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南京方山国家地质公园朴树群落特征(PDF)

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2013年01期
页码:
58
栏目:
植物生态与生物地理学
出版日期:
2013-01-25

文章信息/Info

Title:
Community character of Celtis sinensis of Fangshan National Geological Park in Nanjing
作者:
金雅琴1 曹雪方2 孙晓龙1 刘儒1
1.金陵科技学院 园艺学院, 南京 210038; 2.江苏教育学院生命科学与化学学院, 南京 210013
Author(s):
JIN YaQin1 CAO XueFang2 SUN XiaoLong1 LIU Ru1
1.College of Horticulture, Jinling Institute of Technology, Nanjing 210038, China; 2.College of Life Sciences and Chemistry, Jiangsu Institute of Education, Nanjing 210013, China
关键词:
方山 朴树 群落特征 种群结构 分布格局
Keywords:
Fangshan Celtis sinensis community character population structure distribution pattern
分类号:
Q948.1
DOI:
10.3969/j.issn.1000-3142.2013.01.009
文献标识码:
A
摘要:
采用样地调查法对南京方山国家地质公园朴树群落特征进行研究。结果表明:(1)群落中朴树的优势地位突出,其重要值为44.481%,是该群落的第1优势种;主要伴生树种有构树、茅栗、榉树、麻栎、榔榆、刺槐等;群落成层现象明显,可分为乔木层、灌木层(含下木层)和草本层,但地被层不发达;(2)群落垂直结构较为简单,乔木层共有木本植物15种。乔木层丰富度指数(S)、ShannonWiener指数(H′)、Simpson指数(D)、种间相遇机率(PIE)、Pielou均匀度指数(J)分别为7.429、1.406、0.696、0.054、0.723,物种多样性总体偏低;(3)朴树种群年龄结构表现为Ⅰ、Ⅱ级幼苗普遍较少,幼苗贮备严重不足,种群自身更新不良,整体处于衰退之中;(4)采用扩散系数(C)、负二项参数(K)、扩散型指数(Iδ)、Cassie指标(Ca)、丛生指标(I)、平均拥挤度指数(m*)和聚块性指标(m*/m)进行分析,朴树种群的空间分布格局均为集群分布,但不同样地中的种群集聚程度因生境的变化而存在一定差异。
Abstract:
The community character of Celtis sinensis of Fangshan National Geological Park in Nanjing was studied using quadrat survey. The results were as followed:(1)the dominant species of the community was C.sinensis,of which the important value was 44.481%,and there were Broussonetia papyrifera,Castanea seguinii,Zelkova serrata,Quercus acutissima,Ulmus parvifolia and Robinia pseudoacacia in upper layer as main companion tree species; (2)the population structure was simple and there were 15 arborous species at upper layer,and the species diversity indexes of the tree layer were a bit low by analyzed five indices,species richness(S),ShannonWiener index(H′),Simpson index(D),PIE index,Pielou evenness index(J),and these indexes were 7.429,1.406,0.696,0.054,0.723 by calculation; (3)the diameter class structure of C.sinensis population showed the seedlings numbers of class Ⅰ and Ⅱ were less,so that the young seedlings reservoir was not seriously enough. The ability of selfrenewing of the population was bad,so they tended to atrophy quantitatively and were in the decline; (4)the spatial pattern of seven sampling plots were aggregative distribution through testing clusterintensity coefficient for instance Kvalue of negative binomial,dispersal index(C),index of dispersion pattern(Iδ),Cassie index(Ca),clumping index(I),index of mean crowding(m*)and index of patchiness(m*/m),but there were certain difference among seven sampling quadrats in their aggregative degree.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2013-01-25