Pollen and non-pollen palynomorph analyses of Upper Holocene sediments from Dianshan, Yangtze coastal lowlands, China: Hydrology, vegetation history and human activity
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چکیده
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Holocene Biogeochemical and Pollen History of a Lake Erie , Ohio , Coastal Wetland
A five meter sediment core was taken from Old Woman Creek National Estuarine Research Reserve and State Natural Area and Preserve along the western basin of Lake Erie, U.S.A., to determine the historical biogeochemistry of the wetland. Analysis of pollen and sediment chemistry revealed that the area has remained a wetland since ca. 5,500 yr BP, despite changing lake levels. Pollen stratigraphy ...
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The main goal of this study was to investigate how climate and human activities may have influenced ecotonal areas of disjoint savannas within Brazilian Amazonia. The fossil pollen and charcoal records of Lake Márcio (Amapá) were used to provide a Holocene palaeoecological history of this region. Detrended correspondence analysis (DCA) was used to enhance the patterns of sample distribution alo...
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Pollen, charcoal, and C14 analyses were performed on a sediment core obtained from Lake Tapera (Amapá) to provide the palaeoenvironmental history of this part of Amazonia. A multivariate analysis technique, Detrended Correspondence Analysis, was applied to the pollen data to improve visualization of sample distribution and similarity. A sedimentary hiatus lasting 5,500 years was identified in t...
متن کاملLate-glacial and Holocene European pollen data
The European Pollen Database (EPD) is a community effort to archive and make available pollen sequences from across the European continent. Pollen sequences provide records that may be used to infer past vegetation and vegetation change. We present here maps based on 828 sites from the EPD giving an overview of changes in postglacial pollen assemblages in Europe over the past 15,000 years. The ...
متن کاملNew England Note Comparison of Pollen and Stomata in Late-glacial and Early-holocene Lake Sediments from Eastern Massachusetts
The analysis of stomata in lake-sediment cores is increasingly used as a paleoecological tool. Stomata are less likely than pollen grains to be dispersed over long distances, and thus stomate records supplement and enhance interpretations based on pollen data by providing information about patterns and composition of local vegetation (e.g., Froyd 2005; Hansen 1995; Parshall 1999; Pisaric et al....
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ژورنال
عنوان ژورنال: Palaeogeography, Palaeoclimatology, Palaeoecology
سال: 2019
ISSN: 0031-0182
DOI: 10.1016/j.palaeo.2019.03.009