文献类型：期刊文献

英文题名：Differential degradation pathways of organic matter driven by coastal fronts: Implications for carbon burial efficiency in the Beibu Gulf

作者：Lao, Qibin[1,2,3];Chen, Chunqing[1];Jin, Guangzhe[1,2,3];Lu, Xuan[4];Wang, Chao[1];Chen, Fajin[1,2,3]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, 1,Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Key Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Resources & Environm Continental Shelf Sea & Deep, Key Lab Climate, Zhanjiang 524088, Peoples R China;[4]Jimei Univ, Polar & Marine Res Inst, Coll Harbor & Coastal Engn, Xiamen 361021, Peoples R China

年份：2026

卷号：413

外文期刊名：JOURNAL OF ENVIRONMENTAL MANAGEMENT

收录：SCI-EXPANDED(收录号：WOS:001820624500001)、、EI(收录号：20262721040466)、Scopus(收录号：2-s2.0-105043596684)、WOS

基金：This study was supported by the National Natural Science Foundation of China (42506037, 42576045, 42276047, U1901213), program for scientific research start-up funds of Guangdong Ocean University (060302032502, 080506032608), Youth S&T Talent Support Programme of Guangdong Provincial Association for Science and Technology (SKXRC2025386), College Student Innovation Training Program of Guangdong Ocean University (202310566007).

语种：英文

外文关键词：Ocean front; Decomposition; Organic matter; Marine productivity; Carbon burial; Coastal ecosystem

外文摘要：Coastal fronts create critical transition zones where intensified physical-biological coupling regulates aquatic biogeochemical cycles and ecosystem services. However, mechanistic insights of organic matter (OM) dynamics in response to frontal processes, along with their associated carbon sequestration and potential eco-environmental effects, remain poorly constrained due to a paucity of field observations. This study conducted a systematic investigation of dissolved OM (DOM) characteristics across seasonal cruises, integrating satellite remote sensing data, particulate OM (POM) and physicochemical parameters profiling to elucidate frontal controls on OM dynamics. Our findings demonstrated front-dependent modulation of OM processing pathways. In the high-intensity northern frontal zone, enhanced vertical mixing supplied abundant nutrients, stimulating phytoplankton growth. The dominant OM processing pathway therefore involves the phytoplankton production and subsequent degradation of fresh POM, releasing abundant labile DOM into the water column. By contrast, in the low-intensity eastern frontal zone, despite substantial DOM input via the West-Guangdong Coastal Current (with >40% of the annual input occurring in winter), weak frontal intensity failed to supply adequate nutrients to sustain autochthonous production, shifting the system toward direct microbial degradation of DOM as the primary removal process. These findings demonstrate that frontal activity serves as a hotspot for the dynamic processing of both POM and DOM in the water column, providing insights into how frontal dynamics influence coastal carbon cycling and highlighting the potential vulnerability of carbon sinks under future climate change.