Factors influencing species diversity of ferns and fern allies in fragmented forest patches in the Kyoto city area
Factors influencing species diversity of ferns and fern allies in fragmented forest patches in the Kyoto city area
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DOI：
10.1016/j.landurbplan.2003.10.019
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发表时间：
2005-02
影响因子：
9.1
通讯作者：
K. Murakami;Hisayuki Maenaka;Y. Morimoto
中科院分区：
文献类型：
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作者：
K. Murakami;Hisayuki Maenaka;Y. Morimoto
研究了京都市区39个破碎化森林斑块的蕨类植物物种多样性与环境因子的关系。物种数量与微地貌多样性、人工生境多样性和林斑块面积的对数呈显著正相关。通过多元回归分析确定最佳模型，优化逐步选择解释的物种多样性变异量时，3个物种多样性指数(物种丰富度或Shannon多样性指数、逆Simpson指数的对数)与森林斑块面积的对数呈显著正相关，与山林隔离距离的对数呈显著负相关。因此，我们得出结论，蕨类植物物种多样性取决于斑块大小和与山林的隔离距离。木本植物种类-面积曲线与蕨类植物种类-面积曲线的比较表明，物种数(倾斜度)随面积的增加速率相同，但蕨类植物种类-面积曲线的Y截距小于木本植物的Y截距。因此，蕨类植物和蕨类植物联盟所需的最小保护面积大于木本植物物种。
We investigated the relationship between species diversity of pteridophytes and the environmental factors of 39 fragmented forest patches in the Kyoto city area. There was a significant correlation between the number of species and the micro-landform diversity, artificial habitat diversity, and logarithm of the area of the forest patch. When we performed a multiple regression analysis to identify the best-fit model so as to optimize the amount of variation in species diversity explained by using stepwise selection, three species diversity indices (species richness or Shannon’s diversity index, logarithm of inverse Simpson index) had significant positive partial correlations with the logarithm of area of the forest patch, and negative correlations with the logarithm of isolation distance from mountain forest. Therefore, we conclude that pteridophyte species diversity depends on patch size and isolation distance from mountain forests. Comparison of the woody plant species–area curve with the pteridophyte species–area curve showed that the rate of increase of species number (inclination) with area was the same, but the Y-intercept of the pteridophyte species–area curve was lower than that of the woody plant curve. Therefore, the minimum conservation area required for ferns and fern allies is greater than that for woody plant species.