David L. R. Affleck

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0378-1127/$ see front matter 2011 Elsevier B.V. A doi:10.1016/j.foreco.2011.08.031 ⇑ Corresponding author. Tel.: +1 859 257 5666; fax E-mail addresses: marco.contreras@uky.edu (M.A umontana.edu (D. Affleck), woodam.chung@umontan Fire hazard reduction treatments are commonly applied to mixed-species coniferous forests in western Montana, USA, to modify fuels(More)
In many applications of line intersect sampling, transects consist of multiple, connected segments in a prescribed configuration. The relationship between the transect configuration and the selection probability of a population element is illustrated and a consistent sampling protocol, applicable to populations composed of arbitrarily shaped elements, is(More)
Confocal immunofluorescence microscopy of ovaries from juvenile frogs revealed changes in the organization, acetylation, and nucleation, of microtubules (MTs), and redistribution of gamma-tubulin (gamma-TB), during early oogenesis in Xenopus laevis. Interphase oogonia contained sparse, radially organized, MT arrays and prominent centrosomes, Acetylated MTs(More)
Accurate estimation of responses of understory plants to disturbance is essential for understanding the efficacy of management activities. However, the ability to assess changes in the abundance of plants may be hampered by inappropriate sampling methodologies. Conventional methods for sampling understory plants may be precise for common species but may(More)
A review of the challenges and opportunities in estimating above ground forest biomass using treelevel models Hailemariam Temesgen, David Affleck, Krishna Poudel, Andrew Gray & John Sessions a Department of Forest Engineering, Resources and Management, Oregon State University, Corvallis, OR 97333, USA b College of Forestry and Conservation, The University(More)
A com m on assumption o f rem ote sensing-based ligh t use efficiency (LUE) models fo r estimating vegetation gross primary productiv ity (GPP) is tha t plants in a b iom e m atrix operate at the ir photosynthetic capacity under optim a l c iim aticcond itions. A prescribed constant b iom e m axim um ligh t use efficiency parameter (LUEmax) defines the m(More)
Tree biomass is typically estimated using statistical models. This review highlights five limitations of most tree biomass models, which include the following: (1) biomass data are costly to collect and alternative sampling methods are used; (2) belowground data and models are generally lacking; (3) models are often developed from small and geographically(More)
Mounting concerns about global climate change have increased interest in the potential to use common forest management practices, such as forest density management with thinning, in climate change mitigation and adaptation efforts. Long-term effects of forest density management on total aboveground C are not well understood, especially for precommercial(More)