Characteristics of nitrogen forms in the surface sediments of southwestern Nansha Trough, South China Sea

Guoxia Zheng; Jinming Song; Yunming Sun; Jicui Dai; Peng Zhang

doi:10.1007/s00343-008-0280-4

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Characteristics of nitrogen forms in the surface sediments of southwestern Nansha Trough, South China Sea

Updated：2023-05-16

- Characteristics of nitrogen forms in the surface sediments of southwestern Nansha Trough, South China Sea
- Journal of Oceanology and Limnology Vol. 26, Issue 3, Pages: 280-288(2008)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. College of Environment and chemical Engineering Dalian university
- Author bio：
- Funds：
- DOI：10.1007/s00343-008-0280-4
  CLC：
- Online First：20 August 2008，
  
  Published：2008
- Accepted：
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Zheng, G., Song, J., Sun, Y. et al. Characteristics of nitrogen forms in the surface sediments of southwestern Nansha Trough, South China Sea., Chin. J. Ocean. Limnol. 26, 280–288 (2008). https://doi.org/10.1007/s00343-008-0280-4
DOI：

Zheng, G., Song, J., Sun, Y. et al. Characteristics of nitrogen forms in the surface sediments of southwestern Nansha Trough, South China Sea., Chin. J. Ocean. Limnol. 26, 280–288 (2008). https://doi.org/10.1007/s00343-008-0280-4 DOI：

摘要

Abstract

The area of the southwestern Nansha Trough is one of the most productive areas of the southern South China Sea. It is a typical semi-deep sea area of transition from shoal to abyssal zone. To understand distributions and roles of nitrogen forms involved in biogeochemical cycling in this area

contents of nitrogen in four extractable forms: nitrogen in ion exchangeable form (IEF-N)

nitrogen in weak acid extractable form (WAEF-N)

nitrogen in strong alkali extractable form (SAEF-N) and nitrogen in strong oxidation extractable form (SOEF-N)

as well as in total nitrogen content (TN) in surface sediments were determined from samples collected from the cruise in April–May 1999. The study area was divided into three regions (A

B and C) in terms of clay sediment (<4 μm) content at <40%

40%–60% and >60%

respectively. Generally

region C was the richest in the nitrogen of all forms and region A the poorest

indicating that the finer the grain size is

the richer the contents of various nitrogen are. The burial efficiency of total nitrogen in surface sediments was 28.79%

indicating that more than 70% of nitrogen had been released and participated in biogeochemical recycling through sediment-water interface.

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references

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