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Seasonal variability of distribution and mixing behavior of chromophoric dissolved organic matter in the Changjiang River Estuary and adjacent areas
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Li’na Xie1, 2, Bin Zhou3, Meng Liu1, 2, Lin Yang1, 2, Guipeng Yang1, 2, Jing Zhang1, 2, *
Haiyang Xuebao | 2021, 43(4) : 27 - 45
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Haiyang Xuebao | 2021, 43(4): 27-45
• Article •
Seasonal variability of distribution and mixing behavior of chromophoric dissolved organic matter in the Changjiang River Estuary and adjacent areas
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Li’na Xie1, 2, Bin Zhou3, Meng Liu1, 2, Lin Yang1, 2, Guipeng Yang1, 2, Jing Zhang1, 2, *
Affiliations
  • 1College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
  • 2Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
  • 3Marine Engineering Prospecting Institute of North China Sea, State Oceanic Administration, Qingdao 266061, China
Published: 2021-04-25 doi: 10.12284/hyxb2021014
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The distribution and mixing behavior of chromophoric dissolved organic matter (CDOM) in the Changjiang River Estuary and adjacent areas were analyzed in March, July and October of 2019. Through discussing the salinity, absorption spectral slope S275-295, absorption coefficient aCDOM(355) and Chl a, it was shown that the terrestrial input and aCDOM(355) had the highest value in July; aCDOM(355) was affected by terrestrial input and phytoplankton production activities in March, and the value in March was higher than that in October in the Changjiang River Estuary low salinity area. In addition, in high-salt offshore regions, aCDOM(355) was similar in March and July, and both were lower than that in October, these distribution of CDOM was mainly influenced by phytoplankton production activities. Four fluorescent components of CDOM were identified by EEMs-PARAFAC technique: one protein-like component C1 (280/330 nm) and three humic-like components C2 (300/350 nm), C3 (260/465 nm) and C4 (320/410 nm) respectively. Four fluorescent components declined from the inside to the outside of the Changjiang River Estuary in March, July and October. Affected by terrestrial input and phytoplankton production activities, the seasonal variation of the average fluorescence intensity from large to small was July, October and March. The fluorescence components of CDOM deviated from the theoretical dilution line in these three seasons. It showed that CDOM source (terrestrial input, sediment resuspension and on-site biological activities) and sink (adsorption of particulate matter, photodegradation and bacterial degradation) were complex and variable, revealing the non-conservative mixed behavior of CDOM in the Changjiang River Estuary.

chromophoric dissolved organic matter (CDOM)  /  fluorescence spectrum  /  absorption spectrum  /  the Changjiang River Estuary and adjacent areas  /  seasonal variation
Li’na Xie, Bin Zhou, Meng Liu, Lin Yang, Guipeng Yang, Jing Zhang. Seasonal variability of distribution and mixing behavior of chromophoric dissolved organic matter in the Changjiang River Estuary and adjacent areas[J]. Haiyang Xuebao, 2021 , 43 (4) : 27 -45 . DOI: 10.12284/hyxb2021014
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Year 2021 volume 43 Issue 4
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Article Info
doi: 10.12284/hyxb2021014
  • Receive Date：2020-06-16
  • Online Date：2026-02-26
  • Published：2021-04-25
Article Data
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History
  • Received：2020-06-16
  • Revised：2020-08-07
Funding
Affiliations
    1College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
    2Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
    3Marine Engineering Prospecting Institute of North China Sea, State Oceanic Administration, Qingdao 266061, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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