文献类型：期刊文献

英文题名：Contrasting short-term changes in nutrients and dissolved organic matter in groundwater and surface water on a coastal island following Super Typhoon Yagi

作者：Wang, Chao[1,2,4,5,6];Jiao, Junpeng[1,6];Wang, Xin[2];Jin, Guangzhe[1,4,5];Huang, Peng[1,4,5];Jiang, Kuan[1,6];Lei, Xuetie[3];Kong, Deming[1,4,5]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang, Peoples R China;[2]Minist Ecol & Environm Peoples Republ China, Key Lab Water Environm Simulat & Pollut Control, Guangzhou, Peoples R China;[3]Minist Nat Resources Peoples Republ China, Beihai Marine Ctr, Beihai, Peoples R China;[4]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China;[5]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental S, Zhanjiang, Peoples R China;[6]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang, Peoples R China

年份：2026

卷号：221

外文期刊名：MARINE ENVIRONMENTAL RESEARCH

收录：SCI-EXPANDED(收录号：WOS:001847576600001)、、EI(收录号：20263221268413)、Scopus(收录号：2-s2.0-105046716912)、WOS

基金：This study was supported by the Open Fund of The Key Laboratory of Water Environment Simulation and Pollution Control, Ministry of Ecology and Environment of the People's Republic of China (Grant No. WESPC202405), the Tropical Ocean Environment in Western Coastal Waters Observation and Research Station of Guangdong Province (Grant No. 2024B1212040008), the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2022A1515110946), and the scientific research start-up fund of Guangdong Ocean University (Grant No. 060302032009).

语种：英文

外文关键词：Donghai island; Groundwater; Surface pond water; Nutrient; Dissolved organic matter; Super typhoon Yagi

外文摘要：Groundwater on coastal islands is an important water source for human activities and may influence nutrient and carbon cycling in adjacent marginal seas. However, its short-term response to extreme climate events remains poorly understood. Here, 19 groundwater and 4 surface pond-water samples were collected on Donghai Island, South China, before and within 3-5 days after Super Typhoon Yagi (No. 2411). Nutrients, dissolved organic carbon (DOC), chromophoric and fluorescent dissolved organic matter (CDOM and FDOM), together with elevation and land-use data, were analyzed using correlation, regression, and paired tests. Before the typhoon, groundwater showed high concentrations of NO3--N (633.62 +/- 555.10 & micro;mol/L) and DSi (354.20 +/- 254.96 & micro;mol/ L) but low SRP (5.96 +/- 15.17 & micro;mol/L) and DOC (0.69 +/- 0.48 mg/L). The associations of NO3--N with cultivated land, SRP with elevation and forest cover, and DOC and humic-like DOM with wetland-influenced lowland settings suggest that groundwater had a pre-existing hydrochemical and DOM framework shaped by landscape setting, land-use effects, and subsurface processes, against which short-term post-typhoon changes were superimposed. In contrast, surface pond water had lower NO3--N (62.67 +/- 124.07 & micro;mol/L) and DSi (150.27 +/- 90.30 & micro;mol/L), but much higher DOC (9.49 +/- 4.61 mg/L), indicating a more hydrologically open and DOM-rich system. After the typhoon, groundwater showed limited paired changes in most nutrients, small increases in DOC (+13.0%) and humic-like FDOM (C3; +4.9%), and convergence of selected nutrient and protein-like FDOM high-value features. Surface pond water showed larger post-typhoon changes, including increased salinity (+111.1%) and NO3--N (+156.1%), decreased DSi (-20.5%), DOC (-19.5%), and protein-like FDOM (-36.7% and-57.1%). Meanwhile, DOM composition shifted toward relatively more aromatic and humified characteristics, as reflected by increases in specific UV absorbance at 350 nm (SUVA350; +39.1%) and the humification index (HIX; +38.3%), together with stronger DOC-CDOM-FDOM coupling. These results indicate contrasting short-term changes in hydrochemistry and DOM composition between groundwater and surface pond water.