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Environmental problems - Chemical approaches
RESEARCH FRONT

Low-density polyethylene microplastics as a source and carriers of agrochemicals to soil and earthworms

Andrés Rodríguez-Seijo https://orcid.org/0000-0003-4868-3069 A E , Bruna Santos A , Eduardo Ferreira da Silva B , Anabela Cachada A C D and Ruth Pereira A
+ Author Affiliations
- Author Affiliations

A GreenUPorto and Department of Biology, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal.

B Department of Geosciences, Geobiotec Research Centre, University of Aveiro, Aveiro 3810-193, Portugal.

C Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Matosinhos 4450-208, Portugal.

D Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Campus de Santiago, Aveiro 3810-193, Portugal.

E Corresponding author. Email: andresrodriguezseijo@hotmail.com

Environmental Chemistry 16(1) 8-17 https://doi.org/10.1071/EN18162
Submitted: 31 July 2018  Accepted: 9 October 2018   Published: 30 October 2018

Environmental context. Microplastics, long recognised as contaminants in aquatic ecosystems, are increasingly of environmental concern for terrestrial ecosystems. This study focuses on the potential of microplastics to act as carriers of agrochemicals and the subsequent effects on soil biota. The results indicate the need for further studies into how soil properties influence both the degradation of microplastics and their role as pollutant carriers.

Abstract. Microplastics (MPs) are of environmental concern to marine ecosystems owing to the evidence of their presence in and adverse effects on organisms, but studies to address this problem on soils and its biota are scarce. Several questions can arise related to this major environmental problem and its impact on terrestrial ecosystems, mainly, whether MPs can transport contaminants (e.g. pesticides) to the soil matrix and if they can be a carrier of pesticides to soil biota. To contribute to the understanding of these issues, earthworms (Eisenia fetida) were exposed for 14 days to soil containing two different sized MPs (5 mm and 0.25 µm–1 mm) that were either previously sprayed or not with chlorpyrifos (CPF). Acetylcholinesterase (AChE) activity and thiobarbituric acid reactive substances (TBARS) were measured to track the exposure of the earthworms to MPs, both non-sprayed and sprayed with CPF. The behaviour of the earthworms in the test containers and the movement of MPs in the soil were assessed. The concentration of CPF in soil at the end of the experiment differed between the treatments with MPs of different sizes (17.9 ng g−1 and 2442 ng g−1 for large and small MPs, respectively). Despite the ability of the MPs to release CPF to the soil, the earthworms avoided the contaminated MPs at the highest contaminant level. At a lower concentration of CPF (large MPs), the earthworms avoided the MPs, but the contact time with contaminated soil was higher, as shown by the enhanced level of TBARs and AChE inhibition. However, no evidence of MPs uptake was recorded, thus it was not demonstrated that MPs can be carriers of pesticides to earthworms.

Additional keywords: acetylcholine, ecotoxicology, oxidative stress, terrestrial ecosystems, thiobarbituric acid reactive substances.


References

Abd El-Hakim YM, Mohamed WA, El-Metwally AE (2018). Spirulina platensis attenuates furan reprotoxicity by regulating oxidative stress, inflammation, and apoptosis in testis of rats. Ecotoxicology and Environmental Safety 161, 25–33.
Spirulina platensis attenuates furan reprotoxicity by regulating oxidative stress, inflammation, and apoptosis in testis of ratsCrossref | GoogleScholarGoogle Scholar |

Allen T, Farley S, Draper J, Clement C, Polidoro B (2018). Variations in sorption of organochlorine pesticides and PCBs across six different plastic polymers. Journal of Environmental and Toxicological Studies 2, 1–6.
Variations in sorption of organochlorine pesticides and PCBs across six different plastic polymersCrossref | GoogleScholarGoogle Scholar |

Alves PR, Natal-da-luz T, Sousa JP, Cardoso EJ (2015). Ecotoxicological characterization of sugarcane vinasses when applied to tropical soils. The Science of the Total Environment 526, 222–232.
Ecotoxicological characterization of sugarcane vinasses when applied to tropical soilsCrossref | GoogleScholarGoogle Scholar |

Bakir A, Rowland SJ, Thompson RC (2014). Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditions. Environmental Pollution 185, 16–23.
Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditionsCrossref | GoogleScholarGoogle Scholar |

