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首页> 外文期刊>Acta Botanica Gallica: Bulletin de la Societe Botanique de France >Variation of the floristic composition of the traditional fruit-lofts after abandonment in savannah zone [Variation de la composition floristique des fruitiers traditionnels après abandon en zone de savane]
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Variation of the floristic composition of the traditional fruit-lofts after abandonment in savannah zone [Variation de la composition floristique des fruitiers traditionnels après abandon en zone de savane]

机译：萨凡纳区被遗弃后的传统水果阁的植物组成变化[萨凡纳区被遗弃后的传统水果阁的植物组成变化]

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摘要

The floristic diversity of two batches of traditional orchards of ± 20 and ± 40 years were studied according to the degree of anthropogenic activity. Installed in savannah, the orchards of ± 20 years are maintained, whereas those of ± 40 years are abandoned since more than one score of year. The inventory counts 24 species of which 21% are common to both batches of orchards. The respective average densities are of 94 ± 3.46 trees.ha-1 and 102 ± 2 trees.ha-1. The coefficients of similarity of Jaccard and S?rensen discriminate the two batches, whereas the diversity indexes of Shannon (0.79 ± 0.38 and 0.93 ± 0.02) and of Simpson (5.63 ± 1.05 and 13.74 ± 1.79), underline their weak diversification. As for the index of Pielou (0.42 ± 0.17 and 0.46 ± 0.02), it marks a predominance in the two batches of orchards. The phytogeographic data characterise the Guineo-Congolian basic element (29.16%), although the flora is being dominated by the settler species (50%) of pantropical distribution.
机译：根据人为活动的程度，研究了两批±20和±40年的传统果园的植物区系。安装在大草原上的果园保持±20年，而±40年的果园由于一年以上的得分而被废弃。存货共有24种，其中两批果园共有21％。各自的平均密度为94±3.46 tree.ha-1和102±2 tree.ha-1。 Jaccard和S？rensen的相似系数区分了这两个批次，而Shannon（0.79±0.38和0.93±0.02）和Simpson（5.63±1.05和13.74±1.79）的多样性指数突出了它们的弱多样性。至于Pielou的指数（0.42±0.17和0.46±0.02），则在两批果园中占主导地位。植物地理数据是几内亚-刚果基本元素的特征（29.16％），尽管该植物区系由泛热带分布的定居者物种（50％）控制。

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