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Showing 1 to 20 of 37 for “"canopy structure"”.
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Modeling canopy structure effects on loblolly pine growth
This study examined several aspects of canopy structure and their influence on growth of loblolly pine (Pinus taeda L.) plantations. Foliage distribution, crown hydraulic architecture, and the effect of chronological changes in canopy structure on stand development were explored as possible …
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Assessing the cumulative impact of disturbance on canopy structure and chemistry in Appalachian forests
… the cumulative impact of disturbances on canopy structure and chemistry, we can gain insight into management strategies, assess a variety of ecosystem services, and even contribute to a larger body of knowledge on global climate change. I transformed a series of Landsat images spanning …
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The Effects of Lodging on Soybean Yields, Canopy Structure, Light Use Efficiency and Other Physiological Factors
Made available in DSpace on 2014-12-10T17:12:51Z (GMT). No. of bitstreams: 1 7105045.pdf: 4393402 bytes, checksum: f3817af28a0d7140d70a3173a96e24a0 (MD5) Previous issue date: 1970
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Quantifying water use by temperate deciduous forests in South Korea : roles of species diversity, canopy structure, and complex terrain
… and forest water use, (2) examine the impact of canopy structure on forest transpiration, and (3) evaluate the influence of terrain on forest water use. Site-specific studies were carried out in three different natural deciduous forests, namely, Gyebang (GB), Gwangneung (GN) and Haean (HA) forest …
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Spatial distribution and density of the Lar gibbon Hylobates lar and Siamang Symphalangus syndactylus in relation to canopy structure and disturbance in a lowland dipterocarp forest, Sumatra.
Forest structure is an important factor in the persistence of arboreal primates, and understanding the relationship between primate populations and habitat characteristics is essential for their conservation. Indonesia is experiencing one of the highest rates of deforestation globally, and with …
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DISTRIBUTED ENERGETICS OF BOREAL FOREST SNOWMELT
… examined with respect to the influence of forest canopy structure on the snow cover depletionrate. The distribution of snow water equivalent was examined prior to melt and during melt in five distinct boreal forest environments, and the distribution of melt rate was quantified for each …
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Effects of Climate, Forest Structure, Soil Water, & Scale on Biosphere-Atmosphere Gas Exchange in a Great Lakes Mixed-Deciduous Forest
… atmosphere. Over forested canopies, the physical structure of vegetation interacts with the wind by exerting drag on the flow, thus generating turbulent mixing that is necessary for scalar transport. These interactions occur across a variety of spatio-temporal scales (microscopic to global; …
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Hydrodynamic Effects of Salt Marsh Canopies and their Prediction using Remote Sensing Techniques
… of tidal flows centre around poor assessments of canopy structure and mechanical properties. The validity of such simplified and reductionist assessments of canopy structure were tested and found to contribute considerable error in estimations of canopy frontal area and canopy drag. New metrics to …
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Preliminary Test Predictions for Scale Ram-Air Parachute Testing
… considerably on the ability to resolve the canopy geometry. Therefore, a CAD geometry generation is implemented for flexible control of the canopy structure by implementing design parameters, e.g., chord, span and planform shape. Distortions caused by inflation and suspension line tensions …
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The Influence of Overstory Structure on Understory Light Availability in a Longleaf Pine (Pinus palustris Mill.) Forest
… photographs used to estimate weighted canopy openness and gap fraction were effective methods, but gap light index (GLI) also derived from hemispherical photographs performed better. Accuracy of daily %PPFD estimates using %PPFDovercast, weighted canopy openness, and gap fraction were …
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Elevated Atmospheric Carbon Dioxide and Ozone Concentrations Alter Leaf Area Index Through Changes in Leaf Production and Expansion
… effects of elevated [O3] on leaf growth and canopy structure.
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The Effect of Elevated Carbon Dioxide and Ozone on Soybean Development, Leaf Anatomy and Productivity
… expected to result in a proportional increase in canopy photosynthesis or gross primary production (GPP). A draw-back of FACE is that GPP cannot be measured directly. Measurements of micrometeorology, leaf photosynthetic properties and canopy structure were combined in an adapted version of the …
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Soybean Growth and Yield Response to Seeding Rate in Virginia
… expanded to include two cultivars, differing in canopy structure, within each MG in 2019 and 2020. On-farm research compared a high and low seeding rate with a 100,000 seed ha-1 difference based upon grower current practices. To determine growth influence on the yield response, normal difference …
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Characterizing vegetation structure using waveform LiDAR
The structure of light penetration through the canopy plays an important role in water, carbon, and energy fluxes between the biosphere and the atmosphere. Total foliage and foliage distribution are major aspects of canopy structure that significantly influence light and vegetation interaction. …
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The effects of intermediate-scale wind disturbance on forest composition, structure, and succession with implications for management
… impart lasting legacies on forest composition, structure, and stand development. Intermediate-scale disturbances may promote stand heterogeneity, including uneven-aged structure, and their effects can range in size and distribution from small, patchy gaps to the removal of large portions of …
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Classification and dynamics of the forest vegetation of Hluhluwe Nature Reserve, Kwa Zulu-Natal
… TWINSPAN and CANOCO. The composition of the canopy and subcanopy is distinct. Four canopy and two subcanopy communities can be detected. Community succession in the mature forest takes the form of almost random replacement of canopy trees through two subcanopy communities. Size-class …
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Top-down or bottom-up?: Impacts of giraffe browse and water abstraction on two keystone tree species of the Kgalagadi Transfrontier Park
… on the reproductive output and vegetation structure of Acacia erioloba and Acacia haematoxylon in the Kgalagadi Transfrontier Park. I determine the impact of giraffe on canopy structure and reproductive potential of the two tree species by comparing three zones of giraffe density (high, …
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The Development Of Old-Growth Structural Characteristics In Second-Growth Forests Of The Cumberland Plateau, Kentucky, U.s.a.
… exist that might be redeveloping old-growth structure and function. To assess the development of old-growth forest characteristics in second-growth forests, 70 - 90 year old (young) and 140 - 160 year old (old) hardwood forests in the Daniel Boone National Forest were examined for a suite of …
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Spatial Ecology of Bobcats (Lynx rufus) in the Appalachian Mountains of Western Virginia
… that bobcats select for locations near open canopy structure, and avoid forest interior. These findings build upon previous findings regarding bobcat diet and population dynamics to provide a comprehensive understanding of basic bobcat ecology in western Virginia, and will inform further …
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Remote sensing of grassland with contaminated soil using the spectral red-edge
… transfer modelling (using a coupled leaf and canopy model,<br/>LIBSAIL) showed the influence of vertical layering in the grassland canopy. The influence<br/>of a vegetated under-storey on the red-edge was found to be greatest when<br/>different absorption spectra were present and high …
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