Archaea diversity in vegetation gradients from the Brazilian Cerrado

Araújo, Ademir Sérgio Ferreira de; Mendes, Lucas William; Bezerra, Walderly Melgaço; Nunes, Luís Alfredo Pinheiro Leal; Lyra, Maria do Carmo Catanho Pereira de; Figueiredo, Márcia do Vale Barreto; Melo, Vânia Maria Maciel

doi:10.1016/j.bjm.2017.08.010

Cited by 19 publications

(12 citation statements)

References 38 publications

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“…As expected, Thaumarchaeota and Euryarchaeota were the most abundant phyla found in soils with application of CTS (Fig. 1), which corroborates previous studies that reported these phyla as dominant in several soils 13–15 . Interestingly, the phylum Thaumarchaeota was dominant in all samples and matches the fact that this phylum is found in high abundance in both marine and soils environments 16,17 .…”

Section: Discussionsupporting

confidence: 92%

Dynamics of archaeal community in soil with application of composted tannery sludge

Miranda

Mendes²,

Lemos³

et al. 2019

Sci Rep

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Application of composted tannery sludge (CTS) could promote a shift in the structure of soil microbial communities. Although the effect of CTS on bacterial community has been studied, it is unclear how the composition and diversity of archaeal community respond to CTS amendment and which environmental factors drive the community over time. Here, we hypothesize that the Archaea structure and composition respond to CTS amendment over the time. CTS had been previously applied annually along 6 years and this assessment occurred for 180 days following the application in the 7 th year by using different rates (0, 2.5, 5, 10 and 20 ton ha −1 ). We used amplicon 16S rRNA sequencing to assess the changes in the structure of the archaeal community. Thaumarchaeota and Euryarchaeota were the most abundant phyla found in soils with application of CTS, with Thaumarchaeota dominating the sequences in all samples with relative abundances of >98%. We observed a decreasing trend on the archaeal diversity over the time with increasing CTS application rate, together with an increase in the community similarity. The redundancy analyses (RDA) explained 43% of the total variation in operational taxonomic units and identified Na, pH, Cr and P as the main drivers of the archaeal community over time after application of highest CTS rates. CTS application changes the structure of Archaea community, with significant increase of Thaumarchaeota and Aenigmarchaeota groups, which can be further explored for its biotechnological use in contaminated soils.

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Section: Discussionsupporting

confidence: 92%

Dynamics of archaeal community in soil with application of composted tannery sludge

Miranda

Mendes²,

Lemos³

et al. 2019

Sci Rep

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“…This is in line with patterns observed for other microbiome components, i.e. bacteria 13 , 15 , 18 , archaea 16 and fungi 17 , 18 . These patterns can be attributed to abiotic differences, such as lower fertility and soil moisture, but higher acidity and soil temperature, in the grass compared to the tree zone.…”

Section: Discussionsupporting

confidence: 90%

“…These patterns can be attributed to abiotic differences, such as lower fertility and soil moisture, but higher acidity and soil temperature, in the grass compared to the tree zone. Abiotic differences were shown to drive above-ground plant community-dynamics across the Cerrado 39 , 40 , and therefore likely also belowground communities 13 , 16 , 17 . In line with other studies, we show that a combination of multiple abiotic factors drive protist communities, with soil moisture being the principle factor 28 , 29 .…”

Section: Discussionmentioning

confidence: 99%

“…Non-random co-occurrence analyses were performed using SparCC, a tool capable of estimating correlation values from compositional data 67 . For this, data tables affiliated to family level, including 18S rRNA data (protists, fungi, nematodes and animal) and 16S rRNA data (bacteria 15 and archaea 16 ), were used in the analysis. We performed the analyses on family level as previously suggested to remove artefacts from inaccurate annotation of lower taxonomic levels and the discrepancy of OTUs to sometimes consist of multiple species, while sometimes species can contain multiple OTUs 68 .…”

Section: Methodsmentioning

confidence: 99%

“…Increasing knowledge on soil biodiversity is obtained from more agriculture dominated regions, especially Europe and North America 11 , 12 , while the soil biodiversity in southern hemisphere soils, such as the tropical Cerrado, is much less studied. Only recently have microbial groups, including bacteria 13 – 15 , archaea 16 and fungi 17 , 18 , been investigated in the Cerrado. These studies have revealed differences in the community composition of microbial groups between the four vegetation zones with diversity increasing from primary grass to climax tree vegetation.…”

Section: Introductionmentioning

confidence: 99%

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Protist species richness and soil microbiome complexity increase towards climax vegetation in the Brazilian Cerrado

et al. 2018

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Biodiversity underlies ecosystem functioning. While aboveground biodiversity is often well studied, the belowground microbiome, in particular protists, remains largely unknown. Indeed, holistic insights into soil microbiome structures in natural soils, especially in hyperdiverse biomes such as the Brazilian Cerrado, remain unexplored. Here, we study the soil microbiome across four major vegetation zones of the Cerrado, ranging from grass-dominated to tree-dominated vegetation with a focus on protists. We show that protist taxon richness increases towards the tree-dominated climax vegetation. Early successional habitats consisting of primary grass vegetation host most potential plant pathogens and least animal parasites. Using network analyses combining protist with prokaryotic and fungal sequences, we show that microbiome complexity increases towards climax vegetation. Together, this suggests that protists are key microbiome components and that vegetation succession towards climax vegetation is stimulated by higher loads of animal and plant pathogens. At the same time, an increase in microbiome complexity towards climax vegetation might enhance system stability.

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Grazing exclusion regulates bacterial community in highly degraded semiarid soils from the Brazilian Caatinga biome

et al. 2021

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Grazing exclusion has been applied as a suitable strategy for soil conservation worldwide, mainly on semiarid soils. However, it is unclear how grazing exclusion reduces the negative effects of overgrazing on the microbial community in the Caatinga biome. In our study, we assessed the bacterial community under three different soil managements in a semiarid region of the Brazilian Caatinga biome, as follows: (a) Native Caatinga vegetation (natural); (b) grazing exclusion (exclusion); and(c) overgrazing (grazed). The bacterial community was assessed through the sequencing of the V4 region of the 16S rRNA gene and analyzed soil chemical and physical properties were correlated with the bacterial community structure. Our results demonstrate that exclusion increases the content of soil carbon and nitrogen, and bacterial diversity, while grazed showed a reduction of 31 and 43% in organic C, compared to exclusion and natural, respectively. However, the changes in bacterial diversity were more expressive in a specific site (No. 1), suggesting that exclusion strategy could be a context-dependent and complex approach to protecting or improving Caatinga soils. Moreover, grazed areas might restrain the potential of bacterial diversity to sustain ecosystem functions since nonbeneficial elements increased in grazed treatments, which presented a negative correlation with the bacterial community. Our study provides novel evidence that high-intensity disturbance by overgrazing could not only reduce soil fertility but it may also restrain bacterial composition, with implications on ecosystem functioning. The Caatinga soil microbiome may be unable to maintain ecosystem services such as plant and animals' development under overgrazing management.

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Archaea diversity in vegetation gradients from the Brazilian Cerrado

Cited by 19 publications

References 38 publications

Dynamics of archaeal community in soil with application of composted tannery sludge

Dynamics of archaeal community in soil with application of composted tannery sludge

Protist species richness and soil microbiome complexity increase towards climax vegetation in the Brazilian Cerrado

Grazing exclusion regulates bacterial community in highly degraded semiarid soils from the Brazilian Caatinga biome

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