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林业科学 ›› 2017, Vol. 53 ›› Issue (9): 105-113.doi: 10.11707/j.1001-7488.20170913

• 研究简报 • 上一篇    下一篇

热带海岸香蒲桃天然次生林群落优势种群种间联结性

杨青青2, 杨众养2, 陈小花2, 余雪标1, 薛杨2, 王小燕2   

  1. 1. 海南大学热带农林学院 海口 570228;
    2. 海南省林业科学研究所 海口 571100
  • 收稿日期:2016-04-10 修回日期:2017-08-17 出版日期:2017-09-25 发布日期:2017-10-24
  • 基金资助:
    海南省属科研院所技术开发专项"文昌市沿海次生林生态恢复技术研究"(NO.kyys-2016-24)。

Interspecific Associations of Dominant Plant Populations in Secondary Forest of Syzygium odoratum in Tropical Coast

Yang Qingqing2, Yang Zhongyang2, Chen Xiaohua2, Yu Xuebiao1, Xue Yang2, Wang Xiaoyan2   

  1. 1. Institute of Tropical Agriculture and Forestry, Hainan University Haikou 570228;
    2. Hainan Forestry Research Institute Haikou 571100
  • Received:2016-04-10 Revised:2017-08-17 Online:2017-09-25 Published:2017-10-24

摘要: [目的]研究热带海岸香蒲桃天然次生林群落乔木层、灌木层、草本层各优势种群的种间关联性,以期阐明群落演替与种对间关联性的内在规律,为海岸香蒲桃天然次生林的保护、恢复与重建提供理论依据。[方法]选取海南文昌热带海岸典型香蒲桃天然次生林群落,采用方差比率法测定乔木层、灌木层、草本层优势种群的总体关联性,使用χ2检验2个种群关联与否,进一步用Ochiai指数来表征关联程度。[结果]乔木层的总体关联性表现出不显著正关联,正关联种对数为54对,负关联种对数为49对,无关联种对数为17对,分别占总对数的45.0%,40.8%和14.2%;香蒲桃与群落中其他乔木树种无关联,具有较强的独立性;灌木层负关联种对数有33对,占总对数的43.6%,这些负关联的树种多以阳性植物组成为主;竹叶木姜子和九节易与其他物种形成正关联种对,亦是灌木层互利共生的主要树种;草本层的总体关联性为显著负关联(P<0.05),正关联种对数较少(12%),负关联种对数比例较高(78%),群落处于不稳定状态,容易受外界干扰而演替;海金沙和铺地黍这2物种在草本层中互利共生。[结论]热带海岸香蒲桃天然次生林群落优势种群种对间种间关联明显,物种之间存在一定的独立性,整体趋向稳定发展。实践中为加快热带海岸次生林演替进程,应以正联结性较强的树种对(山楝-黄槿、竹叶木姜子-九节、东风桔-露兜树)作为海防林的造林树种。

关键词: 热带海岸, 种间联结, 方差比率法, 优势种群, 次生林, 香蒲桃

Abstract: [Objective] Interspecific associations of dominant plant populations respectively in the layers of tree, shrub and herb in communities of secondary natural forest of Syzygium odoratum in tropical coast were studied to reveal the inherent linkages of interactions among different populations during the process of community development, and to clarify the natural rules of community development in relation to the succession and interspecific association, as well as to provide a theoretical basis for the recovery of coastal forests in China.[Method] Typical communities of secondary natural forest of S. odoratum in Hainan Island were selected for the study. 2×2 contingency tables of species presence/absence data were used as the basis for the analysis of overall interspecific associations among dominant plant populations in different layers of tree, shrub and herb by using the variance ratio method.χ2 test and Ochiai index were used to characterize interspecific associations.[Results] Interspecific association in the tree layer was not significantly positive. For the 171 tree species, although there were collocation at some degrees, but a stable and harmonious collocation was not found. S. odoratum was not associated with other tree species. It was strongly independent. The inter-specific association of Casuarina equisetifolia and Pittosporum tobira were in significant positive correlation. The shrub layer displayed significant positive correlation in the inter-specific association (P<0.05). Compared with the tree layer, inter-specific association in the herb layer was strongly negative.[Conclusion] In the tropical coastal forest community, dominant species of displayed significant interspecific association and there existed a certain degree of independence between species and overall trend of stable development. In order to speed up the process of succession of the tropical coast secondary forest, the species with strong coupling should be protected in practice.

Key words: tropical coast, interspecific association, variance ratio, dominant population, secondary forest, Syzygium odoratum

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