Arbuscular mycorrhizal fungi along secondary forest succession at the eastern periphery of Amazonia: Seasonal variability and impacts of soil fertility

reyes, henry alexander; Ferreira, Paula Fernanda Alves; Silva, Luana Corrêa; Costa, Marlon Gomes da; Nobre, Camila Pinheiro; Gehring, Christoph

doi:10.1016/j.apsoil.2018.12.013

Cited by 41 publications

(26 citation statements)

References 71 publications

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“…Another approach stipulates that variations across different locations reflect to large extents the dynamics at a single location, at different times. This principle where spatial variation is tantamount to temporal variation has been observed in many different contexts, such as in astrophysics where larger distances are interpreted as reflecting more ancient times [21], and in forest stage succession [22][23][24], ecological communities [25] and biomolecules such as those involved in ribosomes [26][27][28][29][30][31]. The principle is also applied in the renown Haeckelian statement "ontogeny recapitulates phylogeny" [32,33].…”

Section: Intrinsic Vs Extrinsic Constraintsmentioning

confidence: 99%

Unpredictable, Counter-Intuitive Geoclimatic and Demographic Correlations of COVID-19 Spread Rates

Seligmann

Vuillerme

Demongeot

2021

Biology

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We present spread parameters for first and second waves of the COVID-19 pandemic for USA states, and for consecutive nonoverlapping periods of 20 days for the USA and 51 countries across the globe. We studied spread rates in the USA states and 51 countries, and analyzed associations between spread rates at different periods, and with temperature, elevation, population density and age. USA first/second wave spread rates increase/decrease with population density, and are uncorrelated with temperature and median population age. Spread rates are systematically inversely proportional to those estimated 80–100 days later. Ascending/descending phases of the same wave only partially explain this. Directions of correlations with factors such as temperature and median age flip. Changes in environmental trends of the COVID-19 pandemic remain unpredictable; predictions based on classical epidemiological knowledge are highly uncertain. Negative associations between population density and spread rates, observed in independent samples and at different periods, are most surprising. We suggest that systematic negative associations between spread rates 80–100 days apart could result from confinements selecting for greater contagiousness, a potential double-edged sword effect of confinements.

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Section: Intrinsic Vs Extrinsic Constraintsmentioning

confidence: 99%

Unpredictable, Counter-Intuitive Geoclimatic and Demographic Correlations of COVID-19 Spread Rates

Seligmann

Vuillerme

Demongeot

2021

Biology

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“…Once this happens, the process of succession starts (Smith et al 2015) and over time, the original above-and belowground properties are recovered with older plots being generally more similar to the original vegetation than the youngest ones are in terms of aboveground biodiversity (Bu et al 2014) or microbial composition (Poosakkannu et al 2017). However, the composition, abundance, and diversity of fungi has not been found to have any correlation with plot age (Leal et al 2013;Reyes et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Changes in the Abundance and Composition of a Microbial Community Associated with Land Use Change in a Mexican Tropical Rain Forest

Flores‐Rentería

Sánchez-Gallén

Morales-Rojas

et al. 2020

J Soil Sci Plant Nutr

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Land use change (LUC) has important effects on the aboveground biota, mainly by altering richness and diversity, as well as ecosystem functioning. However, the effects of LUC on abiotic and biotic soil properties need to be assessed to determine recovery potential when the original vegetation is restored. The Los Tuxtlas tropical rain forest landscape in Veracruz, Mexico, offers a suitable framework for testing this. To assess the effect of LUC on the microbial community of this tropical rain forest landscape, we analyzed the whole-cell fatty acid profile of the microbial community and physicochemical properties of soils from four types of land use: crops, pastures, secondary forest, and primary tropical rain forest for the dry and rainy seasons. Regardless of season, the microbial data grouped according to land use. The composition of the microbial community was correlated with soil pH in the dry season, and with nitrate, soil organic matter, and available phosphorus concentration in the rainy season. Land use affects the abundance of the microbial community as a function of seasonal variation. In comparison with the microbial community in primary and secondary forest, that of crops and pastures was more greatly affected by seasonal variation. In fact, there were no significant differences between the primary forests or among secondary forests of different ages. These results may indicate a capacity for fast recovery (5 years or less) by the microbial community upon forest regeneration.

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“…Glomus was the dominant genus, representing 66% of the total AM fungal community, followed by Acaulospora, Paraglomus, and Archaeospora. Glomus and Acaulospora were reported previously as frequent genera associated with rubber [9,10], and the main genera composing the AM fungal community of Amazon soils [46][47][48].…”

Section: Discussionmentioning

confidence: 75%

Arbuscular Mycorrhization in Colombian and Introduced Rubber (Hevea brasiliensis) Genotypes Cultivated on Degraded Soils of the Amazon Region

2021

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Rubber (Hevea brasiliensis, (Willd. Ex Adr. de Juss) Muell. Arg, Euphorbiaceae) is an important commercial latex-producing plant. Commercially, rubber is reproduced from a limited number of grifting genotypes. New promising genotypes have been selected to replace traditional genotypes. In addition, rubber has been promoted to recuperate Amazon soils degraded by extensive cattle ranching. Arbuscular mycorrhizal (AM) symbiosis is an important alternative for improving plant nutrition in rubber trees and recuperating degraded soils, but AM fungal communities on different plantations and in rubber genotypes are unknown. Spore abundance, root colonization and AM fungal community composition were evaluated in rubber roots of Colombian and introduced genotypes cultivated in degraded soils with different plantation types. Traditional (spore isolation and description; clearing and staining roots) and molecular techniques (Illumina sequencing) were used to assess AM fungi. Rubber roots hosted a diverse AM fungal community of 135 virtual taxa (VT) in 13 genera. The genus Glomus represented 66% of the total AM fungal community. Rubber genotype did not affect the arbuscular mycorrhization, hosting similar AM fungal communities. The composition of the AM fungal community on old and young rubber plantations was different. Diversity in AM fungi in rubber roots is an important characteristic for restoring degraded soils.

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Arbuscular mycorrhizal fungi along secondary forest succession at the eastern periphery of Amazonia: Seasonal variability and impacts of soil fertility

Cited by 41 publications

References 71 publications

Unpredictable, Counter-Intuitive Geoclimatic and Demographic Correlations of COVID-19 Spread Rates

Unpredictable, Counter-Intuitive Geoclimatic and Demographic Correlations of COVID-19 Spread Rates

Changes in the Abundance and Composition of a Microbial Community Associated with Land Use Change in a Mexican Tropical Rain Forest

Arbuscular Mycorrhization in Colombian and Introduced Rubber (Hevea brasiliensis) Genotypes Cultivated on Degraded Soils of the Amazon Region

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