广东八宝山森林群落优势种群的生态位研究

STUDIES ON THE MCHE BREADTH AND OVERLAP OFDOMINANT POPULATIONS IN THE FOREST COMMUMTIES OF BABAOSHAN,GUANGDONG

研究了广东八宝山森林群落２５个优势种群的生态位特征．以Ｓｈａｎｎｏｎ－Ｗｉｅｎｅｒ指数和相似性比例分别计算了２５个种群的生态位宽度及它们之间所形成的部分种对的生态位重叠。结果表明，八宝山森林群落中生态位宽度最大的种群为红背锥、米锥、硬斗稠以及木荷。生态位宽度的大小与按重要值排列的优势种群顺序基本一致。生态位重叠则与生态位宽度有一定关系，具较宽生态位的２个种群一般都有着较高的生态位重叠值。文章还对生态位特征研究的意义及应用作了简要的说明。

Niche characteristics o f 25 dominant populations in the forest communities o fBa baoshan,Guangdong,were studied by computing their niche breadth value andniche overiap value.The result showed that,among the dominant populations,Castano psisfargesii,C.cariesii,Lithocamus hancei and Schima superba had the highestniche breadth value,and the descending order of niche breadth was to some extent inaccordanee with the IV(Importance Value)sequence of the po pulations.Niche o verla pwas closely related to niche breadth Two populations with wide niche breadths usual-ly had a higher niche overlap value than those with narrow niche breadths o r whenone population had wide niche breadth and the other narrow niche breadth.Finally,the paper gives brief remarks on the niche studies and its application to forestrymanagement and silviculture.