建始县高岩子林场优势乔木生态位特征

Niche Characteristics of Dominant Arbors in Gaoyanzi Forest Farm in Jianshi County

摘要:

摘要：了解乔木的生态位，为可持续经营和保护天然林提供依据。本研究利用Levins公式和Pianka公式测定高岩子林场7种优势乔木的生态位宽度和生态位重叠。生态位宽度的大小依次是日本落叶松、四照花、柳杉、青冈、木姜子、云锦杜鹃和珙桐，生态位重叠较大。建始县国有高岩子林场乔木生态位颇具特色，在森林资源开发中要互补利用。

Abstract:

Abstracts:The knowledge of arbor niche can provide basis for sustainable management and protection of natural forests. Using formulas of Pianka and Levins,in the study, we determined niche breadth and niche overlap of seven kinds of dominant arbor in Gaoyanzi forest farm. Niche width decreased in the order of Larix keampferi, Dendrobenthamia japonica var. chinensis Cryptomeria fortunei，Cyclobalanopsis glauca，Litsea cubeba，Rhododendron fortunei and Davidia involucrata，while the niche overlap increased. Arbor niche overlap had unique characteristics in Jianshi County state owned Gaoyanzi forest farm,and they should be complementary in the development of forest resources.