Microbial lipids of an intertidal sediment—I. Fatty acids and hydrocarbons

Volkman, John K.; Johns, R. B.; Gillan, F.T.; Perry, G.J.; Bavor, H. J.

doi:10.1016/0016-7037(80)90067-8

Cited by 514 publications

(202 citation statements)

References 49 publications

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“…The fact that the fatty acid 18:1(n-7) clustered on the periphery of the microalgal fatty acids suggests that it is produced by both bacteria and microalgae, as found in other studies, e.g. Volkman et al (1980). The PUFA 22:6(n-3) was also clustered on the periphery of the algal markers, most probably reflecting the fact that this fatty acid is produced by both microalgae (Volkman et al 1989) and sediment infauna (Kharlamenko et al 2001).…”

Section: Lipid Biomarkers As Indicators Of Sources Of Organic Carbon supporting

confidence: 76%

“…Therefore, it would appear that in this system 24-methylcholesta-5, 24(28)-dien-3β-ol is likely to arise mostly from diatoms. The presence of chlorophytes was indicated by the fatty acids 18:2(n-6) and 18:3(n-3) (Volkman et al 1980(Volkman et al , 1989, particularly at Site PC, where the pigment data suggested these algae were generally dominant. Although there are no generally accepted fatty acid markers for cyanobacteria, the 18:4 PUFA was present in relatively high proportions in the extract of separated MPB dominated by cyanobacteria.…”

Section: Lipids and Pigments As Indicators Of Mpb Taxonomymentioning

confidence: 96%

“…To estimate the relative contributions of different organic matter sources to the sediments, fatty acid data are separated into algal, terrestrial plant, aquatic macrophyte and bacterial markers (Volkman et al 1980, Canuel & Martens 1993, Shi et al 2001, Wilson et al 2001). Here, we have used an a posteriori approach to group the major sources of fatty acids.…”

Section: Lipid Biomarkers As Indicators Of Sources Of Organic Carbon mentioning

confidence: 99%

“…This may include organic matter exported from adjacent communities, including mangroves and saltmarshes (Meziane et al 1997, Meziane & Tsuchiya 2000, terrestrially eroded material such as peats , as well as the discharge of organic matter from anthropogenic sources (Meziane & Tsuchiya 2002). Autochthonous production of organic matter by microphytobenthos (MPB), macroalgae and bacteria may contribute significantly to the organic matter pool within mudflat sediments (Volkman et al 1980, Meziane et al 1997, Meziane & Tsuchiya 2000. Detritus from marine sources, such as seagrasses, as well as phytodetritus from pelagic algae blooms have also been identified as contributing to organic matter on mudflats (Volkman et al 1980, Rohjans et al 1998.…”

Section: Introductionmentioning

confidence: 99%

“…Autochthonous production of organic matter by microphytobenthos (MPB), macroalgae and bacteria may contribute significantly to the organic matter pool within mudflat sediments (Volkman et al 1980, Meziane et al 1997, Meziane & Tsuchiya 2000. Detritus from marine sources, such as seagrasses, as well as phytodetritus from pelagic algae blooms have also been identified as contributing to organic matter on mudflats (Volkman et al 1980, Rohjans et al 1998.…”

Section: Introductionmentioning

confidence: 99%

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Carbon and nitrogen cycling on intertidal mudflats of a temperate Australian estuary. III. Sources of organic matter

Cook¹,

Revill²,

Clementson³

et al. 2004

Mar. Ecol. Prog. Ser.

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The sources and cycling of organic matter on 2 mudflats in the Huon Estuary, SE Tasmania, were investigated over 4 seasons using pigment and lipid biomarkers as well as stable isotopes of carbon and nitrogen; 1 site was in the upper estuary,1 site was in a marine side-arm. The organic matter within the sediments at both sites was dominated by terrestrial sources, but most of this was refractory and only slowly remineralised. Significant, but seasonally variable, amounts of organic matter were derived from microphytobenthos (MPB), but this was rapidly remineralised and comprised only a minor fraction of the preserved sediment organic matter pool. Compound specific stable-isotope analysis of bacterial biomarkers suggested that the bacteria within the sediment were consuming microalgae-derived material. Separation of MPB from the sediment at the site in the upper estuary using the lens-tissue technique was found to significantly fractionate the algae community with cyanobacteria being enriched in the separated fraction. Nitrogen fixation probably contributed significantly to the growth requirements of cyanobacteria at the site in the upper estuary, as indicated by the low δ 15 N value of the cyanobacteria separated from the sediment.KEY WORDS: Microphytobenthos · Stable isotope · Compound-specific isotope-ratio mass spectrometry · Fatty acids · Sterols · Accessory pigment · Mudflat Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 280: [55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72] 2004 1999, Cahoon & Safi 2002), but this may shift seasonally to chlorophytes and cyanobacteria (Barranguet et al. 1997). In some areas, intertidal sediments may be dominated by cyanobacteria where high rates of nitrogen fixation may supply a significant amount of nitrogen to the benthic community (Stal et al. 1984, Bautista & Paerl 1985, Stal 1995.A number of approaches have been used to estimate the contributions of organic matter from various sources to sediments. Isotope ratios of 13 C/ 12 C have been used to estimate the relative contribution of terrestrial and marine sources to sedimentary organic matter (Fry & Sherr 1984). While this approach is relatively simple and gives an integrated estimate of sources for the total carbon in the sample, it will only provide useful information when there are 2 welldefined end-members. Furthermore, this technique gives little information about the type of marine or terrestrial organic matter in question.The use of lipid and pigment biomarkers such as fatty acids and sterols can allow the sources of various subfractions of organic matter to be identified much more specifically than any of the above approaches. However, unambiguously assigning sources to biomarkers is difficult, as they are rarely produced by a single class of organism. The advent of compound-specific stableisotope analysis has provided a powerful new tool for the differentiation between 2 sources of the same biomarker, provided the isotopic sign...

