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
发表期刊SPECTROSCOPY AND SPECTRAL ANALYSIS
卷号35期号:1页码:141-145
摘要The 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.
部门归属LMB
关键词Dissolved Organic Matter Fluorescence Excitation-emission Matrix Spectroscopy (Eems) Seagrass Hainan
学科领域Spectroscopy
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/14902
专题中科院海洋生物资源可持续利用重点实验室
通讯作者farmoon1314@hotmail.com
作者单位1.[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
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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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