Diversity of Arbuscular Mycorrhizal Fungi in an Amazon Environment after Mining

Caproni, Ana Lucy; Granha, José Rodolfo Dantas de Oliveira; Fornaciari, Ademir Junior; Nobre, Camila Pinheiro; Mendonça, Leticia Pastore; Berbara, Ricardo Luís Louro

doi:10.1590/2179-8087.022415

Cited by 9 publications

(7 citation statements)

References 20 publications

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“…Information about the recovery of areas that had their soil surface soil horizon by mining activities in the Caatinga biome is scarce, and the impact of this activity on rhizobia and AMF populations is poorly known (MERGULHÃO et al, 2010;CAPRONI et al, 2018). The hypothesis of the present study is that areas impacted by gravel exploration or disposal have not enough inoculum of rhizobia and AMF to colonize the introduced native plants.…”

Section: Introductionmentioning

confidence: 89%

Characterization of Rhizobia and Arbuscular Mycorrhizal Fungi in Areas Impacted by Gravel Mining in Brazil

et al. 2019

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On-shore oil exploration is one of the main economic activities in the semiarid region (Caatinga biome) of the state of Rio Grande do Norte (RN), Brazil. Gravel mining is an activity associated with oil exploration that causes environmental impacts. Gravel is a base-material for constructions, such as roads and pumpjack bases. The areas of gravel mining and other decommissioned areas where the gravel has been deposited must be revegetated with species native to the biome at end of the activity in the site. An efficient strategy for revegetation of degraded areas has been the planting of leguminous species that can associate with rhizobia and arbuscular mycorrhizal fungi (AMF). Nevertheless, the impact of mining activities on the autochthonous populations of these microorganisms is unknown. The objective of the present work is to characterize the density of rhizobia and AMF spores in four areas impacted by the oil exploration in RN when compared to non-impacted adjacent areas. Gravel samples were collected in dry and rainy seasons in two mining areas: one in a pumpjack base, and one in a waste disposal area. Surface soil (topsoil) samples were collected in adjacent areas with native Caatinga vegetation. Assays were carried out to evaluate the most probable number (MPN) of rhizobia and to identify the type and density of arbuscular mycorrhizal fungi (AMF), using rhizobia trap plants Mimosa tenuiflora (Mart.) Benth. and Mimosa caesalpiniifolia Benth. The MPN of rhizobia was low in all areas, but higher in the rainy season. The highest amount and diversity of AMF spores were found in the dry season. Among the symbiotic microorganisms studied, the AMF presented lower densities in the evaluated areas when compared to those in the adjcent native vegetation areas, denoting the impact of this activity.

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Section: Introductionmentioning

confidence: 89%

Characterization of Rhizobia and Arbuscular Mycorrhizal Fungi in Areas Impacted by Gravel Mining in Brazil

et al. 2019

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“…Acaulospora mellea, the only one of the genus Acaulospora indicated for areas of early and mature secondary forest was also an indicator for other regenerating areas in the Atlantic Forest (Rodrigues et al 2021). Species of Acaulospora are prevalent in early stages of revegetation (Caproni et al 2018) and also in tropical rainforest (Lovelock et al 2003). Species of this genus support acidic soils, as in tropical forests, and show resilience to environmental disturbances (Hart & Reader 2002;Winagraski et al 2019).…”

Section: Discussionmentioning

confidence: 99%

Succession stages and soil attributes influence the structure of arbuscular mycorrhizal fungi communities in the Atlantic Forest

Silva,

Assis,

Passos

et al. 2023

Acta Bot. Bras.

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The objective of this study was to determine the structure, diversity, composition and drivers of AMF communities in succession areas of Atlantic Forest. Soil and root samples were collected in three natural ecosystems (mature rainforests, early and late secondary forests) with three areas on each ecosystem. In total, 38 AMF taxa were identified in field samples and three more in trap cultures with a greater richness of Acaulospora and Glomus. Based on a richness estimator, 70% of the AMF species were identified. Highest rates of root colonization and number of glomerospores were recorded in the early secondary forest. AMF species diversity differed between early and late forests. The main drivers of AMF distribution were coarse and fine sand, silt, Al, P, Na, pH and base saturation. The greatest number of exclusive species was recorded in the mature rainforests. The distribution of AMF communities was influenced by different successional stages and some soil attributes.

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“…In our study, Ambispora leptoticha was one of the few VT recovered only in degraded pastures. A. leptoticha is common in tropical environments [14,48], and frequently recovered in Amazonian soils [49,50] of disturbed areas such as pastures, crops, recovering mining areas, and young secondary forests [15,50,51]. Therefore, it could be considered a generalist AM fungal species in tropical soils.…”

Section: Discussionmentioning

confidence: 99%

“…Glomus was usually the dominant genus in the soil-borne AM fungal community during the young successional stages of the chronosequence, but its presence in the soil decreased over time (from 56.6% in degraded pastures to 9.3% in forest soils), and other AM fungal genus such as Paraglomus increases its representativeness in the AM fungal community (from 30.3% in degraded pastures to 90.2% in forest soils). Glomus has been reported as one of the dominant genera in successional forest stages in the Amazon region [15,18,51]. Glomus is a very diverse genus with proliferous spore-producer species.…”

Section: Discussionmentioning

confidence: 99%

Changes in Soil-Borne Communities of Arbuscular Mycorrhizal Fungi during Natural Regrowth of Abandoned Cattle Pastures Are Indicative of Ecosystem Restoration

et al. 2021

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Natural restoration of ecosystems includes the restoration of plant-microbial associations; however, few studies had documented those changes in tropical ecosystems. With the aim to contribute to understand soil microbial changes in a natural regrowth succession of degraded pastures that were left for natural restoration, we studied changes in arbuscular mycorrhizal (AM) fungal communities. Arbuscular mycorrhizal fungi (AMF) establish a mutualistic symbiosis with plants, improving plant nutrition. Amplification of the small subunit rRNA with specific primers and subsequent Illumina sequencing were used to search soil-borne AM fungal communities in four successional natural regrowth stages in two landscapes (hill and mountain) with soil differences, located in the Andean-Amazonian transition. Molecular results corroborated the results obtained previously by spores-dependent approaches. More abundance and virtual taxa of AMF exist in the soil of degraded pastures and early natural regrowth stages than in old-growth or mature forest soils. Although changes in AM fungal communities occurred similarly over the natural regrowth chronosequence, differences in soil texture between landscapes was an important soil feature differentiating AM fungal community composition and richness. Changes in soil-borne AM fungal communities reflect some signals of environmental restoration that had not been described before, such as the reduction of Glomus dominance and the increase of Paraglomus representativeness in the AM fungal community during the natural regrowth chronosequence.

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Diversity of Arbuscular Mycorrhizal Fungi in an Amazon Environment after Mining

Cited by 9 publications

References 20 publications

Characterization of Rhizobia and Arbuscular Mycorrhizal Fungi in Areas Impacted by Gravel Mining in Brazil

Characterization of Rhizobia and Arbuscular Mycorrhizal Fungi in Areas Impacted by Gravel Mining in Brazil

Succession stages and soil attributes influence the structure of arbuscular mycorrhizal fungi communities in the Atlantic Forest

Changes in Soil-Borne Communities of Arbuscular Mycorrhizal Fungi during Natural Regrowth of Abandoned Cattle Pastures Are Indicative of Ecosystem Restoration

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