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    2018年祁连山“山水林田湖草”系统生态功能和生物多样性现状

    摘要

    祁连山是我国西部重要的生态安全屏障和黄河及诸多内陆河的重要水源地,也是我国生物多样性保护的优先区。本报告通过地面综合观测网与以无人机、高分卫星、中高分辨率卫星为主的空—天多源遥感监测系统的有机集成,构建了覆盖祁连山地区“山水林田湖草”系统的天空地一体化监测系统,生成了祁连山多源、多尺度、多要素的综合监测数据集。在此基础上,进行了祁连山“山水林田湖草”系统生态功能和生物多样性现状评估。结合前人的结果与我们的研究发现:①2018年祁连山全域平均净第一性生产力约为103。11gCm-2a-1,其中森林最高,可达334。50gCm-2,而荒漠最低,约73。51gCm-2a-1;②全域总固碳量约达206TgC,其中荒漠/高山稀疏植被的总固碳量最高,约为107TgC,其次草地约为65TgC;③2018年全区域不同生态系统面雨量226。76mm,平均蒸散396。07mm,产水强度12。96mm,潜在的土壤储水为负值,全区域土壤水分处于亏缺状态;④高等植物约1311种,野生脊椎动物约286种,大型真菌约52种;⑤记录并鉴定的鸟类23种、兽类20种,其中国家Ⅰ级重点保护鸟类和兽类各3种,鸟类种间年活动节律相差较大,而有蹄目动物年活动高峰期呈双峰型,分别为5月和9月左右;⑥甘肃马鹿和岩羊相对丰富度指数较高,而以畜牧为主的人为生产活动对祁丰样区的物种活动干扰较为严重,建议相关部门进一步加强对放牧的管控。上述研究结果为系统深入认识祁连山“山水林田湖草”系统生态功能和生物多样性现状提供了科学依据和数据支撑。

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    Abstract

    Qilian Mountain is an important ecological security barrier in western China and an important water source for the Yellow River and many inland rivers. It is also a priority area for biodiversity conservation in China. In this study,through the organic integration of the ground integrated observation network and the air-day multi-source remote sensing monitoring system based on UAV-high-resolution satellite-medium-high-resolution satellites,the sky covering the landscape of the mountain and forest lakes and grasses in the Qilian Mountains was constructed. The integrated monitoring system of the ground has generated a comprehensive monitoring data set of multi-source,multi-scale and multi-factors of Qilian Mountain. On this basis,the ecological function and biodiversity status of the Qilian Mountain “Landscape of Lakes and Lakes” were evaluated. Combined with the results of the predecessors and our research findings:(1)The average net primary productivity of Qilian Mountain in 2018 is about 103.11 gC/m2/a,of which the highest forest is 334.50 gC/m2/a,while the desert is the lowest. About 73.51 gC/m2/a;(2)The total carbon sequestration in the whole region is about 206 TgC,of which the total carbon sequestration of desert/alpine sparse vegetation is the highest,about 107TgC,and the second grassland is about 65 TgC;(3)2018 The rainfall of different ecosystems in the whole region is 226.76mm,the average evapotranspiration is 396.07mm,the water production intensity is 12.96mm,the potential soil water storage is negative,the soil moisture in the whole region is in a deficit state;(4)about 1311 species of higher plants and wild spines There are about 286 species of animals and about 52 species of large fungi;(5)23 species of birds and 20 species of mammals recorded and identified,including 3 species of national protected birds and 3 species of mammals,and annual activity rhythms among birds. The difference is large,and the annual peak activity of the hoofed animals is bimodal,which is about May and September respectively. (6)The relative abundance index of Gansu red deer and rock sheep is higher,while the animal husbandry is the main one. The production activities have a serious interference with the species activities in the Fengfeng sample area. The relevant departments to further strengthen the management and control of grazing. The above research results provide a scientific basis and data support for the systematic understanding of the ecological functions and biodiversity status of the Qilian Mountain “Landscape Lake Grassland” system.

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    作者简介
    赵长明:赵长明,兰州大学生命科学学院教授,主要从事树木生理与森林生态学、生态系统生态学、野生植物资源保护与利用研究。
    刘绍民:刘绍民,北京师范大学教授,主要从事水文气象与遥感研究。
    黄永梅:黄永梅,北京师范大学教授,主要从事资源生态方向研究。
    张立勋:张立勋,兰州大学生命科学学院高级实验师,主要从事分子生态遗传学、鸟类表型变异与进化生态学、保护生物学与生物多样性研究。
    朱忠礼:朱忠礼,北京师范大学副教授,主要从事土壤和植被遥感研究。
    陈锡云:陈锡云,北京师范大学副教授,主要从事陆地生态系统水文生物地球化学过程和化学效应研究。
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