The fatty acid content of plankton is changing in subtropical coastal waters as a result of OA: Results from a mesocosm study

Wang, Tifeng; Tong, Shanying; Liu, Nana; Li, Futian; Wells, Mark L.; Gao, Kunshan

doi:10.1016/j.marenvres.2017.10.010

Cited by 11 publications

(11 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, larval fish exhibited more whole-body fat at higher CO 2 , including essential FAs (Díaz-Gill et al, 2015). Studies combining effects of warming and acidification found minor or no changes in the essential AA content in marine diatoms (Bermúdez et al, 2015) but an increase in EPA in primary producer and mesozooplankton consumer (Wang et al, 2017). By using AA-specific δ 13 C measured in long living deepsea corals, McMahon et al (2015a) could detect a shift toward non N 2 -fixing cyanobacteria during warmer times, i.e., in the Medieval Climate Anomaly and the Industrial Era.…”

Section: Anthropogenic Impactmentioning

confidence: 99%

Essential Biomolecules in Food Webs

Rueß

Müller-Navarra

2019

Front. Ecol. Evol.

View full text Add to dashboard Cite

We here review the ecological role of essential nutritional biomolecules [fatty acids (FA), amino acids (AA), sterols, vitamins] in aquatic and terrestrial food webs, encompassing the forces behind their environmental distribution. Across ecosystems, mutualistic relationships frequently ensure exchanges of vitamins between producer and demander, especially between B 12 and other B vitamins as well as the AA methionine. In contrast, FA, sterols and most AA are transferred up the food chain via classical predatorprey interactions, and therefore have good biomarker potential for trophic interactions. As biomass-flow depends on the absolute amounts of potential limiting resources, considering solely the relative share in the respective biochemical group may underor overestimate the availability to consumers. Moreover, if not accounted for, "hidden" trophic channels, such as gut symbionts as well as metabolic conversion of precursor molecules, can hamper food web analyses. Fundamental differences exist between aquatic and terrestrial ecosystems: Vitamin B 12 produced by ammonium oxidizing Archaea is essential to many aquatic algae, whereas terrestrial plants escaped this dependency by using B 12 independent enzymes. Long-chain ω3 polyunsaturated FA (LC-ω3PUFA) in aquatic systems mainly originate from planktonic algae, while in terrestrial systems, belowground invertebrates can well be a source, also supporting aboveground biota. Interlinks from terrestrial to aquatic ecosystems are of a biochemically totally different nature than vice versa. While biomass rich in proteins and LC-ω3PUFA is transferred to land, e.g., by trophic relationships, the link from terrestrial to aquatic ecosystems provides recalcitrant plant carbon, mainly devoid of essential nutrients, fuelling detrital food chains. Recent global changes influence food webs via altered input and transfer of essential biomolecules, but separating the effects of nutrients, CO 2 , and warming is not trivial. Current evolutionary concepts (e.g., Black Queen, relaxed selection) considering the costs of metabolic production partly explain food web dynamics, especially for vitamins, whereas adaptations to potential oxidative stress seem to be more important for LC-PUFA. Overall, the provision with essential biomolecules is precious for both heterotrophs and auxotrophs. These nutritional valuable molecules often are kept unaltered in consumer metabolism, including their stable isotope composition, offering a great advantage for their use as trophic markers.

show abstract

Section: Anthropogenic Impactmentioning

confidence: 99%

Essential Biomolecules in Food Webs

Rueß

Müller-Navarra

2019

Front. Ecol. Evol.

View full text Add to dashboard Cite

show abstract

“…4. Principal component analysis comparing the specific signatures of (A) amino acids and (B) fatty acids of marine-derived fungi with those of other pelagic organisms (Chuecas & Riley 1969, Lewis 1969, Jeffries 1970, Raymont et al 1973, Taylor & Parkes 1983, Lee et al 1988, Simon & Azam 1989, Brown et al 1991, Nichols et al 1993, Zhukova & Aizdaicher 1995, Russell & Nichols 1999, Oren & Mana 2002, Das et al 2007, Escribano & Perez 2010, Medina et al 2014, Wang et al 2017. Arrows indicate amino acids and fatty acids that explain singular signatures of each group δ 13 C and δ 15 N are determined by the substrate for fungal growth.…”

Section: Biochemical Signature Of Fungi In the Marine Ecosystemmentioning

confidence: 99%

“…These biochemical signatures, and an elemental composition indicative of a marine planktonic source, have potential applications for the assessment of fungal contribution to marine microbial biomass and organic matter reservoirs, and the cycling of carbon and nutrients. geochemical role in the ocean , Richards et al 2012, Burgaud et al 2013, Wang et al 2014, Fuentes et al 2015, Bochdansky et al 2016, Taylor & Cunliffe 2016, Tisthammer et al 2016, Wang et al 2017, Jephcott et al 2017, Grossart et al 2019). These findings support inclusion of fungi in models of the marine microbial loop and the oceanic carbon cycle (Gutiérrez et al 2011, Cunliffe et al 2017, Jephcott et al 2017), but critical gaps in our knowledge have hindered a complete understanding of the role of fungi in marine ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Biochemical fingerprints of marine fungi: implications for trophic and biogeochemical studies