Barnes DK, Galgani F, Thompson RC, Barlaz M (2009). Accumulation and fragmentation of plastic debris in global environments. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences 364, 1985–1998.
Accumulation and fragmentation of plastic debris in global environmentsCrossref | GoogleScholarGoogle Scholar |

Bläsing M, Amelung W (2018). Plastics in soil: Analytical methods and possible sources. The Science of the Total Environment 612, 422–435.
Plastics in soil: Analytical methods and possible sourcesCrossref | GoogleScholarGoogle Scholar |

Blouin M, Hodson ME, Delgado EA, Baker G, Brussaard L, Butt KR, Dai J, Dendooven L, Peres G, Tondoh JE, Cluzeau D, Brun J (2013). A review of earthworm impact on soil function and ecosystem services. European Journal of Soil Science 64, 161–182.
A review of earthworm impact on soil function and ecosystem servicesCrossref | GoogleScholarGoogle Scholar |

Bradford M (1976). A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Analytical Biochemistry 72, 248–254.
A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye bindingCrossref | GoogleScholarGoogle Scholar |

Buege JA, Aust SD (1978). Microsomal lipid peroxidation. Methods in Enzymology 52, 302–310.
Microsomal lipid peroxidationCrossref | GoogleScholarGoogle Scholar |

Caetano AL, Goncalves F, Sousa JP, Cachada A, Pereira E, Duarte AC, Ferreira da Silva E, Pereira R (2012). Characterization and validation of a Portuguese natural reference soil to be used as substrate for ecotoxicological purposes. Journal of Environmental Monitoring 14, 925–936.
Characterization and validation of a Portuguese natural reference soil to be used as substrate for ecotoxicological purposesCrossref | GoogleScholarGoogle Scholar |

Cang T, Dai D, Yang D, Yu Y, Lv L, Cai L, Wang Q, Wang Y (2017). Combined toxicity of imidacloprid and three insecticides to the earthworm, Eisenia fetida (Annelida, Oligochaeta). Environmental Science and Pollution Research International 24, 8722–8730.
Combined toxicity of imidacloprid and three insecticides to the earthworm, Eisenia fetida (Annelida, Oligochaeta)Crossref | GoogleScholarGoogle Scholar |

Chae Y, An Y-J (2018). Current research trends on plastic pollution and ecological impacts on the soil ecosystem: A review. Environmental Pollution 240, 387–395.
Current research trends on plastic pollution and ecological impacts on the soil ecosystem: A reviewCrossref | GoogleScholarGoogle Scholar |

Clause J, Margerie P, Langlois E, Decaëns T, Forey E (2011). Fat but slim: criteria of seed attractiveness for earthworms. Pedobiologia 54, S159–S165.
Fat but slim: criteria of seed attractiveness for earthwormsCrossref | GoogleScholarGoogle Scholar |

Čolović MB, Krstić DZ, Lazarević-Pašti TD, Bondžić AM, Vasić VM (2013). Acetylcholinesterase inhibitors: pharmacology and toxicology. Current Neuropharmacology 11, 315–335.
Acetylcholinesterase inhibitors: pharmacology and toxicologyCrossref | GoogleScholarGoogle Scholar |

Correia B, Lourenço J, Marques S, Nogueira V, Gavina A, da Graça Rasteiro M, Antunes F, Mendo S, Pereira R (2017). Oxidative stress and genotoxicity of an organic and an inorganic nanomaterial to Eisenia andrei: SDS/DDAB nano-vesicles and titanium silicon oxide. Ecotoxicology and Environmental Safety 140, 198–205.
Oxidative stress and genotoxicity of an organic and an inorganic nanomaterial to Eisenia andrei: SDS/DDAB nano-vesicles and titanium silicon oxideCrossref | GoogleScholarGoogle Scholar |

Dai D, Tang J, Rose R, Hodgson E, Bienstock RJ, Mohrenweiser HW, Goldstein JA (2001). Identification of variants of CYP3A4 and characterization of their abilities to metabolize testosterone and chlorpyrifos. The Journal of Pharmacology and Experimental Therapeutics 299, 825–831.

de Bono M, Tobin DM, Davis MW, Avery L, Bargmann CI (2002). Social feeding in Caenorhabditis elegans is induced by neurons that detect aversive stimuli. Nature 419, 899–903.
Social feeding in Caenorhabditis elegans is induced by neurons that detect aversive stimuliCrossref | GoogleScholarGoogle Scholar |

