globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.01.012
论文题名:
Statistically assessing the correlation between salinity and morphology in cysts produced by the dinoflagellate Protoceratium reticulatum from surface sediments of the North Atlantic Ocean, Mediterranean-Marmara-Black Sea region, and Baltic-Kattegat-Skagerrak estuarine system
作者: Jansson I.-M.; Mertens K.N.; Head M.J.; de Vernal A.; Londeix L.; Marret F.; Matthiessen J.; Sangiorgi F.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 399
起始页码: 202
结束页码: 213
语种: 英语
英文关键词: Collinearity ; Hierarchical partitioning ; Model development ; North Atlantic ; Operculodinium centrocarpum
英文摘要: Recent studies have correlated dinoflagellate resting cyst morphology to salinity and density variations in the water column, suggesting that morphology can be used for paleoceanographic reconstructions. However, the univariate statistics used by these studies are appropriate only where morphology is related to a single variable. Density is a function of salinity and temperature, so more advanced statistical methods are needed to understand which parameters affect morphology. In this study based on surface (coretop) sediments, a set of environmental variables (sea-surface salinity, temperature, nitrate, and phosphate) was simultaneously correlated to morphological variations seen in resting cysts produced by the dinoflagellate Protoceratium reticulatum (=Operculodinium centrocarpum sensu Wall and Dale). Approximately 3200 measurements were obtained from the North Atlantic Ocean and used to generate a working model based on the Akaike information criterion. Hierarchical partitioning was then applied to establish the independent and joint effects for each predictor variable. Results from these analyses showed that while salinity constitutes the dominant variable affecting process length in the cysts of P. reticulatum in the North Atlantic, it is not the sole explanatory variable and that multicollinearity exists. Temperature and nutrients also showed a significant relationship to the morphology, requiring multiple regression to construct a representative model. The applicability of the North Atlantic working model was finally evaluated by comparing the results to data from the Mediterranean, Marmara, and Black seas, and Baltic-Kattegat-Skagerrak estuarine system. This comparison showed regional differences in morphological-environmental correlation. While salinity constitutes the most important explanatory factor in both the North Atlantic and Baltic-Skagerrak system, this is not so for the Mediterranean-Black Sea region where temperature is the dominant variable. It is concluded that a predictive salinity model based on P. reticulatum cyst morphology has at best a regional application. © 2014 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69419
Appears in Collections:过去全球变化的重建

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作者单位: Department of Earth Sciences, Earth Sciences Centre, University of Toronto, 22 Russell St., Toronto, Ontario M5S 3B1, Canada; Research Unit for Palaeontology, Ghent University, Krijgslaan 281 S8, 9000 Ghent, Belgium; Department of Earth Sciences, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada; GEOTOP, Université du Québec à Montréal, P.O. Box 8888, Montréal, Québec H3C 3P8, Canada; Département de Géologie et Océanographie, UMR 5805 CNRS, Université Bordeaux 1, Avenue de Facultés, 33405 Talence cedex, France; School of Environmental Sciences, University of Liverpool, Liverpool L69 7ZT, United Kingdom; Alfred Wegener Institute for Polar and Marine Research (AWI), 27515 Bremerhaven, Germany; Department of Earth Science, Faculty of Geosciences, Laboratory of Palaeobotany and Palynology, Budapestlaan 4, 3584 CD Utrecht, Netherlands

Recommended Citation:
Jansson I.-M.,Mertens K.N.,Head M.J.,et al. Statistically assessing the correlation between salinity and morphology in cysts produced by the dinoflagellate Protoceratium reticulatum from surface sediments of the North Atlantic Ocean, Mediterranean-Marmara-Black Sea region, and Baltic-Kattegat-Skagerrak estuarine system[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,399
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