Effects of a fungicide (imazalil) and an insecticide (diazinon) on stream fungi and invertebrates associated with litter breakdown

Flores, Lorea; Banjac, Zoran; Farré, Marinel.la; Larrañaga, Aitor; Mas‐Martí, Esther; Muñoz, Isabel; Barceló, Damià; Elosegi, Arturo

doi:10.1016/j.scitotenv.2014.01.059

Cited by 51 publications

(44 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Diazinon, at concentrations ranging between 0.05 and 50 µg L −1 , promoted sporulation of Heliscella stellata (Flores et al, 2014). Although above environmentally relevant concentrations, dimethoate (at 2500 µg L −1 ) increased fungal mycelia density, zoosporangia concentration, and the number of sexual and asexual organs in the species Achyla racemosa, Dictyuchus monosporus, Saprolegnia ferax, Thraustotheca clavata , and Allomyces arbuscula (Khallil and Omar, 1993).…”

Section: Specific Effects Of Pesticidesmentioning

confidence: 99%

“…The imidazole fungicide, imazalil, reduced the sporulation of Heliscella stellata, Lunalospora curvula , and other sigmoid type-2 aquatic fungi at concentrations ranging between 0.1–100 µg L −1 (Flores et al, 2014). Imazalil also had a EC 100 on aquatic fungi at concentrations ranging from 10 000 to 210 000 µg L −1 (Dijksterhuis et al, 2011).…”

Section: Specific Effects Of Pesticidesmentioning

confidence: 99%

See 1 more Smart Citation

A synthesis of the effects of pesticides on microbial persistence in aquatic ecosystems

Staley

Harwood

Rohr

2015

Critical Reviews in Toxicology

100

View full text Add to dashboard Cite

Pesticides are a pervasive presence in aquatic ecosystems throughout the world. While pesticides are intended to control fungi, insects, and other pests, their mechanisms of action are often not specific enough to prevent unintended effects, such as on non-target microbial populations. Microorganisms, including algae and cyanobacteria, protozoa, aquatic fungi, and bacteria, form the basis of many food webs and are responsible for crucial aspects of biogeochemical cycling; therefore, the potential for pesticides to alter microbial community structures must be understood to preserve ecosystem services. This review examines studies that focused on direct population-level effects and indirect community-level effects of pesticides on microorganisms. Generally, insecticides, herbicides, and fungicides were found to have adverse direct effects on algal and fungal species. Insecticides and fungicides also had deleterious direct effects in the majority of studies examining protozoa species, although herbicides were found to have inconsistent direct effects on protozoans. Our synthesis revealed mixed or no direct effects on bacterial species among all pesticide categories, with results highly dependent on the target species, chemical, and concentration used in the study. Examination of community-level, indirect effects revealed that all pesticide categories had a tendency to reduce higher trophic levels, thereby diminishing top-down pressures and favoring lower trophic levels. Often, indirect effects exerted greater influence than direct effects. However, few studies have been conducted to specifically address community-level effects of pesticides on microorganisms and further research is necessary to better understand and predict the net effects of pesticides on ecosystem health.

show abstract

Section: Specific Effects Of Pesticidesmentioning

confidence: 99%

Section: Specific Effects Of Pesticidesmentioning

confidence: 99%

A synthesis of the effects of pesticides on microbial persistence in aquatic ecosystems

Staley

Harwood

Rohr

2015

Critical Reviews in Toxicology

100

View full text Add to dashboard Cite

show abstract

“…In fact, the 'leaf conditioning' by bacteria and fungi is an indispensable prerequisite for the feeding activity of shredding invertebrates (Bärlocher and Kendrick, 1975;Cummins et al, 1973), with the fungal community composition determining the leaf palatability Suberkropp, 1984, 1989;Suberkropp et al, 1983;Gulis and Suberkropp, 2003). Hence, fungicides acting on the microbial decomposers indirectly affect the habitat or food choices of shredding invertebrates Flores et al, 2014;Rasmussen et al, 2012aRasmussen et al, , 2012bZubrod et al, 2011Zubrod et al, , 2015, and the reduction of shredders has been linked to a slow-down of leaf decomposition processes (e.g., Flores et al, 2014;Rasmussen et al, 2008;Wallace et al, 1982). In the present study, shredders were found at sites with and without Carbofuran impact, at mean proportions of 19% (total of taxa) and 21% (total of SPEAR).…”

