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Articles 1 - 13 of 13
Full-Text Articles in Forest Sciences
The Last Plant Standing - Ecosystem Assessment And Response To Human Disturbance In The Gordon Natural Area, West Chester University, Chester County, Pennsylvania, Katie Mohn, Frank Mcsherry, Rob Stabs, Michael Mcgeehin, Kristen Noble
The Last Plant Standing - Ecosystem Assessment And Response To Human Disturbance In The Gordon Natural Area, West Chester University, Chester County, Pennsylvania, Katie Mohn, Frank Mcsherry, Rob Stabs, Michael Mcgeehin, Kristen Noble
Gordon Natural Area Forest Restoration Project Documents
No abstract provided.
Collaborative Research: Developing Methods To Study Age-Related Changes In The Physiology Of Forest Trees, Michael S. Greenwood
Collaborative Research: Developing Methods To Study Age-Related Changes In The Physiology Of Forest Trees, Michael S. Greenwood
University of Maine Office of Research Administration: Grant Reports
Trees continue to increase in size and complexity over life spans that may last many centuries, and each year the growing regions of their shoots produce new foliage and reproductive structures. As they grow older and larger, forest trees appear to grow more slowly, produce thicker foliage and more reproductive structures. These changes are likely to be associated with age-related declines in the growth rates of forest stands, which occur before the mid-point of the lifespan of important timber species. Although similar patterns of age- and size-related change in the morphology and physiology of foliage have been described for numerous …
Diel Activity Patterns Of The Louisiana Pine Snakes (Pituophis Ruthveni) In Eastern Texas, Marc J. Ealy, Robert R. Fleet, D. Craig Rudolph
Diel Activity Patterns Of The Louisiana Pine Snakes (Pituophis Ruthveni) In Eastern Texas, Marc J. Ealy, Robert R. Fleet, D. Craig Rudolph
Faculty Publications
This study examined the diel activity patterns of six Louisiana pine snakes in eastern Texas using radio-telemetry. snakes were monitored for 44 days on two study areas from May to October 1996. Louisana pine snakes were primarily diurnal with moderate crepuscular activity, spending the night within pocket gopher burrows or inactive on the surface. During daylight hours, snakes spent approximately 59% of their time underground within gopher burrows, burned out/rotten stumps, or nine-branded armadillo (Dasypus novemcinctus) burrows. Remaining time was spent on the surface either close to subteranean refuge, or in long distance movements that generally terminet at …
Physiological And Growth Responses Of Midrotation Loblolly Pine To Treatments Of Fire, Herbicide, And Fertilizer, Emily J. Goodwin, Lisa M. Marino, Hans H. Williams, Brian P. Oswald, Kenneth W. Farrish
Physiological And Growth Responses Of Midrotation Loblolly Pine To Treatments Of Fire, Herbicide, And Fertilizer, Emily J. Goodwin, Lisa M. Marino, Hans H. Williams, Brian P. Oswald, Kenneth W. Farrish
Faculty Publications
The objectives of this study were to examine the effects of fertilizer and understory vegetation control (herbicide and prescribed fire) on mature tree physiology and to link observed physiological responses with tree growth. Photosynthetic rate (photosynthesis), transpiration, stomatal conductance, stem diameter, and crown area were measured in two midrotation loblolly pine plantations in East Texas. Rates of photosynthesis, E and gs for the midsummer measurements were significantly reduced by fertilizer treatments on both sites. Drought in east Texas during the last 3 years may have influenced this result. Trees receiving fire at the site with a comparatively more dense live …
Daily Movements Of Female White-Tailed Deer Relative To Parturition And Breeding, Christopher E. Comer
Daily Movements Of Female White-Tailed Deer Relative To Parturition And Breeding, Christopher E. Comer
Faculty Publications
To assess how white-tailed deer (Odocoileus virginianus) herd demographics influence reproductive behaviors, we examined 24-h diel movements of female whitetailed deer relative to parturition and breeding in a low-density population with a near even sex ratio at the Savannah River Site (SRS), South Carolina. We conducted a series of intensive, 24-h radio-tracking periods of 13 females during spring and fall 2002. We compared daily range (ha), rate of travel (m/h), and distance between extreme daily locations (m), among the periods of pre-parturition and post-parturition and pre-, peak-, and post-rut. From pre-parturition to post-parturition, we observed decreases in diel range size …
Influence Of Habitat And Number Of Nestlings On Partial Brood Loss In Red-Cockaded Woodpeckers, James R. Mccormick, Richard N. Conner, D. Brent Burt, Daniel Saenz
Influence Of Habitat And Number Of Nestlings On Partial Brood Loss In Red-Cockaded Woodpeckers, James R. Mccormick, Richard N. Conner, D. Brent Burt, Daniel Saenz
Faculty Publications
Partial brood loss in red-cockaded woodpeckers (Picoides borealis) was studied during 2 breeding seasons in eastern Texas. The timing of partial brood loss, group size, number of initial nestlings, number of birds fledged, and habitat characteristics of the group's cavity-tree cluster were examined for 37 woodpecker groups in loblolly- (Pinus taeda) shortleaf (P. echinata) pine habitat and 14 groups in longleaf (P palustris) pine habitat. Partial brood loss occurred slightly more in the loblolly-shortleaf pine habitat than in the longleaf pine habitat, largely because nests in loblolly-shortleaf habitat initially contained more nestlings. …
Fire In Southern Appalachians: Fuels, Stand Structure And Oaks, David L. Loftis, Mary A. Arthur, Rex Mann, Jeffrey Lewis
Fire In Southern Appalachians: Fuels, Stand Structure And Oaks, David L. Loftis, Mary A. Arthur, Rex Mann, Jeffrey Lewis
JFSP Research Project Reports
Managers responsible for maintaining the diversity and productivity of Southern Appalachian forests are increasingly turning to prescribed fire as an important management tool in oak dominated forests. The decision to use fire with increasing frequency and spatial extent is based, in part, on an emerging sense of the prehistoric significance of fire in this landscape and its potential to control the proliferation of fire-sensitive competitors in contemporary forests. While it is well documented that fire has been an important ecological force in Southern Appalachian forests for a very long time, there has been little research to demonstrate that prescribed fire …
Greening Connecticut Cities And Towns, Managing Public Trees And Community Forests, Glenn D. Dreyer, Robert M. Ricard
Greening Connecticut Cities And Towns, Managing Public Trees And Community Forests, Glenn D. Dreyer, Robert M. Ricard
Other Publications and Reports
No abstract provided.
