| 敦煌西湖荒漠-湿地生态系统植被与土壤水分空间异质性研究 |
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| 引用本文： | 陈文业,赵明,张继强,李广宇,吴三雄,袁海峰,窦英杰,吴婷,陈旭,罗文莉,朱丽,邴丹珲,冯颖,孙飞达,谈嫣蓉.敦煌西湖荒漠-湿地生态系统植被与土壤水分空间异质性研究[J].冰川冻土,2015,37(6):1670-1679. |
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| 作者姓名： | 陈文业 赵明 张继强 李广宇 吴三雄 袁海峰 窦英杰 吴婷 陈旭 罗文莉 朱丽 邴丹珲 冯颖 孙飞达 谈嫣蓉 |
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| 作者单位： | 1. 甘肃省林业科学研究院, 甘肃 兰州 730020;2. 甘肃林研科技工程公司, 甘肃 兰州 730020;3. 甘肃敦煌西湖国家级自然保护区管理局, 甘肃 敦煌 736200;4. 甘肃敦煌西湖湿地生态系统国家定位观测研究站, 甘肃 敦煌 736200;5. 四川农业大学 草业科学系, 四川 雅安 625014 |
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| 基金项目： | 甘肃省科技重大专项计划项目(1302FKDA035)；甘肃省科技支撑计划项目(1011FKCA136) |
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| 摘 要： | 基于敦煌西湖荒漠-湿地生态系统植被与土壤特性调查, 采用地统计学方法, 研究了敦煌西湖荒漠-湿地生态系统的土壤水分和植被的空间变异特征. 结果表明: 研究区植被盖度、高度和多度的平均值分别为36.14%、80.42 cm和0.66株·m2, 变异系数依次为117.52%、124.63%和36.50%, 植被盖度和高度均为高度变异, 植被多度为中等变异; 0~200 cm土层各层土壤湿度平均值为14.873%, 介于6.681%~ 23.004%, 变异系数介于39.28%~88.65%. 200 cm土层水分贮量平均值为163.598 mm, 变异系数为36.51%, 0~200 cm土层各层土壤湿度和2 m土层水分贮量均为中等变异. 植被特征与土壤特性各要素的基台值(C0+C)介于0.112~0.549, 结构比介于76.6%~97.6%, 各变量具有较强的空间自相关性. 研究区植被型组由盐池湾向南呈沼泽→盐沼→草甸→阔叶林→荒漠演变过程, 植被特征与土壤特性在样带空间分布上具有明显的规律性, 且存在较强的空间自相关性和格局.
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| 关 键 词： | 敦煌西湖 湿地生态系统 土壤水分 植被 空间异质性 |
| 收稿时间： | 2015-09-27 |
| 修稿时间： | 2015-11-05 |
Spatial heterogeneity of vegetation and soil moisture in the desert-wetland ecosystem in Dunhuang Xihu,Gansu Province,China |
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| CHEN Wenye,ZHAO Ming,ZHANG Jiqiang,LI Guangyu,WU Sanxiong,YUAN Haifeng,DOU Yingjie,WU Ting,CHEN Xu,LUO Wenli,ZHU Li,BING Danhui,FENG Ying,SUN Feida,TAN Yanrong.Spatial heterogeneity of vegetation and soil moisture in the desert-wetland ecosystem in Dunhuang Xihu,Gansu Province,China[J].Journal of Glaciology and Geocryology,2015,37(6):1670-1679. |
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| Authors: | CHEN Wenye ZHAO Ming ZHANG Jiqiang LI Guangyu WU Sanxiong YUAN Haifeng DOU Yingjie WU Ting CHEN Xu LUO Wenli ZHU Li BING Danhui FENG Ying SUN Feida TAN Yanrong |
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| Institution: | 1. Gansu Forestry Science and Technology Research Academy, Lanzhou 730020,China;2. Gansu Forest Science and Technology Engineering Company, Lanzhou 730020, China;3. Administrative Bureau of Gansu Dunhuang Xihu National Nature Reserve, Dunhuang 736200, Gansu, China;4. National Positioning Observation Station of Dunhuang Xihu Wetland Ecosystem in Dunhuang of Gansu, Dunhuang 736200, Gansu, China;5. Department of Grassland Science, Sichuan Agricultural University, Ya'an, 625014, Sichuan, China |
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| Abstract: | Based on the investigation of vegetation and soil properties,the spatial heterogeneity of vegetation and soil moisture in Dunhuang Xihu desert-wetland ecosystem were studied with geostatistics.The results showed that the vegetation coverage,height and density were 36.14%,80.42 cm and 0.66 plant·m-2;the variation coeffi-cient of vegetation coverage and height were 1 17.52%,124.63%,characterized with highly divergent,but the variation coefficient of vegetation density was 36.50%,characterized with medium divergent;the soil moisture from 0 to 200 cm depth ranged from 6.681% to 23.004%,and the variation coefficient was between 39.28%and 88.65%;the moisture stored in the 200 cm soil was 163.598 mm on average,with a variation coefficient of 36 .5 1%.Thus,the soil moisture from 0 to 200 cm depth and the moisture stored in the soil of 200 cm both were characterized with medium divergent;sill (C0 +C)of vegetation characteristics and soil properties varied from 0.1 12 to 0.549,with texture ratio between 0.766% and 0.976% and high spatial autocorrelation of all varia-bles;the succession of vegetation type group showed a regularity as swamp→saline marsh→meadow→broad-leaved forest→desert southwards from Yanchiwan,also the vegetation characteristics and soil properties presented obvious spatial regularity and high spatial autocorrelation. |
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| Keywords: | Dunhuang Xihu wetland ecosystem soil moisture vegetation spatial heterogeneity |
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