Mycorrhizas in South American Anthropic Environments

Pagano, Marcela C.; Falção, Newton Paulo de Souza; Weber, Olmar Baller; Correa, E.; Faggioli, Valeria Soledad; Grilli, Gabriel; Covacevich, Fernanda; Cabello, Marta Noemí

doi:10.1007/978-3-030-15228-4_17

Cited by 2 publications

(2 citation statements)

References 76 publications

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“…The climate of the region is Cwa type according to Köppen (humid subtropical with dry winter and hot summer, with well-de ned dry seasons from May to September and rainy seasons from October to April. Representative eld sites ): (1) undisturbed protected areas of Atlantic forest, selected for this study, located in the plain of the São Francisco River basin, in Brazil, were reported previously (Pagano et al 2012(Pagano et al , 2022. Soil properties were as follow: neutral pH 6.8 and OM: 0.77%, high Base saturation and moderated P content, average temperature of about 23°C, predominant precipitation in summer and dry winter.…”

Section: Methodsmentioning

confidence: 99%

Sustainable Restoration of Degraded Landscapes Improves Soil Glomalin Content

Yelikbayev,

Correa,

Duarte

et al. 2023

Preprint

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The rising use of plantations forwood and cropping systems for food, the agronomic pressures, and resource overexploitation, in addition to climate change constrains, need urgent efforts for restoration of the different vegetal covers. Thus, research in ecosystem restoration is rising worldwide as the perception that global change negatively affects ecosystem services as well as the above and belowground biodiversity. Among microorganisms, mycorrhizae and Rhizobia benefit and contribute to the natural regeneration of plant communities. Consequently, the study of mycorrhizas in natural ecosystems supplement with relevant information the restoration plans. The understanding that most plants are mycotrophic influences the rehabilitation efforts of varied vegetation types. We show here the ecosystem restoration with respect to the benefits of plant symbiosis. As an index of soil stabilization in the different sites glomalin content (Undisturbed= Restored > Disturbed), was the best predictor of restoration success.

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Section: Methodsmentioning

confidence: 99%

Sustainable Restoration of Degraded Landscapes Improves Soil Glomalin Content

Yelikbayev,

Correa,

Duarte

et al. 2023

Preprint

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“…The study of species interactions in tropical environments has been largely neglected (but see [8][9][10][11][12]). Most studies of co-occurrences have focused on groups of symbiotic organisms, such as trees and mycorrhizas [13][14][15] and trees and seed dispersers [16,17], and are largely centered around mutualism [18] and parasitism [19][20][21]. However, many other interactions among organisms may play a crucial role in biotic and/or abiotic interactions in the tropics, such as those related to nutrient cycling and organic matter decomposition.…”

Section: Introductionmentioning

confidence: 99%

Assessing Biotic and Abiotic Interactions of Microorganisms in Amazonia through Co-Occurrence Networks and DNA Metabarcoding

et al. 2021

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Species may co-occur due to responses to similar environmental conditions, biological associations, or simply because of coincident geographical distributions. Disentangling patterns of co-occurrence and potential biotic and abiotic interactions is crucial to understand ecosystem function. Here, we used DNA metabarcoding data from litter and mineral soils collected from a longitudinal transect in Amazonia to explore patterns of co-occurrence. We compared data from different Amazonian habitat types, each with a characteristic biota and environmental conditions. These included non-flooded rainforests (terra-firme), forests seasonally flooded by fertile white waters (várzeas) or by unfertile black waters (igapós), and open areas associated with white sand soil (campinas). We ran co-occurrence network analyses based on null models and Spearman correlation for all samples and for each habitat separately. We found that one third of all operational taxonomic units (OTUs) were bacteria and two thirds were eukaryotes. The resulting networks were nevertheless mostly composed of bacteria, with fewer fungi, protists, and metazoans. Considering the functional traits of the OTUs, there is a combination of metabolism modes including respiration and fermentation for bacteria, and a high frequency of saprotrophic fungi (those that feed on dead organic matter), indicating a high turnover of organic material. The organic carbon and base saturation indices were important in the co-occurrences in Amazonian networks, whereas several other soil properties were important for the co-exclusion. Different habitats had similar network properties with some variation in terms of modularity, probably associated with flooding pulse. We show that Amazonian microorganism communities form highly interconnected co-occurrence and co-exclusion networks, which highlights the importance of complex biotic and abiotic interactions in explaining the outstanding biodiversity of the region.

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Mycorrhizas in South American Anthropic Environments

Cited by 2 publications

References 76 publications

Sustainable Restoration of Degraded Landscapes Improves Soil Glomalin Content

Sustainable Restoration of Degraded Landscapes Improves Soil Glomalin Content

Assessing Biotic and Abiotic Interactions of Microorganisms in Amazonia through Co-Occurrence Networks and DNA Metabarcoding

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