Abstract The quantity and condition of downed dead wood (DDW) is emerging as a major factor governing forest ecosystem processes such carbon cycling, fire behavior, tree regeneration. Despite this, systematic inventories DDW are sparse if not absent across biomes. Forest Inventory Analysis program the United States (US) Service has conducted an annual inventory on all coterminous US land since 2002 (~1 plot per 38,850 ha), with sample intensification occurring 2012 19,425 ha). data organized...

Abstract An extensive statewide data set for seven conifer and eight hardwood species commonly occurring in Maine was used the development of maximum largest crown width equations. To establish characteristics open-grown trees, quantile regression to estimate biological a at given diameter. predict widths trees forested settings, constrained nonlinear equation used, using predicted width, tree diameter, ratio. The models performed well across wide range stand conditions present improved...

Large-area assessment of aboveground tree biomass (AGB) to inform regional or national forest monitoring programs can be efficiently carried out by combining remotely sensed data and field sample measurements through a generic statistical model, in contrast site-specific models. We integrated inventory plot with spatial predictors from Landsat time-series imagery LiDAR strip samples at four sites across the eastern USA—Minnesota (MN), Maine (ME), Pennsylvania-New Jersey (PANJ) South Carolina...

The publicly accessible archive of Landsat imagery and increasing regional-scale LiDAR acquisitions offer an opportunity to periodically estimate aboveground forest biomass (AGB) from 1990 the present align with reporting needs National Greenhouse Gas Inventories (NGHGIs). This study integrated time-series data, a state-wide dataset, recent cycle national inventory (NFI) records in Minnesota, USA, obtain spatially explicit AGB across large region space time back baseline used by US NGHGI....

Quantifying forest carbon (C) stocks and stock change within a matrix of land use (LU) LU is central component large-scale C monitoring reporting practices prescribed by the Intergovernmental Panel on Climate Change (IPCC). Using region-wide, repeated inventory, pool were examined categories. In eastern US forests, substantial sink strength (~37% strength) only secondary to that accumulation in forests remaining where their comingling with other LUs does not substantially reduce strength....

Forests provide the largest terrestrial sink of carbon (C). However, these C stocks are threatened by forest land conversion. Land use change has global impacts and is a critical component when studying fluxes, but it not always fully considered in accounting despite being major contributor to emissions. An urgent need exists among decision-makers identify likelihood conversion other uses factors affecting loss. To help address this issue, we conducted our research California, Colorado,...

Journal Article In-vitro and in-vivo susceptibility of Borrelia burgdorferi to azithromycin Get access Russell C. Johnson, Johnson * University Minnesota, Minneapolis, Central Research DivisionPfizer Inc., Groton, USA Correspondence to: Dr R. Department Microbiology, Box 196 UMHC, 420 Delaware Street S.E., Minnesota 55455, USA. Search for other works by this author on: Oxford Academic PubMed Google Scholar Carrie Kodner, Kodner Marie Russell, Dennis Girard Antimicrobial Chemotherapy, Volume...

Abstract Aim For trees, wood density is linked to competing energetic demands and therefore reflects responses the environment. Climatic trends in are recognized, yet their contribution regional biogeographical patterns or impact on forest biomass stocks not understood. This study has following two objectives: (O1) characterize density–climate for coarse (i.e., angiosperm versus gymnosperm) fine within‐species) taxonomic units test a predictive model that incorporates these into assumes...

Abstract. Forest ecosystems play a critical role in mitigating greenhouse gas emissions. carbon (C) is stored through photosynthesis and released via decomposition combustion. Relative to C fixation biomass, much less known about depletion of woody debris, particularly under changing climate. It assumed that the increased temperatures longer growing seasons associated with projected climate change will increase rates (i.e., more rapid cycling) downed debris (DWD); however, magnitude this has...

With the closure of several mills within state, industrial procurement managers became concerned about status and trends Minnesota's logging sector. A mail survey follow-up focus groups were conducted to assess health viability Although there are many businesses producing up 5,000 cords annually, those produce a small percentage total annual volume harvested, have oldest equipment, work during winter, operating at lowest level their reported capacity. Over time, has been trend toward larger...

Understanding the patterns of tree recruitment is essential to quantifying future health and productivity forest ecosystems. Using national inventory information, we incorporated browse impact measurements into models sapling (2.5–12.7 cm diameter at breast height (DBH)) overstory (≥12.7 DBH) ingrowth across northern United States. Ingrowth was modeled with standard zero-inflated techniques using discrete Poisson negative binomial distributions. Zero-inflated stand attributes impacts...