David M. Hix

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The species composition and diversity of the ground flora (vascular plants less than one meter in height excluding tree seedlings) were compared between sixteen mesic northeast-facing and sixteen dry southwest-facing middle slopes in southeastern Ohio. On each aspect, eight of the plots were located in second-growth forest stands (70 to 90 years in age) and(More)
Tree regeneration outcomes are challenging to generalize and difficult to predict. Many tree species can establish new propagules in a variety of post-disturbance environments and many different reproductive mechanisms may be used. In order to develop conceptual models that accurately reflect reproductive potential, we need a better understanding of the(More)
Hix, D.M., Barnes, B.V., Lynch, A.M. and Witter, J.A., 1987. Relationships between spruce budworm damage and site factors in spruce-fir-dominated ecosystems of western Upper Michigan. For. Ecol. Manage., 21:129-140 Damage by the spruce budworm, Choristoneura fumiferana {Clemens), on balsam fir, Abies balsamea (L.) Mill., in local ecosystems (site units) of(More)
Clearcutting, a commonly used silvicultural practice in southeastern Ohio, often results in a forest stand with a different species composition than the parent stand. The time frames during which shifts in species composition occur on different sites are unclear. While some studies have documented species composition at specific points in time, none have(More)
Snags (dead-standing trees) are biological legacies that remain after disturbances in forests. We enhanced the ecological underpinnings of snag management within the context of mixed-pine forest restoration in the northern Lake States by quantifying characteristics of live trees and snags within eighty-five 500-m2 plots at Seney National Wildlife Refuge(More)
Less than 1% of the pre-European settlement forest in Ohio currently remains, mostly as small and scattered woodlots. Consequently, few studies have been undertaken to quantify the composition and structure of Ohio’s old-growth forests using a landscape ecosystem perspective. We used an existing multifactor ecosystem classification system developed for the(More)
Null mutants of the neural-specific gamma-isotype of protein kinase C (gamma-PKC) have demonstrated differential responses to acute administration of ethanol in comparison with wild-type animals. Previous studies have shown that the mutants are less sensitive to ethanol-induced loss of righting response. Null mutants also consume more ethanol and exhibit(More)
In contrast to intermediate treatments, the primary objective of harvesting in a mature stand is to regenerate or reproduce a new forest stand. Depending on the regeneration method used, large or small openings may be created in the stand. If the stand is regenerated using one to three harvests spaced over a short period of time, the new stand will consist(More)
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