Surendra Vikram
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View article: Novel adaptive immune systems in pristine Antarctic soils
Novel adaptive immune systems in pristine Antarctic soils Open
Antarctic environments are dominated by microorganisms, which are vulnerable to viral infection. Although several studies have investigated the phylogenetic repertoire of bacteria and viruses in these poly-extreme environments with freezin…
View article: With a pinch of salt: metagenomic insights into Namib Desert salt pan microbial mats and halites reveal functionally adapted and competitive communities
With a pinch of salt: metagenomic insights into Namib Desert salt pan microbial mats and halites reveal functionally adapted and competitive communities Open
Salt pans or playas, which are saline-rich springs surrounded by halite evaporates in arid environments, have played an essential role in landscape erosion during the formation of the Namib Desert and are numerous in its central region. In…
View article: Expanding Antarctic biogeography: microbial ecology of Antarctic island soils
Expanding Antarctic biogeography: microbial ecology of Antarctic island soils Open
The majority of islands surrounding the Antarctic continent are poorly characterized in terms of microbial macroecology due to their remote locations, geographical isolation and access difficulties. The 2016/2017 Antarctic Circumnavigation…
View article: Soil fungal diversity and assembly along a xeric stress gradient in the central Namib Desert
Soil fungal diversity and assembly along a xeric stress gradient in the central Namib Desert Open
The Namib Desert of south-western Africa is one of the oldest deserts in the world and possesses unique
\ngeographical, biological and climatic features. While research through the last decade has generated a
\ncomprehensive survey of the …
View article: Rickettsia felis DNA recovered from a child who lived in southern Africa 2000 years ago
Rickettsia felis DNA recovered from a child who lived in southern Africa 2000 years ago Open
View article: Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Background Top-soil microbiomes make a vital contribution to the Earth’s ecology and harbor an extraordinarily high biodiversity. They are also key players in many ecosystem services, particularly in arid regions of the globe such as the A…
View article: With a pinch of salt: metagenomic insights into Namib Desert salt pan microbial mats and halites reveal functionally adapted and competitive communities
With a pinch of salt: metagenomic insights into Namib Desert salt pan microbial mats and halites reveal functionally adapted and competitive communities Open
Salt pans or playas, which are saline-rich springs surrounded by halite evaporates in arid environments, have played an essential role in landscape erosion during the formation of the Namib Desert and are numerous in its central region. In…
View article: Additional file 13 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Additional file 13 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Additional file 13. Table S2. Taxonomy of prokaryotic taxa in the dominant fraction of the microbial community, at the Class taxrank.
View article: Additional file 18 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Additional file 18 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Additional file 18. Table S7. Number of samples allocated for each country, and number of samples collected.
View article: Additional file 14 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Additional file 14 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Additional file 14. Table S3. Metadata of the dominant phylotypes, including taxonomy, functional predictions (based on FAPROTAX and manual curation), and ecological groups based on the main environmental predictor.
View article: Additional file 15 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Additional file 15 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Additional file 15. Table S4. Table with the semi-partial correlation analysis results, in which the correlation values (r) and associated p-values of the variable with the highest correlative value are displayed for each dominant phylotyp…
View article: Additional file 17 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Additional file 17 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Additional file 17. Table S6. Net estimates and corresponding significance values for the environmental variables associated with soil health in the SEM model.
View article: Additional file 19 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Additional file 19 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Additional file 19. Table S8. Variable codes, meaning and units for the environmental variables used in this study.
View article: Additional file 12 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Additional file 12 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Additional file 12. Table S1. Metadata for all the sites used in the study, which include the latitude and longitude GPS coordinates, physicochemical properties of the sample soils, macroclimatic variables for each site, and soil texture a…
View article: Additional file 16 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes
Additional file 16 of Biogeographical survey of soil microbiomes across sub-Saharan Africa: structure, drivers, and predicted climate-driven changes Open
Additional file 16. Table S5. Taxonomy of the taxa considered as plant-growth-promoting.
