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Cryptic Constituents: The Paradox of High Flux-Low Concentration Components of Aquatic Ecosystems

Olofsson, Malin and Power, Mary E. and Stahl, David A. and Vadeboncoeur, Yvonne and Brett, Michael T. (2021). Cryptic Constituents: The Paradox of High Flux-Low Concentration Components of Aquatic Ecosystems. Water. 13 , 2301
[Article Review/Survey]

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Abstract

The interface between terrestrial ecosystems and inland waters is an important link in the global carbon cycle. However, the extent to which allochthonous organic matter entering freshwater systems plays a major role in microbial and higher-trophic-level processes is under debate. Human perturbations can alter fluxes of terrestrial carbon to aquatic environments in complex ways. The biomass and production of aquatic microbes are traditionally thought to be resource limited via stoichiometric constraints such as nutrient ratios or the carbon standing stock at a given timepoint. Low concentrations of a particular constituent, however, can be strong evidence of its importance in food webs. High fluxes of a constituent are often associated with low concentrations due to high uptake rates, particularly in aquatic food webs. A focus on biomass rather than turnover can lead investigators to misconstrue dissolved organic carbon use by bacteria. By combining tracer methods with mass balance calculations, we reveal hidden patterns in aquatic ecosystems that emphasize fluxes, turnover rates, and molecular interactions. We suggest that this approach will improve forecasts of aquatic ecosystem responses to warming or altered nitrogen usage.

Authors/Creators:Olofsson, Malin and Power, Mary E. and Stahl, David A. and Vadeboncoeur, Yvonne and Brett, Michael T.
Title:Cryptic Constituents: The Paradox of High Flux-Low Concentration Components of Aquatic Ecosystems
Series Name/Journal:Water
Year of publishing :2021
Volume:13
Article number:2301
Number of Pages:11
Publisher:MDPI
ISSN:2073-4441
Language:English
Publication Type:Article Review/Survey
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
Keywords:turnover rates, inorganic nutrients, carbon, nitrogen, primary production
URN:NBN:urn:nbn:se:slu:epsilon-p-113363
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113363
Additional ID:
Type of IDID
DOI10.3390/w13162301
Web of Science (WoS)000690258100001
ID Code:25277
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:08 Sep 2021 13:25
Metadata Last Modified:08 Sep 2021 13:31

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