David C. Chojnacky

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Down deadwood (DDW) is a carbon component important in the function and structure of forest ecosystems, but estimating DDW is problematic because these data are not widely available in forest inventory databases. However, DDW data were collected on USDA Forest Service Forest Inventory and Analysis (FIA) plots during Maine's 1995 inventory. This study(More)
BACKGROUND AND PURPOSE Natural infection of research mice with enterohepatic Helicobacter spp. is common and may confound experimental studies from intercurrent disease. We evaluated a protocol of dirty bedding exposure for transmission of Helicobacter infection from colony mice to female Tac:(SW)fBR sentinel mice over 6 months. METHODS Cecal scrapings(More)
Mass and carbon load estimates, such as those from forest soil organic matter (duff and litter), inform forestry decisions. The US Forest Inventory and Analysis (FIA) Program systematically collects data nationwide: a down woody material protocol specifies discrete duff and litter depth measurements, and a soils protocol specifies mass and carbon of duff(More)
PROJECT OBJECTIVES: (1) Develop bulk density (specific gravity) auxiliary parameters for the eastern U.S. from Forest Inventory and Analysis (FIA) phase 3 (P3) soils data. (2) Use these parameters to estimate duff and litter fuel loading from P3 down woody material data to combine with phase 2 (P2) plot data to produce county-level duff and litter estimates(More)
Lebanon’s Ministry of Environment initiated a project in 2009 to determine low-cost reforestation techniques for stone pine (Pinus pinea) and Lebanon cedar (Cedrus libani) for large-scale land rehabilitation activities in the arid Middle East. Irrigation (several techniques vs. no water), planting (8to 18-month-old seedlings), seeding, and soil preparation(More)
—Methodology is lacking to easily map Forest Inventory and Analysis (FIA) inventory statistics for all attribute variables without having to develop separate models and methods for each variable. We developed a mapping method that can directly transfer tabular data to a map on which pixels can be added any way desired to estimate carbon (or any other(More)
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