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• 研究报告 • 上一篇    下一篇

珍稀濒危植物金花茶的点格局分析

黄明钗1,4,史艳财2,韦霄2**,吴林芳1,吴儒华3,潘子平3,曹洪麟1   

  1. (1中国科学院华南植物园, 广州 510650; 2广西壮族自治区中国科学院广西植物研究所, 广西桂林 541006; 3广西防城金花茶国家级自然保护区管理处, 广西防城港 5380212; 4中国科学院大学, 北京 100049)
  • 出版日期:2013-05-10 发布日期:2013-05-10

Point pattern analysis of rare and endangered plant Camellia nitidissima Chi.

HUANG Ming-chai1,4, SHI Yan-cai2, WEI Xiao2**, WU Lin-fang1, WU Ru-hua3, PAN Zi-ping3, CAO Hong-lin1   

  1. (1South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; 2Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China; 3Guangxi Fangcheng Management Division of Yellow Camellia National Nature Reserve, Fangcheng 538021, Guangxi, China; 4University of Chinese Academy of Sciences, Beijing 100049, China)
  • Online:2013-05-10 Published:2013-05-10

摘要: 金花茶(Camellia nitidissima Chi)是一种珍稀濒危的观赏植物,为林下常绿灌木或小乔木,分布区非常狭小。基于广西防城金花茶自然保护区1 hm2次生林固定样地的调查数据,采用单变量和双变量成对相关函数分析了金花茶的空间分布格局及其与样地25个主要树种之间的空间关联性。结果表明:金花茶种群径级结构呈现倒“J”型分布,有小径级个体储备,种群较稳定;金花茶在空间上呈聚集分布,随着尺度的增大,聚集强度逐渐减小;金花茶对资源的利用和生境的适应性与群落中的其他主要树种差异较大;金花茶与样地25个主要树种之间的空间关联性达88%,其中与金花茶呈负相关的树种占60%,明显多于呈正相关的树种;25个主要树种中的6个群落中上层物种,在空间格局上与金花茶呈显著性正相关,恰好为金花茶的生存创造了适宜的林下环境。

关键词: 轮作模式, 稻季, 温室气体, 全球增温潜势, 紫云英

Abstract: Camellia nitidissima Chi, an evergreen understory shrub or sub-tree, is a rare and endangered ornamental species, and its distribution is very narrow. Based on the investigation data from a 1 hm2 secondary forest plot in the Fangcheng National Reserve of Guangxi, South China, and by using uni- and bivariate analyses of paired correlation function g(r), this paper studied the distribution pattern of C. nitidissima and its spatial association with dominant species. The size distribution of the C. nitidissima population showed an invert J-shape, indicating that the C. nitidissima population was in a stable and normal growth status. C. nitidissima was significantly aggregated at scales <25 m, and the aggregation intensity weakened with the increase of scale. C. nitidissima showed a significant spatial correlation with most of the other main tree species (accounting for 88%) on different scales, which was stronger than the spatial correlations between the top five trees and the 25 main trees in the plot. What’s more, the significant negative correlations between C. nitidissima and the main tree species accounted for 60%, which were obviously greater than the significant positive correlations, indicating that the way the C. nitidissima utilized resources was different from the majority trees in the plot. Six main species which located in the middle and upper layers of the community showed significant positive correlations with C. nitidissima, implying that they created suitable understory environment for the survival of C. nitidissima.

Key words: rotation system, rice season, greenhouse gas, global warming potential, Chinese milk vetch.