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 “"macroscopic charcoal"”.
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A Regional Synthesis of Post-Glacial Fire History in the Eastern Cascades, Washington, Using Macroscopic Charcoal Analysis
… developed to reconstruct fire history from macroscopic charcoal-based records, is appropriate for use with charcoal records from the eastern Cascades of Washington. The second major objective was to develop a regional synthesis of post-glacial fire activity for the eastern Cascades using the …
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A 4700-Year Record of Lake Evolution and Fire History for Laguna Limon, Dominican Republic
… can originate from natural or human ignition. Macroscopic charcoal (>125 "m) deposited into lake sediment is a record of a local fire event, whereas microscopic charcoal indicates fire activity on a broad landscape scale. Patterns of charcoal deposition may shed light on both human activities …
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Two Post-Glacial Sagebrush Steppe Fire Records at the Wildland-Urban Interface, Eastern Cascades, Washington
… Lake sediment cores were analyzed using macroscopic charcoal analysis and CharAnalysis software. Relationships between past fire, vegetation, human activities, and climatic drivers, such as the Early Holocene Warm Period, the Medieval Climate Anomaly, the Little Ice Age, and El-Niño …
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Postglacial Reconstruction of Fire History from a Small Lake in Southwest Yukon using Sedimentary Charcoal and Pollen
… collected from a small lake in southwest Yukon. Macroscopic charcoal was counted throughout the core at 0.5-cm contiguous intervals. The core was also analyzed for loss-on-ignition and magnetic susceptibility. Fossil pollen preserved in the lake sediment was analyzed to determine vegetation …
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A 1000-year sedimentary record of hurricane, fire, and vegetation history from a coastal lagoon in southwestern Dominican Republic
… cal YBP. All pollen slides contained microscopic charcoal indicating the occurrence of regional or extra-local fires over the last ~1000 yrs. Local fires, as indicated by macroscopic charcoal, occurred before ~434 cal YBP and may be tied to hurricanes, increased moisture in the region (thereby …
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Post-Glacial Fire History of Horsetail Fen and Human-Environment Interactions in the Teanaway Area of the Eastern Cascades, Washington
… Livingstone piston corer. High-resolution macroscopic charcoal analysis was used to reconstruct the fire history of the Horsetail Fen watershed. The chronology of the sediment was determined using radiocarbon (<sup>14</sup>C) dating and tephra layer identification. Results of this study …
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Postglacial Fire, Vegetation, and Environmental Change in the Sinlahekin Wildlife Area, Okanogan County, Washington (USA)
… the past ~12,210 calendar years before present. Macroscopic charcoal and pollen analysis were used to reconstruct the postglacial environmental history of the site. Results show that fire maintained a constant presence on the landscape and has been closely linked to fuel availability, until Euro …
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A stable isotope and macro-charcoal sediment record spanning the Pleistocene-Holocene transition from Maple Pond in the southern Shenandoah Valley, Virginia, USA
… deposition to sustained organic accumulation. Macroscopic charcoal concentrations reveal a mid-Holocene maximum (40–49 cm depth; ~6,000–5000 cal yr BP), attributed to increased regional fire activity, possibly related to warmer drier conditions during the Mid-Holocene Maximum and a shift to …
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Holocene Fire History Reconstruction of a Mid-Evaluation Mixed-Conifer Forest in the Eastern Cascades, Washington
… the Long Lake watershed was reconstructed using macroscopic charcoal analysis and pollen analysis was used to reconstruct vegetation change through time. Charcoal results show low fire activity in the early Holocene and the first half of the middle Holocene. After ca. 6000 calendar years before …
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Novel disturbance regimes in the Arctic: paleoecological perspectives on fire and thermo-erosion from Alaskan tundra
… To address my first question (Chapter 2), I used macroscopic charcoal stored in lake sediments to reconstruct past fire regimes from sites located in several Alaskan tundra ecoregions, which span a variety of modern vegetation and climate combinations. These paleofire records, spanning the past …