De Silva PMCS, Pathiratne A, van Gestel CAM (2010). Toxicity of chlorpyrifos, carbofuran, mancozeb and their formulations to the tropical earthworm Perionyx excavatus. Applied Soil Ecology 44, 56–60.
Toxicity of chlorpyrifos, carbofuran, mancozeb and their formulations to the tropical earthworm Perionyx excavatusCrossref | GoogleScholarGoogle Scholar |

Derraik JGB (2002). The pollution of the marine environment by plastic debris: a review. Marine Pollution Bulletin 44, 842–852.
The pollution of the marine environment by plastic debris: a reviewCrossref | GoogleScholarGoogle Scholar |

Ellman GL, Courtney KD, Andres V, Feather-Stone RM (1961). A new and rapid colorimetric determination of acetylcholinesterase activity. Biochemical Pharmacology 7, 88–95.
A new and rapid colorimetric determination of acetylcholinesterase activityCrossref | GoogleScholarGoogle Scholar |

European Union (1986). Council Directive 86/278/EEC of 12 June 1986 on the protection of the environment, and in particular of the soil, when sewage sludge is used in agriculture. Official Journal of the European Communities L 181, 04/07/1986 P. 0006–0012.

Gavina A, Bouguerra S, Lopes I, Marques CR, Rasteiro MG, Antunes F, Rocha-Santos T, Pereira R (2016). Impact of organic nano-vesicles in soil: The case of sodium dodecyl sulphate/didodecyl dimethylammonium bromide. The Science of the Total Environment 547, 413–421.
Impact of organic nano-vesicles in soil: The case of sodium dodecyl sulphate/didodecyl dimethylammonium bromideCrossref | GoogleScholarGoogle Scholar |

Geyer R, Jambeck JR, Law KL (2017). Production, use, and fate of all plastics ever made. Science Advances 3, e1700782
Production, use, and fate of all plastics ever madeCrossref | GoogleScholarGoogle Scholar |

Gonçalves C, Alpendurada M (2005). Assessment of pesticide contamination in soil samples from an intensive horticulture area, using ultrasonic extraction and gas chromatography-mass spectrometry. Talanta 65, 1179–1189.
Assessment of pesticide contamination in soil samples from an intensive horticulture area, using ultrasonic extraction and gas chromatography-mass spectrometryCrossref | GoogleScholarGoogle Scholar |

Hodson ME, Duffus-Hodson CA, Clark A, Prendergast-Miller MT, Thorpe KL (2017). Plastic bag derived-microplastics as a vector for metal exposure in terrestrial invertebrates. Environmental Science & Technology 51, 4714–4721.
Plastic bag derived-microplastics as a vector for metal exposure in terrestrial invertebratesCrossref | GoogleScholarGoogle Scholar |

Horton AA, Walton A, Spurgeon DJ, Lahive E, Svendsen C (2017). Microplastics in freshwater and terrestrial environments: Evaluating the current understanding to identify the knowledge gaps and future research priorities. The Science of the Total Environment 586, 127–141.
Microplastics in freshwater and terrestrial environments: Evaluating the current understanding to identify the knowledge gaps and future research prioritiesCrossref | GoogleScholarGoogle Scholar |

Huerta Lwanga E, Gertsen H, Gooren H, Peters P, Salánki T, van der Ploeg M, Besseling E, Koelmans AA, Geissen V (2016). Microplastics in the terrestrial ecosystem: implications for Lumbricus terrestris (Oligochaeta, Lumbricidae). Environmental Science & Technology 50, 2685–2691.
Microplastics in the terrestrial ecosystem: implications for Lumbricus terrestris (Oligochaeta, Lumbricidae)Crossref | GoogleScholarGoogle Scholar |

Hurley RR, Lusher AL, Olsen M, Nizzetto L (2018). Validation of a method for extracting microplastics from complex, Organic-Rich, Environmental Matrices. Environmental Science & Technology 52, 7409–7417.
Validation of a method for extracting microplastics from complex, Organic-Rich, Environmental MatricesCrossref | GoogleScholarGoogle Scholar |

Kar SK, Choudhury I (2016). An empirical review on oxidative stress markers and their relevance in obsessive-compulsive disorder. International Journal of Nutrition, Pharmacology, Neurological Diseases 6, 139–145.
An empirical review on oxidative stress markers and their relevance in obsessive-compulsive disorderCrossref | GoogleScholarGoogle Scholar |

