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233483.pdf (1.27 MB)

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Data de publicació

2021-02

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cc-by (c) Catalán García, Núria et al., 2021
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/218834

The relevance of environment versus composition on dissolved organic matter degradation in freshwaters

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Recurs relacionat

https://doi.org/10.1002/lno.11606

Resum

Dissolved organic matter (DOM) composition exerts a direct control on its degradation and subsequent persistence in aquatic ecosystems. Yet, under certain conditions, the degradation patterns of DOM cannot be solely explained by its composition, highlighting the relevance of environmental conditions for DOM degradation. Here, we experimentally assessed the relative influence of composition vs. environment on DOM degradation by performing degradation bioassays using three contrasting DOM sources inoculated with a standardized bacterial inoculum under five distinct environments. The DOM degradation kinetics modeled using reactivity continuum models showed that composition was more important than environment in determining the bulk DOM decay patterns. Changes in DOM composition resulted from the interaction between DOM source and environment. The role of environment was stronger on shaping the bacterial community composition, but the intrinsic nature of the DOM source exerted stronger control on the DOM degradation function.

Matèries

Ecologia d'aigua dolça, Biogeoquímica

Matèries (anglès)

Freshwater ecology, Biogeochemistry

Citació

Col·leccions

Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

Citació

CATALÁN GARCÍA, Núria, et al. The relevance of environment versus composition on dissolved organic matter degradation in freshwaters. Limnology and Oceanography. 2021. Vol. 66, num. 2, pags. 306-320. ISSN 0024-3590. [consulted: 19 of August of 2026]. Available at: https://hdl.handle.net/2445/218834

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