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 9 of 9 for “"harvesting intensity"”.
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The effects of harvest intensity and seedbed type on germination and early survival of balsam fir and white spruce in the southern boreal forest
… negatively affected by an increase in harvest intensity. The reverse effects of harvesting intensity were observed during subsequent survival, where spruce was much more affected than fir by a reduction in canopy cover. Cumulative survivorship analyses showed that clearcuts without slash were …
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Relationships Between Streamside Management Zone Width and Biotic Communities of Headwater Streams in West Virginia
… However, research concerning the SMZ width and harvesting intensity required to maintain water quality and biotic communities is limited. The goal of this study is to evaluate the efficacy of different SMZ widths and forest harvesting intensities within SMZs, in maintaining the water quality and …
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Predicting the ecosystem effects of harvesting beach-cast kelp for biofuel
… CO2 concentrations. Model simulations of wrack harvesting predicted an immediate decline in primary consumers in direct proportion to the quantity of wrack removed, and a slow decline in shorebirds in response to reduced prey. Primary consumers were predicted to recover to their pre-harvest …
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Logging in the Streamside Management Zone: Effects of Harvesting System and Intensity on Visual Soil Disturbance
… protect and maintain water quality during timber harvesting operations. In the southeastern United States timber harvesting is typically allowed inside the SMZ, but there is little information regarding suitable types of harvesting systems and the acceptable amount of canopy cover. The effects of …
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Soil Carbon, Nutrients, and Phosphorus Fractions: Responses to Weed Control and Harvest Residual Retention in two 10-Year-Old Douglas-fir (Pseudotsuga menziesii) Stands of the Pacific Northwest
… forest management techniques such as whole-tree harvesting and use of herbicides to control weeds can have an effect on nutrient cycling and nutrient pool sizes in the mineral soil. This study was conducted to measure differences in soil carbon (C), nutrient pools, or phosphorus (P) fractions …
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The sustainability of crayfish harvesting in Madagascar
… thesis I assess the sustainability of crayfish harvesting in and around Ranomafana National Park, an area well known for its reliance on crayfish harvesting. Six taxa (belonging to four described species) are found in the Ranomafana area. Most families in villages with access to forest carry out …
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The Influence of Selection Silviculture Biomass Harvesting on Soil Carbon, Nutrients, and Respiration in a Northern Mixed-Deciduous Forest
… in forest structure, silvicultural methods, and intensity and heterogeneity of disturbances. Without a comprehensive understanding of how soil biogeochemical processes respond to different types and intensities of harvesting disturbances, we cannot accurately predict losses and ecological …
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Marine alien species of South Africa : threats and opportunities
… A1. galloprovincialis in the Northern Cape, a harvesting project operated by two impoverished coastal communities was initiated. Harvesting took place on a rotational basis and twelve sites, nested within four harvesting locations, were each exposed to spectrum of harvesting intensities (F=O, …
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Modeling the interactions of forest cutting and climate change on the hydrology, biomass and biogeochemistry of a northeastern forest
… regional environmental disturbances, including harvesting and climate change, can lead to integrated and interactive effects on forest ecosystems, altering their structure and function, and therefore long-term sustainability. Understanding both short- and long-term impacts of harvesting …