Karami A, Golieskardi A, Choo CK, Larat V, Galloway TS, Salamatinia B (2017). The presence of microplastics in commercial salts from different countries. Scientific Reports 7, 46173
The presence of microplastics in commercial salts from different countriesCrossref | GoogleScholarGoogle Scholar |

Karapanagioti HK, Werner D (2018). Sorption of hydrophobic organic compounds to plastics in the marine environment: sorption and desorption kinetics. In ‘The handbook of environmental chemistry’. (Eds H Takada, HK Karapanagioti) pp. 1–15. (Springer: Berlin)

Kasirajan S, Ngouajio M (2012). Polyethylene and biodegradable mulches for agricultural applications: a review. Agronomy for Sustainable Development 32, 501–529.
Polyethylene and biodegradable mulches for agricultural applications: a reviewCrossref | GoogleScholarGoogle Scholar |

Klein S, Dimzon IK, Eubeler J, Knepper TP (2018). Analysis, occurrence, and degradation of microplastics in the aqueous environment. In ‘Freshwater microplastics: the handbook of environmental chemistry’. (Eds M Wagner, S Lambert), Vol. 58, pp. 51–67. (Springer: Cham)

Kleinteich J, Seidensticker S, Marggrander N, Zarfl C (2018). Microplastics reduce short-term effects of environmental contaminants. Part II: polyethylene particles decrease the effect of polycyclic aromatic hydrocarbons on microorganisms. International Journal of Environmental Research and Public Health 15, 287
Microplastics reduce short-term effects of environmental contaminants. Part II: polyethylene particles decrease the effect of polycyclic aromatic hydrocarbons on microorganismsCrossref | GoogleScholarGoogle Scholar |

Koelmans AA, Besseling E, Shim WJ (2015). Nanoplastics in the aquatic environment: critical review. In ‘Marine anthropogenic litter’. (Eds M Bergmann, L Gutow, M Klages) pp. 325–340. (Springer: Cham)

Kyrikou I, Briassoulis D (2007). Biodegradation of agricultural plastic films: a critical review. Journal of Polymers and the Environment 15, 125–150.
Biodegradation of agricultural plastic films: a critical reviewCrossref | GoogleScholarGoogle Scholar |

Maaß S, Daphi D, Lehmann A, Rillig MC (2017). Transport of microplastics by two collembolan species. Environmental Pollution 225, 456–459.
Transport of microplastics by two collembolan speciesCrossref | GoogleScholarGoogle Scholar |

Markad VL, Kodam KM, Ghole VS (2012). Effect of fly ash on biochemical responses and DNA damage in earthworm, Dichogaster curgensis. Journal of Hazardous Materials 215–216, 191–198.
Effect of fly ash on biochemical responses and DNA damage in earthworm, Dichogaster curgensisCrossref | GoogleScholarGoogle Scholar |

Martin J, Lusher A, Thompson RC, Morley A (2017). The deposition and accumulation of microplastics in marine sediments and bottom water from the Irish Continental Shelf. Scientific Reports 7, 10772
The deposition and accumulation of microplastics in marine sediments and bottom water from the Irish Continental ShelfCrossref | GoogleScholarGoogle Scholar |

Muangphra P, Tharapoom K, Euawong N, Namchote S, Gooneratne R (2016). Chronic toxicity of commercial chlorpyrifos to earthworm Pheretima peguana. Environmental Toxicology 31, 1450–1459.
Chronic toxicity of commercial chlorpyrifos to earthworm Pheretima peguanaCrossref | GoogleScholarGoogle Scholar |

Nerin C, Batlle R (1999). Assessing the suitability of recycled plastics used as agricultural soil covers: migration study and experimental harvest. Journal of Agricultural and Food Chemistry 47, 285–293.
Assessing the suitability of recycled plastics used as agricultural soil covers: migration study and experimental harvestCrossref | GoogleScholarGoogle Scholar |

Nerin C, Tornés AR, Domeño C, Cacho J (1996). Absorption of pesticides on plastic films used as agricultural soil covers. Journal of Agricultural and Food Chemistry 44, 4009–4014.
Absorption of pesticides on plastic films used as agricultural soil coversCrossref | GoogleScholarGoogle Scholar |