Section: Concentration-response Dependence and Compounds Responsible mentioning

confidence: 99%

“…These proportions were similar to the whole set of sites investigated (20%, 23%, and 55%, respectively). Direct and indirect effects of pesticides on the leaf litter breakdown are hard to distinguish (Flores et al, 2014;Zubrod et al, 2011). Moreover, low food quality, as induced by indirect effects of pesticides, can trigger higher food intake in shredder taxa seeking to compensate for the decreased nutritional benefit (Cummins and Klug, 1979;Rasmussen et al, 2012a;Simpson and Abisgold, 1985).…”

Section: Concentration-response Dependence and Compounds Responsible mentioning

confidence: 99%

Pesticide impact on aquatic invertebrates identified with Chemcatcher® passive samplers and the SPEARpesticides index

Münze

Orlinskiy

Gunold

et al. 2015

Science of The Total Environment

View full text Add to dashboard Cite

“…The partial decomposition and colonization of leaves with bacteria and aquatic hyphomycetes (fungi that grow on dead leaves and sporulate underwater) is known as conditioning [26]. This length of time has been used to inoculate the leaves of various tree species with stream microbes for studies of leaf decomposition [27][28][29]. Leaves were conditioned in the stream for 14 d to 15 d in May (8-12 8C for QUILT experiment) and July (20-23 8C for PRISTINE experiment) in 2014.…”

Section: Preparation Of Leaf Discsmentioning

confidence: 99%

Effects of two fungicide formulations on microbial and macroinvertebrate leaf decomposition under laboratory conditions

Elskus

Smalling

Hladik

et al. 2016

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Aquatic fungi contribute significantly to the decomposition of leaves in streams, a key ecosystem service. Little is known, however, about the effects of fungicides on aquatic fungi and macroinvertebrates involved with leaf decomposition. Red maple (Acer rubrum) leaves were conditioned in a stream to acquire microbes (bacteria and fungi) or leached in tap water (unconditioned) to simulate potential reduction of microbial biomass by fungicides. Conditioned leaves were exposed to fungicide formulations QUILT (azoxystrobin + propiconazole) or PRISTINE (boscalid + pyraclostrobin) in the presence and absence of the leaf shredder, Hyalella azteca (amphipods; 7-d old at start of exposures) for 14 d at 23 °C. The QUILT formulations (∼0.3 μg/L, 1.8 μg/L, and 8 μg/L) tended to increase leaf decomposition by amphipods (not significant) without a concomitant increase in amphipod biomass, indicating potential increased consumption of leaves with reduced nutritional value. The PRISTINE formulation (∼33 μg/L) significantly reduced amphipod growth and biomass (p < 0.05), effects similar to those observed with unconditioned controls. The significant suppressive effects of PRISTINE on amphipod growth and the trend toward increased leaf decomposition with increasing QUILT concentration indicate the potential for altered leaf decay in streams exposed to fungicides. Further work is needed to evaluate fungicide effects on leaf decomposition under conditions relevant to stream ecosystems, including temperature shifts and pulsed exposures to pesticide mixtures. Environ Toxicol Chem 2016;35:2834-2844. Published 2016 Wiley Periodicals Inc. on behalf of SETAC. This article is a US Government work and, as such, is in the public domain in the United States of America.

show abstract

Effects of a fungicide (imazalil) and an insecticide (diazinon) on stream fungi and invertebrates associated with litter breakdown

Cited by 51 publications

References 70 publications

A synthesis of the effects of pesticides on microbial persistence in aquatic ecosystems

A synthesis of the effects of pesticides on microbial persistence in aquatic ecosystems

Pesticide impact on aquatic invertebrates identified with Chemcatcher® passive samplers and the SPEARpesticides index

Effects of two fungicide formulations on microbial and macroinvertebrate leaf decomposition under laboratory conditions

Contact Info

Product

Resources

About