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Showing 1 to 20 of 35 for “"pollen analysis"”.
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Pollen analysis, chronology and palaeomagnetism of three Late Weichselian sites in southern Sweden
… lake sediments were studied with respect to pollen analysis and palaeomagnetism. The chronologies are based on pollen stratigraphical correlations, radiocarbon dating and, for two of the sites, on a clay-varve chronology. The stratigraphies were correlated to the GRIP event stratigraphy and …
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Holocene vegetation and palaeoenvironments of the Southern Cederberg mountains of South Africa : palynological evidence from fossil hyrax (Procavia) dung middens
… regions (such as southern Africa) lack fossil pollen because of the scarcity of pollen preserving bodies. This attribute results in difficulties in palynological studies regarding the late Quaternary vegetation and palaeoenvironmental resconstruction in arid and semi-arid regions. But the …
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Phylogeography and population genetics of two forest endemic mosses in the Cape Floristic Region
… hypothesized from vegetation biogeography and pollen analysis. However, the history of forests is still controversial. Phylogeography uses gene genealogies to infer history of distributions. Two forest endemic moss species were sampled: Leptodon smithii; and Neckera valentiniana. Two gene …
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Holocene Fire History Reconstruction of a Mid-Evaluation Mixed-Conifer Forest in the Eastern Cascades, Washington
… 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 present (cal yr BP) …
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Late quaternary vegetation history and palaeoenvironments of the Cederberg Mountains, South Africa : evidence from hyrax (Procavia capensis) middens
… and sampled. Through the application of pollen analysis to the midden material, local plant communities were inferred and a palaeoenvironmental reconstruction of prevailing conditions over the period of accumulation was produced. An assessment of the overall pollen assemblages indicates …
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Holocene landscape history of southern Portugal
… research. In particular, the scarcity of dated pollen studies has meant that inferences regarding the vegetation history of the Algarve and related aspects of landscape evolution have had to be drawn from distant sites. Palaeoecological research has been hindered by the lack of suitable sites …
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Certain syndrome or complex conundrum? : the pollination of Erica lanuginosa
… a likely pollinator. Rodent trapping and pollen analysis of faecal matter showed it unlikely to be pollinated by a rodent. Flowers excluded from external pollination showed no seed set, hence it is not considered to be self-pollinated. Nectar analysis are inconclusive as an indicator of …
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VOLCANIC EMISSIONS AND DISTAL PALAEOENVIRONMENTAL IMPACTS IN NEW ZEALAND
… tephra deposition. The methods used included pollen analysis, and the relatively new technique of Energy Dispersive X-ray Micro Analysis (EDMA) which investigated changes in sediment geochemistry to provide further information on local environmental change following tephra impact. The use of …
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Analysis of Fossil Pollen from a Pleistocene Cypress Forest Preserved on the Northern Gulf of Mexico Continental Shelf
<p>This study presents the findings of fossil pollen analysis performed on terrestrial sediments preserved on the northern Gulf of Mexico continental shelf (site hereafter known as the Underwater Forest or DF). This research aims to establish vegetation composition on a continental shelf glacial …
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The Effects of Snowmelt Percolation on Stratified Pollen Records: A Cooler Study
… with the possibility of very high-resolution pollen analysis. However, little is known about the effects of meltwater percolation on pollen found in snow and glacial ice. Previous studies have suggested that pollen is relatively impervious to meltwater percolation due to grain size and, thus, …
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Paleoecology of late quaternary Molluscan-Ostracod assemblages from the Norwood site, southeastern Minnesota
… terrestrial or marginal lacustrine environment. Pollen analysis indicated that the lake was surrounded by tundra and, later, a spruce forest.</p>
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A 1000-year sedimentary record of hurricane, fire, and vegetation history from a coastal lagoon in southwestern Dominican Republic
… hurricanes between ~321 cal YBP and present day. Pollen analysis documented 32 plant families with most levels dominated by pollen of Fabaceae (legumes), the Urticales order, and Cyperaceae (sedges), though families of upland and montane vegetation are also present ~510-996 cal YBP. All pollen …
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Postglacial Fire, Vegetation, and Environmental Change in the Sinlahekin Wildlife Area, Okanogan County, Washington (USA)
… 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 American settlement (ca. …
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Palaeoecological studies of selected mires in the Craven District of West Yorkshire with special reference to the late Devensian period and the Ulmus decline
(1) Percentage and absolute pollen diagrams are presented for a lowland site, Sniddle Moss, and two upland sites, Thieves' Moss and Sunset Hole, in the Ingleborough Region, the Craven District, north-west Yorkshire. (2) The analysis of the earliest sediments of Sniddle Moss and Thieves' Moss …
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A high-resolution palaeoecological study of land use change during late prehistory on Exmoor
… and Northwest Europe. High resolution records of pollen, NPP and charcoal data are presented, stemming from three upland sites on Exmoor: Great Buscombe, Spooners and Codsend Moors. Sequences are dated with the use of radiocarbon dates and recently identified tephra layers, enabling a better …
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The late holocene vegetation history of Lake Farm, South Eastern Cape Province, South Africa
Palynological analysis of organic sediments from a freshwater lake near Port Elizabeth (34°S,25°30'E) has provided a high- resolution vegetation history of the area for the last 2200 years. Detailed identification and counting of the fossil pollen resulted in the generation of a pollen diagram. …
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Identification of Fossil Wood from the Specimen Creek Area of the Gallatin Petrified Forest, Yellowstone National Park, Montana
… wood stumps were compared with previous pollen analysis of the same layers. In a few cases correlation was observed between fossil stumps and fossil pollen of associated organic levels whereas in most cases no fossil pollen correlated with the adjacent stumps. Overall, correlation was …
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Characterising the Namaqualand Mudbelt: Chronology, Palynology and Palaeoenvironments
… through high resolution 813C, 81SN and pollen analysis, with the aid of principal component analysis. Bulk organic radiocarbon dating of the surface sediment had previously yielded older than expected ages. New 210Pb analysis has established that these surface sediments are modem and …
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An Archaeobotanical Contribution to Foodways, Wood Collecting Strategies, and Niche Construction at the Late and Terminal Archaic Site of Côte Rouge in Southern Québec
… and favor mobility over trash relocation, the analysis focused on the hearths and their close periphery. The cooking techniques recognized include pit roasting, hot rock boiling and direct cooking on rock griddles. The wood charcoal assemblages did not reveal a correlation between the types of …
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