从种间联结分析濒危植物毛柄小勾儿茶在群落中的地位  

COMMUNITY STUDIES ON THE STATUS OF THE ENDANGERED PLANT, BERCHEMIELLA WILSONII VAR. PUBIPETIOLATA, USING INTERSPECIFIC ASSOCIATION ANALYSIS

作　　者：胡理乐[1] 江明喜[1] 党海山[1] 黄汉东[1] 

机构地区：[1]中国科学院武汉植物园,武汉430074

出　　处：《植物生态学报》2005年第2期258-265,共8页Chinese Journal of Plant Ecology

基　　金：中国科学院知识创新工程重要方向性项目 (KSCX2_SW_10 4)

摘　　要：毛柄小勾儿茶 (Berchemiellawilsoniivar.pubipetiolata)为我国分布于浙江、安徽局部地区的特有珍稀物种 ,由于自身和人为干扰的原因 ,该种受到灭绝威胁。该文在 2× 2联列表基础上 ,应用 χ2 检验、联结系数 (AC)分别检测了毛柄小勾儿茶在 4个分布点与群落中乔、灌两层植物的种间联结性。综合比较 χ2 检验与AC值的测定结果 ,在 4个分布点 ,毛柄小勾儿茶与群落中其它种群的关联情况十分相似 :1)绝大多数种群与毛柄小勾儿茶的AC值在 - 0 .2至 0 .2之间 ,即无关联 ;2 )与毛柄小勾儿茶存在显著关联的种群仅有一个或无 ;3)优势种群与毛柄小勾儿茶关联小。这说明 4个分布点毛柄小勾儿茶在群落中都具有很大的独立性或随机性 ,它只是群落的伴生种或偶见种。研究结果对为该物种制定合适的就地保护措施和恢复计划具有参考价值。Berchemiella wilsonii var. pubipetiolata is a local endemic species distributed discontinuously throughout the Mt. Dabieshan region of the Anhui Province and Mt. Qingliangfeng region of Zhejiang Province, eastern China. Because of the human impacts on natural ecosystems, it is under the threat of extinction and has been ranked as an endangered species. In this study, we assessed the community status of B. wilsonii var. pubipetiolata as a basis for its conservation. Based on 2×2 contingency tables, the interspecific correlation of B. wilsonii var. pubipetiolata in the tree layers and shrub layers with other species analyzed in four different communities were studied by using χ 2 tests and association coefficients (AC). The results indicated that the interspecific correlations of B. wilsonii var. pubipetiolata to other species were very similar in each of the four sites. The value of AC between most species and B. wilsonii var. pubipetiolata ranged from -0.2 to 0.2, which indicated that there was no relationship between B. wilsonii var. pubipetiolata and other species. The χ 2 analysis indicated that either no species or only one species in a community had a significant relationship with B. wilsonii var. pubipetiolata. There were no significant relationships between the dominant species and B. wilsonii var. pubipetiolata in any of the communities. All of the above results imply that B. wilsonii var. pubipetiolata was distributed independently or had random occurrence in the different communitiesindicating that it is an incidental or rare species. This case study highlights the importance of having a good understanding of the ecological characteristics of uncommon plants as a basis for making decisions regarding their conservation.

关 键 词：种间联结 濒危植物 毛柄小勾儿茶 群落 就地保护 

分 类 号：Q948[生物学—植物学]