Chemical characterization and composition of dissolved organic matter in Jiaozhou Bay

Yanping Zhang; Guipeng Yang; Yan Chen

doi:10.1007/s00343-009-9020-7

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Chemical characterization and composition of dissolved organic matter in Jiaozhou Bay

Updated：2023-05-16

- Chemical characterization and composition of dissolved organic matter in Jiaozhou Bay
- Journal of Oceanology and Limnology Vol. 27, Issue 4, Pages: 851-858(2009)
- Affiliations：
  
  Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education College of Chemistry and Chemical Engineering Ocean University of China
- Author bio：
- Funds：
- DOI：10.1007/s00343-009-9020-7
  CLC：
- Online First：04 December 2009，
  
  Published：2009
- Accepted：
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Zhang, Y., Yang, G. & Chen, Y. Chemical characterization and composition of dissolved organic matter in Jiaozhou Bay., Chin. J. Ocean. Limnol. 27, 851–858 (2009). https://doi.org/10.1007/s00343-009-9020-7
DOI：

Zhang, Y., Yang, G. & Chen, Y. Chemical characterization and composition of dissolved organic matter in Jiaozhou Bay., Chin. J. Ocean. Limnol. 27, 851–858 (2009). https://doi.org/10.1007/s00343-009-9020-7 DOI：

摘要

Abstract

Biologically utilizable dissolved organic compounds

including dissolved organic carbon (DOC)

dissolved carbohydrates (DCHO) and dissolved free amino acids (DFAA) were analyzed in filtered surface seawater samples collected at 19 stations in Jiaozhou Bay

China

on June 3

2007. In these samples

concentrations of DOC

dissolved free carbohydrates (DFCHO)

dissolved combined carbohydrates (DCCHO)

total dissolved carbohydrates (TDCHO) and total dissolved free amino acids (TDFAA) ranged from 141.7 to 191.1 µmol C/L

1.98 to 18.18 µmol C/L

5.04 to 24.90 µmol C/L

14.52 to 30.36 µmol C/L

and 1.83 to 11.89 µmol C/L

respectively. As a major component of the dissolved carbohydrates

the concentrations of DCCHO were about three times higher than those of DFCHO. Three major constituents of the DFAA were threonine (23.0±5.7 mol%)

glutamic acid (16.6±3.2 mol%) and arginine (9.1±3.3 mol%). Based on the composition of DFAA

a molar C:N ratio of 3.60±0.75 in DFAA was derived

indicating longer carbon chains in the amino acids. DCCHO (8.1%) was the most abundant fraction of DOM in most samples

followed by DFCHO (4.8%) and TDFAA (2.7%). These DOM concentrations displayed a decreasing trend from the coast to the central region. Significant correlations were found between the DCCHO and DFCHO concentrations (r=-0.724

n=19

P<0.001) and the DCCHO and TDCHO concentrations (r=0.506

n=19

P=0.027).

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references

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