浙南海岸带人工秋茄(Kandelia obovata)红树林与互花米草(Spartina alterniflora)盐沼土壤碳汇对比研究

doi:10.11978/2024052

热带海洋学报 ›› 2025, Vol. 44 ›› Issue (1): 172-181.doi: 10.11978/2024052CSTR: 32234.14.2024052

浙南海岸带人工秋茄(Kandelia obovata)红树林与互花米草(Spartina alterniflora)盐沼土壤碳汇对比研究

吴雪¹^,²(), 赵鑫¹^,²(), 辜伟芳¹^,², 朱科桦³, 葛振鸣³

1.浙江省海洋科学院, 浙江杭州 310012
2.自然资源部海洋空间资源管理技术重点实验室, 浙江杭州 310012
3.华东师范大学河口海岸学国家重点实验室, 上海 200241

收稿日期:2024-03-07 修回日期:2024-04-17 出版日期:2025-01-10 发布日期:2025-02-10
通讯作者: 赵鑫
作者简介:
吴雪(1993—), 女, 研究生, 研究方向为海洋生态学。email: 13478659432@163.com
基金资助:
国家质量基础设施体系专项海洋生态监测 NQI 研究成果集成示范应用(2023YFF0611804); 浙江省自然资源厅科技计划项目(2022-42); 浙江省领雁研发攻关计划项目(2022C03G1253994)

Comparative study on soil carbon sinks of artificial Kandelia obovate mangrove and Spartina alterniflora salt marsh in the southern Zhejiang coastal zone

WU Xue¹^,²(), ZHAO Xin¹^,²(), GU Weifang¹^,², ZHU Kehua³, GE Zhenming³

1. Marine Academy of Zhejiang Province, Hangzhou 310012, China
2. Key Laboratory of Ocean Space Resource Management Technology, Ministry of Natural Resources, Hangzhou 310012, China
3. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China

Received:2024-03-07 Revised:2024-04-17 Online:2025-01-10 Published:2025-02-10
Contact: ZHAO Xin
Supported by:
Integrated Demonstration Application of NQI Research Results in Marine Ecological Monitoring of Research Program of National Quality Infrastructure System(2023YFF0611804); Science and Technology Planning Project of Zhejiang Provincial Department of Natural Resources(2022-42); "Leading Goose" R&D Program of Zhejiang(2022C03G1253994)

摘要/Abstract

摘要：

滨海湿地修复是提升海岸带蓝碳生态系统碳汇功能的重要举措。浙江省持续开展了大规模的红树林引种造林工程, 然而, 人工种植红树林后湿地固碳能力及其影响因素尚不清晰。本研究以乐清湾人工种植红树林(秋茄Kandelia obovata)为对象, 研究了不同林龄土壤有机碳含量、单位面积碳储量及其垂直分布特征, 并与互花米草(Spartina alterniflora)盐沼和淤泥质光滩进行比较。结果表明,成林红树林土壤有机碳含量和储量最高, 且红树林和盐沼生境土壤有机碳含量和储量均显著高于光滩。互花米草盐沼土壤有机碳含量高于幼林红树林, 但由于互花米草盐沼土壤容重显著低于幼林红树林, 因此, 幼林红树林土壤有机碳储量略高于互花米草盐沼。不同生境土壤有机碳含量和储量都呈现随土壤深度先升高后下降的分布特征, 一般在20~50cm深度最高。采样区域和生境类型差异对土壤有机碳含量和储量影响显著, 并有显著的交互作用。孔隙水溶解氧、土壤总氮、土壤pH和孔隙水盐度与土壤有机碳含量呈显著正相关关系。本研究结果可为评估浙江省红树林北移后的固碳潜力以及湿地功能提升提供科学依据与数据支撑。

关键词: 滨海湿地, 红树林, 外来植物, 土壤有机碳, 碳储量

Abstract:

