Fate and source distribution of organic constituents in a river-dominated tropical estuary

Salas, P. M.; Sujatha, C. H.; Kumar, C. S. Ratheesh

doi:10.1007/s12040-015-0598-1

Cited by 22 publications

(16 citation statements)

References 87 publications

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“…Biopolymeric carbon, which is regarded as the sum of three biochemical compounds (lipids, proteins and carbohydrates) (Manju et al 2012, Salas et al 2015, varied from 4,496 to 10,231 μg/g in the mangrove sediments with lipids being the dominant class among labile organic compounds, followed by protein and carbohydrates. LPD contributions to the labile organic matter pool in these sediments at stations 1, 2 and 3 were 49.89%, 31.95% and 62.29%, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…The dominance of carbohydrates and lower PRT:CHO ratio (<1) are typical features of detrital heterotrophic environments (Manju et al 2012). Since proteins are more readily used by bacteria than carbohydrates, high PRT:CHO ratios indicate recently produced organic matter, while low PRT:CHO ratios suggest the presence of aged organic matter (Manju et al 2012) and the role of proteins as potentially limiting factor for the benthic consumers (Salas et al 2015). PRT:CHO ratio varies depending on the depth and the trophic status of the system (Pusceddu et al 2004).…”

Section: Discussionmentioning

confidence: 99%

“…PRT:CHO ratio varies depending on the depth and the trophic status of the system (Pusceddu et al 2004). Values of the protein to carbohydrate ratio greater than 1 are typically reported immediately after a microphytobenthic bloom (Salas et al 2015) or after the deposition of freshly produced phytoplankton (Pusceddu et al 2004).…”

Section: Discussionmentioning

confidence: 99%

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Assessment of the quality and quantity of organic matter in the Rufiji mangrove surface sediments using biochemical composition

Shilla

2021

Tanz. J. Sci.

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This study was carried out to investigate spatial changes in the quality and quantity of sedimentary organic matter in the Rufiji mangrove system, Tanzania. Sediment samples were collected from three sampling sites. Total organic matter in mangrove sediments ranged from 7.28 ± 2.02% to 10.58 ± 1.34%. Protein concentrations varied from 1,145.33 ± 20.33 μg/g to 2,747.50 ± 25.14 μg/g in the mangrove sediments. Total carbohydrates, lipids and biopolymeric carbon in mangrove sediments ranged between 1,110.50 ± 16.31 μg/g and 1,914.17 ± 27.79 μg/g, 1,436.50 ± 24.13 μg/g and 6,373.50 ± 25.79 μg/g, and 4,496 μg C/g and 10,231.50 μg C/g, respectively. Tannins and lignins in mangrove sediments varied from 817.67 ± 12.97 μg/g to 1786.50 ± 30.74 μg/g, while stable carbon isotope (δ13C) in Rufiji mangrove sediments ranged between –26.64 ± 0.10 ‰ and –25.48 ± 0.13 ‰. Higher protein:carbohydrate (PRT:CHO) at station 3 indicated the presence of freshly deposited organic matter. The high lipid:carbohydrate (LPD:CHO) ratios observed in the Rufiji mangrove systems pointed towards the high quality of labile organic matter which supports benthic fauna. PCA revealed the association of variables and their distribution on trends across sites of the Rufiji mangrove system. Keywords: Organic matter, biochemical composition, Rufiji, mangroves, sediments

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Assessment of the quality and quantity of organic matter in the Rufiji mangrove surface sediments using biochemical composition

Shilla

2021

Tanz. J. Sci.

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“…The higher concentration of BPC at M6 related to increase biopolymeric carbon in both proteins and lipids (14.64 and 0.41 mgC/l) at this site. Proteins represent a significant portion of organic matter (Salas et al, 2015). Triacylglycerols (TAGs) or neutral lipids represent ~60% of the total dry weight of algae, more than 75% of the mass of TAGs is carbon, and thus TAGs represent rich sources of captured carbon in cells.…”

Section: Evaluation Of Biopolymeric Particulate Organic Carbon Of Phymentioning

confidence: 99%

“…Lipids/carbohydrates ratio was used as a food quality index of OM (Gremare et al, 2002). Proteins/carbohydrates ratio in phytoplankton of the two Rayahs was 43.82-39.88, which indicated the aging of organic matter in phytoplankton (Salas et al, 2015). In phytoplankton amino acids occupied about 67% of organic carbon, while carbohydrates and lipids contain about 4% and 15%, respectively (Lee et al, 2000;Wakeham et al, 2000).…”

Section: Table 2 Features Of Phytoplankton At El Rayah El Tawfiki Bamentioning

confidence: 99%

Evaluation of biopolymeric particulate organic carbon of phytoplankton from El Rayah El Tawfiki and El Rayah El Menoufy of Nile Delta, Egypt

El-Hady

2016

Journal of Egyptian Academic Society for Environmental Developm

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The concentration and composition of the biopolymeric particulate organic carbon (BPC) of the major phytoplankton components (proteins, carbohydrates and lipids) were measured in the two Nile Rayahs El Tawfiki and El Menoufy. BPC along El Rayah El Tawfiki (4.32-18.59 mgC/l) was associated to the high extent of the biopolymeric C of proteins (4.73-18.36 mgC/l). While the biopolymeric C of carbohydrates ranged between 0.08 to 0.27 mgC/l. The total concentration of biopolymeric C at El Rayah El Menoufy ranged from 6.19 to 15.42 mgC/l. The maximum concentrations of BPC detected at some sites of El Rayah El Menoufy were related to the higher biopolymeric carbon in both proteins and lipids. The present results showed a maximum positive correlation between both carbonate and bicarbonate of water body of El Rayah El Tawfiki and El Rayah El Menofy and BPC of phytoplankton (r= 0.9 and 1). BPC of phytoplankton was strongly related to the fraction of biopolymeric C associated with phytoproteins (r= 0.79). Variations in the estimated biochemical components of phytoplankton at the investigated Nile Rayahs followed the trend: Proteins˃ carbohydrates˃ lipids which indicated the highest protein contribution to C-BPC in both studied areas. Lipids/carbohydrates ratio in the two studied regions ranged between 0.55 and 0.57, which showed high nutritional value of organic matter in phytoplankton. Whereas, proteins/carbohydrates ratio ranged from 39.88 to 43.82, which indicated the aging of organic matter in phytoplankton. El Rayah El Tawfiki recorded higher energetic value (127.86 Kcal/l) than El Rayah El Menoufy (124.45 Kcal/l).This study demonstrated that fluctuation in phytoplankton composition due to the changes in carbonate and bicarbonate concentrations will have more impact on nutritional quality and biopolymeric carbon (BPC) of phytoplankton.

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Source and Biogeochemical Distribution of Organic Matter in Surface Sediment in the Deep Oligotrophic Lake Fuxian, China

et al. 2018

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Fate and source distribution of organic constituents in a river-dominated tropical estuary

Cited by 22 publications

References 87 publications

Assessment of the quality and quantity of organic matter in the Rufiji mangrove surface sediments using biochemical composition

Assessment of the quality and quantity of organic matter in the Rufiji mangrove surface sediments using biochemical composition

Evaluation of biopolymeric particulate organic carbon of phytoplankton from El Rayah El Tawfiki and El Rayah El Menoufy of Nile Delta, Egypt

Source and Biogeochemical Distribution of Organic Matter in Surface Sediment in the Deep Oligotrophic Lake Fuxian, China

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