| 黑河上游天涝池流域典型灌木生态参数研究 |
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| 引用本文： | 李文娟,黄力平,赵传燕,胡东宇,王清涛.黑河上游天涝池流域典型灌木生态参数研究[J].干旱区地理,2018,41(5):1073-1079. |
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| 作者姓名： | 李文娟 黄力平 赵传燕 胡东宇 王清涛 |
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| 作者单位： | 1.达坂城区人民政府办公室, 新疆 乌鲁木齐 830000;2.新疆林业科学院现代林业研究所, 新疆 乌鲁木齐 830000;3.兰州大学草地农业科学技术学院草地农业生态系统国家重点实验室, 甘肃 兰州 730000;4.河北工程大学园林与生态工程学院, 河北 邯郸 056038 |
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| 基金项目： | 国家青年基金项目（41605047）；中国科学院战略性先导科技专项（XDA05050202） |
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| 摘 要： | 祁连山自然保护区是河西地区重要的水源涵养区，而灌丛作为祁连山主要植被类型之一，对该区水源涵养功能具有举足轻重的作用。以黑河上游天涝池流域两种典型亚高山灌木为研究对象，基于2014、2015年野外观测和ArcGIS10.1分析功能，获得灌木生长季期间生态参数（叶面积、叶面积指数和比叶面积）的变化；同时，结合分辨率为0.5 m×0.5 m的LiDAR数据和Geoeye-1影像数据，估算研究区灌木叶面积指数的空间分布。研究结果表明：灌木在生长季期间比叶面积值在一定范围内波动；叶面积、叶面积指数变化较大。其中，在6、7月份增加最明显，8月份趋于稳定，9月份叶片开始凋落。其次，随海拔梯度水热条件的不同，流域灌木叶面积指数空间异质性较大，以海拔3 400 m为节点，在3 200~3 400 m海拔带叶面积指数呈递增趋势，在3 400~3 750叶面积指数呈递减趋势。
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| 关 键 词： | 黑河上游 灌木 生态参数 生长季 |
| 收稿时间： | 2018-03-22 |
Ecological parameters of a typical shrub in Tiaolaochi catchment in the upper reach of Heihe River |
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| LI Wen-juan,HUANG Li-ping,ZHAO Chuan-yan,HU Dong-yu,WANG Qing-tao.Ecological parameters of a typical shrub in Tiaolaochi catchment in the upper reach of Heihe River[J].Arid Land Geography,2018,41(5):1073-1079. |
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| Authors: | LI Wen-juan HUANG Li-ping ZHAO Chuan-yan HU Dong-yu WANG Qing-tao |
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| Affiliation: | 1.Government Office of Dabancheng District, Urumqi 830000, Xinjiang, China;2.Institute of Modern Forestry, Xinjiang Academy of Forestry Science, Urumqi 830000, Xinjiang, China;3.State Key Laboratory of Grassland and Agro-Ecosystem, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, China;4.College of landscape and Ecological Engineering, Hebei University of Engineering, Handan 056038, Hebei, China |
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| Abstract: | Qilian Mountains is the water conservation area of the Heihe River,Shiyang River and Shule River in northwest China.The Heihe River as the second longest inland river in China has been paid more attention due to its eco-environmental problems.These problems include the continuous decrease in the discharge water of the Heihe River,desertification,salinization and the increase of sand storms.Therefore,a series of conservation programs have been conducted for ecological environmental restoration in Qilian Mountains,especially in the upper reaches of the Heihe River.We selected Tianlaochi catchment in the upper reaches of the Heihe River as the study area and investigated the ecological parameters (i.e.,leaf area,leaf area index,specific leaf area) of a typical shrub species (Dasiphora fruticosa,Caragana jubata) during its growing period.Firstly,the investigation was carried out from May to September in 2014 and 2015.Secondly,we used the remotely sensed data,such as airborne LiDAR (Light Detection and Ranging) and high-resolution remote sensing image (Geoeye-1),to obtain the spatial distribution of shrub leaf area index.The results showed that the specific leaf area was fluctuated during the growing period.The leaf area and leaf area index of shrub were changed obviously,with a significant increase in June and July.However,the result tended to be stabilized in August.The leaf of shrub began to fall in September.With different hydrothermal conditions along the elevation gradient,the spatial distribution of leaf area index presented a great variety.The leaf area index of shrub was increased with the increase of elevation from 3 200 meter to 3 400 meter,nevertheless,it was decreased with an increase of elevation from 3 400 meter to 3 750 meter.The variation of leaf area index with elevation resulted from the combination of the precipitation and temperature.The retrieved parameters will provide inputs for the distributed eco-hydrological model built in the subsequent research. |
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| Keywords: | the upper reaches of Heihe River shrub growing period ecological parameters |
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