赤皮青冈天然林优势种群间关系及生态种组划分

doi:10.16036/j.issn.1000-2650.2020.02.002

摘要/Abstract

摘要： 【目的】揭示赤皮青冈天然林的种间关系、群落结构特征及演替趋势,为更好地保护该群落的资源提供科学依据。【方法】通过样方调查,采用2×2联列表,5种种间关联系数和聚类分析等方法。选取赤皮青冈群落中重要值（IV）排前25的优势种,将其构成的300个种进行种间关联性测定、分析及划分生态种组。【结果】赤皮青冈天然林中赤皮青冈（Cyclobalanopsis gilva）的重要值居首位,值为131.2%,属于建群种;钩栲（Castanopsis tibetana）次之,值为35.2%,茶竿竹（Pseudosasa amabilis）和毛竹（Phyllostachys heterocycla）分别排在第3和第4,值分别为26.7%和22.9%;该群落大部分种对种间联结性呈现弱联结状态,甚至是无联结状态,说明该种群的分布相对独立,结合聚类分析以及各物种的生态习性进行综合分析,将重要值前25个优势种群划分为3个生态种组,第1生态种组只有赤皮青冈,第2生态种组由茶秆竹、甜槠（Castanopsis eyrei）、钩栲和毛竹组成,第3生态种组由剩下的物种组成。赤皮青冈天然林整体结构趋于稳定,群落向顶级方向演替。【结论】赤皮青冈天然林中呈现无联结性、弱联结性、甚至负联结性的种对所占的比例较高,群落向顶级方向演替,说明该群落具有较为稳定的森林生态系统。通过划分生态种组,发现该生态种组的优势种群的物种对其生境要求较高,有助于对赤皮青冈天然林的生物多样性进行保育,对营造赤皮青冈近自然林提供更准确的物种搭配,改善群落物种种间关系。

关键词: 赤皮青冈, 生态种组, 种间联结, 聚类分析

Abstract: 【Objective】 The objective of the study was to reveal the interspecific relationships, community structure characteristics and succession trends of Cyclobalanopsis gilva natural forests, which will provide a scientific basis for better protection of the community's resources. 【Method】 five interspecific correlation coefficients and cluster analysis based on the 2×2 contingency tables of specific presence data. The dominant species of the top 25 important values (IV) in the C. gilva community were selected, and the 300 species pairs formed by the species were interspecies. Correlation, analysis and classification of ecological species. 【Result】 The results showed that the important value of C. gilva was 131.2%, belonging to the constructive species; Castanopsis tibetana was followed by 35.2%, Pseudosasa amabilis and Phyllostachys heterocycla were ranked third and fourth respectively (26.7% and 22.9%); most of the community showed weak linkage status, even no connection status, indicating that the distribution of the population was relatively independent, combined with cluster analysis and ecological habits of various species for comprehensive analysis. The analysis of the top 25 dominant populations of important values into three ecological species groups, the first ecological species group is only C. gilva, the second ecological species group consisted of P. amabilis, Castanopsis eyrei, C. tibetana and P. heterocycla, the third ecological species the group consisted of the remaining species. The overall structure of the C. gilva natural forest tends to be stable, and the community is succeeding in the top direction. 【Conclusion】 The natural forests of C. gilva present a high proportion of species pairs with no connection, weak connection, or even negative connection, and the community succeeds in the top direction, indicating that the community has a relatively stable forest ecosystem. By dividing the ecological species group, it is found that the species of the dominant species in this ecological group has higher habitat requirements, which helps to conserve the biodiversity of the natural forest of C. gilva, and provides more accuracy for the construction of near-natural forest of C. gilva matching to improve interspecies relationships among community species.

Key words: Cyclobalanopsis gilva, ecological species groups, interspecific association, cluster analysis

中图分类号:

S718.5

谢健. 赤皮青冈天然林优势种群间关系及生态种组划分[J]. 四川农业大学学报, 2020, 38(02): 127-134.

XIE Jian. Interspecific Relationships and Ecological Species Division of Dominant Populations of Natural Forest in Cyclobalanopsis gilva[J]. Journal of Sichuan Agricultural University, 2020, 38(02): 127-134.

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