 10 acres. The area of forest has increased in the poor and moderate stocking classes and decreased in the full and overstocked classes. Hemlock, sugar maple, and oaks are poised to be less dominant in the future. Increases in red maple are slowing while black birch continues to increase. Sawtimber volume totals 88.9 billion board feet, an average of about 5,000 board feet per acre. Increases in sawtimber inventory have slowed over time. Currently, only half of the forest land that should have advance regeneration is adequately stocked with high-canopy species, and only one-third has adequate regeneration for commercially desirable timber species. Grass/forb and rhizomous ferns dominate understory communities, accounting for nearly one-third of the total nontree vegetative cover sampled. Several exotic diseases and insects threaten the health of Pennsylvania's forests. Exoticinvasive plants threaten native plant diversity and forest health; however, monitoring efforts are only beginning to quantify their distribution and abundance. Stressors such as drought, acidic deposition, and ground-level ozone pollution are adversely affecting the State's forests. Continued monitoring is required to gain a more complete understanding of these impacts on this valuable resource.;

538 a| Mode of access: Internet at the U.S. Forest Service NRS web site. Address as of 8/29/08: http://www.nrs.fs.fed.us/pubs/rb/rb%5Fnrs20.pdf ; current access available via PURL.;

650 0 a| Forests and forestryz| Pennsylvania.=| ^A1097613;

650 0 a| Forest ecologyz| Pennsylvania.=| ^A18110;

710 1 a| United States.b| Forest Service.b| Northern Research Station.=| ^A713536;

776 0 a| McWilliams, William H.t| Pennsylvania's forest 2004h| 86 p.w| (OCoLC)225184821;

830 0 a| Resource bulletin NRS ;v| 20.=| ^A713485;

856 40 u| https://purl.fdlp.gov/GPO/LPS101085;

994 a| C0b| ERE;

998 a| 1432540;

998 a| u1432540;

596 a| 1;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| MQ2709748l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 10/28/2008x| EDOCUMENTz| JERESOURCEo| .STAFF. 0;

Pennsylvania's forest 2004 / William H. McWilliams [and others].

Author/creator	McWilliams, William H.
Other author	United States. Forest Service. Northern Research Station.
Format	Electronic
Publication Info	Newtown Square, PA : USDA Forest Service, [2007]
Description	86 pages : digital, PDF file.
Supplemental Content	https://purl.fdlp.gov/GPO/LPS101085
Subjects	Forests and forestry--Pennsylvania. Forest ecology--Pennsylvania.

Series	Resource bulletin NRS ; 20 Resource bulletin NRS ; 20. ^A713485
Summary	In 2000, the Pennsylvania Department of Conservation's Natural Resources, Bureau of Forestry and the Northern Research Station's Forest Inventory and Analysis unit implemented a new annual system for inventorying and monitoring Pennsylvania's forests. This report includes data from 2000 to 2004. Pennsylvania's forest-land base is stable, covering 16.6 million acres or 58 percent of land area. More than 660,000 acres of forest land were lost from 1989 to 2004, mostly to residential or industrial development. However, there was a 617,500-acre gain in forest land, mostly from agricultural land. Fifty-four percent of forest land is owned by families and individuals. Forest types with red maple as a dominant species have increased, while stands with sugar maple as a dominant have decreased. The distribution of forest land by stand-size class has been shifting toward large stands that now account for 6 of 10 acres. The area of forest has increased in the poor and moderate stocking classes and decreased in the full and overstocked classes. Hemlock, sugar maple, and oaks are poised to be less dominant in the future. Increases in red maple are slowing while black birch continues to increase. Sawtimber volume totals 88.9 billion board feet, an average of about 5,000 board feet per acre. Increases in sawtimber inventory have slowed over time. Currently, only half of the forest land that should have advance regeneration is adequately stocked with high-canopy species, and only one-third has adequate regeneration for commercially desirable timber species. Grass/forb and rhizomous ferns dominate understory communities, accounting for nearly one-third of the total nontree vegetative cover sampled. Several exotic diseases and insects threaten the health of Pennsylvania's forests. Exoticinvasive plants threaten native plant diversity and forest health; however, monitoring efforts are only beginning to quantify their distribution and abundance. Stressors such as drought, acidic deposition, and ground-level ozone pollution are adversely affecting the State's forests. Continued monitoring is required to gain a more complete understanding of these impacts on this valuable resource.
General note	"October 2007"--Cover.
General note	Title from title screen (viewed Aug. 29, 2008).
Bibliography note	Includes bibliographical references (p. 76-79).
Technical details	Mode of access: Internet at the U.S. Forest Service NRS web site. Address as of 8/29/08: http://www.nrs.fs.fed.us/pubs/rb/rb%5Fnrs20.pdf ; current access available via PURL.
Issued in other form	McWilliams, William H. Pennsylvania's forest 2004 86 p.
GPO item number	0083-B-05 (online)
Govt. docs number	A 13.80:NRS-20

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