Fatty acid composition as biomarkers of freshwater microalgae: analysis of 37 strains of microalgae in 22 genera and in seven classes

Taipale, Sami J.; Strandberg, Ursula; Peltomaa, Elina; Galloway, Aaron W. E.; Ojala, Anne; Brett, Michael T.

doi:10.3354/ame01671

Cited by 257 publications

(324 citation statements)

References 65 publications

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“…For some systems, fatty acids have proven to be robust dietary tracers that make it possible to explore basal resource contributions at a much finer scale than possible when only using a few isotopes (Galloway et al 2014b). Most basal resource types synthesize 10 to 20 different fatty acid molecules, some of which are very characteristic for particular plant, algal, or bacterial groups (Galloway et al 2012, Taipale et al 2013. Dietary fatty acids have also been shown to leave strong signatures in some consumers (Brett et al 2006, Galloway et al 2014a.…”

Section: Recommendationsmentioning

confidence: 99%

Resource polygon geometry predicts Bayesian stable isotope mixing model bias

Brett¹

2014

Mar. Ecol. Prog. Ser.

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Section: Recommendationsmentioning

confidence: 99%

Resource polygon geometry predicts Bayesian stable isotope mixing model bias

Brett¹

2014

Mar. Ecol. Prog. Ser.

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“…More recently. C 16:1ω7 and C 20:5ω3 (eicosapentaenoic acid) were identified as two of the main fatty acids in Bacillariophyceae (Taipale et al, 2013). These two markers are present in our samples, and together form 40.5 and 34.1 % of the 6 March 2012 and 12 March 2013 samples (versus an average of 13.2 % across all samples), which, when coupled with our sterol analysis, concurs with our hypothesis that diatoms are major contributors in the algal blooms identified.…”

Section: Fatty Acidsmentioning

confidence: 99%

Seasonal survey of the composition and degradation state of particulate organic matter in the Rhône River using lipid tracers

et al. 2015

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Abstract. Lipid tracers including fatty acids, hydroxyacids, n-alkanols, sterols and triterpenoids were used to determine the origin and fate of suspended particulate organic matter (POM) collected in the Rhône River (France). This seasonal survey (April 2011 to May 2013) revealed a yearround strong terrestrial higher-plant contribution to the particulate organic matter (POM), with significant algal inputs observed in March and attributed to phytoplanktonic blooms likely dominated by diatoms. Major terrigenous contributors to our samples are gymnosperms, and more precisely their roots and stems, as evidenced by the presence of high proportions of ω-hydroxydocosanoic acid (a suberin biomarker). The high amounts of coprostanol detected clearly show that the Rhône River is significantly affected by sewage waters.Specific sterol degradation products were quantified and used to assess the part of biotic and abiotic degradation of POM within the river. Higher-plant-derived organic matter appears to be mainly affected by photo-oxidation and autoxidation (free radical oxidation), while organic matter of mammal or human origin, evidenced by the presence of coprostanol, is clearly more prone to bacterial degradation. Despite the involvement of an intense autoxidation-inducing homolytic cleavage of peroxy bonds, a significant proportion of hydroperoxides is still intact in higher plant debris. These compounds could affect the degradation of terrestrial material by inducing an intense autoxidation upon its arrival at sea.

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“…The most abundant PUFAs in all lakes were 18:3ω3 (α-linolenic acid), 18:4ω3 (stearidonic acid, SDA), 20:5ω3 (icosapentaenoic acid, EPA), 22:6ω3 (docosahexaenoic acid, DHA) and 20:4ω6 (arachidonic acid, ARA), common PUFAs in freshwater phytoplankton (Taipale et al, 2013), and their concentration-weighted δ 13 C were used to determine phytoplankton isotope ratios (δ 13 C phyto ). Note that phytoplankton is considered a mixture of eukaryotic algae and cyanobacteria.…”

Section: δ 13 C Of Phytoplankton and Bacteriamentioning

confidence: 99%

Stable carbon isotope biogeochemistry of lakes along a trophic gradient

et al. 2014

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Abstract. The stable carbon (C) isotope variability of dissolved inorganic and organic C (DIC and DOC), particulate organic carbon (POC), glucose and polar-lipid derived fatty acids (PLFAs) was studied in a survey of 22 North American oligotrophic to eutrophic lakes. The δ 13 C of different PLFAs were used as proxy for phytoplankton producers and bacterial consumers. Lake pCO 2 was primarily determined by autochthonous production (phytoplankton biomass), especially in eutrophic lakes, and governed the δ 13 C of DIC. All organic-carbon pools showed overall higher isotopic variability in eutrophic lakes (n = 11) compared to oligomesotrophic lakes (n = 11) because of the high variability in δ 13 C at the base of the food web (both autochthonous and allochthonous carbon). Phytoplankton δ 13 C was negatively related to lake pCO 2 over all lakes and positively related to phytoplankton biomass in eutrophic lakes, which was also reflected in a large range in photosynthetic isotope fractionation (ε CO 2 −phyto , 8-25 ‰). The carbon isotope ratio of allochthonous carbon in oligo-mesotrophic lakes was rather constant, while it varied in eutrophic lakes because of maize cultivation in the watershed.

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Fatty acid composition as biomarkers of freshwater microalgae: analysis of 37 strains of microalgae in 22 genera and in seven classes

Cited by 257 publications

References 65 publications

Resource polygon geometry predicts Bayesian stable isotope mixing model bias

Resource polygon geometry predicts Bayesian stable isotope mixing model bias

Seasonal survey of the composition and degradation state of particulate organic matter in the Rhône River using lipid tracers

Stable carbon isotope biogeochemistry of lakes along a trophic gradient

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