Distribution of sterols in the suspended particles of the Chang Jiang Estuary and adjacent East China Sea

Sicre, Marie‐Alexandrine; Tian, Rongxiang; Saliot, A.

doi:10.1016/0146-6380(94)90083-3

Cited by 28 publications

(15 citation statements)

References 19 publications

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“…Biomarker compounds provide an additional level of detail in describing OM composition. Organic biomarkers were first applied to estuaries in the late 1980s (Canuel et al 1995, Saliot et al 1988, Sicre et al 1994, increasing the ability to distinguish among sources of OM in these systems. Biomarkers take advantage of the unique biochemical classes that make up different living organisms as well as the geochemical stability of particular biochemicals in the environment (Figure 2, Table 1).…”

Section: Dissolved Organic Matter (Dom)mentioning

confidence: 99%

Sources, Ages, and Alteration of Organic Matter in Estuaries

Canuel

Hardison

2016

Annu. Rev. Mar. Sci.

175

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Understanding the processes influencing the sources and fate of organic matter (OM) in estuaries is important for quantifying the contributions of carbon from land and rivers to the global carbon budget of the coastal ocean. Estuaries are sites of high OM production and processing, and understanding biogeochemical processes within these regions is key to quantifying organic carbon (Corg) budgets at the land-ocean margin. These regions provide vital ecological services, including nutrient filtration and protection from floods and storm surge, and provide habitat and nursery areas for numerous commercially important species. Human activities have modified estuarine systems over time, resulting in changes in the production, respiration, burial, and export of Corg. Corg in estuaries is derived from aquatic, terrigenous, and anthropogenic sources, with each source exhibiting a spectrum of ages and lability. The complex source and age characteristics of Corg in estuaries complicate our ability to trace OM along the river-estuary-coastal ocean continuum. This review focuses on the application of organic biomarkers and compound-specific isotope analyses to estuarine environments and on how these tools have enhanced our ability to discern natural sources of OM, trace their incorporation into food webs, and enhance understanding of the fate of Corg within estuaries and their adjacent waters.

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Section: Dissolved Organic Matter (Dom)mentioning

confidence: 99%

Sources, Ages, and Alteration of Organic Matter in Estuaries

Canuel

Hardison

2016

Annu. Rev. Mar. Sci.

175

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“…The C 27 , C 28 , C 29 sterol abundance ratio has been used to distinguish between autochthonous and allochthonous organic matter inputs in estuarine environments (Huang & Meinschein 1976;Saliot et al 1983;Sicre et al 1994) and in lake sediments (Matsumoto et al 1982(Matsumoto et al , 1983.…”

Section: Sterolsmentioning

confidence: 99%

The application of sterol biomarkers to the study of the sources of particulate organic matter in the Solo River system and and Serayu River, Java, Indonesia

Dagaut

Saliot

1995

Biogeochemistry

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Abstract. Sterols were analyzed in suspended particles collected in January 1991 in the Solo River system and in the Serayu River, Java, Indonesia. Free sterols were extracted from particles larger than 0.7 #im and analyzed, after derivatization into their trimethylsilyl esters, by GC and GC/MS. Concentrations of total sterols ranged from 438 to 7922 ng/l, or from 2.4 to 183.8 ng/mg of total suspendedmatter, which varied from 3.3 to 400 and 471 mg/I, respectively in the Serayu River and at the downstream station in the Solo River. POC concentrations also varied in a wide range, from 0.91 to 4.72 and 6.13% of TSM, respectively at the above stations, and were associated with sterol/POC values ranging from 0.15 to 1.75 ag/mg. Eleven structures of C27, C 28 and C 29 stenols and associated stanols were identified. 28A 22 was only found at downstream stations in the Solo River and in the Serayu River. This unique distribution, different from that of other C 27 , C 28 and C 29 sterols, suggests a predominantly autochthonous origin for these compounds associated with an increased planktonic biosynthesis near the estuary. Concentrations of 28A 5 , 29A 5 ' 2 and 29A 5 showed similar spatial distributions and increased downstream, reflecting the significant accumulation of organic matter originating from the vegetation of the various drainage basins.Values of the autochthonous versus terrigenous sterol index, defined as 27A 5 /29A 5 ' 2 2 + 29A 5 were in the 1.4-1.9 range at upstream stations, whereas at downstream stations lower values were found, 0.4-0.6, which also corresponded to higher concentrations of TSM and lower POC values.Insofar as the stanol/stenol values can be used to estimate the bacterial activity of oxic waters, simultaneous variations of C27 and C 29 stenol/stanol pairs suggest rather different bacterial degradation capacities of autochthonous versus allochthonous organic matter. The wide differencies between the values of the stenol/stanol pairs observed in one of the main tributaries and in downstream stations of the Solo River is evidence that allochthonous organic matter is much more resistant than autochthonous matter. The low index value observed in the Serayu River indicates the highly refractory nature of both autochthonous and allochthonous organic material.

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“…The results of alkenones and polyunsaturated fatty acids were discussed together with GDGTs. Biomarkers in POM from the ESC were previously investigated (e.g., sterols by Sicre et al, 1994), but this is the first report of GDGTs and alkenones in POM from the ECS.…”

Section: Introductionmentioning

confidence: 99%

Distribution of glycerol dialkyl glycerol tetraethers, alkenones and polyunsaturated fatty acids in suspended particulate organic matter in the East China Sea

et al. 2012

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We investigated the spatial distribution of glycerol dialkyl glycerol tetraethers (GDGTs), alkenones, and polyunsaturated fatty acids in particulate organic matter collected at four sites along a depth transect from the continental shelf to the Okinawa Trough in the East China GDGTs by an eastward current. At the slope and Okinawa Trough sites, TEX 86 -based temperatures were nearly constant in the water column deeper than 300 m and corresponded to temperatures at the surface and near-surface waters rather than in situ temperatures. This observation is consistent with a hypothesis that Thaumarchaeota cells produced in surface waters are delivered to deeper water and also indicates that the residence time of suspended GDGTs in the deep water column is large enough to mix the GDGTs produced in different seasons.

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Distribution of sterols in the suspended particles of the Chang Jiang Estuary and adjacent East China Sea

Cited by 28 publications

References 19 publications

Sources, Ages, and Alteration of Organic Matter in Estuaries

Sources, Ages, and Alteration of Organic Matter in Estuaries

The application of sterol biomarkers to the study of the sources of particulate organic matter in the Solo River system and and Serayu River, Java, Indonesia

Distribution of glycerol dialkyl glycerol tetraethers, alkenones and polyunsaturated fatty acids in suspended particulate organic matter in the East China Sea

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