| 不同生境条件下泡泡刺(Nitraria sphaerocarpa)种群的空间格局及动态分析 |
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| 引用本文： | 李秋艳,何志斌,赵文智,李启森.不同生境条件下泡泡刺(Nitraria sphaerocarpa)种群的空间格局及动态分析[J].中国沙漠,2004,24(4):484-488. |
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| 作者姓名： | 李秋艳 何志斌 赵文智 李启森 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,临泽内陆河流域综合研究站,甘肃,兰州,730000 |
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| 基金项目： | 中国科学院西部行动计划资助项目(KZCX1 09)，国家自然科学重点基金资助项目(40235053)，中国科学院知识创新工程资助项目 内陆河水土气生观测与综合研究(KZCX3 SW 329) |
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| 摘 要： | 应用生态空间理论(theory of spatial ecology)和地统计技术，分析了不同生境条件下泡泡刺种群的空间分布特征及其动态。结果表明：受气候条件的控制，泡泡刺种群是以斑块状格局形式存在。在较小的尺度上，生境条件起到了明显的作用，戈壁生境中的泡泡刺灌丛沙堆趋向于斑块小、密度大、空间自相关距离短，而沙漠生境中的结果相反。另外，沙埋和地下水位下降不仅为泡泡刺种群拓宽了生态位，而且是该种群演化的驱动力。
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| 关 键 词： | 泡泡刺种群 分布格局 生境 空间自相关性 |
| 文章编号： | 1000-694(2004)04-0484-05 |
| 修稿时间： | 2004年2月23日 |
Spatial Pattern of Nitraria sphaerocarpa Population and Dynamics in Different Habitats |
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| LI Qiu-yan,HE Zhi-bin,ZHAO Wen-zhi,LI Qi-sen.Spatial Pattern of Nitraria sphaerocarpa Population and Dynamics in Different Habitats[J].Journal of Desert Research,2004,24(4):484-488. |
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| Authors: | LI Qiu-yan HE Zhi-bin ZHAO Wen-zhi LI Qi-sen |
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| Abstract: | The theory of spatial ecology and geostatistics techniques are used to study the spatial pattern of Nitraria sphaerocarpa population and its dynamics in the different habitats. The results show that Nitraria sphaerocarpa population appears patch distribution and it is controlled by climate condition at the larger scales. But at the smaller scales, habitat conditions have significant impact on its spatial distribution. For example, the characteristics of Nitraria sphaerocarpa population on the Gobi desert are smaller patch, larger density and shorter distance of spatial autocorrelation, but that on sand habitat are contrary. Additionally, shrub dunes of Nitraria sphaerocarpa are generally formed through four accesses: seed germination, sucker propagation, larger patch falling into pieces and smaller patch combining through sand-bury. Sand-bury and groundwater decreasing not only broaden the ecological niche of Nitraria sphaerocarpa population, but also are the driving-force of the population dynamic. |
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| Keywords: | Nitraria sphaerocarpa population spatial pattern habitat spatial autocorrelation |
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