2021
Debray, R; Herbert, R; Jaffe, A; