Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation

Freshwater ecosystems are increasingly threatened by chemical contaminants that can disrupt fundamental ecological processes. This study investigated the effects of tebuconazole (fungicide) and ciprofloxacin (antibiotic) on microbial and detritivore mediated leaf litter decomposition. We tested t...

Täydet tiedot

Bibliografiset tiedot
Päätekijä: Kalaotuwawe Munasinghelage, Binosha
Muut tekijät: Matemaattis-luonnontieteellinen tiedekunta, Faculty of Sciences, Bio- ja ympäristötieteiden laitos, Department of Biological and Environmental Science, Jyväskylän yliopisto, University of Jyväskylä
Aineistotyyppi: Pro gradu
Kieli:eng
Julkaistu: 2025
Aiheet:
Linkit: https://jyx.jyu.fi/handle/123456789/103738
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author Kalaotuwawe Munasinghelage, Binosha
author2 Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä
author_facet Kalaotuwawe Munasinghelage, Binosha Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä Kalaotuwawe Munasinghelage, Binosha Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä
author_sort Kalaotuwawe Munasinghelage, Binosha
datasource_str_mv jyx
description Freshwater ecosystems are increasingly threatened by chemical contaminants that can disrupt fundamental ecological processes. This study investigated the effects of tebuconazole (fungicide) and ciprofloxacin (antibiotic) on microbial and detritivore mediated leaf litter decomposition. We tested three hypotheses regarding chemical effects on decomposition processes, differential impacts between microbial groups, and detritivore contributions using a controlled laboratory experiment. Black alder (Alnus glutinosa) leaf discs were exposed to both chemicals at three concentrations (0, 50, and 1000 μg/L) over 28 days, with and without the freshwater isopod Asellus aquaticus. Decomposition was quantified as organic matter loss using ash-free dry mass measurements. Both chemicals significantly reduced microbial-mediated decomposition, but only at the highest concentration (1000 μg/L). Ciprofloxacin caused significantly greater inhibition than tebuconazole at equivalent concentrations, indicating bacterial communities are more functionally important in aquatic decomposition than fungal communities. Detritivore presence substantially enhanced decomposition rates, with microbial and detritivore pathways contributing nearly equally to total decomposition. These findings challenge the traditional fungal-centric paradigm of aquatic decomposition and demonstrate that bioactive contaminants can selectively impair ecosystem functioning through targeted effects on key microbial groups. The results highlight the vulnerability of bacterial-mediated processes and emphasize the importance of community-level approaches in freshwater ecotoxicological assessments.
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This study investigated the effects of \ntebuconazole (fungicide) and ciprofloxacin (antibiotic) on microbial and detritivore\nmediated leaf litter decomposition. We tested three hypotheses regarding chemical \neffects on decomposition processes, differential impacts between microbial groups, and detritivore contributions using a controlled laboratory experiment. Black alder (Alnus glutinosa) leaf discs were exposed to both chemicals at three concentrations (0, 50, and 1000 \u03bcg/L) over 28 days, with and without the freshwater isopod Asellus aquaticus. Decomposition was quantified as organic matter loss using ash-free dry mass measurements. Both chemicals significantly reduced microbial-mediated decomposition, but only at the highest concentration (1000 \u03bcg/L). Ciprofloxacin caused significantly greater inhibition than tebuconazole at equivalent concentrations, indicating bacterial communities are more functionally important in aquatic decomposition than fungal communities. Detritivore presence substantially enhanced decomposition rates, with microbial and detritivore pathways contributing nearly equally to total decomposition. These findings challenge the traditional fungal-centric paradigm of aquatic decomposition and demonstrate that bioactive contaminants can selectively impair ecosystem functioning through targeted effects on key microbial groups. The results highlight the vulnerability of bacterial-mediated processes and emphasize the importance of community-level approaches in freshwater ecotoxicological assessments.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2025-06-18T10:58:12Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2025-06-18T10:58:12Z (GMT). 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spellingShingle Kalaotuwawe Munasinghelage, Binosha Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation Tebuconazole Ciprofloxacin Asellus aquaticus microbial decomposition detritivores Akvaattiset tieteet Aquatic sciences eliöyhteisöt hajoaminen (kemia) vesiekosysteemit ympäristömyrkyt
title Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation
title_full Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation
title_fullStr Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation
title_full_unstemmed Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation
title_short Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation
title_sort effects of fungicide tebuconazole and the antibiotic ciprofloxacin on microbe mediated leaf litter degradation
title_txtP Effects of fungicide Tebuconazole and the antibiotic Ciprofloxacin on microbe mediated leaf-litter degradation
topic Tebuconazole Ciprofloxacin Asellus aquaticus microbial decomposition detritivores Akvaattiset tieteet Aquatic sciences eliöyhteisöt hajoaminen (kemia) vesiekosysteemit ympäristömyrkyt
topic_facet Akvaattiset tieteet Aquatic sciences Asellus aquaticus Ciprofloxacin Tebuconazole detritivores eliöyhteisöt hajoaminen (kemia) microbial decomposition vesiekosysteemit ympäristömyrkyt
url https://jyx.jyu.fi/handle/123456789/103738 http://www.urn.fi/URN:NBN:fi:jyu-202506185527
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