干扰状态下闽楠林乔木层主要种群种间联结性的研究

Interspecific association of dominant tree populations in Phoebe bournei forest with disturbance

    摘要
  • 摘要: 基于2×2联列表，以χ2检验为基础，结合共同出现百分率JI、联结系数AC以及点相关系数PCC，测定了福建省政和县东平镇凤头村受樵采干扰后闽楠林乔木层主要种群的种间联结性。结果表明：闽楠林乔木层联结程度达到显著的种对很少，群落内105个种对中，7对正联结达显著以上水平，98对(占93.3%)联结不显著，种的分布较独立。与未受干扰的闽楠林群落种间联结比较说明，干扰对闽楠林乔木层主要种群种间联结性有一定的影响。并讨论了抽样单元面积分别为100m2、200m2和400m2时种间关联测定的准确性，抽样单元面积为100m2时适宜对闽楠林主要种群进行种间关联测定。

     

    Abstract: 2×2 contingency table,χ2 test,percentage co-occurrence(JI),association coefficient (AC) and spot relation coefficient (PCC) methods were used to determine the interspecific association of dominant species populations in the arbor layer of Phoebe bournei forest in Fengtou Village,Dongping Town, Zhenghe County,Fujian Province. Sampling lots were of the following areas:100m2,200m2 and 400m2. Results show that interspecific associations of most species pairs have no obvious correlation. Among 105 species pairs in arbor layer, there are 7 with significantly positive association and the other 98 are somewhat insignificant. This implies that the species are mostly independently distributed. Compared with undisturbed species communities, disturbance influences interspecific relation to a certain degree. χ2 tests, together with 100m2 quadrates explicitly display the characteristics of associations among the dominant vegetation species.

     

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