摘要
应用王刚提出的生态位重叠值公式,计测了丽水白云山国家森林公园39个样方54种主要木本植物的生态位重叠值。以此为指标,分别应用主坐标排序(Principalaxesanalysis,PAA)、最小生成树法(Minimalspanningtree,MST),作出了反映54种木本植物种间生态关系的二维投影图和最小生成树,发现马尾松、木荷、木、甜槠、马银花、苦槠、短柄、锥栗和乌药之间,山苍子、栗、蓝果树、大青、山樱桃和南方红豆杉之间有较高的生态相似性。按修正后的Levins公式,计算了54种木本植物的生态位宽度。根据生态位宽度,将54种木本植物分成5类,其中马尾松、木、木荷、锥栗、甜槠、格药柃具有较宽的生态位。统计表明,白云山地区木本植物生态位宽度(B)与种数(N)符合公式:N=18.333e-4.4109B,R2=0.9467,α<0.01,随着生态位宽度的增加,植物种数呈指数下降。
The niche overlaps of 54 main woody species in 39 sites in Baiyun Mountain of Lishui, Zhejiang Province were calculated by Wang's equation, twodimensional scatter plot of principal axes analysis and the minimal spanning tree on the basis of niche overlaps were drawn. Both the ordination plot and the minimal spanning tree revealed higher ecological similiarities among Pinus massoniana, Schima superba, Loropetalum chinensis, Castanopsis eyrei, Rhododendron ovatum,Castanopsis sclerophylla, Quercus glandulifera var. brevipetiolata, Castanea henryi and Lindera aggregata and those among Litsea cubeba, Castaneia mollissima,Nyssa sinensis,Clerodendrum cyrtophyllum,Prunus serrulata var. pubescens and Taxus mairei. The niche width of the 54 woody species was also calculated by the modified equation put forward by Levins. The 54 woody species could be divided into five ecological groups according to their niche widths. It was found that Pinus massoniana, Loropetalum chinensis, Schima superba, Castanea henryi, Castanopsis eyrei, and Eurya muricata had wider niche breadth.The relationship between niche width (B) with the number of the woody species (N) could be described by N=18.333 e-4.4109 B, R2=0.9467,α<001), indicating that the number of woody species decline exponentially with the breadth of the niche in Baiyun Mountains.
出处
《武汉植物学研究》
CAS
CSCD
2003年第4期339-345,共7页
Journal of Wuhan Botanical Research
基金
丽水学院重点科研项目基金资助。
关键词
木本植物
丽水
白云山
生态位
Woody plants
Lishui
Baiyun Mountain
Niche
