THE SHAPE FACTORS OF PHYTOLITH IN SELECTED PLANTS FROM CHANGBAI MOUNTAINS AND THEIR IMPLICATIONS
Phytolith as a climate proxy is one of the most important and effective tool for reconstruction of paleoenvironment.Thus it's very significant to research further how to distinguish between phytoliths for accurately reconstructing paleoenvironment.In this paper,10 species plants(Miscanthus sacchariflorus,Echinochloa phyllopogon,Echinochloa var.caudata,Arthraxon hispidus,Calamagrostis angustifolia,Calamagrostis langsdorffii,Beckmannia syzigachne,Millium effusum,Calamagrostis arundinacea,Phragmites communis)are selected and 3037 phytoliths are identified.7 shape factors of Bilobate,Elongate,Lanceolate,Crenate,Saddle and Stomata are measured and analyzed by nonparametric testing and discriminant analysis.Results are following:The result of the nonparametric testing indicates that average value of the SF4 among the 3 subfamilies is obviously different.Discriminant functions for the 3 subfamilies,also reveal that the discriminant accuracy is high (88.51％).Total discriminant accuracy for Panicoideae is 73.12％.Discriminant accuracies for Pooideae are respectively 60.87％,59.21％,and 87.07％ based on shape factors of the Elongate,Lanceolate and Crenate phytoliths.At the same time,Leymus chinensis and Setaria viridis are used to test whether the discriminant functions are effective or not.Result shows discriminant functions classify precisely them,thus verify discriminant functions are useful.In a word,the shape factors not only may improve the accuracy of plant classification,but also provide a new profile for the plant classification.
NETL
NSTL
万方数据
维普