Historical Reflections On The Arkansas Cross Timbers, Don C. Bragg
Historical Reflections On The Arkansas Cross Timbers, Don C. Bragg
Journal of the Arkansas Academy of Science
Kiichler's original map of potential natural vegetation suggested that the eastern-most extension of the "Cross Timbers" oak-dominated woodland reached into extreme western Arkansas. Recent investigations have found possible old-growth Cross Timber communities in narrow strips along steep, rocky sandstone and shale ridges near Fort Chaffee and Hackett. However, many decades of Euroamerican intervention have altered vegetation composition and structure in west-central Arkansas, making field evaluation difficult. Fortunately, historical accounts of the area provide considerable supporting documentation. General Land Office surveyors, for instance, traversed this portion of western Arkansas before 1850. They reported many ridges and slopes dominated by grassy, stunted …
Development And Light Response Of Leaves Of Metasequoia And Close Relatives, Xiaochun Li
Development And Light Response Of Leaves Of Metasequoia And Close Relatives, Xiaochun Li
Electronic Theses and Dissertations
Metasequoia glyptostroboides is a useful nearest living relative (NLR) of the Eocene fossil Metasequoia. Research on modern Metasequoia might give us some clues about its fossil counterpart. During this study the leaf anatomy of Metasequoia, Glyptostrobus, Sequoia and Taxodium was investigated with light microscopy and transmission electron microscopy. Metasequoia exhibits several characteristics of typical sciaphilic plants, such as slightly arched outer cell walls in the adaxial epidermal cells, strongly arched outer cell walls in the abaxial epidermal cells, mesophyll composed of spongy cells, chloroplasts with well-developed grana not only in mesophyll cells but in both the adaxial and abaxial epidermis. …
Effects Of Silvicultural Practices On Soil Carbon And Nitrogen In A Nitrogen Saturated Central Appalachian (Usa) Hardwood Forest Ecosystem, Frank S. Gilliam, David A. Dick, Michelle L. Kerr, Mary Beth Adams
Effects Of Silvicultural Practices On Soil Carbon And Nitrogen In A Nitrogen Saturated Central Appalachian (Usa) Hardwood Forest Ecosystem, Frank S. Gilliam, David A. Dick, Michelle L. Kerr, Mary Beth Adams
Biological Sciences Faculty Research
Silvicultural treatments represent disturbances to forest ecosystems often resulting in transient increases in net nitrification and leaching of nitrate and base cations from the soil. Response of soil carbon (C) is more complex, decreasing from enhanced soil respiration and increasing from enhanced postharvest inputs of detritus. Because nitrogen (N) saturation can have similar effects on cation mobility, timber harvesting in N-saturated forests may contribute to a decline in both soil C and base cation fertility, decreasing tree growth. Although studies have addressed effects of either forest harvesting or N saturation separately, few data exist on their combined effects. Our study …
Leaf Area Index - Relative Density Relationships In Even-Aged Abies Balsamea - Picea Rubens Stands In Maine, Robert Justin Derose
Leaf Area Index - Relative Density Relationships In Even-Aged Abies Balsamea - Picea Rubens Stands In Maine, Robert Justin Derose
Electronic Theses and Dissertations
Relationships between leaf area index (LAI) and relative density (RD) were examined in even-aged stands of Abies balsunzen (L.) Mill. and Piceu rubens Sarg. Twelve sites distributed across the Acadian forest in Maine were used to test conformance to three hypothesized models of LA1 over RD: A) constantly increasing LA1 over increasing RD, B) constant LA1 with increasing RD, or C) decreasing LA1 with increasing RD. Multivariate ordination suggested young, precommercially thinned (PCT), high-siteindex (SI) A. balsamea stands should be analyzed separate from older, unspaced (NOPCT), lower-site P. rubens stands. All-sided A. balsamea LAIs ranged from 6.2 - 14.8 over …
Growth Trends And Water Use Efficiency Of Pinus Pinaster Ait. In Response To Historical Climate And Groundwater Trends On The Gnangara Mound, Western Australia, Lindsay Bourke
Theses : Honours
In Western Australia, groundwater accounts for about 57% of Perth's water supply. The majority of this is from the Gnangara Mound, the largest superficial aquifer on the Swan Coastal Plain. Prior to the mid 1970's groundwater of the superficial aquifer reached a semi-steady state, however since this period levels have been steadily falling. This decline coincides with a dramatic change in Perth's climate, groundwater abstraction and maturation of pine plantations. The influence of pine plantations upon groundwater recharge is well understood, however there is paucity of information about groundwater use, in particular whether pines directly access shallow groundwater resources. This …