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Anthropogenic destabilization of sediment carbon pools threatens the long-term climate mitigation potential of temperate seagrass meadows

文献类型：期刊论文

作者Suonan, Zhaxi2,6; Zhang, Fei2,6; Kim, Seung Hyeon1,2; Yue, Shidong3; Jo, Eunhye5; Qin, Le-Zheng2,4; Zhou, Yi3; Lee, Kun-Seop2,6
刊名CATENA
出版日期2026
卷号262页码:14
关键词Anthropogenic impacts Carbon sink Blue carbon ecosystems Decomposition Microbial activity Seagrass meadows
ISSN号0341-8162
DOI10.1016/j.catena.2025.109595
通讯作者Lee, Kun-Seop(klee@pusan.ac.kr)
英文摘要Anthropogenic pressures, including nutrient overloading and physical disturbances, are major drivers of persistent seagrass loss and threaten the blue carbon sink function of seagrass ecosystems. While the role of seagrass meadows in alleviating climate change is widely recognized, the vulnerability of sediment organic carbon (Corg) pools remains poorly understood. Here, we investigate the influence of sediment nutrient enrichment and physical sediment disturbances (sediment reworking, e.g., digging and clamming) on litter decomposition, sediment Corg stocks, microbial extracellular enzyme activities, and bacterial community structure in a temperate Zostera marina meadow. Sediment nutrient enrichment substantially accelerated Z. marina litter decomposition, resulting in 17.3-30.7 % reductions in litter mass, 17.5-30.1 % declines in litter-derived Corg accumulation, and 15.0-17.4 % losses in sediment Corg stocks compared to the control plot (natural condition) after one year. These changes are primarily driven by elevated microbial extracellular enzyme activities and a shift toward copiotrophic bacterial assemblages. Physical sediment disturbances exposed buried Z. marina litter to oxic conditions at the sediment-water interface, promoting its decomposition by 5.8-28.9 % and reducing litter-derived Corg accumulation by 34.6-45.2 %, ultimately intensifying below-ground Corg losses. However, no significant decline in sediment Corg stocks was observed in physically disturbed sediments, likely due to the limited frequency and intensity of the disturbances. Nevertheless, these results still highlight a latent risk of long-term sediment carbon destabilization under chronic or large-scale physical disturbances. Our findings reveal that anthropogenic disturbances substantially weaken the long-term blue carbon sink capacity of seagrass meadows, emphasizing the need to protect sediment carbon pools under growing human and climate pressures to support future climate mitigation efforts.
WOS关键词LEAF-LITTER DECOMPOSITION ; BLUE CARBON ; ZOSTERA-MARINA ; THALASSIA-TESTUDINUM ; ORGANIC-CARBON ; IMPACT ; SEQUESTRATION ; NITROGEN ; SOIL ; STOICHIOMETRY
资助项目Na-tional Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) , Korea government[RS-2024-00344880] ; Na-tional Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) , Korea government[RS-2025-00554096] ; Korea Institute of Marine Science and Technology Promotion (KIMST)[RS-2025-02304428] ; KOREA HYDRO & NUCLEAR POWER CO., LTD[2024-Tech-04]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:001612546700001
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/203797]  
专题海洋研究所_海洋生态与环境科学重点实验室
通讯作者Lee, Kun-Seop
作者单位1.Gyeongsang Natl Univ, Dept Marine Biol & Aquaculture, Tongyeong 53064, South Korea
2.Pusan Natl Univ, Dept Biol Sci, Busan 46241, South Korea
3.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
4.Hainan Univ, Coll Marine Sci, Haikou, Peoples R China
5.Pusan Natl Univ, Dept Microbiol, Busan 46241, South Korea
6.Pusan Natl Univ, Inst Syst Biol, Busan 46241, South Korea
推荐引用方式
GB/T 7714		 Suonan, Zhaxi,Zhang, Fei,Kim, Seung Hyeon,et al. Anthropogenic destabilization of sediment carbon pools threatens the long-term climate mitigation potential of temperate seagrass meadows[J]. CATENA,2026,262:14.
APA Suonan, Zhaxi.,Zhang, Fei.,Kim, Seung Hyeon.,Yue, Shidong.,Jo, Eunhye.,...&Lee, Kun-Seop.(2026).Anthropogenic destabilization of sediment carbon pools threatens the long-term climate mitigation potential of temperate seagrass meadows.CATENA,262,14.
MLA Suonan, Zhaxi,et al."Anthropogenic destabilization of sediment carbon pools threatens the long-term climate mitigation potential of temperate seagrass meadows".CATENA 262(2026):14.

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来源：海洋研究所

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