Life Sciences Commons^™

Low Temperature Induces Two Growth-Arrested Stages And Change Of Secondary Metabolites In Bursaphelenchus Xylophilus, L. L. Zhao, W. Wei, David L. Kulhavy, Xing Yao Zhang, Jiang Hua Sun

Faculty Publications

The third-stage dispersal juvenile (JIII) is the stage for survival and dispersal in the winter of the pine wood nematode,

Bursaphelenchus xylophilus. Through investigations at different temperatures, we found two kinds of growth-arrested development, including the adult longevity extension and JIII formation induced by low temperature. They showed similar characters: densely packed lipid droplets and extended longevity. We considered that there were four stages in the formation of growth-arrested stages: induction, growth-arrested pathway, growth-arrested development and cold-tolerance duration. Moreover, at 4◦C there were significant changes in secondary metabolites, which may be related to signal communication and metabolism associated with …

Etpprp Accomplishments - Fall 2007, The East Texas Pine Plantation Research Project, Arthur Temple College Of Forestry And Agriculture

Accomplishments and History

"The ETPPRP is a long-tenn comprehensive research program investigating the factors affecting the management of loblolly and slash pine plantations in East Texas. The Arthur Temple CoUege of Forestry and Agriculture at Stephen F. Austin State University conducts the ETPPRP in coordination with private landowners, primarily TIMOs and REITs."

Spatial Ecology Of The Coachwhip, Masticophis Flagellum (Squamata: Colubridae), In Eastern Texas, Richard W. Johnson, Robert R. Fleet, Michael B. Keck, D. Craig Rudolph

Faculty Publications

We radio-tracked nine Masticophis flagellum (Coachwhips) to determine home range, habitat use, and movements in eastern Texas from April to October 2000. Home ranges of Coachwhips contained more oak savanna macrohabitat than early-successional pine plantation or forested seep, based on the availability of these three macrohabitats in the study area. Likewise, within their individual home ranges, Coachwhips used oak savanna more than the other two macrohabitats, based on availability. An analysis of microhabitat use revealed that, relative to random sites within their home range, Coachwhips were found at sites with fewer pine trees and more herbaceous vegetation taller than 30 …

Red-Cockaded Woodpecker Foraging Behavior, D. Craig Rudolph, Richard N. Conner, Richard R. Schaefer, Nancy E. Koerth

Faculty Publications

We studied Red-cockaded Woodpeckers (Picoides borealis) to examine the effect of status and gender on foraging behavior. Foraging behavior of breeding pairs extended beyond separation by foraging height to include zones (bole, trunk in crown, primary limb, secondary limb) of the tree used and foraging methods (scaling, probing, excavating). Helper males and juvenile females maintained partial spatial separation from breeding adults. Helper males maintained spatial separation from breeding adults by exploiting limbs within tree crowns in both longleaf (Pinus palustris) and loblolly-shortleaf (P. taeda, P. echinata) pine forests, but also increased use of boles in loblolly-shortleaf pine in concert with …

Landscape Analysis Of George W. Pirtle Scout Reservation, David Kulhavy, Daniel Unger, Frank B. Shockley, Josh Bardwell

Faculty Presentations

To assist in detecting change over time for the forested landscape of George W. Pirtle Scout Reservation, Panola County, Texas, digital ortho-photography imagery (acquired 1996 and 2004) were used to designate forest cover types and hazard rating for forest insects and diseases. Status of camp grounds was ascertained and recommendations made for management using the GIS database created for the camp.