珠江口淇澳岛红树林湿地沉积物碳、氮分布研究

江睿; 吴云超; 陈丕茂

doi:10.12131/20200143

珠江口淇澳岛红树林湿地沉积物碳、氮分布研究

doi: 10.12131/20200143

江睿^1,,
吴云超²,
陈丕茂^1, ,

1.
中国水产科学研究院南海水产研究所/农业农村部南海渔业资源环境科学观测实验站/广东省渔业生态环境重点实验室，广东广州 510300
2.
中国科学院南海海洋研究所热带海洋生物资源与生态重点实验室，广东广州 510301

基金项目: 中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金资助 (2018YB03)；中国科学院热带海洋生物资源与生态重点实验室、广东省海洋药物重点实验室、广东省应用海洋生物学重点实验室联合资助开放基金课题 (LMB20191003)

详细信息

作者简介:
江睿：江　睿 (1989—)，女，博士，助理研究员，从事海洋生态学研究。E-mail: jr1017241007@126.com

通讯作者:
陈丕茂 (1969—)，男，研究员，从事渔业资源保护与利用研究。E-mail: chenpm@scsfri.ac.cn

中图分类号: X 171.1
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- 被引次数: 0
出版历程
- 收稿日期: 2020-07-15
- 修回日期: 2020-08-31
- 网络出版日期: 2020-12-25

Study on distribution of sediment carbon and nitrogen in mangrove wetland of Qi'ao Island, Pearl River Estuary

Rui JIANG^1
,,
Yunchao WU²,
Pimao CHEN^{1
, ,}

1.
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Scientific Observing and Experimental Station of South China Sea Fishery Resources and Environment, Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Guangzhou 510300, China
2.
South China Sea Institute of Oceanology, Chinese Academy of Sciences/Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangzhou 510301, China

摘要

摘要: 为了对珠江口红树林湿地沉积物有机质有更为全面、深入的认识，以珠江口淇澳岛红树林湿地为对象，对其沉积物有机碳 (TOC) 和总氮 (TN) 的含量分布、储量及来源进行了研究。结果表明，淇澳岛7种主要红树 [ 秋茄 (Kandelia candel)、无瓣海桑 (Sonneratia opetala)、桐花 (Aegiceras corniculatum)、木榄 (Bruguiera gymnorhiza)、卤蕨 (Acrostichum aureum)、老鼠簕 (Acanthus ilicifolius)、海漆 (Excoecaria agallocha)] 群落表层沉积物TOC质量分数介于1.125%~1.969%，TN质量分数介于0.058%~0.136%。其中秋茄林内TOC含量最高，无瓣海桑林缘TOC含量最高，而木榄林内、林缘TOC含量均最低，且各红树群落TOC含量均呈林内大于林缘的特征。表层沉积物碳氮比 (C/N) 为12.032~26.690，显示出高等植物对其有机质组成具有较高的贡献率，其中植被内源有机碳的平均贡献率约为70.21%。受土地利用变化等因素的影响，0~30 cm层沉积物的TOC和TN含量均呈现出波动变化的趋势。0~30 cm层沉积物有机碳储量 (SOC) 介于56.83~69.54 t·hm⁻²，显示出淇澳岛红树林湿地较强的有机碳埋藏能力。
- 红树林 /
- 沉积物 /
- 碳氮储量 /
- 淇澳岛
Abstract: In order to have a deep and thorough understanding of sediment organic matter in mangrove wetland of the Pearl River Estuary, we analyzed the distribution, stocks and source of soil organic carbon (TOC) and total nitrogen (TN) of the mangrove wetland in Qi'ao Island. The results show that the TOC content in the surficial sediment of seven main mangrove communities (Kandelia candel, Sonneratia opetala, Aegiceras corniculatum, Bruguiera gymnorhiza, Acrostichum aureum, Acanthus ilicifolius, Excoecaria agallocha) was 1.125%−1.969%, and the TN content was 0.058%−0.136%. Among the seven main mangrove communities, K. candel had the highest TOC content of inner forest, while S. opetala had the highest TOC content of forest edge. The lowest TOC contents of inner and edge both appeared in B. gymnorhiza communities. Moreover, the TOC content of inner forest was always higher than that of edge. The C/N of the surficial sediment was 12.032−26.690, showing that higher plants have a higher contribution rate to its organic matter composition. According to the C/N bivariate mixture model, about 70.21% of TOC input came from endogenous input of vegetation. Affected by factors such as land use change, TOC and TN content fluctuated in 0−30 cm soil layer. The storage of organic carbon (SOC) was 56.83−69.54 t·hm⁻², showing the strong TOC storage ability of this mangrove wetland in Qi'ao Island.
- Mangrove forest /
- Sediment /
- Storage of TOC and TN /
- Qi'ao Island

