| 岷江上游亚高山植物群落主要乔、灌木树种生态位研究 |
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| 引用本文： | 陈秀明,李荣伟,王乐辉,何飞,刘利平,科金.岷江上游亚高山植物群落主要乔、灌木树种生态位研究[J].四川林业科技,2005,26(5):12-19. |
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| 作者姓名： | 陈秀明 李荣伟 王乐辉 何飞 刘利平 科金 |
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| 作者单位： | 四川省林业科学研究院,四川,成都,610081;松潘县林业局,四川,松潘,623300 |
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| 基金项目： | 本文是国家攻关子专题“亚高山区森林生态系统快速恢复技术与示范”的研究内容之一（2001BA606A-05-02）. |
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| 摘 要： | 乔木采用胸高断面积和重要值、灌木采用相对盖度和重要值,应用Smith公式、Hurlbert公式以及Levins的Shannon-Wiener公式和Simpson公式分别计算了岷江上游亚高山植物群落中14个主要乔木种和20个主要灌木种的生态位宽度;应用Pianka公式计算了它们的生态位重叠.结果表明岷江上游亚高山主要森林群落中主要优势种的生态位宽度较大,Smith生态位宽度值较大的乔木有：粗枝云杉（0.900）、红桦（0.969）、紫果云杉（0.853）、岷江冷杉（0.894）、密枝圆柏（1.000）、油松（0.936）、辽东栎（0.923）;灌木种中Smith生态位宽度较大的有：华西箭竹（0.497）、高山绣线菊（0.403）、缺苞箭竹（0.376）、窄叶鲜卑花（0.339）、柳叶忍冬（0.308）.14种乔木的91个种对中只有40个种对有生态位重叠,占44%;20种灌木有226个种对,98个种对有重叠,占43%.在以较大区域为研究范围时,生态位宽度较大的树种是其所处生境的优势种,与其它种的重叠值不一定大;重叠值较大的种对分布的生境相近,能利用相同的环境资源,与竞争关系不大.
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| 关 键 词： | 岷江上游 亚高山森林群落 生态位宽度 生态位重叠 |
| 文章编号： | 1003-5508(2005)05-0012-08 |
| 收稿时间： | 2005-08-26 |
| 修稿时间： | 2005年8月26日 |
Researches on the Niche of the Major Tree and Shrub Species in Vegetation Communities of Sub-alpine Forests in the Upper Reaches of the Minjiang River |
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| CHEN Xiu-ming,LI Rong-wei,WANG Le-hui,HE Fei,LIU Li-ping,KE Jin.Researches on the Niche of the Major Tree and Shrub Species in Vegetation Communities of Sub-alpine Forests in the Upper Reaches of the Minjiang River[J].Journal of Sichuan Forestry Science and Technology,2005,26(5):12-19. |
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| Authors: | CHEN Xiu-ming LI Rong-wei WANG Le-hui HE Fei LIU Li-ping KE Jin |
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| Institution: | 1. Sichuan Academy of Forestry,Chengdu 610081 ;2. Songpan Forestry Bureau,Songpan 623300 |
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| Abstract: | The niche breadths and overlaps of 14 tree species and 20 shrub species in vegetation communities of sub-alpine forests in the upper reach of the Minjiang River were measured by using the formulas described by Smith,hurlbert,Shannon-Wiener,Simpson and Pianka.The results have shown that the niche breadth values of the dominant species are greater,tree species with greater values of Smith's niche breadths are:Picea asperata(0.9),Betula albo-sinensis(0.969),Picea purpurea(0.853),Abies faxoniana(0.894),Sabina convallium(1.0),Pinus tabulaefurmis(0.936) and Quercus liaotungensis(0.923);shrub species: Fargesia nitida(0.497),Spiraea alpine(0.403),Fargesia denudate(0.376),Sibiraea angustata(0.339) and lonicera lanceolata(0.308).For the 14 tree species,40 pairs have niche overlapping among total 91 pairs,accounting for 44%.For the 20 shrub species,98 pairs have niche overlapping among total 226 pairs,accounting for 43%.The species with greater niche breadth values are dominant populations within their habitats,the niche overlap values with other species are not great.The species pairs with greater niche overlap values have similar habitat conditions,and the competition among the species is not significant. |
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| Keywords: | The upper reach of the Mingjiang River Sub-alpine forests Niche breadth Niche overlap |
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