Ng EL, Huerta Lwanga E, Eldridge SM, Johnston P, Hu HW, Geissen V, Chen D (2018). An overview of microplastic and nanoplastic pollution in agroecosystems. The Science of the Total Environment 627, 1377–1388.
An overview of microplastic and nanoplastic pollution in agroecosystemsCrossref | GoogleScholarGoogle Scholar |

Nizzetto L, Futter M, Langaas S (2016). Are agricultural soils dumps for microplastics of urban origin?. Environmental Science & Technology 50, 10777–10779.
Are agricultural soils dumps for microplastics of urban origin?Crossref | GoogleScholarGoogle Scholar |

Oakes KD, Van Der Kraak GJ (2003). Utility of the TBARS assay in detecting oxidative stress in white sucker (Catostomus commersoni) populations exposed to pulp mill effluent. Aquatic Toxicology (Amsterdam, Netherlands) 63, 447–463.
Utility of the TBARS assay in detecting oxidative stress in white sucker (Catostomus commersoni) populations exposed to pulp mill effluentCrossref | GoogleScholarGoogle Scholar |

OECD (1984). Test No. 207: Earthworm, Acute Toxicity Tests, OECD Guidelines for the Testing of Chemicals, Section 2. (OECD Publishing: Paris)

OECD (2004). Test No. 222: Earthworm Reproduction Test (Eisenia fetida/Eisenia andrei). (OECD Publishing: Paris)

Patinha C, Durães N, Dias AC, Pato P, Fonseca R, Janeiro A, Barriga F, Reis AP, Duarte A, Ferreira da Silva E, Sousa AJ, Cachada A (2018). Long-term application of the organic and inorganic pesticides in vineyards: Environmental record of past use. Applied Geochemistry 88, 226–238.
Long-term application of the organic and inorganic pesticides in vineyards: Environmental record of past useCrossref | GoogleScholarGoogle Scholar |

Pelosi C, Barot S, Capowiez Y, Hedde M, Vandelbucke F (2014). Pesticides and earthworms. A review. Agronomy for Sustainable Development 34, 199–228.
Pesticides and earthworms. A reviewCrossref | GoogleScholarGoogle Scholar |

Pereira JL, Antunes SC, Ferreira AC, Goncalves F, Pereira R (2010). Avoidance behavior of earthworms under exposure to pesticides: is it always chemosensorial?. Journal of Environmental Science and Health. Part B, Pesticides, Food Contaminants, and Agricultural Wastes 45, 229–232.
Avoidance behavior of earthworms under exposure to pesticides: is it always chemosensorial?Crossref | GoogleScholarGoogle Scholar |

PPDB (2018). Chlorpyrifos (Ref: OMS 971). Pesticide Properties Database. IUPAC global availability of information on agrochemicals. Agriculture & Environment Research Unit (AERU), University of Hertfordshire, United Kingdom. Available at http://sitem.herts.ac.uk/aeru/iupac/Reports/154.htm [verified 10 July 2018]

Ramos L, Berenstein G, Hughes EA, Zalts A, Montserrat JM (2015). Polyethylene film incorporation into the horticultural soil of small periurban production units in Argentina. The Science of the Total Environment 523, 74–81.
Polyethylene film incorporation into the horticultural soil of small periurban production units in ArgentinaCrossref | GoogleScholarGoogle Scholar |

Reinecke S, Reinecke A (2007). Biomarker response and biomass change of earthworms exposed to chlorpyrifos in microcosms. Ecotoxicology and Environmental Safety 66, 92–101.
Biomarker response and biomass change of earthworms exposed to chlorpyrifos in microcosmsCrossref | GoogleScholarGoogle Scholar |

Rillig MC (2012). Microplastic in terrestrial ecosystems and the soil?. Environmental Science & Technology 46, 6453–6454.
Microplastic in terrestrial ecosystems and the soil?Crossref | GoogleScholarGoogle Scholar |

Rillig MC, Ziersch L, Hempel S (2017a). Microplastic transport in soil by earthworms. Scientific Reports 7, 1362
Microplastic transport in soil by earthwormsCrossref | GoogleScholarGoogle Scholar |

Rillig MC, Ingraffia R, de Souza Machado AA (2017b). Microplastic incorporation into soil in agroecosystems. Frontiers of Plant Science 8, 1805
Microplastic incorporation into soil in agroecosystemsCrossref | GoogleScholarGoogle Scholar |

