TY - THES T1 - Navajo space use under conditions of increasing sedentism T2 - Anthropology Y1 - 1993 A1 - Dana Oswald JF - Anthropology PB - University of New Mexico VL - PhD UR - no copy on file in LTRR ER - TY - THES T1 - Holzanatomische Untersuchungen zur Rekonstruktion der Feuergeschichte eines Bestandes von Pinus ponderosa Laws. in den Santa Rita Mountains, Arizona Y1 - 1992 A1 - Wolfgang Ortloff KW - Arizona KW - german KW - ponderosa pine KW - santa rita KW - santa rita mountains PB - Universitat Freiburg N1 -

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ER - TY - THES T1 - The Implications of Atmospheric Pollen Rain for Fossil Pollen Profiles in the Arid Southwest T2 - Geoscience Y1 - 1986 A1 - O’Rourke, Mary Kay AB - I compared atmospheric and soil pollen values to determine taphonomic influences on pollen in Southwestern soils. Burkard traps sampled atmospheric pollen for six years from multiple sites in Tucson, Arizona. Tauber and soil samples were collected for two years at Tumamoc Hill (Tucson). Morus, Ambrosia, Gramineae, and Chenopodiaceae-Amaranthus characterize Tucson’s airborne pollen. Artemisia, Garrya and summer Pinus pollen are transported from the mountains. Annual pollen capture is similar between Burkard and Tauber samplers. Atmospheric pollen is seasonally variable; annual variability is low. Spatial variability among sites is low. Pollen concentrations vary widely among sites, but taxonomic composition remains constant. Reentrained soil pollen comprises 11% of the airborne pollen. Gramineae and Chenopodiaceae-Amaranthus pollen comprise 90% of the reentrained pollen. Pollen reentrainment varies seasonally. High maximum and minimum temperatures, low dew point and moderate wind speeds are associated with maximum atmospheric pollen concentrations. Winds preceding summer storms cause increased pollen concentrations. Deterioration characterizes pollen from soils. Chenopodiaceae-Amaranthus, Ambrosia, Other Compositae and Graminear are commonly found; Morus is rarely found. Pinus, Sphaeralcea, Boerhaavia and Kallstroemia are present in low numbers. These taxa have thick pollen walls, and they resist destruction. Seasonally collected soil samples have similar pollen spectra. Seasonal airborne pollen variability does not affect the soil pollen spectra. Inoculated soil pollen is well preserved, but pollen is lost rapidly. After one year, pollen concentrations approached background levels for seven of the eight pollen taxa tested. Solidago remained an order of magnitude higher. Pollen morphology may play a role in differential pollen loss. Pollen from the inoculated plots is lost through post-mortem transport. Pollen in soils is time-averaged and exhibits little temporal variability. The average airborne pollen spectra differs from the pollen in the soil. Soil pollen was degraded; inoculated plot pollen was well preserved. I conclude airborne pollen contributes little to the soil pollen of Tumamoc Hill. The soil pollen spectra is affected by selective- or non-deposition of airborne pollen (e.g. Morus), differential pollen destruction, and differential post mortem transport. JF - Geoscience PB - University of Arizona VL - PhD UR - http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=748690901&sid=6&Fmt=2&clientId=43922&RQT=309&VName=PQD ER - TY - THES T1 - Climate and Society in Iceland from the Medieval Period to the Late Eighteenth Century Y1 - 1981 A1 - Ogilvie, Astrid Elisabeth Jane PB - University of East Anglia VL - PhD ER - TY - THES T1 - Kaibab Deer and Dendrochronology: Relating Climate, Trophic Structure, and Succession Y1 - 1977 A1 - Young, Craig PB - Arizona State University VL - MS ER -