View article: Multiple energy sources and metabolic strategies sustain microbial diversity in Antarctic desert soils
Multiple energy sources and metabolic strategies sustain microbial diversity in Antarctic desert soils Open
Significance Diverse microbial life has been detected in the cold desert soils of Antarctica once thought to be barren. Here, we provide metagenomic, biogeochemical, and culture-based evidence that Antarctic soil microorganisms are phyloge…
View article: Fire and herbivory drive fungal and bacterial communities through distinct above- and belowground mechanisms
Fire and herbivory drive fungal and bacterial communities through distinct above- and belowground mechanisms Open
View article: Shotgun metagenomics reveals distinct functional diversity and metabolic capabilities between 12 000-year-old permafrost and active layers on Muot da Barba Peider (Swiss Alps)
Shotgun metagenomics reveals distinct functional diversity and metabolic capabilities between 12 000-year-old permafrost and active layers on Muot da Barba Peider (Swiss Alps) Open
The warming-induced thawing of permafrost promotes microbial activity, often resulting in enhanced greenhouse gas emissions. The ability of permafrost microorganisms to survive the in situ sub-zero temperatures, their energetic strategies …
View article: Peer Review #1 of "Diversity structure of the microbial communities in the guts of four neotropical termite species (v0.2)"
Peer Review #1 of "Diversity structure of the microbial communities in the guts of four neotropical termite species (v0.2)" Open
The termite gut microbiome is dominated by lignocellulose degrading microorganisms.This study describes the intestinal microbiota of four Argentinian higher termite species with different feeding habits: Microcerotermes strunckii (hardwood…
View article: Peer Review #1 of "Diversity structure of the microbial communities in the guts of four neotropical termite species (v0.1)"
Peer Review #1 of "Diversity structure of the microbial communities in the guts of four neotropical termite species (v0.1)" Open
The termite gut microbiome is dominated by lignocellulose degrading microorganisms.This study describes the intestinal microbiota of four Argentinian higher termite species with different feeding habits: Microcerotermes strunckii (hardwood…
View article: Peer Review #2 of "Diversity structure of the microbial communities in the guts of four neotropical termite species (v0.1)"
Peer Review #2 of "Diversity structure of the microbial communities in the guts of four neotropical termite species (v0.1)" Open
The termite gut microbiome is dominated by lignocellulose degrading microorganisms.This study describes the intestinal microbiota of four Argentinian higher termite species with different feeding habits: Microcerotermes strunckii (hardwood…
View article: Peer Review #3 of "Diversity structure of the microbial communities in the guts of four neotropical termite species (v0.1)"
Peer Review #3 of "Diversity structure of the microbial communities in the guts of four neotropical termite species (v0.1)" Open
The termite gut microbiome is dominated by lignocellulose degrading microorganisms.This study describes the intestinal microbiota of four Argentinian higher termite species with different feeding habits: Microcerotermes strunckii (hardwood…
View article: Diversity structure of the microbial communities in the guts of four neotropical termite species
Diversity structure of the microbial communities in the guts of four neotropical termite species Open
The termite gut microbiome is dominated by lignocellulose degrading microorganisms. This study describes the intestinal microbiota of four Argentinian higher termite species with different feeding habits: Microcerotermes strunckii (hardwoo…
View article: Studies in genetic variability of sapota (Acharas sapota L.) germplasm
Studies in genetic variability of sapota (Acharas sapota L.) germplasm Open
A study was carried out to find out the variability among the 19 sapota genotypes at Department of Fruit Science, Horticultural College and Research Institute, Periyakulam. Observations on various morphological, physiological and biochemic…
View article: Microbial Nitrogen Cycling in Antarctic Soils
Microbial Nitrogen Cycling in Antarctic Soils Open
The Antarctic continent is widely considered to be one of the most hostile biological habitats on Earth. Despite extreme environmental conditions, the ice-free areas of the continent, which constitute some 0.44% of the total continental la…
View article: The gut mycobiota of rural and urban individuals is shaped by geography
The gut mycobiota of rural and urban individuals is shaped by geography Open
View article: A genome compendium reveals diverse metabolic adaptations of Antarctic soil microorganisms
A genome compendium reveals diverse metabolic adaptations of Antarctic soil microorganisms Open
A surprising diversity and abundance of microorganisms resides in the cold desert soils of Antarctica. The metabolic processes that sustain them, however, are poorly understood. In this study, we used metagenomic and biogeochemical approac…
View article: Ancient DNA of<i>Rickettsia felis</i>and<i>Toxoplasma gondii</i>implicated in the death of a hunter-gatherer boy from South Africa, 2,000 years ago
Ancient DNA of<i>Rickettsia felis</i>and<i>Toxoplasma gondii</i>implicated in the death of a hunter-gatherer boy from South Africa, 2,000 years ago Open
The Stone Age record of South Africa provides some of the earliest evidence for the biological and cultural origins of Homo sapiens . While there is extensive genomic evidence for the selection of polymorphisms in response to pathogen-pres…
View article: The gut mycobiota of rural and urban individuals is shaped by geography
The gut mycobiota of rural and urban individuals is shaped by geography Open
Background Understanding the structure and drivers of gut microbiota remains a major ecological endeavour. Recent studies have shown that several factors including diet, lifestyle and geography may substantially shape the human gut microbi…
View article: Multi-proxy analyses of a mid-15th century Middle Iron Age Bantu-speaker palaeo-faecal specimen elucidates the configuration of the ‘ancestral’ sub-Saharan African intestinal microbiome
Multi-proxy analyses of a mid-15th century Middle Iron Age Bantu-speaker palaeo-faecal specimen elucidates the configuration of the ‘ancestral’ sub-Saharan African intestinal microbiome Open
Background The archaeological incidence of ancient human faecal material provides a rare opportunity to explore the taxonomic composition and metabolic capacity of the ancestral human intestinal microbiome (IM). Here, we report the results…