| 大叶杨群落植物性系统多样性的分布格局 |
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| 引用本文： | 龙茹,尚策,曲上,张志翔.大叶杨群落植物性系统多样性的分布格局[J].北京林业大学学报,2011,33(5):34-41. |
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| 作者姓名： | 龙茹 尚策 曲上 张志翔 |
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| 作者单位： | 1 北京林业大学林木育种国家工程实验室，林木花卉遗传育种教育部重点实验室2 河北科技师范学院野生植物资源应用研究所 |
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| 基金项目： | 国务院三峡工程建设委员会办公室项目(SX2007-017KY03-07-01) |
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| 摘 要： | 应用丰富度指数、多样性指数、均匀度指数等指标,分析了湖北大老岭自然保护区不同样地大叶杨群落物种和性系统多样性。结果表明：组成大叶杨群落的植物共有182种,隶属于73科143属,其中单种属和寡种属占优势。大叶杨群落物种丰富度受海拔、坡向和林内小气候的影响,在样方3达峰值。从4个样地科属种的共有性来看,科的共有性较高,种的...
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| 关 键 词： | 大叶杨 性系统多样性 分布格局 |
| 收稿时间： | 1900-01-01 |
Distribution pattern of plant sexual system diversity in Populus lasiocarpa Oliv. community. |
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| LONG Ru , SHANG Ce, QU Shang, ZHANG Zhi-xiang.Distribution pattern of plant sexual system diversity in Populus lasiocarpa Oliv. community.[J].Journal of Beijing Forestry University,2011,33(5):34-41. |
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| Authors: | LONG Ru SHANG Ce QU Shang ZHANG Zhi-xiang |
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| Institution: | 1 National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, Beijing Forestry University, 100083, P. R. China; 2 Research Institute of Wild Plant Resources Application, Hebei Normal University of Science & Technology, Changli, 066600, P. R. China. |
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| Abstract: | The diversity of plant species and sexual system in a Populus lasiocarpa Oliv. community in the Dalaoling Nature Reserve of Hubei Province were assessed by richness index, diversity index and evenness index. In total, 182 species representing 143 genera in 73 families are recorded in P. lasiocarpa community. The genera with only one or two species occupy the dominant position in community. The species richness in P. lasiocarpa community is affected by the elevation, slope and the forest microenvironment. It reaches the maximum value at the quadrat 3. The more common families and less common species among the four quadrats are related to the degrees of difference among their microenvironments. The P. lasiocarpa community is in the process of succession. The age structure of P. lasiocarpa belongs to an increasing type in the quadrat 1, but a declining type for the other three quadrats. The sexual system of plants is diverse in P. lasiocarpa community. Hermaphroditism has the highest proportion and monoecious and dioecious plants also play the important role in the community. In the tree layer, the most important type is dioecy, which is consistent with the sexual system of the constructive species. The hermaphroditism is the most important type in the shrub and herb layers and the proportion of hermaphroditism increases with the increasing number of species in the herb layer. In addition, the importance values of the constructive species, P. lasiocarpa, is the maximum in the tree layer, especially in the quadrat 3. The changes of species diversity index are consistent with sexual system diversity index in the four quadrats. The diversity index of the tree layer change little, but it increased gradually with the increasing elevation in the shrub layer and reached the maximum at the quadrat 3 in the herb layer, which is affected by the number of species in different layers. The evenness index is the maximum in the lowest elevation in all three layers, indicating that the most even distribution of plant species and sexual system. |
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| Keywords: | Populus lasiocarpa Oliv sexual system diversity distribution pattern |
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