Charles H. Perry

Learn More
Whether the fraction of total forest biomass distributed in roots, stems, or leaves varies systematically across geographic gradients remains unknown despite its importance for understanding forest ecology and modeling global carbon cycles. It has been hypothesized that plants should maintain proportionally more biomass in the organ that acquires the most(More)
For two decades, the US Department of Agriculture, Forest Service, has been charged with implementing a nationwide field-based forest health monitoring effort. Given its extensive nature, the monitoring program has been gradually implemented across forest health indicators and inventoried states. Currently, the Forest Service's Forest Inventory and Analysis(More)
Many international protocols (e.g., REDD+) are developing inventories of ecosystem carbon stocks and fluxes at country and regional scales, which can include peatlands. As the only nationally implemented field inventory and remeasurement of forest soils in the US, the USDA Forest Service Forest Inventory and Analysis Program (FIA) samples the top 20 cm of(More)
Ensuring acceptance of dedicated biomass feedstocks by landowners, agricultural communities, environmental and public interest groups, requires that the environmental benefits, concerns, and risks associated with their production be quantified. Establishment and management measures to benefit soil and water quality are being identified by ongoing research.(More)
Agroforestry plantings and other trees intentionally established in rural and urban areas are emerging as innovative management options for addressing resource issues and achieving landscape-level goals. An understanding of the ecosystem services contributed by these and future plantings would provide critical information to policy and program developers,(More)
Trees used in agroforestry practices, such as windbreaks, provide a variety of ecosystem benefits and are recognized globally as an important land use. However, efforts to inventory and monitor agroforestry land use have been sporadic, short-lived, or focused on small spatial extents. There are a variety of satellite-derived datasets that provide(More)
PROJECT OBJECTIVES: (1) Determine relationships between condition of yellow birch trees, associated low-soil-calcium tolerant tree species, and associated soil chemistry (pH, Al/Ca, toxins, etc.) in the Southern Appalachians (SoApps); (2) assess the potential of yellow birch to indicate forested areas susceptible to climate change and other regional(More)
OBJECTIVE To review assault victim attendance at the accident and emergency department of Glasgow Royal Infirmary before and after a police initiative to curb knife carrying and tackle violent assaults ("Operation Blade"). METHODS Assault victim attendance was reviewed for the month before the implementation of Operation Blade and for one month a year(More)