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The Fluorescence Characteristics of Dissolved Organic Matter (DOM) in the Seagrass Ecosystem from Hainan by Fluorescence Excitation-Emission Matrix Spectroscopy
Cheng Yuan-yue1; Wang Shuai-long1; Hu Shui-bo1; Zhou Chen-yuan1; Shi Zhen1; Li Qian1; Huang Xiao-ping1; farmoon1314@hotmail.com
2015
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
Volume35Issue:1Pages:141-145
AbstractThe fluorescence characteristics of dissolved organic matter (DOM) were determined in the seagrass ecosystem collected in Xincun Bay of Hainan Island in late January, 2013, using fluorescence excitation-emission matrix spectroscopy (EEMs). EEMs spectra showed 2 types of fluorescence signals in DOM samples, three humic-like fluorescence peaks and two protein-like fluorescence peaks, respectively. The former included UVC peak A (Ex/Em: 230/430 nm) UVA peak C (Ex/Em: 350/440 nm), and UVA peak M (Ex/Em: 300/380,similar to 400 nm), while the latter included tryptophan-like peaks R (Ex/Em: 230/355 375 nm) and N (Ex/Em: 280 similar to 300/365 similar to 380 run). Peak N was more like a combination of Peak M and Peak R. Moreover, free tyrosine-like molecules in DOM from the seagrass-beds ecosystem did not exist because the tyrosine-like fluorescence was not found. There were significant positive correlations of peak N with M and R (0. 97 and 0. 54 for R-2, respectively), and peak A with C (0. 86 for R-2), showing their same sources and biogeochemical behaviors. The change law of mean fluorescence intensities of those fluorescence signals was R (0. 304 RU) >A (0. 194 RU) >M (0. 147 RU) >N (0. 125 RU) >C (0. 051 RU). And, higher center dot L-1 concentrations of all the fluorescence occurred in the coastal waters inshore, with low values in two small regions located in the southwest and southeast of the bay where the seagrasses flourished. The distributions of those fluorescence signals in Xincun Bay suggested that the dynamics responsible for the humic-like fluorescence might be the same as that responsible for the protein-like fluorescence. The high fluorescence index (F1: 1. 81), high biological index (BIX: 1. 44) and low humification index (HDCa: 4. 2 and HIX13: 0. 81) showed that the DOM from the seagrass-dominant ecosystem has a strong autochthonous contribution and poor humification degree. The results clearly suggested that the DOM in this region has a rather unique fluorescence characteristic and is quite different from other aquatic environments.
DepartmentLMB
KeywordDissolved Organic Matter Fluorescence Excitation-emission Matrix Spectroscopy (Eems) Seagrass Hainan
Subject AreaSpectroscopy
URL查看原文
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/14902
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authorfarmoon1314@hotmail.com
Affiliation1.[Cheng Yuan-yue
2.Wang Shuai-long
3.Hu Shui-bo
4.Zhou Chen-yuan
5.Shi Zhen
6.Li Qian
7.Huang Xiao-ping] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
8.[Wang Shuai-long
9.Hu Shui-bo
10.Zhou Chen-yuan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Cheng Yuan-yue,Wang Shuai-long,Hu Shui-bo,et al. The Fluorescence Characteristics of Dissolved Organic Matter (DOM) in the Seagrass Ecosystem from Hainan by Fluorescence Excitation-Emission Matrix Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2015,35(1):141-145.
APA Cheng Yuan-yue.,Wang Shuai-long.,Hu Shui-bo.,Zhou Chen-yuan.,Shi Zhen.,...&farmoon1314@hotmail.com.(2015).The Fluorescence Characteristics of Dissolved Organic Matter (DOM) in the Seagrass Ecosystem from Hainan by Fluorescence Excitation-Emission Matrix Spectroscopy.SPECTROSCOPY AND SPECTRAL ANALYSIS,35(1),141-145.
MLA Cheng Yuan-yue,et al."The Fluorescence Characteristics of Dissolved Organic Matter (DOM) in the Seagrass Ecosystem from Hainan by Fluorescence Excitation-Emission Matrix Spectroscopy".SPECTROSCOPY AND SPECTRAL ANALYSIS 35.1(2015):141-145.
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