Rochman CM (2018). Microplastics research – from sink to source. Science 360, 28–29.
Microplastics research – from sink to sourceCrossref | GoogleScholarGoogle Scholar |

Rochman CM, Hoh E, Hentschel BT, Kaye S (2013). Long-term field measurement of sorption of organic contaminants to five types of plastic pellets: implications for plastic marine debris. Environmental Science & Technology 47, 1646–1654.
Long-term field measurement of sorption of organic contaminants to five types of plastic pellets: implications for plastic marine debrisCrossref | GoogleScholarGoogle Scholar |

Rodríguez-Seijo A, Pereira R (2017). Morphological and physical characterization of microplastics. In ‘Characterization and analysis of microplastics’. (Eds TAP Rocha-Santos, AC Duarte) pp. 49–66. (Elsevier: Amsterdam)

Rodríguez-Seijo A, Lourenço J, Rocha-Santos TAP, da Costa J, Duarte AC, Vala H, Pereira R (2017). Histopathological and molecular effects of microplastics in Eisenia andrei Bouché. Environmental Pollution 220, 495–503.
Histopathological and molecular effects of microplastics in Eisenia andrei BouchéCrossref | GoogleScholarGoogle Scholar |

Rodríguez-Seijo A, da Costa JP, Rocha-Santos T, Duarte AC, Pereira R (2018). Oxidative stress, energy metabolism and molecular responses of earthworms (Eisenia fetida) exposed to low-density polyethylene microplastics. Environmental Science and Pollution Research International,
Oxidative stress, energy metabolism and molecular responses of earthworms (Eisenia fetida) exposed to low-density polyethylene microplasticsCrossref | GoogleScholarGoogle Scholar | in press

Sanchez-Hernandez JC, Narvaez C, Sabat P, Martínez Mocillo S (2014). Integrated biomarker analysis of chlorpyrifos metabolism and toxicity in the earthworm Aporrectodea caliginosa. The Science of the Total Environment 490, 445–455.
Integrated biomarker analysis of chlorpyrifos metabolism and toxicity in the earthworm Aporrectodea caliginosaCrossref | GoogleScholarGoogle Scholar |

Shumway DL, Koide RT (1994). Seed preferences of Lumbricus terrestris L. Applied Soil Ecology 1, 11–15.
Seed preferences of Lumbricus terrestris LCrossref | GoogleScholarGoogle Scholar |

Steinmetz Z, Wollmann C, Schaefer M, Buchmann C, David J, Tröger J, Muñoz K, Frör O, Schaumann GE (2016). Plastic mulching in agriculture. Trading short-term agronomic benefits for long-term soil degradation?. The Science of the Total Environment 550, 690–705.
Plastic mulching in agriculture. Trading short-term agronomic benefits for long-term soil degradation?Crossref | GoogleScholarGoogle Scholar |

Teuten EL, Rowland SJ, Galloway TS, Thompson RC (2007). Potential for plastics to transport hydrophobic contaminants. Environmental Science & Technology 41, 7759–7764.
Potential for plastics to transport hydrophobic contaminantsCrossref | GoogleScholarGoogle Scholar |

Teuten EL, Saquing JM, Knappe DR, Barlaz MA, Jonsson S, Björn A, Rowland SJ, Thompson RC, Galloway TS, Yamashita R, Ochi D, Watanuki Y, Moore C, Viet PH, Tana TS, Prudente M, Boonyatumanond R, Zakaria MP, Akkhavong K, Ogata Y, Hirai H, Iwasa S, Mizukawa K, Hagino Y, Imamura A, Saha M, Takada H (2009). Transport and release of chemicals from plastics to the environment and to wildlife. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences 364, 2027–2045.
Transport and release of chemicals from plastics to the environment and to wildlifeCrossref | GoogleScholarGoogle Scholar |

Tomlin CDS (2006). ‘The pesticide manual, a world compendium, 14th edn.’ (British Crop Protection Council: Alton, Hampshire)

Venkateswara Rao J, Pavan YS, Madhavendra SS (2003). Toxic effects of chlorpyrifos on morphology and acetylcholinesterase activity in the earthworm, Eisenia foetida. Ecotoxicology and Environmental Safety 54, 296–301.
Toxic effects of chlorpyrifos on morphology and acetylcholinesterase activity in the earthworm, Eisenia foetidaCrossref | GoogleScholarGoogle Scholar |