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Section: Lipid Biomarkers As Indicators Of Sources Of Organic Carbon supporting

confidence: 76%

Section: Lipids and Pigments As Indicators Of Mpb Taxonomymentioning

confidence: 96%

Section: Lipid Biomarkers As Indicators Of Sources Of Organic Carbon mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Carbon and nitrogen cycling on intertidal mudflats of a temperate Australian estuary. III. Sources of organic matter

Cook¹,

Revill²,

Clementson³

et al. 2004

Mar. Ecol. Prog. Ser.

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Hydroxy fatty acids in snow pit samples from Mount Tateyama in central Japan: Implications for atmospheric transport of microorganisms and plant waxes associated with Asian dust

et al. 2016

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We report here the source apportionment of atmospheric soil microorganisms and higher plant metabolites based on chemical markers (hydroxy fatty acids: FAs) in the snowpack samples collected from Mount Tateyama in central Japan during spring 2009 (N = 6) and 2011 (N = 7). A homologous series of β‐hydroxy FAs (C9–C20), constituents of Gram‐negative bacteria (GNB), in snowpacks clearly suggest a long‐range atmospheric transport of dust‐associated bacteria followed by scavenging by snowflakes. Similarly, higher atmospheric abundances of α‐(C16–C32) and ω‐(C9–C30)‐hydroxy FAs in the snow layers containing Asian dust revealed contributions from soil microbes and higher plant epicuticular waxes. Moreover, covariation between the concentrations of hydroxy FAs and water‐soluble Ca2+ (dust tracer), together with calculated air mass backward trajectories, demonstrated their source regions such as the Taklamakan Desert, Gobi Desert, and Loess Plateau. A close match of molecular distributions of hydroxy FAs (with the predominance of ω‐ and β‐isomers) is noteworthy between snowpack (present study) and springtime aerosols from Chichijima Island in the western North Pacific (WNP). This observation suggests a “below‐cloud scavenging” of transported dust particles and associated soil microbes in the East Asian outflow by snowflakes. These distributions are, however, contrary to those observed in the fresh snow samples from Sapporo, northern Japan (predominance of α‐hydroxy FAs), which could be explained by “in‐cloud” microbial oxidation processes. This comparison, therefore, provides additional insights regarding the aeolian transport of soil microbes in the East Asian outflow to the WNP, which has not been available.

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Tracing atmospheric transport of soil microorganisms and higher plant waxes in the East Asian outflow to the North Pacific Rim by using hydroxy fatty acids: Year‐round observations at Gosan, Jeju Island

et al. 2017

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Atmospheric transport of soil microorganisms and higher plant waxes in East Asia significantly influences the aerosol composition over the North Pacific. This study investigates the year‐round atmospheric abundances of hydroxy fatty acids (FAs), tracers of soil microorganisms (β‐isomers), and plant waxes (α‐ and ω‐isomers), in total suspended particles collected at Gosan, Jeju Island, during April 2001 to March 2002. These hydroxy FAs showed a pronounced seasonality, higher concentrations in winter/spring and lower concentrations in summer/autumn, which are consistent with other tracers of soil microbes (trehalose), resuspended dust (nss‐Ca2+), and stable carbon isotopic composition (δ13C) of total carbon. The molecular distributions of β‐hydroxy FAs (predominance of C12 and C16 in winter/spring and summer/autumn, respectively) are consistent with those from a remote island (Chichijima) in the North Pacific and Asian dust standards (CJ‐1 and CJ‐2). This observation together with back trajectories over Gosan reveal that desert sources in China during winter and arid regions of Mongolia and Russian Far East during spring are the major contributors of soil microbes over the North Pacific. Predominance of ω‐isomers (83%) over β‐hydroxy FAs (16%) revealed a major contribution of terrestrial lipids from higher plant waxes over soil microbes in the East Asian outflow.

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Microbial lipids of an intertidal sediment—I. Fatty acids and hydrocarbons

Cited by 514 publications

References 49 publications

Carbon and nitrogen cycling on intertidal mudflats of a temperate Australian estuary. III. Sources of organic matter

Carbon and nitrogen cycling on intertidal mudflats of a temperate Australian estuary. III. Sources of organic matter

Hydroxy fatty acids in snow pit samples from Mount Tateyama in central Japan: Implications for atmospheric transport of microorganisms and plant waxes associated with Asian dust

Tracing atmospheric transport of soil microorganisms and higher plant waxes in the East Asian outflow to the North Pacific Rim by using hydroxy fatty acids: Year‐round observations at Gosan, Jeju Island

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