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图 1 采样站点分布

Figure 1. Sampling site

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图 2 7种红树群落表层沉积物有机碳、氮平均含量

Figure 2. Average contents of TOC and TN in surface sediments of seven mangrove communities

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图 3 7种红树群落表层沉积物有机碳、总氮含量分布

Figure 3. Distribution of TOC and TN contents in surface sendiments of seven mangrove communities

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图 4 淇澳岛红树林湿地沉积物中有机碳、总氮含量垂直分布图

Figure 4. Vertical distribution of TOC and TN contents in sediment of mangrove wetland of Qi'ao Island

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图 5 淇澳岛红树林湿地沉积物中碳氮比垂直分布图

Figure 5. Vertical distribution of C/N in sediment of mangrove wetland of Qi'ao Island

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图 6 7种红树群落表层沉积物有机碳、氮储量

Figure 6. SOC and STN stocks of surface sediments of seven mangrove communities

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表 1 淇澳岛红树林湿表层沉积物理化性质

Table 1. Physical and chemical properties of surface sediment in mangrove wetland of Qi'ao Island

红树种类 Mangrove species	含水率 Moisture content/%	容重 Bulkdensity/(g·cm⁻³)
秋茄 K. candel	64.14±1.8	1.24±0.089
老鼠簕 A. ilicifolius	70.39±2.2	1.26±0.046
无瓣海桑 S. opetala	69.94±6.8	1.23±0.130
桐花 A. corniculatum	75.21±12.9	1.13±0.184
卤蕨 A. aureum	70.76±1.6	1.26±0.046
海漆 E. agallocha	65.97±5.4	1.13±0.097

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表 2 淇澳岛红树林湿地垂直分层沉积物理化性质

Table 2. Physical and chemical properties of sediment core in mangrove wetland of Qi'ao Island

柱状样 Sediment core/cm	含水率 Moisture content/%	容重 Bulkdensity/(g·cm⁻³)
0~3	64.43±4.6	1.34±0.067
3~6	64.73±6.9	1.30±0.065
6~9	63.65±8.9	1.25±0.077
9~12	66.40±4.4	1.26±0.055
12~15	63.93±12.6	1.27±0.124
15~18	62.76±14.0	1.27±0.147
18~21	67.08±2.3	1.25±0.080
21~24	68.35±6.2	1.23±0.169
24~27	73.89±1.3	1.17±0.121
27~30	68.90±9.6	1.27±0.129

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表 3 不同区域湿地沉积物中有机质含量对比

Table 3. Comparison of organic matter in wetland sediments in different regions

研究区域　　　　　　　　 Survey area	有机碳质量分数 TOC/%	总氮质量分数 TN/(mg·g⁻¹)	数据来源 Data source
淇澳岛红树林湿地 Mangrove wetland in Qi'ao Island	0.92~2.26	0.60~1.43	本研究
深圳福田红树林湿地 Futian Mangrove wetland of Shenzhen	约1.42	1.40~1.60	[2]
广西珍珠湾红树林湿地 Mangrove wetland in Zhenzhu Gulf, Guangxi	1.43~2.21	0.62~1.03	[24]
九龙江口红树林湿地 Mangrove wetland in Jiulong River Estuary	1.24~3.81	1.19~2.05	[26]
法国Albert湖泊 Lake Albert, French	4.33~5.31	−	[32]
巴西南部红树林湿地 Mangrove wetland, South Brazil	2.7~6.1	−	[32]
美国Massachusetts湿地 Massachusetts wetland in America	5.6~36.7	0.80~1.80	[33]
长江口湿地 Yangtze River Estuary	0.1~0.7	0.14~0.78	[34]
苏北潮滩湿地 Tidal flat in northern Jiangsu Province	0.16~0.9	0.19~2.68	[34]
漳江口红树林湿地 Mangrove wetland in Zhangjiang Estuary	0.91~2.86	0.25~2.21	[35]
法国Guiana红树林湿地 Guiana mangrove wetland, French	0.70~1.90	0.10~1.30	[36]
荷兰西谢尔德河口 Westerschelde Estuary	1.19~2.33	0.8~0.15	[37]
广西大冠沙红树林湿地 Daguansha mangrove wetland, Guangxi	2.26±1.84	0.45±0.34	[38]

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