Wang JH, Zhu LS, Liu W, Wang J, Xie H (2012). Biochemical responses of earthworm (Eisenia foetida) to the pesticides chlorpyrifos and fenvalerate. Toxicology Mechanisms and Methods 22, 236–241.
Biochemical responses of earthworm (Eisenia foetida) to the pesticides chlorpyrifos and fenvalerateCrossref | GoogleScholarGoogle Scholar |

Weithmann N, Möller JN, Löder MGJ, Piehl S, Laforsch C, Freitag R (2018). Organic fertilizer as a vehicle for the entry of microplastic into the environment. Science Advances 4, eaap8060
Organic fertilizer as a vehicle for the entry of microplastic into the environmentCrossref | GoogleScholarGoogle Scholar |

Woodall LC, Sanchez-Vidal A, Canals M, Paterson GLJ, Coppock R, Sleight V, Calafat A, Rogers AD, Narayanaswamy BE, Thompson RC (2014). The deep sea is a major sink for microplastic debris. Royal Society Open Science 1, 140317
The deep sea is a major sink for microplastic debrisCrossref | GoogleScholarGoogle Scholar |

Yang X, Bento CPM, Chen H, Zhang H, Xue S, Huerta Lwanga E, Zomer P, Ritsema CJ, Geissen V (2018). Influence of microplastic addition on glyphosate decay and soil microbial activities in Chinese loess soil. Environmental Pollution 242, 338–347.
Influence of microplastic addition on glyphosate decay and soil microbial activities in Chinese loess soilCrossref | GoogleScholarGoogle Scholar |

Zaller JG, Saxler N (2007). Selective vertical seed transport by earthworms: implications for the diversity of grassland ecosystems. European Journal of Soil Biology 43, S86–S91.
Selective vertical seed transport by earthworms: implications for the diversity of grassland ecosystemsCrossref | GoogleScholarGoogle Scholar |

Zhang GS, Liu YF (2018). The distribution of microplastics in soil aggregate fractions in southwestern China. The Science of the Total Environment 642, 12–20.
The distribution of microplastics in soil aggregate fractions in southwestern ChinaCrossref | GoogleScholarGoogle Scholar |

Zhang Q, Zhu L, Wang J, Xie H, Wang J, Han Y, Yang J (2013). Oxidative stress and lipid peroxidation in the earthworm Eisenia fetida induced by low doses of fomesafen. Environmental Science and Pollution Research International 20, 201–208.
Oxidative stress and lipid peroxidation in the earthworm Eisenia fetida induced by low doses of fomesafenCrossref | GoogleScholarGoogle Scholar |

Zhang S, Yang X, Gertsen H, Peters P, Salánki T, Geissen V (2018). A simple method for the extraction and identification of light density microplastics from soil. The Science of the Total Environment 616–617, 1056–1065.
A simple method for the extraction and identification of light density microplastics from soilCrossref | GoogleScholarGoogle Scholar |

Zhou SP, Duan CQ, Fu H, Chen YH, Wang XH, Yu ZF (2007). Toxicity assessment for chlorpyrifos-contaminated soil with three different earthworm test methods. Journal of Environmental Sciences (China) 19, 854–858.
Toxicity assessment for chlorpyrifos-contaminated soil with three different earthworm test methodsCrossref | GoogleScholarGoogle Scholar |

Zhu D, Bi QF, Xiang Q, Chen QL, Christie P, Ke X, Wu LH, Zhu YG (2018). Trophic predator-prey relationships promote transport of microplastics compared with the single Hypoaspis aculeifer and Folsomia candida. Environmental Pollution 235, 150–154.
Trophic predator-prey relationships promote transport of microplastics compared with the single Hypoaspis aculeifer and Folsomia candidaCrossref | GoogleScholarGoogle Scholar |

Zirbes L, Brostaux Y, Mescher M, Jason M, Haubruge E, Deneubourg J-L (2012). Self-Assemblage and Quorum in the Earthworm Eisenia fetida (Oligochaete, Lumbricidae). PLoS One 7, e32564
Self-Assemblage and Quorum in the Earthworm Eisenia fetida (Oligochaete, Lumbricidae)Crossref | GoogleScholarGoogle Scholar |

Zubris KAV, Richards BK (2005). Synthetic fibers as an indicator of land application of sludge. Environmental Pollution 138, 201–211.
Synthetic fibers as an indicator of land application of sludgeCrossref | GoogleScholarGoogle Scholar |