David H. Van Lear

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The longleaf pine-grassland (Pinus palustris-Poaceae) ecosystem occupied over 30 million ha in the southeastern United States at the time of European discovery. Frequent lowto moderate-intensity surface fires ignited by both lightning and native Americans sustained open diverse stands in a fire climax and prevented succession to mixed hardwood forests.(More)
Regenerating oak stands on productive upland sites in the Piedmont region is a major problem because of intense competition from yellow-poplar. As a potential solution to this problem, we tested the hypothesis that a shelterwood harvest of an oakdominated stand. followed several years later by a prescribed fire, would adequately regeneraie the stand. Three(More)
Regenerat ing oak stands on product ive uplandsires i s widely recognized byfores ters as a major problem in hardwood management. Recent research indicates &at oak regeneration is more resismnt to surface fires than its primary competitors on these sites ifburning occurs 3 to 5 yr after a partial overstory harvest. 7Xs combinat ion of cutting fol lowed by(More)
Natural resource management must integrate commercial development and use of forest resources with the maintenance of ecological values. The "New Perspectives" program of the U.S. Forest Service is responding to increased public environmental awareness and legislative mandates in placing a greater emphasis on ecosystem sustainability and non-traditional(More)
Effects of prescribed fires on the 1-year establishment of white oak seedlings were investigated on the Clemson Experimental Forest, South Carolina, USA. Three stands, each consisting of a burn and a control treatment of about 1 ha in size, were examined in the study. On each burn and control treatment, six to eight dominant white oak trees were randomly(More)
Slash pine seedlings on Bladen, Leon, and Lakeland soils responded differently to P and N fertilization. Seedling growth was increased by all treatments on Bladen soil, whereas responses by seedlings on the other soils were nil. All soils were low in extractable P with both Bladen and Lakeland yielding 0.85 ppm P. Growth response to fertilizer was positive(More)
The size, especially the root size, of advance oak (Quercus spp.) reproduction provides the best indication of the growth potential afer release or top-kill. This study examined the relationship between the size of the root system and various diameterheight measurements for small (<60 cm) white oak (Q. alba L.) seedlings. Diameters measured at the top of(More)
INTRODUCTION In the past 20 years, the perceived role of fire in mixed-oak forests has changed from a solely destructive force to be prevented, to acceptance of its historical role in perpetuating mixed-oak forests, to active research on the effects and potential uses of prescribed fire as a regeneration tool. This research has produced a wide variety of(More)
Although the silvicultural use of prescribed fire has been researched for almost 70 years, new advances are still being made. These advaace~ are primarily the result of (1) a better under%andktg of fire as an ecological process and (2) the use of this knowledge to restore declining ecosystems, save threatened and endangered species, enhance natural beauty,(More)
—Fire has been an imperative ecological force that has shaped the natural history and<lb>culture of the Southeastern Coastal Plain. In the past, humans have influenced the “ natural” role<lb>of fire in the southeast, first by Native Americans, then by Spanish and other European settlement,<lb>and finally by modern culture. As human culture developed, fire,(More)