Coastal wetland restoration is an important measure to improve the blue carbon function in the coastal zone. Zhejiang Province has continuously carried out a series of large-scale mangrove introduction and afforestation projects. Yet, the carbon sink capacity and influence of factors for the high-latitude artificial mangroves still remain unclear. In this study, the soil organic carbon (SOC) content, organic carbon stock per unit area and their vertical distribution characteristics of the Kandelia obovata forests with different ages were investigated. The SOC content and stock in the mangroves were also compared with the Spartina alterniflora salt marsh and bare mudflat. The results showed that the SOC content and stock were the highest in the adult mangroves. The SOC content and stock in both mangroves and salt marshes were significantly higher than those in the mudflat. The SOC content in salt marshes was higher than that in the young mangroves, but due to the significant lower bulk density of Spartina alterniflora salt marsh soils compared to young mangrove forests, the SOC stock in the young mangroves was slightly higher than that of salt marshes. The SOC content and stock in the different habitats showed the distribution characteristics of first increasing and then decreasing with the soil depth, reaching the highest values at the soil depth of 20~50 cm. Site location and habitat type had a significant relationship with SOC content and stock, with significant interaction between site location and habitat type. Dissolved oxygen in pore water, soil total nitrogen, soil pH and pore water salinity were significantly associated with the SOC content. The results of this study can provide scientific basis and data support for assessing the carbon sequestration potential of artificial mangrove forests after northward migration, as well as wetland protection and restoration strategy.

Key words: coastal wetland, mangrove, exotic plants, soil organic carbon, carbon stock

中图分类号:

P734.5

吴雪, 赵鑫, 辜伟芳, 朱科桦, 葛振鸣. 浙南海岸带人工秋茄(Kandelia obovata)红树林与互花米草(Spartina alterniflora)盐沼土壤碳汇对比研究[J]. 热带海洋学报, 2025, 44(1): 172-181.

WU Xue, ZHAO Xin, GU Weifang, ZHU Kehua, GE Zhenming. Comparative study on soil carbon sinks of artificial Kandelia obovate mangrove and Spartina alterniflora salt marsh in the southern Zhejiang coastal zone[J]. Journal of Tropical Oceanography, 2025, 44(1): 172-181.

图/表 7

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主效应/交互作用组别	df	F(SOC含量)	F(SOC储量)
季节	1	0.02^ns	0.324^ns
区域	4	7.024**	27.448**
类型	3	41.480**	35.406**
季节×区域	4	1.205^ns	1.340^ns
类型×季节	3	2.882*	2.763*
区域×类型	12	2.699*	3.109*
季节×区域×类型	12	1.346^ns	1.253^ns

季节	生境类型	pH (无量纲)	DO/(mg·L^-1)	Sal/‰	SSC/(g·kg^-1)	TN/(g·kg^-1)	TP/(mg·kg^-1)
春季	成林红树林	7.66±0.15^a	3.31±1.50^b	21.82±2.99^a	29.63±6.79^a	1.07±0.08^ab	688.82±25.46^a
	幼林红树林	7.65±0.22^a	4.72±1.53^a	21.69±4.49^a	26.33±2.89^a	1.10±0.13^ab	699.64±38.15^a
	互花米草盐沼	7.64±0.32^a	3.51±1.88^b	22.79±4.22^a	27.15±4.68^a	1.17±0.09^a	700.55±36.49^a
	光滩	7.59±0.24^a	3.36±2.11^b	23.54±2.47^a	26.86±4.50^a	1.03±0.09^b	701.26±27.07^a
秋季	成林红树林	7.33±0.18^a	4.28±2.54^b	29.42±1.87^a	37.67±13.57^a	1.18±0.15^a	638.70±12.64^a
	幼林红树林	7.55±0.24^a	5.25±2.53^a	28.76±2.39^a	34.73±10.50^a	1.05±0.07^ab	632.82±11.98^a
	互花米草盐沼	7.29±0.18^a	2.63±2.50^c	29.72±3.97^a	33.34±16.63^a	1.08±0.09^ab	650.79±43.09^a
	光滩	7.49±0.24^a	4.50±2.84^b	29.66±1.26^a	33.56±11.93^a	0.99±0.06^b	629.80±14.05^a

浙南海岸带人工秋茄(Kandelia obovata)红树林与互花米草(Spartina alterniflora)盐沼土壤碳汇对比研究

Comparative study on soil carbon sinks of artificial Kandelia obovate mangrove and Spartina alterniflora salt marsh in the southern Zhejiang coastal zone

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