古田山青冈林优势种群生态位特征  

Niche characteristics of dominant populations in Cyclobalanopsis glauca forest in Gutian Mountain

作　　者：胡正华[1] 于明坚[2] 

机构地区：[1]南京信息工程大学环境科学系,南京210044 [2]浙江大学生命科学学院,杭州310028

出　　处：《生态学杂志》2005年第10期1159-1162,共4页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(30200034);浙江省自然科学基金项目(301026);南京信息工程大学科研基金资助项目(Y410)。

摘　　要：利用样方法进行野外调查,每个样地大小20 m×20 m。采用生态位宽度、生态位相似比例和生态位重叠值公式统计分析了古田山自然保护区青冈林优势种群生态位特征。结果表明,古田山青冈林中青冈、马银花、木荷、甜槠、麂角杜鹃等具有较大的生态位宽度,其Bi、Ba分别为0.7974、0.6435、0.6272、0.5908、0.5783和0.7770、0.4012、0.4745、0.4171、0.4303;而光叶石楠和栲树的生态位宽度较小,Bi、Ba仅为0.3966、0.2716和0.1441、0.0825。生态位宽度大的种群间生态位相似比例较高,如青冈与马银花、麂角杜鹃的生态位相似比分别为0.6134、0.6056;反之则低,如光叶石楠和栲树生态位相似比为0.1039。生态位重叠与生态位宽度有一定的联系,高生态位宽度种群间的生态位重叠通常较大,反之则低。Employing sampling method, this paper studied the niche breadth, similarity and overlap of the dominant populations in Cyclobalanopsis glauca forest in Gutian Mountain Nature Reserve. The results showed that the niche breadths of C. glauca, Rhododendron ovatum, Schima superba, Castanopsis eyrei and R. latoucheae were much greater, with the Levins and Hurlbert＇s niche breadths 0. 7974, 0. 6435,0. 6272, 0. 5908, 0. 5783 and 0. 7770, 0. 4012, 0. 4745, 0. 4171,0. 4303, respectively, While those of Photinia glabra and Caslanopsis fargesii were smaller, with the Levins and Hurlbert＇ s niche breadths 0. 3966, 0. 2716 and 0. 1441, 0. 0825, respectively. The niche similarity between the species with broad niche breadths was greater than that between the species with narrow niche breadths, e. g., it was 0. 6134 and 0. 6056 between C. glauca and R. ovatum, and C. glauca and R. latoucheae, respectively, but was 0.1039 between Photinia glabra and Caslanopsis fargesii. Similar trend was observed for the niche overlaps.

关 键 词：青冈林 优势种群 生态位宽度 生态位相似性比例 生态位重叠 古田山 

分 类 号：S718.5[农业科学—林学]