Effects of Long-Term Heavy Metal Contamination on Soil Fungi in the Mediterranean Area

Pasqualetti, Marcella; Mulas, Bonaria; Canzonetti, Giada; Benedetti, Antonio; Tempesta, Sabrina

doi:10.7872/crym.v33.iss1.2012.043

Cited by 14 publications

(7 citation statements)

References 26 publications

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“…not directly correlated). The taxonomic diversity of the cultivable fungi colonizing AH n soils (Table , see full details in http://onlinelibrary.wiley.com/doi/10.1111/1462-2920.12837/suppinfo) reasonably matches previous reports on soils from similar habitats (Orgiazzi et al ., ; Siles et al ., ) or with comparable properties (Pasqualetti et al ., ). Ascomycota, particularly penicillia, typically dominate, as key decomposers, soils with a low abundance of lignin (Ma et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Understanding fungal functional biodiversity during the mitigation of environmentally dispersed pentachlorophenol in cork oak forest soils

Varela

Martins

Núñez

et al. 2015

Environmental Microbiology

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Pentachlorophenol is globally dispersed and contamination of soil with this biocide adversely affects its functional biodiversity, particularly of fungi -key colonisers. Their functional role as a community is poorly understood, although a few pathways have been already elucidated in pure cultures. This constitutes here our main challenge -elucidate how fungi influence the pollutant mitigation processes in forest soils.Circumstantial evidence exists that cork oak forests in N.W. Tunisia -economically critical managed forests, are likely to be contaminated with pentachlorophenol but the scientific evidence has previously been lacking. Our data illustrate significant forest contamination through the detection of undefined active sources of pentachlorophenol. By solving the taxonomic diversity and the pentachlorophenol-derived metabolomes of both the cultivable fungi and the fungal community we demonstrate here that most strains (predominantly penicillia) participate in the pollutant biotic degradation. They form a array of degradation intermediates and by-products, including several hydroquinone, resorcinol and catechol derivatives, either chlorinated or not.The degradation pathway of the fungal community includes uncharacterised derivatives, e.g. tetrachloroguaiacol isomers. Our study highlights fungi key role in the mineralisation and short lifetime of pentachlorophenol in forest soils and provide novel tools to monitor its degradation in other fungi dominated food-webs.

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Section: Discussionmentioning

confidence: 97%

Understanding fungal functional biodiversity during the mitigation of environmentally dispersed pentachlorophenol in cork oak forest soils

Varela

Martins

Núñez

et al. 2015

Environmental Microbiology

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“…Literature surrounding soil fungal community responses to heavy metal contamination is limited, with more focus on the bacterial response. However, increased fungal diversity in moderate soil heavy metal contamination has been recorded (Pasqualetti et al, 2012;Lin et al, 2020). It is possible that the observed increase in the number of fungal species could be due to a fungal stress response, in which heavy metals inhibited the growth of otherwise dominant soil fungi, allowing less competitive species to survive (Abdel-Azeem et al, 2007).…”

Section: Diversity and Community Structurementioning

confidence: 99%

The Impact of Bio-Based Fertilizer Integration Into Conventional Grassland Fertilization Programmes on Soil Bacterial, Fungal, and Nematode Communities

Ryan

Karpinska

Forrestal

et al. 2022

Front. Sustain. Food Syst.

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Phosphorus (P) is an essential plant macro-nutrient applied to soil in agriculture, mainly sourced from non-renewable mined phosphate-rock, of which readily accessible reserves are currently under pressure, while global food demand continues to grow. Meanwhile, an abundance of P is lost in waste-streams. Hence, bio-based fertilizers are increasingly produced using nutrient-recovery technologies and evaluated as a sustainable fertilizer alternative. However, there is little knowledge of how these products affect soil microorganisms. In this study, four new phosphate bio-based fertilizers (two struvite and two incinerator ashes) were assessed in permanent grassland-plots to understand their impact on soil bacterial, fungal, and nematode community responses. The experiment consisted of 40 plots (each 6 × 2 m2) of 8 treatments (2 struvite, 2 ash, cattle slurry, 100% mineral fertilizer, zero P fertilizer, and a control without fertilization) with 5 replications arranged in a randomized complete block design. Community data were obtained by amplicon sequencing of DNA extracted from soil samples and subsequent analysis of community composition, diversity, structure and influencing environmental variables. Diversity of the soil microorganisms was maintained by all bio-based fertilizer treatments. Results showed that soil bacterial, fungal, and nematode communities of the struvite-treatments were similar to those in 100% mineral treatment. Communities in ash-treatments were more disturbed in their compositions, abundances and structures, possibly due to their high pH and heavy metal content. From canonical correspondence analysis, available P, K, and Mg, as well as plant P uptake and biomass yield, were identified as factors significantly influencing bacterial and nematode communities across different treatment groups. In particular, the abundance of environmental disturbance sensitive nematodes (e.g., Dorylaimida) was significantly reduced by one of the ash products. Overall, results indicate that both struvites are benign to soil bacterial, fungal, and nematode communities and can be safely applied as a source of renewable P to meet crop nutrition requirement. The ash products require further investigations before recommending their regular application as fertilizer. As the application of novel bio-based fertilizers will increase in the foreseeable future, the findings of this study would be valuable to feed into developing environmental risk assessment protocols.

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“…They reduce the microbial activity (Lorenz et al 2006;Oliveira and Pampulha 2006), diversity (Hassan et al 2011;, and abundance Pasqualetti et al 2012). However soil functioning is a result of tight interactions between microorganisms, plants, and soil macrofauna.…”

Section: Interactions Between Earthworms and Soil Microorganismsmentioning

confidence: 99%

Heavy Metal Contamination of Soils

Sherameti¹,

Varma²

2015

Soil Biology

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Effects of Long-Term Heavy Metal Contamination on Soil Fungi in the Mediterranean Area

Cited by 14 publications

References 26 publications

Understanding fungal functional biodiversity during the mitigation of environmentally dispersed pentachlorophenol in cork oak forest soils

Understanding fungal functional biodiversity during the mitigation of environmentally dispersed pentachlorophenol in cork oak forest soils

The Impact of Bio-Based Fertilizer Integration Into Conventional Grassland Fertilization Programmes on Soil Bacterial, Fungal, and Nematode Communities

Heavy Metal Contamination of Soils

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