MODELLING THE SPATIAL DISTRIBUTION OF ABOVEGROUND BIOMASS BASED ON VEGETATION INDEX IN A TROPICAL FOREST IN BAWANG- LING, HAINAN ISLAND, SOUTH CHINA

doi:10.3773/j.issn.1005-264x.2009.05.001

Abstract

Abstract:

Aims The biomass of tropical forests plays an important role in the global carbon cycle; however, the distribution of tropical forest biomass based on vegetation index is seldom explored. Our objectives were to evaluate relationships between biomass and vegetation indices and to determine the spatial distribution of the aboveground biomass of tropical forest in Bawangling, Hainan Island, South China.
Methods Using measurements of forest biomass from 135 sample plots distributed over the study area, we correlated four vegetation indices (normalized difference vegetation index (NDVI), moisture vegetation index using Landsat’s 5 (MVI5), moisture vegetation index using Landsat’s band 7 (MVI7) and ratio vegetation index (RVI)) with aboveground biomass (total biomass, climax species biomass and pioneer species biomass) using the Pearson correlation method. We also developed models describing the relationships between forest aboveground biomass and vegetation indices using stepwise linear regression analysis. Three maps of biomass components were produced using the developed models, and residual maps were used to test the validity of the models.
Important findings MVI7and MVI5 are most effective for total biomass and climax species biomass, whereas NDVI and RVI seem to be good indices of pioneer species biomass. The strongly predictive percent areas for total species, climax species and pioneer species biomass models were 69.24, 73.98 and 88.08, respectively. Simulated biomasses of total species and climax species were distributed in the center, north and southwest parts of the study area; however, simulated biomass of pioneer species was scattered.

Key words: vegetation index, aboveground biomass, modeling, tropical forest, Hainan Island

ZHANG Zhi-Dong, ZANG Run-Guo. MODELLING THE SPATIAL DISTRIBUTION OF ABOVEGROUND BIOMASS BASED ON VEGETATION INDEX IN A TROPICAL FOREST IN BAWANG- LING, HAINAN ISLAND, SOUTH CHINA[J]. Chin J Plant Ecol, 2009, 33(5): 833-841.

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URL: https://www.plant-ecology.com/EN/10.3773/j.issn.1005-264x.2009.05.001

https://www.plant-ecology.com/EN/Y2009/V33/I5/833

Figures/Tables 4

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植被指数 Vegetation indices	缩写 Abbreviation	公式 Formula
归一化差异植被指数 Normalized difference vegetation index	NDVI	(NIR-R)/(NIR+R)
短红外湿度植被指数 Moisture vegetation index using Landsat’s band 5	MVI5	(NIR-SWIR)/(NIR+SWIR)
中红外湿度植被指数 Moisture vegetation index using Landsat’s band 7	MVI7	(NIR-MIR)/(NIR+MIR)
比值植被指数 Ratio vegetation index	RVI	NIR/R

植被指数 Vegetation indices	缩写 Abbreviation	公式 Formula
归一化差异植被指数 Normalized difference vegetation index	NDVI	(NIR-R)/(NIR+R)
短红外湿度植被指数 Moisture vegetation index using Landsat’s band 5	MVI5	(NIR-SWIR)/(NIR+SWIR)
中红外湿度植被指数 Moisture vegetation index using Landsat’s band 7	MVI7	(NIR-MIR)/(NIR+MIR)
比值植被指数 Ratio vegetation index	RVI	NIR/R

	NDVI	RVI	MVI7	MVI5
顶极种生物量 Climax species biomass	0.286^*	0.249^*	0.497^**	0.503^**
先锋种生物量 Pioneer species biomass	0.194^*	0.214^*	0.109	0.117
总生物量 Total biomass	0.284^*	0.246^*	0.511^**	0.505^**

	NDVI	RVI	MVI7	MVI5
顶极种生物量 Climax species biomass	0.286^*	0.249^*	0.497^**	0.503^**
先锋种生物量 Pioneer species biomass	0.194^*	0.214^*	0.109	0.117
总生物量 Total biomass	0.284^*	0.246^*	0.511^**	0.505^**

模型 Model	R²	F	p
总生物量 Total biomass Ln(Y)=-53.186+11.325Ln(MVI7)	0.761	42.407	<0.000 1
顶极种生物量 Climax species biomass Ln(Y)= -40.766+9.509Ln(MVI5)	0.753	40.579	<0.000 1
先锋种生物量 Pioneer species biomass Ln(Y)= -36.072+7.674Ln(RVI)	0.446	5.765	0.018