干旱区生态环境知识资源中心(Arid): 昌邑海洋保护区柽柳灌丛枝干生物量估算方法

Arid

	昌邑海洋保护区柽柳灌丛枝干生物量估算方法
其他题名	Modeling stem and branch biomass of Tamarix spp. in the marine protected area in Changyi, China
	王炜; 王保栋; 徐宗军; 章彦华; 王宗灵
来源期刊	生态学报
ISSN	1000-0933
出版年	2016
卷号	36 期号:8 页码:2202-2209
中文摘要	柽柳属植物(Tamarix spp.)是我国沙漠干旱地区和滨海盐渍化地区的重要树种,具有较高的生态价值。在滨海地区,柽柳是一种典型灌木,分枝多、可塑性高,以往对柽柳生物量模型的研究,多以直立枝基径和长度作为自变量,此方法虽有较高精度, 但工作繁琐。因此,研究以昌邑海洋生态保护区的柽柳林为对象,分别以株高冠幅组合、冠幅为自变量,以一元线性、幂函数、二次多项式等形式建立柽柳枝干鲜重的回归方程,并进行验证比较,目的是建立准确高效且适合滨海地区的柽柳生物量估测方法。结果表明:(1)对滨海地区柽柳林,冠幅和株高是较好的测树因子,以此建立回归方程,简便易行、准确可靠,应用前景较好;(2)综合方程的准确性和稳定性,无论以冠幅株高组合,还是单以冠幅作为自变量,均确定幂函数形式的回归方程为最优, 经验证与实测值的偏差分别为-2.22%和2.92%;(3)基于冠幅的方程虽预测精度稍差,但由于冠幅面积可从高分辨遥感影像上直接提取,因而有极好应用前景;(4)R~2是评价模型优劣的重要标准,但仅以此为标准并不严谨,还需结合其他验证方法;(5)测区柽柳的株高、冠幅、鲜重的均值分别为(215.241.4) cm,(2.492.21) m~2, (4.155.80) kg,建议通过人工管理的方式提高林分质量。
英文摘要	Tamarix spp. are woody plants that are widely distributed throughout the world, and they have ecological importance in the arid and salinized areas of China. However, methods for modeling the biomass of Tamarix spp. and other multi-stemmed shrubs are inadequate. Diameter measurements (such as diameter at breast height) are frequently used and have proved to correlate well with biomass; however, such methods are difficult to apply for Tamarix because of its irregular growth patterns and multiple stems. Modeling shrub biomass has received more attention in recent years, and several studies have indicated that for shrubs shaped like cylinders or cones, the crown area was significantly correlated with shrub biomass. Considering the constraints of diameter measurements for Tamarix spp.,we modeled Tamarix spp. biomass using crown width and height in Changyi Marine Protected Area (Shandong Province, China; 37o06’15"N,119o22’00"E). The area containing Tamarix spp. (T. chinensis and T. austromongolica) was approximately 20.7 km~2. In February 2014, nine sample plots (30 m * 30 m) were selected, and three embedded plots (5 m * 5 m) were placed randomly in each plot. Prior to harvesting,the height (H), basal diameter (BD),and crown area (C) of 247 Tamarix individuals in the embedded plots were measured. Fresh weights (FW) were collected after harvesting. At the time of sampling, the trees had no foliage,and thus the FW included only stems and branches. One hundred and eighty-nine individuals were selected randomly to establish the regression equations, while the remaining 58 individuals were used for testing the accuracy of these equations. CH (the product of CxH) and C were chosen as independent variables, and the regression equations were established in the form of linear, power-law, and quadratic polynomials. The equations based on CH were FW = 0.856 x(CH) - 0.879 (R~2= 0.884,F = 1428.5),FW = 0.403 * (CH) ~(1.226) (R~2= 0.900, F = 1396.1), and FW = 0.010 x(CH)~2 + 0.562 * (CH) + 0.114(R~2= 0.903, F = 875.7),whereas the equations based on C were FW = 2.462 x C -1.893 (R~2= 0.825, F = 881.8), FW = 0.900 * C~(1.440) (R~2= 0.861, F = 966.3),and FW = 0.144 * C~2 + 1.007 x C + 0.127 (R~2 = 0.864,F = 600.7). Although quadratic polynomial equations had higher R~2 values, the power-law functions performed best in the test, as they had deviations of -2.22% (CH) and 2.92% (C). Furthermore, because the power-law function is the most widely used allometric equation, we recommend establishing regression equations using power-law functions in this area. As tree crown properties can be reconstructed using high-resolution satellite data,allometric equations that use C as the only independent variable may provide a more cost-efficient way of monitoring,reporting,and verifying the carbon stocks of Tamarix spp. The mean values of H, BD,C, and FW in the study area were (215.2 41.4)cm,(4.2 1.9)cm,(2.49 2.21)m~2,and (4.15 5.80)kg (mean SD),respectively; therefore, artificial management should be enhanced to improve the stand quality.
中文关键词	柽柳 ; 异速生长方程 ; 冠幅 ; 地上生物量
英文关键词	Tamarix spp. allometric equation crown area above-ground biomass
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Life Sciences & Biomedicine - Other Topics
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5686780
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234763
作者单位	王炜, 国家海洋局第一海洋研究所, 青岛, 山东 266061, 中国.; 王保栋, 国家海洋局第一海洋研究所, 青岛, 山东 266061, 中国.; 徐宗军, 国家海洋局第一海洋研究所, 青岛, 山东 266061, 中国.; 王宗灵, 国家海洋局第一海洋研究所, 青岛, 山东 266061, 中国.; 章彦华, 山东省潍坊市昌邑海洋生态特别保护区管理委员会, 昌邑, 吉林 261300, 中国.
推荐引用方式 GB/T 7714	王炜,王保栋,徐宗军,等. 昌邑海洋保护区柽柳灌丛枝干生物量估算方法[J],2016,36(8):2202-2209.
APA	王炜,王保栋,徐宗军,章彦华,&王宗灵.(2016).昌邑海洋保护区柽柳灌丛枝干生物量估算方法.生态学报,36(8),2202-2209.
MLA	王炜,et al."昌邑海洋保护区柽柳灌丛枝干生物量估算方法".生态学报 36.8(2016):2202-2209.