Universität zu Köln

Zubrod, Jochen P., Englert, Dominic, Wolfram, Jakob ORCID: 0000-0002-0211-2191, Rosenfeldt, Ricki R., Feckler, Alexander, Bundschuh, Rebecca, Seitz, Frank, Konschak, Marco, Baudy, Patrick, Luederwald, Simon, Fink, Patrick ORCID: 0000-0002-5927-8977, Lorke, Andreas ORCID: 0000-0001-5533-1817, Schulz, Ralf ORCID: 0000-0002-6348-6971 and Bundschuh, Mirco ORCID: 0000-0003-4876-220X (2017). LONG-TERM EFFECTS OF FUNGICIDES ON LEAF-ASSOCIATED MICROORGANISMS AND SHREDDER POPULATIONS-AN ARTIFICIAL STREAM STUDY. Environ. Toxicol. Chem., 36 (8). S. 2178 - 2190. HOBOKEN: WILEY. ISSN 1552-8618

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Abstract

Leaf litter is a major source of carbon and energy for stream food webs, while both leaf-decomposing microorganisms and macroinvertebrate leaf shredders can be affected by fungicides. Despite the potential for season-long fungicide exposure for these organisms, however, such chronic exposures have not yet been considered. Using an artificial stream facility, effects of a chronic (lasting up to 8 wk) exposure to a mixture of 5 fungicides (sum concentration 20 mu g/L) on leaf-associated microorganisms and the key leaf shredder Gammarus fossarum were therefore assessed. While bacterial density and microorganism-mediated leaf decomposition remained unaltered, fungicide exposure reduced fungal biomass (<= 71%) on leaves from day 28 onward. Gammarids responded to the combined stress from consumption of fungicide-affected leaves and waterborne exposure with a reduced abundance (<= 18%), which triggered reductions in final population biomass (18%) and in the number of precopula pairs (<= 22%) but could not fully explain the decreased leaf consumption (19%), lipid content (<= 43%; going along with an altered composition of fatty acids), and juvenile production (35%). In contrast, fine particulate organic matter production and stream respiration were unaffected. Our results imply that long-term exposure of leaf-associated fungi and shredders toward fungicides may result in detrimental implications in stream food webs and impairments of detrital material fluxes. These findings render it important to understand decomposer communities' long-term adaptational capabilities to ensure that functional integrity is safeguarded. (C) 2017 SETAC.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zubrod, Jochen P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Englert, Dominic UNSPECIFIED UNSPECIFIED UNSPECIFIED Wolfram, Jakob UNSPECIFIED orcid.org/0000-0002-0211-2191 UNSPECIFIED Rosenfeldt, Ricki R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Feckler, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Bundschuh, Rebecca UNSPECIFIED UNSPECIFIED UNSPECIFIED Seitz, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Konschak, Marco UNSPECIFIED UNSPECIFIED UNSPECIFIED Baudy, Patrick UNSPECIFIED UNSPECIFIED UNSPECIFIED Luederwald, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Patrick UNSPECIFIED orcid.org/0000-0002-5927-8977 UNSPECIFIED Lorke, Andreas UNSPECIFIED orcid.org/0000-0001-5533-1817 UNSPECIFIED Schulz, Ralf UNSPECIFIED orcid.org/0000-0002-6348-6971 UNSPECIFIED Bundschuh, Mirco UNSPECIFIED orcid.org/0000-0003-4876-220X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-223743
DOI:	10.1002/etc.3756
Journal or Publication Title:	Environ. Toxicol. Chem.
Volume:	36
Number:	8
Page Range:	S. 2178 - 2190
Date:	2017
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1552-8618
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DECOMPOSER-DETRITIVORE SYSTEM; GAMMARUS-FOSSARUM CRUSTACEA; LITTER DECOMPOSITION; FATTY-ACIDS; VINEYARD STREAMS; ENERGY RESERVES; RISK-ASSESSMENT; SPP. CRUSTACEA; WASTE-WATER; PULEX L Multiple languages Environmental Sciences; Toxicology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22374