Calibrating vegetation cover and pollen assemblages in the Flint Hills of Kansas, U.S.A.

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Show simple item record Commerford, Julie L. 2010-05-17T18:37:31Z 2010-05-17T18:37:31Z 2010-05-17T18:37:31Z
dc.description.abstract The quantitative relationship between pollen assemblages in sediment and vegetation cover is largely unknown because many factors influence this relationship. This lack of quantitative relationship is particularly acute in grassland regions, where both past and future climate change have the potential to determine grassland composition and cover. The tool used to reconstruct past grassland cover is the relative abundance of distinct fossil pollen types preserved in sediment. However, the interpretation of grassland pollen assemblages as grassland vegetation types needs to be refined to improve these reconstructions. Using pollen found in the surface sediments from 24 artificially-constructed ponds in the Flint Hills ecoregion of Kansas, USA, I examined relationships between pollen and vegetation in the tallgrass prairie biome, which includes woody components. By comparing the pollen data to field-surveyed vegetation data and land cover classifications taken from Kansas Gap Analysis Program data, I correlated pollen and vegetation in this ecoregion. Pollen productivity estimates for Artemisia, Ambrosia, Asteraceae, Chenopodiaceae, Cornus, Fabaceae, Juniperus, Maclura, Poaceae, Populus, Quercus, and Salix were calculated via the Extended R-Value Model. Common pollen types identified in sediments are mostly herbaceous grassland plant species such as Poaceae, Artemisia, and Ambrosia, but woody plants such as Populus, Quercus, and Juniperus are also represented. PPEs have been calculated for four of these taxa in Europe, and values from the Flint Hills are higher. These are the first PPEs reported for eight of these taxa. This research will further advance quantitative vegetation reconstructions in the Great Plains of North America and refine interpretations of how climate change affects grasslands. en_US
dc.description.sponsorship National Science Foundation en_US
dc.language.iso en_US en_US
dc.publisher Kansas State University en
dc.subject Kansas- Flint Hills en_US
dc.subject pollen en_US
dc.subject prairie vegetation en_US
dc.subject grassland en_US
dc.title Calibrating vegetation cover and pollen assemblages in the Flint Hills of Kansas, U.S.A. en_US
dc.type Thesis en_US Master of Arts en_US
dc.description.level Masters en_US
dc.description.department Department of Geography en_US
dc.description.advisor Kendra K. McLauchlan en_US
dc.subject.umi Geography (0366) en_US
dc.subject.umi Paleoecology (0426) en_US 2010 en_US August en_US

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