Gutiérrez

Vera

Srain

et al. 2020

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

Fungi are ubiquitous in the marine environment, but their role in carbon and nitrogen cycling in the ocean, and in particular the quantitative significance of fungal biomass to ocean biogeochemistry, has not yet been assessed. Determination of the biochemical and stable isotope composition of marine fungi can provide a basis for identifying fungal patterns in relation to other microbes and detritus, and thus allow evaluation of their contribution to the transformation of marine organic matter. We characterized the biochemical composition of 13 fungal strains isolated from distinct marine environments in the eastern South Pacific Ocean off Chile. Proteins accounted for 3 to 21% of mycelial dry weight, with notably high levels of the essential amino acids histidine, threonine, valine, lysine and leucine, as well as polyunsaturated fatty acids, ergosterol, and phosphatidylcholine. Elemental composition and energetic content of these marine-derived fungi were within the range reported for bacteria, phytoplankton, zooplankton and other metazoans from aquatic environments, but a distinct pattern of lipids and proteins was identified in marine planktonic fungi. These biochemical signatures, and an elemental composition indicative of a marine planktonic source, have potential applications for the assessment of fungal contribution to marine microbial biomass and organic matter reservoirs, and the cycling of carbon and nutrients.

show abstract

“…Laboratory studies on individual phytoplankton species have primarily shown negative effects of increased p CO 2 on PUFAs [11–16] or no significant changes in FA [7,17,18]. Mesocosm studies on natural communities have observed a wide range of responses including declines in PUFAs with increased p CO 2 [19], no effect on FA [20] or increased PUFAs [21,22]. Phytoplankton stoichiometry and FA content are also affected by temperature and the interaction between p CO 2 and temperature [12,13,17], making the effect of OA on food quality difficult to predict.…”

Section: Introductionmentioning

confidence: 99%

“…The FA content of copepods declined with increased p CO 2 in mesocosms that had reduced phytoplankton FA at elevated p CO 2 [20] and when there was no change in the phytoplankton community’s FA [40]. In another mesocosm, PUFA content of the phytoplankton community increased under elevated p CO 2 , copepod grazing declined, and copepod FA content was not affected [22]. In a crossed temperature x CO 2 study, higher temperature was a much stronger driver than CO 2 , causing altered fatty acid composition and declines in copepod abundance, although changes in the phytoplankton were not measured [41].…”

Section: Introductionmentioning

confidence: 99%

Direct and indirect effects of elevated CO2 are revealed through shifts in phytoplankton, copepod development, and fatty acid accumulation

et al. 2019

View full text Add to dashboard Cite

Change in the nutritional quality of phytoplankton is a key mechanism through which ocean acidification can affect the function of marine ecosystems. Copepods play an important role transferring energy from phytoplankton to higher trophic levels, including fatty acids (FA)—essential macronutrients synthesized by primary producers that can limit zooplankton and fisheries production. We investigated the direct effects of pCO2 on phytoplankton and copepods in the laboratory, as well as the trophic transfer of effects of pCO2 on food quality. The marine cryptophyte Rhodomonas salina was cultured at 400, 800, and 1200 μatm pCO2 and fed to adult Acartia hudsonica acclimated to the same pCO2 levels. We examined changes in phytoplankton growth rate, cell size, carbon content, and FA content, and copepod FA content, grazing, respiration, egg production, hatching, and naupliar development. This single-factor experiment was repeated at 12°C and at 17°C. At 17°C, the FA content of R. salina responded non-linearly to elevated pCO2 with the greatest FA content at intermediate levels, which was mirrored in A. hudsonica; however, differences in ingestion rate indicate that copepods accumulated FA less efficiently at elevated pCO2. A. hudsonica nauplii developed faster at elevated pCO2 at 12°C in the absence of strong food quality effects, but not at 17°C when food quality varied among treatments. Our results demonstrate that changes to the nutritional quality of phytoplankton are not directly translated to their grazers, and that studies that include trophic links are key to unraveling how ocean acidification will drive changes in marine food webs.

show abstract

The fatty acid content of plankton is changing in subtropical coastal waters as a result of OA: Results from a mesocosm study

Cited by 11 publications

References 50 publications

Essential Biomolecules in Food Webs

Essential Biomolecules in Food Webs

Biochemical fingerprints of marine fungi: implications for trophic and biogeochemical studies

Direct and indirect effects of elevated CO2 are revealed through shifts in phytoplankton, copepod development, and fatty acid accumulation

Contact Info

Product

Resources

About