干旱区生态环境知识资源中心(Arid): 荒漠灌木生物量多尺度估测以梭梭为例

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	荒漠灌木生物量多尺度估测以梭梭为例
其他题名	Multi-scale biomass estimation of desert shrubs: a case study of Haloxylon ammodendron in the Gurbantunggut Desert, China
	陶冶; 张元明
来源期刊	草业学报
ISSN	1004-5759
出版年	2013
卷号	22 期号:6 页码:1-10
中文摘要	灌木是荒漠生态系统重要的组成部分,其生物量估算与分配特征是研究荒漠生态系统结构、功能、物质和能量流动的重要指标。但目前关于荒漠灌木生物量的研究仍较缺乏。破坏性的生物量估测方法不适宜在生态系统脆弱的荒漠地区大面积使用,因此通过模型法对灌木生物量进行多尺度估测具有重要意义。本研究以准噶尔荒漠生态系统建群种--梭梭为例,选择多种植物外部形态特征参数,利用相关生长模型(幂函数),分别在单株、样方及区域尺度对梭梭的地上(AGB)和地下生物量(BGB)进行建模和估算。结果表明,以植冠体积(CH)为指标的估测模型(AGB=0.3628CH~(0.9605))能较好地反映梭梭单株地上生物量累计特征,而单株地下生物量可通过模型BGB=0.8737AGB~(0.9394)得到。样方内梭梭总冠幅面积(TC)是估测样方(0.1 hm~2)总生物量(TAGB=0.6757TC~(1.1343), TBGB=0.6384TC~(1.0959))的有效参数。在大尺度上(区域),利用梭梭相对盖度(RC)估测其生物量密度(DAGB=0.0921RC~(1.1343), DBGB=0.0796RC~(1.0959))具有良好效果,进而结合区域面积得到梭梭总生物量。研究表明,相对盖度的方法从生物量密度的角度解决了尺度转换问题,使用时没有尺度限制。未来还可以通过航拍、遥感等手段快速获取相关区域梭梭群落相对盖度,结合上述模型准确估测其地上、地下生物量。
英文摘要	Shrubs are an important component of desert ecosystems. Their biomass allocation and biomass estimation are important indices to study the structure, function, mass, and energy flow of desert ecosystems. However, research on desert shrub biomasses is still limited. The current destructive biomass estimation is unsuitable for use in arid lands where the ecosystem is weak, so it is important to estimate the shrub biomass using models at multiple scales. In this study, the constructive shrub species Haloxylon ammodendron in the Junggar Desert was used as an example. A number of plant morphological parameters were chosen, and the aboveground (AGB) and belowground biomass (BGB) models were established at the individual plant, plot and regional scales using allometric (power function) equations. The biomass estimation was then performed using the same model. Based on the canopy volume (CH), the formula AGB=0.3628CH~(0.9605) accurately reflected the AGB individual accumulation characteristics. The individual BGB was estimated using BGB=0.8737AGB~(0.9394). The total canopy cover (TC) of H. ammodendron was an effective parameter to calculate the total AGB and BGB (TAGB=0.6757TC~(1.1343), TBGB=0.6384TC~(1.0959)) in sampling plots with an area of 0.1 hm~2. On a large, regional scale, the relative canopy cover (RC) had a positive effect on estimating the AGB and BGB densities (DAGB=0.0921RC~(1.1343), DBGB=0.0796RC~(1.0959)), from which the total regional biomass storage of H. ammodendron could be obtained. It showed that the issue of scaling was successfully resolved using the RC of the H. ammodendron biomass density. There was no scale limit when RC was used. In future, the RC of H. ammodendron can also be obtained quickly through aerial photography, remote sensing, etc, thus the total AGB and BGB in relevant regions would be estimated accurately using the aforementioned biomass density models.
中文关键词	生物量模型 ; 尺度转换 ; 相对盖度 ; 植冠体积 ; 梭梭群落
英文关键词	biomass model scaling relative cover canopy volume Haloxylon ammodendron community
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5016030
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229306
作者单位	中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	陶冶,张元明. 荒漠灌木生物量多尺度估测以梭梭为例[J]. 中国科学院新疆生态与地理研究所,2013,22(6):1-10.
APA	陶冶,&张元明.(2013).荒漠灌木生物量多尺度估测以梭梭为例.草业学报,22(6),1-10.
MLA	陶冶,et al."荒漠灌木生物量多尺度估测以梭梭为例".草业学报 22.6(2013):1-10.