Ecological theory applied to environmental metabolomes reveals compositional divergence despite conserved molecular properties.

Autor: Danczak RE; Pacific Northwest National Laboratory, Washington, USA. Electronic address: robert.danczak@pnnl.gov., Goldman AE; Pacific Northwest National Laboratory, Washington, USA., Chu RK; Environmental Molecular Sciences Laboratory, Washington, USA., Toyoda JG; Environmental Molecular Sciences Laboratory, Washington, USA., Garayburu-Caruso VA; Pacific Northwest National Laboratory, Washington, USA., Tolić N; Environmental Molecular Sciences Laboratory, Washington, USA., Graham EB; Pacific Northwest National Laboratory, Washington, USA., Morad JW; Pacific Northwest National Laboratory, Washington, USA., Renteria L; Pacific Northwest National Laboratory, Washington, USA., Wells JR; Pacific Northwest National Laboratory, Washington, USA; Oregon State University, Oregon, USA., Herzog SP; O'Neil School of Public Environmental Affairs, Indiana University, Indiana, USA., Ward AS; O'Neil School of Public Environmental Affairs, Indiana University, Indiana, USA., Stegen JC; Pacific Northwest National Laboratory, Washington, USA.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Sep 20; Vol. 788, pp. 147409. Date of Electronic Publication: 2021 May 08.
DOI: 10.1016/j.scitotenv.2021.147409
Abstrakt: Stream and river systems transport and process substantial amounts of dissolved organic matter (DOM) from terrestrial and aquatic sources to the ocean, with global biogeochemical implications. However, the underlying mechanisms affecting the spatiotemporal organization of DOM composition are under-investigated. To understand the principles governing DOM composition, we leverage the recently proposed synthesis of metacommunity ecology and metabolomics, termed 'meta-metabolome ecology.' Applying this novel approach to a freshwater ecosystem, we demonstrated that despite similar molecular properties across metabolomes, metabolite identity significantly diverged due to environmental filtering and variations in putative biochemical transformations. We refer to this phenomenon as 'thermodynamic redundancy,' which is analogous to the ecological concept of functional redundancy. We suggest that under thermodynamic redundancy, divergent metabolomes can support equivalent biogeochemical function just as divergent ecological communities can support equivalent ecosystem function. As these analyses are performed in additional ecosystems, potentially generalizable concepts, like thermodynamic redundancy, can be revealed and provide insight into DOM dynamics.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021. Published by Elsevier B.V.)
Databáze: MEDLINE
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