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As above, so below? Effects of fungicides on microbial organic matter decomposition are stronger in the hyporheic than in the benthic zone

Bollinger, Eric and Zubrod, Jochen P. and Konschak, Marco and Sulzer, Lenz and Schnurr, Jacob and Schreiner, Verena C. and Schulz, Ralf and Bundschuh, Mirco (2022). As above, so below? Effects of fungicides on microbial organic matter decomposition are stronger in the hyporheic than in the benthic zone. Limnology and Oceanography. 67 :1 , 39-52
[Research article]

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Abstract

Microbial organic matter decomposition is a critical ecosystem function, which can be negatively affected by chemicals. Although the majority of organic matter is stored in sediments, the impact of chemicals has exclusively been studied in benthic systems. To address this knowledge gap, we assessed the impact of a fungicide mixture at three concentrations on the decomposition of black alder leaves in the benthic and hyporheic zone. We targeted two sediment treatments characterized by fine and coarse grain sizes (1-2 vs. 2-4 mm). Besides microbial communities' functioning (i.e., decomposition), we determined their structure through microbial biomass estimates and community composition. In absence of fungicides, leaf decomposition, microbial biomass estimates and fungal sporulation were lower in the hyporheic zone, while the importance of bacteria was elevated. Leaf decomposition was reduced (40%) under fungicide exposure in fine sediment with an effect size more than twice as high as in the benthic zone (15%). These differences are likely triggered by the lower hydraulic conductivity in the hyporheic zone influencing microbial dispersal as well as oxygen and nutrient fluxes. Since insights from the benthic zone are not easily transferable, these results indicate that the hyporheic zone requires a higher recognition with regard to ecotoxicological effects on organic matter decomposition.

Authors/Creators:Bollinger, Eric and Zubrod, Jochen P. and Konschak, Marco and Sulzer, Lenz and Schnurr, Jacob and Schreiner, Verena C. and Schulz, Ralf and Bundschuh, Mirco
Title:As above, so below? Effects of fungicides on microbial organic matter decomposition are stronger in the hyporheic than in the benthic zone
Series Name/Journal:Limnology and Oceanography
Year of publishing :2022
Volume:67
Number:1
Page range:39-52
Number of Pages:14
Publisher:WILEY
ISSN:0024-3590
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-No Derivative Works 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
URN:NBN:urn:nbn:se:slu:epsilon-p-114452
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114452
Additional ID:
Type of IDID
DOI10.1002/lno.11973
Web of Science (WoS)000718849500001
ID Code:27094
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:14 Feb 2022 14:25
Metadata Last Modified:14 Feb 2022 14:31

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