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:: Volume 4, Issue 13 (Journal of the Persian Gulf (Marine Science) 2013) ::
JPG 2013, 4(13): 31-37 Back to browse issues page
Organic Carbon and Organic Matter Levels in Sediments of the Strait of Hormoz, the Persian Gulf
Homira Agah , Shirin Rahmanpour , Neda Sheijooni Fumani
Iranian National Institute for Oceanography and Atmospheric Sciences
Abstract:   (44707 Views)
Total organic carbon has a major influence on both the chemical and biological processesthat take place in sediments. Algal bloom is one of the organic carbon levels in aquatic ecosystems. In 2009 algal bloom occurred in the Hormozgan province and prolonged for months, which finally setteled down in 2010. In this study the variations of total organic carbon (TOC), organic matter (TOM) and total nitrogen (TN) contents, and the carbon-nitrogen ratio in superficial sediments collected from 33 stations at the Strait of Hormuz were investigated. Sampling was performed at the depths of 14 to 59 meters in spring of 2010 after sinking algal bloom in the area.The TOC content in the surface sediments revealed values in the range of 0.5 up to 3.5 % (mean 2 %, median 2.2 %, standard deviation 1.3%). The values generally highlighted a gradient increasing with distance from the Strait of Hormoz. According to the standards of Environmental Protection Agency of United State, the organic carbon concentrations in the analyzed sediments were in the range of sediments with low to medium organic carbon level. Organic matter levels were in the range of 4.4 to 10 % (mean 7.3 %). Statistical analysis demonstrated that there were no significant differences between the stations. According to Pearson correlation, total organic matter and organic carbon had significant correlation with each other (R2=0.81, P=0.01). Results showed that deeper parts had relatively higher organic carbon level (R2=0.66, P=0.05).Our investigation showed that the accumulation pattern of organic carbon depended on the grain size of the sements. The stations with higher percent of silt and clay had higher organic carbon. The results revealed that organic carbon level has increased in resent years, which can influence on the potential of methylation and accumulation of metals in sediment. In this study the TOC/TN ratio for 33 sediments were between 3 and 8, which demonstrated that the source of organic carbon could be related to the recent algal bloom.
Keywords: Organic carbon, Organic matter, Total nitrogen, Strait of Hormuz, Algal bloom
Full-Text [PDF 570 kb]   (1922 Downloads)    
Type of Study: Basic and Original Research | Subject: Marine Chemistry
Received: 2014/02/5 | Accepted: 2014/02/5 | Published: 2014/02/5
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Agah H, Rahmanpour S, Sheijooni Fumani N. Organic Carbon and Organic Matter Levels in Sediments of the Strait of Hormoz, the Persian Gulf. JPG. 2013; 4 (13) :31-37
URL: http://jpg.inio.ac.ir/article-1-205-en.html

Volume 4, Issue 13 (Journal of the Persian Gulf (Marine Science) 2013) Back to browse issues page
نشریه علمی پژوهشی خلیج فارس Journal of the Persian Gulf
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