黑河上游天涝池流域灌丛地上生物量空间分布  

The spatial distribution of the aboveground biomass shrub in Tianlaochi catchment in the upper reaches of Heihe River

作　　者：李文娟[1] 赵传燕[1] 彭守璋[1] 王清涛[1] 马文瑛[1] 袁亚鹏[1] 高婵婵 

机构地区：[1]兰州大学生命科学学院,草地农业生态系统国家重点实验室,兰州730000

出　　处：《生态学报》2015年第4期1134-1141,共8页Acta Ecologica Sinica

基　　金：国家自然科学基金重点项目(91025015)

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灌丛为研究对象,基于野外调查结合研究区机载Li DAR(Light Detection And Ranging)数据和Geoeye-1影像,研究灌丛地上生物量的空间分布。结果表明:样方生物量与易测因子(平均丛高和样方盖度)呈幂函数关系;机载Li DAR数据能够较精确地反演灌丛平均高度以及样方盖度;利用其反演数据获得研究区灌丛地上总生物量为141 t;单位面积最大地上生物量为691.8 g/m2;在海拔3300—3400 m高度带灌丛地上生物量最大,为40.4 t;在海拔2655—3300 m高度带,随着海拔的升高灌丛地上总生物量在增加;在海拔3400—3750 m高度带,随着海拔的升高而灌丛地上总生物量逐渐减少。Qilian Mountain is water source areas of Heihe River, Shiyang River and Shule River. 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 Mountain, especially in the upper reaches of Heihe River. To protect ecological environment of the upper reaches the natural reserve of Qilian Mountain has been established in 1989, Which plays a significant duty on conservation of natural vegetation. The shrub plays an important role in conservation water. The characteristics of the community are less studied. We selected Tianlaochi catchment in the upper reaches of Heihe River as study area and took the four typical alpine shrubs （ Dasiphora fruticosa , Caragana jubata , Salix atrata and Spiraea alpine） as the study objects. We estimated aboveground biomass by remote sensing data combining with measurements. First, investigation was carried out in August of 2011 and 2012. We measured the shrub coverage, the height and biomass in many sampling points. According to the observed data, the relationship between biomass and coverage and height was built. Second, we collected remote sensing, such as airborne LiDAR （Light Detection And Ranging） and high-resolution remote sensing image （Geoeye-1 ）. The LiDAR data was used to obtain the spatial distribution of shrub height. Geoeye- 1 data was used to retrieve the spatial distribution of shrub coverage. Third, we calculated the spatial distribution of shrub aboveground biomass by the relationship and the spatial distribution of shrub height and coverage in Arclnfo. The results show that the relationship between the aboveground biomass and shrub height and coverage is a power function. The spatial distribution of aboveground biomass has

关 键 词：灌丛 地上生物量 黑河上游 空间分布 机载激光雷达 

分 类 号：Q948[生物学—植物学]