基于森林冠层高度和异速生长方程的中国红树林地上生物量估算

doi:10.13284/j.cnki.rddl.003616

Abstract

Abstract:

Mangroves, which have extremely high primary productivity, are efficient coastal blue carbon ecosystems. Aboveground biomass (AGB) is an important component of vegetation carbon pools. Thus, accurate estimation of mangrove AGB is critical for studying carbon cycle and climate change. While the practical significance and application of information obtained on mangrove AGB in China is apparent, studies of this nature in China at a national scale have rarely been reported. Remote sensing technology is convenient, efficient, has a wide observational range, and can be used for large-scale ecosystem monitoring. Canopy height is a structural parameter that is positively correlated with the AGB of vegetation. The Global Ecosystem Dynamics Investigation (GEDI) spaceborne Light Detection and Ranging (LiDAR) satellite, launched in recent years, is able to obtain vegetation canopy height. This study employed forest canopy height derived from GEDI satellite-based LiDAR and an allometric equation based on the allometric theory to estimate mangrove AGB in China in 2019, and the quantitative and spatial distribution of mangrove biomass and their main influencing factors were analyzed. The results showed that the total and mean AGB of mangroves in China in 2019 were about 1,974,827 t and 73.0 t/hm², respectively. Guangdong-Hong Kong-Macao area showed the largest total mangrove AGB, reaching 843,836 t. The mean values of AGB in each province (region) with mangrove ecosystems nationwide ranged from 53.3 to 92.1 t/hm², of which the largest was found in Hainan Province, reaching 92.1 t/hm². In Hainan, Taiwan, and Fujian provinces, mean mangrove AGB was higher than the national mean. Considering nature reserves, the mean AGBs of mangroves in Neilingdingdao-Futian and Mai Po mangrove nature reserves in Shenzhen Bay in the Guangdong-Hong Kong-Macao area and Dongzhaigang mangrove nature reserve in Hainan province were relatively high, with values greater than 110 t/hm². The accumulation and distribution of mangrove AGB in China are affected by latitude and anthropogenic factors. This study provides a comprehensive analysis of mangrove AGB in China based on remote sensing and an allometric equation and can provide a database and technical reference for estimating carbon storage in mangrove ecosystems. It will also contribute to the implementation of ecological restoration and protection measures for coastal mangroves, as well as carbon emission control in China.

Key words: mangrove, remote sensing, aboveground biomass, forest canopy height, allometric equation, China

CLC Number:

S718.5

Xin Wen, Kai Liu, Jingjing Cao, Yuanhui Zhu, Ziyu Wang. Estimation of Mangrove Aboveground Biomass in China Using Forest Canopy Height through an Allometric Equation[J].Tropical Geography, 2023, 43(1): 1-11.

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省份（地区）	总面积/hm²	生物量总量/t	生物量平均值/ （t·hm^-2）
中国	27 053.07	1 974 827	73.0
粤港澳地区	12 013.21	843 836	70.2
广西	8 492.46	559 138	65.8
海南	4 758.28	438 459	92.1
福建	998.64	73 551	73.7
台湾	724.14	56 309	77.8
浙江	66.34	3 534	53.3

名称	省（区）	级别	始建时间	生物量平均值/（t·hm^-2）
东寨港	海南	国家级、国际重要湿地	1980年	110.5
清澜	海南	省级	1981年	93.3
漳江口	福建	国家级、国际重要湿地	1992年	73.4
山口	广西	国家级、国际重要湿地	1990年	80.1
北仑河口	广西	国家级、国际重要湿地	1990年	78.6
淇澳—担杆岛	广东	省级	1989年	99.9
湛江	广东	国家级、国际重要湿地	1990年	66.4
内伶仃岛—福田	广东	国家级	1984年	112.1
米埔	香港	省级、国际重要湿地	1976年	112.1
淡水河口	台湾	省级	1986年	108.6

序号	参考文献	研究区	主要树种	文献研究结果	本文结果
1	Tang 等（2016）	全球	—	全球红树林生物量平均值146.3 t/hm²	—
2	Hu等（2020）	全球	—	全球红树林生物量平均值115.23 t/hm²	—
3	Simard等（2019）	全球	—	全球红树林生物量平均值129.1±87.2 t/hm²；中国红树林生物量总量1 326 934 t；中国红树林生物量平均值为81.7 t/hm²	中国红树林生物量总量为1 974 827 t，平均值为73.0 t/hm²
4	王刚等（2016）	全球（综述）	—	纬度≥20°的红树林生物量最大值341.0 t/hm²，平均值86.87 t/hm²	中国纬度≥20°的红树林生物量最大值283.3，平均值约为73.00 t/hm²
5	Wang 等（2019）	海南省	红海榄、海莲、角果木、榄李、白骨壤、尖叶秋茄、红树、海漆、海桑	海南省红树林生物量总量约为474 199 t，平均值为128.27 t/hm²	海南省红树林生物量总量为 438 459 t，平均值为92.1 t/hm²
6	Zhu 等（2020）	淇澳岛	秋茄、无瓣海桑、桐花树、卤蕨、老鼠簕	2016年淇澳-担杆岛的秋茄生物量平均值为217.89 t/hm²，无瓣海桑生物量平均值为139.20 t/hm²	2019年淇澳—担杆岛的红树林生物量平均值为99.9 t/hm²
7	闻馨（2021）	漳江口保护区核心区	桐花树、秋茄、白骨壤	2020年漳江口保护区核心区红树林生物量总量为 5 200.67 t，平均值为生物量90.37 t/hm²	2019年漳江口保护区核心区的红树林生物量总量为5 340.59 t，平均值为79.8 t/hm²

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Estimation of Mangrove Aboveground Biomass in China Using Forest Canopy Height through an Allometric Equation

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