DOI: 10.1016/j.palaeo.2014.05.001
论文题名: A statistical sub-sampling tool for extracting vegetation community and diversity information from pollen assemblage data
作者: Keen H.F. ; Gosling W.D. ; Hanke F. ; Miller C.S. ; Montoya E. ; Valencia B.G. ; Williams J.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 408 起始页码: 48
结束页码: 59
语种: 英语
英文关键词: Count size
; Evenness
; Palynology
; Richness
; Sub-sampling
; Tropical
英文摘要: Pollen assemblages are used extensively across the globe, providing information on various characteristics of the vegetation communities that originally produced them, and how these vary temporally and spatially. However, anticipating a statistically based robust pollen count size, sufficient to characterise a pollen assemblage is difficult; particularly with regard to highly diverse pollen assemblages. To facilitate extraction of ecologically meaningful information from pollen assemblage data, a two part statistical sub-sampling tool has been developed (Models 1 and 2), which determines the pollen count size required to capture major vegetation communities of varying palynological richness and evenness, and the count size required to find the next not yet seen (rare) pollen taxa. The sub-sampling tool presented here facilitates the rapid assessment of individual pollen samples (initial information input of 100 pollen grains) and can, therefore, on a sample by sample basis achieve maximum effectiveness and efficiency. The sub-sampling tool is tested on fossil pollen data from five tropical sites.Results demonstrate that Model 1 predicts count sizes relating to palynological richness and evenness consistently. To characterise major vegetation community components model 1 indicates that, for samples with a lower richness and higher evenness lower count sizes than are considered standard can be used (<. 300, e.g. 122); however, for samples of high richness and low evenness, higher count sizes are required (>. 300, e.g. 870). Model 2 calculates the additional number of pollen grains needed to be counted to detect the next not yet seen pollen taxa, outputs were strongly related to input data count size as well as richness and evenness characteristics. We conclude that, given the temporal and spatial variations in vegetation communities and also pollen assemblages, pollen count sizes should be determined for each individual sample to ensure that effective and efficient data are generated and that detection of rare taxa is checked iteratively throughout the counting process. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69304
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Environment, Earth and Ecosystems, Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR), The Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom; Accelrys, 334 Cambridge Science Park, Cambridge CB4 0WN, United Kingdom; Department of Biology, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901, United States; Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, Ceredigion SY23 2DB, United Kingdom
Recommended Citation:
Keen H.F.,Gosling W.D.,Hanke F.,et al. A statistical sub-sampling tool for extracting vegetation community and diversity information from pollen assemblage data[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,408