Degradation of conventional and biobased plastics in soil under contrasting environmental conditions

Beltrán-Sanahuja, Ana; Benito-Kaesbach, Alba; Sánchez-García, Natalia; Sanz‐Lázaro, Carlos

doi:10.1016/j.scitotenv.2021.147678

Cited by 37 publications

(9 citation statements)

References 45 publications

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“…Through an in situ manipulative experiment simulating different soil scenarios, Beltrán‐Sanahuja et al . (2021) found that the weight loss of PET and PA was less than 2%. Even though the degradation rate of these conventional polymer was substantially low, considering the high proportion of carbon in these polymers, they may contribute to the CO 2 emissions.…”

Section: Resultsmentioning

confidence: 99%

Microplastics reduce soil microbial network complexity and ecological deterministic selection

Shi

Sun

Xiang

et al. 2022

Environmental Microbiology

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Microplastics have been proposed as emerging threats for terrestrial systems as they may potentially alter the physicochemical/biophysical soil environments. Due to the variety of properties of microplastics and soils, the microplastic-induced effects in soil ecosystems are greatly manifold. Here, we studied effects of three polymer microplastics (polyamide-6, polyethylene, and polyethylene terephthalate) on soil properties with four different soil types. The success patterns, interaction relationships, and assembly processes of soil bacterial communities were also studied. Microplastics have the potential to promote CO 2 emissions and enhance the soil humification. Even though microplastics did not significantly alter the diversity and composition of the soil microbial community, the application of microplastics decreased the network complexity and stability, including network size, connectivity, and the number of module and keystone species. The bacterial community assembly was governed by deterministic selection (77.3%-90.9%) in all treatments, while microplastics increased the contribution of stochastic processes from 9.1% in control to 13.6%-22.7%. The neutral model results also indicated most of the bacterial taxa were present in the predicted neutral region (approximately 98%), suggesting the importance of stochastic processes. These findings provided a fundamental insight in understanding the effects of microplastics on soil ecosystems.

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Section: Resultsmentioning

confidence: 99%

Microplastics reduce soil microbial network complexity and ecological deterministic selection

Shi

Sun

Xiang

et al. 2022

Environmental Microbiology

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“…119 Even within the same types of environment, local conditions can affect the kinetics of degradation significantly, with studies highlighting that the degradation of conventional materials such as polyethylene, PET and PLA, in a terrestrial environment such as soil are dependent on temperature and water availability to modulate polymer degradation. 120 Weight losses of less than 2% were reported for samples of these polymers after evaluation of one year of in situ manipulative experiments simulating different soil conditions.…”

Section: Mechanisms Of Biodegradationmentioning

confidence: 99%

Designing biodegradable alternatives to commodity polymers

Fiandra,

Shaw,

Starck

et al. 2023

Chem. Soc. Rev.

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“…This was not the case for the conventional plastic mulch-associated bacterial community. Both conventional and biodegradable plastics were degraded, more or less rapidly, in smaller particles called microplastics (MPs) via biodegradation, photolysis and hydrolysis (Beltrán-Sanahuja et al 2021 , Somanathan et al 2022 ). Some recent studies revealed an effect of MPs on the abundance and the diversity of soil microbial communities.…”

Section: Weed Management Tillage and Mulchingmentioning

confidence: 99%

Agroecological transition: towards a better understanding of the impact of ecology-based farming practices on soil microbial ecotoxicology

Vermeire,

Thiour-Mauprivez,

De Clerck

2024

FEMS Microbiology Ecology

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Alternative farming systems have developed since the beginning of industrial agriculture. Organic, biodynamic, conservation farming, agroecology and permaculture, all share a grounding in ecological concepts and a belief that farmers should work with nature rather than damage it. As ecology-based agricultures rely greatly on soil organisms to perform the functions necessary for agricultural production, it is thus important to evaluate the performance of these systems through the lens of soil organisms, especially soil microbes. They provide numerous services to plants, including growth promotion, nutrient supply, tolerance to environmental stresses and protection against pathogens. An overwhelming majority of studies confirm that ecology-based agricultures are beneficial for soil microorganisms. However, three practices were identified as posing potential ecotoxicological risks: the recycling of organic waste products, plastic mulching, and pest and disease management with biopesticides. The two first because they can be a source of contaminants; the third because of potential impacts on non-target microorganisms. Consequently, the development strategies to allow a safe recycling of the increasingly growing organic matter stocks produced in cities and factories, and the assessment of the ecotoxicological impact of biopesticides on non-target soil microorganisms, represent two challenges that ecology-based agricultural systems will have to face in the future.

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Degradation of conventional and biobased plastics in soil under contrasting environmental conditions

Cited by 37 publications

References 45 publications

Microplastics reduce soil microbial network complexity and ecological deterministic selection

Microplastics reduce soil microbial network complexity and ecological deterministic selection

Designing biodegradable alternatives to commodity polymers

Agroecological transition: towards a better understanding of the impact of ecology-based farming practices on soil microbial ecotoxicology

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