Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"standing dead"”.
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Stream temperature dynamics following riparian wildfire : effects of stream-subsurface interactions and standing dead trees
… (3) the net radiation dynamics associated with standing dead riparian vegetation. Stream temperature, riparian microclimate, and hydrology were characterized for a 1.5 km reach of Fishtrap Creek, located north of Kamloops, British Columbia. Within-reach air temperature and humidity variability …
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Annual secondary production of fungal and bacterial decomposers associated with standing and benthic litter of the freshwater emergent macrophyte, <i>typha angustifolia </i>
… through secondary decomposers. Two decay phases, standing-dead and benthic litter, were analyzed concurrently to determine fungal (<sup>14</sup>C-acetate incorporation) and bacterial (<sup>3</sup>H-leucine incorporation) production estimates. Gradual collapse of the 2004 cohort standing-dead …
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Stand structure, growth, and mortality in southern Appalachian spruce-fir
… where there was a greater proportion of standing dead fir than live fir. Unlike these two sites, Fraser fir on Mount Rogers still had escaped major damage from the adelgid. Projected leaf area index (LAI)(m²/m²) was developed for spruce, fir and yellow birch (Betula lutea Michaux f.), …
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Dynamics of cicrobial communities associated with <i>Typha angustifolia</i> (cattail) litter in a wetland ecosystem: Effects of litter manipulations on microbial decay processes
… in plant decomposition is important in understanding energy flow and nutrient recycling in wetlands. Prior studies examining emergent plant decomposition have often used litter that had been prematurely harvested (senescent) and/or manipulated (oven-dried). I examined the effects of litter …
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Biology of Fungi on Plants in the Sub-Antarctic
… mycoflora was markedly different from that of standing dead leaves. All of the most commonly isolated phylloplane species were capable of cellulose oxidation and all showed protease activity. Pectinase activity was exhibited by all of the phylloplane species tested. Only Botrytis cinerea …
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Monitoring Abundance of Ips Bark Beetles and Determining Related Tree Mortality in Arkansas and Texas
… were used to estimate and confirm the amount of dead and fading trees in each trapping site. Pine engraver beetles have historically been recognized as secondary invaders of healthy trees, but observations of pine mortality in Texas and Arkansas appeared to correspond with high population …
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Tropical forest structure: Ground measurements of coarse necromass and satellite observations of crown geometry
… same processes of disturbance and growth. Understanding forest structure can help unlock the history, function, and future of a forested ecosystem. Components of forest structure include tree size distributions, foliage distributions and variation in canopy density, and coarse woody debris …
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Missing baseline information for British Columbia's forests : can timber cruise data fill some gaps?
… in forest ecosystems requires a thorough understanding of a benchmark or condition against which changes can be measured. Timber cruise information is a valuable source of baseline data, and has potential to be used in monitoring the effectiveness of management actions taken to maintain …
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Understory Composition, Seedling Growth, and Snag Frequency Across a Water-Limited Forest Landscape
… of my fourth chapter was to determine how snag (standing dead tree) distribution is affected by individual- and stand-level biotic and abiotic variables. I used an unmanned aerial vehicle to collect images of forest canopies and determine the position and characteristics of individual live and …
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Ecological niche responses of small mammals to gypsy moth disturbance
… characterized as having more fallen logs and standing dead snags, greater shrub and herbaceous cover, and higher invertebrate abundances relative to the reference site. These changes in habitat structure provided small mammals with increased cover from avian predators, more food resources, and …
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Improved leaf area index estimation by considering both temporal and spatial variations
… reflectance, ground covers (grasses, forbs, standing dead, litter, and bare soil), and soil moisture data were collected over the sampling transect and plots from May through September, 2008. Satellite data used are SPOT 4/5 images and 16-day Moderate Resolution Imaging Spectroradiometer …
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Is meadowlark habitat segregation within sympatry behaviorally mediated?
… evidence necessary to provide a rigorous understanding of meadowlark habitat use within sympatry. At the patch scale, area-sensitivity, vegetation structure, and vegetation composition have been identified as important factors influencing habitat selection. It is also widely recognized that …
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Investigation into the plant ecology of the Karstland area in Namibia : with particular reference to the proposed large-scale abstraction of groundwater
… of the parameters such as the quantity of dead material, and the number of standing dead trees, reflected a general decline in vitality over the two year period. In view of the poor rainfall conditions, this decline was interpreted as that which can be expected under natural adverse …
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Long-Term Disturbance Histories Of Managed And Natural Mixed-Hardwood Forests Of Central Indiana
… the exception of the occasional removal of some dead or near-dead trees (removal of 5.8 trees ha<sup>-1<sup>; 5.3 m<sup>3<sup> ha<sup>-1<sup>). The single-harvest stand was selectively harvested in 1951 (removals of 18.4 trees ha<sup>-1<sup>; 8.1 m<sup>3<sup> ha<sup>-1<sup>), while the …
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The Role and Contribution of Saprotrophic Fungi during Standing Litter Decomposition of Two Perennial Grass Species, <i>Schizachyrium scoparium</i> and <i>Schizachyrium tenerum</i>
… These findings extend our current understanding of fungal processes in grasslands, which should be incorporated into existing models depicting major biogeochemical pathways.</p>
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Diversität und Ökologie holzbewohnender Pilze in Khonin Nuga, Westkhentey, Mongolei
Die vorliegende Arbeit befasst sich zum ersten Mal mit Vielfalt und Ökologie holzbewohnender Pilze in der Mongolei. Das Untersuchungsgebiet Khonin Nuga befindet sich im Westkhentey im Nordosten der Mongolei und gehört zur Pufferzone des Streng Geschützten Gebietes Khan Khentey. Die Untersuchungen …