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 10 of 10 for “"self-thinning"”.
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The allometry of territory size and metabolic rate as predictors of self-thinning in young-of-the-year Atlantic salmon (Salmo salar)
Self-thinning is a progressive decline in population density caused by competitively induced losses in a cohort of growing individuals and is frequently depicted as: $\log\sb{10}$ (density) = $\rm c -\beta\log\sb{10}$ (body mass). In mobile animals, two self-thinning mechanisms have been proposed. …
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Modeling maximum size-density relationships of loblolly pine (Pinus taeda L.) plantations
Self-thinning quantifies the reduction in tree numbers due to density-dependent mortality. Maximum size-density relationships (MSDRs) are a component of self-thinning that describe the maximum tree density per unit area obtainable for a given average tree size, often quadratic mean diameter (D). An …
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Vegetation community development eight years after harvesting in small streams buffers at the Malcolm Knapp Research Forest
… the older stands. In the unharvested controls, self-thinning continues and there has been 30% mortality of mostly smaller trees over the past 8 years. However, overstory density remains high. The 0m buffer was quickly colonized by shrubs and ferns and within the last 2 years has become dominated …
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The development of Mazzaella capensis (J.Ag.) Fredericq in culture, in the field, and the effect of environmental factors
… as it did not exhibit characteristics of self-thinning.
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Estimation and Determination of Carrying Capacity in Loblolly Pine
… of three diameter-based MSDR measures: Reineke's self-thinning rule, competition-density rule and Nilson's sparsity index, were evaluated. Estimates from three MSDR measures were compared with estimates from the Chapman-Richards (C-R) equation fitted to the maximum stand BA observed on plots from …
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Growth and demography of Quercus coccinea and Q. prinus ramets and genets after clearfelling
… YRl-2 but was near normal for the oldest site. Self-thinning within genets was slightly faster for scarlet oak and increased with site quality. The thinning lines had an average slope of approximately -0.9, which is similar to other clonal species, but deviates substantially from the -3/2 …
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Stand Density Management for Optimal Volume Production
… design and other pitfalls. Using data from two thinning studies representing non-intensively and intensively managed plantations, one spacing trial, and one thinning experiment a comprehensive analysis was performed to examine the growth-density relationship in loblolly pine. Volume production …
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Drivers of forest dynamics: Joint effects of climate and competition
… of within stand diversity under consideration of self-thinning was assessed. It was shown that ecotype mixing in forest stands might lower the risk of yield losses and at the same time might exempt the portfolio effect from its drawback of lower chances for high yields. Climate not only affects …
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Single polymer dynamics in semi-dilute solutions: linear and ring polymers
… with the optically-detected elastocapillary self-thinning dripping-onto-substrate (ODES-DOS) extensional rheometer. Overall, this thesis aims to provide a fundamental molecular picture of polymer dynamics in the semi-dilute concentration regime and for different polymer architectures. …
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Tropical bracken, a powerful invader of pastures in South Ecuador: Species composition, ecology, control measures, and pasture restoration
… better nutrient supply from the ash. Subsequent self-thinning reduced the density of the leaves to a stable level within two years. In a laboratory experiment, the effects of heat pulse by a simulated bushfire on the bracken rhizomes were investigated. Separated long and short shoots were heated …