绿洲-沙漠过渡带；柽柳灌丛； 沙堆； 形态； 空间分布格局； 策勒； 塔克拉玛干沙漠," /> 绿洲-沙漠过渡带；柽柳灌丛； 沙堆； 形态； 空间分布格局； 策勒； 塔克拉玛干沙漠,"/> 绿洲-沙漠过渡带柽柳灌丛沙堆形态特征及空间分布格局
干旱区研究

干旱区研究 ›› 2014, Vol. 31 ›› Issue (3): 556-563.

• 陆面过程 • 上一篇    下一篇

绿洲-沙漠过渡带柽柳灌丛沙堆形态特征及空间分布格局

杨帆1,2,3，王雪芹3，何清1,2，郑新倩4，韩章勇3，霍文1,2   

  1. 1. 中国气象局乌鲁木齐沙漠气象研究所, 新疆 乌鲁木齐 830002; 2. 塔克拉玛干沙漠大气环境观测试验站,
    新疆 塔中 841000; 3. 中国科学院新疆生态与地理研究所 中国科学院生物地理与生物资源重点实验室,
     新疆 乌鲁木齐 830011; 4. 新疆农业气象台, 新疆乌鲁木齐 830002
  • 收稿日期:2012-12-27 修回日期:2013-03-07 出版日期:2014-05-15 发布日期:2014-05-30
  • 作者简介:杨帆(1987-)，男，实习研究员，主要从事沙漠气象与沙尘暴灾害的研究.E-mail: yangfan309@yeah.net
  • 基金资助:

    国家自然科学基金项目（41371042）；中国沙漠气象科学基金项目（Sqj2012015）共同资助

Morphological Features and Spatial Distribution Pattern of Tamarix  ramosissima Nebkhas in an Oasisdesert Ecotone

YANG Fan, WANG Xue-qin, HE Qing, ZHENG Xin-qian, HAN Zhang-yong,HUO Wen   

  1. 1. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
    2. Taklimakan Desert Atmosphere and Environment Station, Tazhong 841000, Xinjiang, China;
    3. Key Laboratory of Biogeography and Bioresources in Arid Land, Xinjiang Institute of Ecology and Geography, 
    Chinese Academy of Sciences, Urumqi 830011, China;
    4. Xinjiang Agrometeorological Observatory, Urumqi 830002, China
  • Received:2012-12-27 Revised:2013-03-07 Published:2014-05-15 Online:2014-05-30

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被引次数

19

摘要： 以策勒绿洲-沙漠过渡带为研究区域，分析位于过渡带内侧、中部及外围的柽柳灌丛沙堆的形态特征、形态参数间关系、大尺度内空间分布格局以及相应的变化规律。结果表明：① 柽柳沙堆的典型形态呈凸起半椭球状，上部被柽柳灌丛覆盖，沙堆高0.27～3.21 m，体积0.30~291.63 m3，树冠面积2.39～128.76 m2。过渡带由内向外单体沙堆及灌丛尺度显著增加，且沙堆外形向着沿风向拉长的不对称蝌蚪状发展。② 柽柳灌丛沙堆各形态参数间存在良好的相关性，其中沙堆长度与宽度、底面积与高度间的显著回归关系会随过渡带由内向外逐渐由线性关系变为二次函数；柽柳树冠面积与沙堆体积间呈显著线性关系，其斜率会随过渡带由内向外逐渐增加。③ 柽柳沙堆分布密度沿过渡带由内向外逐渐降低，且空间格局类型会在100~250 m较大尺度范围上从聚集转向随机，整体聚集强度增加，而聚集强度峰值所在尺度和聚集规模则逐渐缩小。目前，该区域柽柳沙堆整体处于增长阶段，且可判定沙堆的产生是由土地退化引起的，其中过渡带外侧现处于快速退化时期。

关键词: font-size: 10.5pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, 绿洲-沙漠过渡带；柽柳灌丛； 沙堆； 形态； 空间分布格局； 策勒； 塔克拉玛干沙漠')">mso-bidi-language: AR-SA">绿洲-沙漠过渡带；柽柳灌丛； 沙堆； 形态； 空间分布格局； 策勒； 塔克拉玛干沙漠

Abstract: The morphological features of [WTBX]Tamarix ramosissima[WTBZ] nebkhas in three different sample plots in the internal, central and peripheral areas of the oasisdesert ecotone in Qira, Xinjiang were investigated. The relationships among the morphological parameters, spatial distribution pattern and corresponding variation were quantitatively analyzed. The results are as follows: ① The [WTBX]Tamarix ramosissima[WTBZ] nebkhases were convex and semiellipticalshaped, and they were covered with thickets. The values of nebkhas height and volume and crown area of [WTBX]T. ramosissima[WTBZ] varied in ranges of 0.27-3.21 m, 0.30-291.63 m3 and 2.39-128.76 m2 respectively. From the internal area to the peripheral area of the oasisdesert ecotone, the scale of nebkhas became larger, and the thickets grew luxuriantly;② There were the significant correlations among the morphological parameters of nebkhas. Among them the significant regression relationships between nebkhas length and width, nebkhas area and height changed gradually from linear relation to quadratic function for the nebkhases from the internal area to the peripheral area of the ecotone. There was a significant linear relationship between the crown area of [WTBX]T.ramosissima[WTBZ] and the nebkhas; ③ From the internal area to the peripheral area of the oasisdesert ecotone, the nebkhas density reduced, the spatial distribution pattern of nebkhas changed from aggregation to random pattern at spatial scale of 100-250 m, and the aggregation degree decreased. The nebkhases are currently still at growing stage, and it was considered that the formation and development of nebkhas is caused by land degradation.

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