| 引用本文： |
-
黄中坚,何斌源,马日宇,龙云宇,张桂顺,韦兆富,张绍军.广西茅尾海红树林生态系统碳库特征及其与沉积环境的耦合机制[J].广西科学,2026,33(2):258-269. [点击复制]
- HUANG Zhongjian,HE Binyuan,MA Riyu,LONG Yunyu,ZHANG Guishun,WEI Zhaofu,ZHANG Shaojun.Characteristics of Mangrove Ecosystem Carbon Stocks and Their Coupling Mechanism with Sedimentary Environments in the Maowei Sea,Guangxi[J].Guangxi Sciences,2026,33(2):258-269. [点击复制]
|
|
| |
|
|
| 本文已被：浏览 106次 下载 24次 |
码上扫一扫！ |
| 广西茅尾海红树林生态系统碳库特征及其与沉积环境的耦合机制 |
|
黄中坚1,2,3, 何斌源1,2,3, 马日宇1,2,3, 龙云宇1,2,3, 张桂顺1,2,3, 韦兆富1,2,3, 张绍军1,2,3
|
|
|
| (1.广西壮族自治区海洋研究院, 广西南宁 530022;2.自然资源部广西海洋检测中心, 广西南宁 530022;3.广西壮族自治区海洋灾害应急中心, 广西南宁 530022) |
|
| 摘要: |
| 红树林是关键的海岸带蓝碳生态系统，但在半封闭海湾低能环境下，不同群落类型的碳库分配及其沉积驱动机制尚不明确。本研究以广西茅尾海为研究对象，调查桐花树(Aegiceras corniculatum)、秋茄(Kandelia obovata)、无瓣海桑(Sonneratia apetala)纯林及其与白骨壤(Avicennia marina)混交林共7种群落类型的植被生物量与沉积物(0—100 cm)的理化性质。结果显示，研究区红树林生态系统碳密度为139.33—342.93 Mg C/hm2，表现出显著的空间异质性；其中沉积物碳库是核心组分，占比77.2%—87.3%，而凋落物层贡献率不足1%。混合群落(如桐花树＋秋茄混交林)展现出比单一优势种群落更高的碳库水平，表现出明显的群落优势。沉积物以细颗粒组分为主，有机碳(SOC)在20—50 cm中深层出现明显富集现象。相关性分析表明，植被地下生物量(BGB)与沉积物有机碳含量具有正相关性，泥质生境较砂质生境具有更强的碳富集能力，二者共同揭示了“高生物量输入(尤其是根系)＋泥质生境物理封存”的双重耦合作用是导致该区域深层存在高碳库的主要机制。本研究提供了平陆运河开通前的关键碳库本底数据，推测运河通航引发的船行波增强及水动力改变可能对现有的沉积物稳定性产生潜在影响，建议加强对航道沿岸蓝碳的长期监测。 |
| 关键词: 红树林 生态系统碳储量 沉积物有机碳 群落结构 平陆运河 茅尾海 |
| DOI：10.13656/j.cnki.gxkx.20260603.005 |
| 投稿时间：2026-01-15修订日期：2026-03-13 |
| 基金项目:国家自然科学基金项目(42366009)和自然资源部2024年度部省合作项目(2024ZRBSHZ100)资助。 |
|
| Characteristics of Mangrove Ecosystem Carbon Stocks and Their Coupling Mechanism with Sedimentary Environments in the Maowei Sea,Guangxi |
|
HUANG Zhongjian1,2,3, HE Binyuan1,2,3, MA Riyu1,2,3, LONG Yunyu1,2,3, ZHANG Guishun1,2,3, WEI Zhaofu1,2,3, ZHANG Shaojun1,2,3
|
| (1.Guangxi Academy of Oceanography, Nanning, Guangxi, 530022, China;2.Guangxi Marine Testing Center, Ministry of Natural Resources, Nanning, Guangxi, 530022, China;3.Guangxi Marine Disaster Emergency Center, Nanning, Guangxi, 530022, China) |
| Abstract: |
| Mangroves are key coastal blue carbon ecosystems.However,the carbon stock allocation among different community types and their sedimentary driving mechanisms in semi-closed,low-energy bays remain unclear.This study focused on the Maowei Sea in Guangxi(the estuary of the Pinglu Canal)to investigate the vegetation biomass and sediment physicochemical properties (0-100 cm) of seven mangrove community types,including,Aegiceras corniculatum,Kandelia obovata,Sonneratia apetala,Avicennia marina and their mixed forests.The results showed that the ecosystem carbon densities in the study area ranged from 139.33 to 342.93 Mg C/hm2,exhibiting significant spatial heterogeneity.The sediment carbon stocks were the dominant component,accounting for 77.2% to 87.3% of the total stock,while the contribution of the litter layer was less than 1%.Mixed forest communities(e.g.,Aegiceras corniculatum＋K.obovata)demonstrated higher carbon storage capacities than pure forests,indicating a clear community advantage.Sediments were dominated by fine-grained fractions,and organic carbon (SOC) showed significant subsurface enrichment in the 20-50 cm soil layer.Correlation analysis revealed a positive correlation between belowground biomass (BGB) and sediment organic carbon densities,and muddy habitats had stronger carbon enrichment capacity than sandy habitats.This reveals that the coupling mechanism of high biomass community input (especially roots)+physical sequestration in fine-grained muddy habitats is the primary driver maintaining deep soil carbon stocks in this area.This study provides key baseline data before the opening of the Pinglu Canal.It is hypothesized that the enhanced ship-induced waves and hydrodynamic changes caused by canal navigation may affect sediment stability.Therefore,long-term monitoring of blue carbon stability along the channel is recommended. |
| Key words: mangrove ecosystem carbon stock sediment organic carbon community structure Pinglu Canal Maowei Sea |
|
|
|
|
|
