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2019-07-16Zeitschriftenartikel DOI: 10.18452/20183
Essential Biomolecules in Food Webs
dc.contributor.authorRuess, Liliane
dc.contributor.authorMüller-Navarra, Dörthe C.
dc.date.accessioned2019-07-17T07:17:14Z
dc.date.available2019-07-17T07:17:14Z
dc.date.issued2019-07-16none
dc.identifier.issn2296-701X
dc.identifier.other10.3389/fevo.2019.00269
dc.identifier.urihttp://edoc.hu-berlin.de/18452/20932
dc.description.abstractWe 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 B12 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 B12 produced by ammonium oxidizing Archaea is essential to many aquatic algae, whereas terrestrial plants escaped this dependency by using B12 independent enzymes. Long-chain &3 polyunsaturated FA (LC-&3PUFA) in aquatic systemsmainly originate fromplanktonic 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-&3PUFA 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, CO2, 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 seemto bemore 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.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectfood webeng
dc.subjectessential biomoleculeseng
dc.subjectfatty acidseng
dc.subjectamino acidseng
dc.subjectsterolseng
dc.subjectvitaminseng
dc.subjecttrophic transfereng
dc.subjectenvironmental distributioneng
dc.subject.ddc570 Biologienone
dc.titleEssential Biomolecules in Food Websnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/20932-3
dc.identifier.doihttp://dx.doi.org/10.18452/20183
dc.type.versionpublishedVersionnone
local.edoc.container-titleFrontiers in Ecology and Evolutionnone
local.edoc.pages18none
local.edoc.anmerkungThis article was supported by the German Research Foundation (DFG) and the Open Access Publication Fund of Humboldt-Universität zu Berlin.
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionLebenswissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-urlhttps://doi.org/10.3389/fevo.2019.00269none
local.edoc.container-publisher-nameFrontiers Medianone
local.edoc.container-publisher-placeLausannenone
local.edoc.container-volume7none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber269

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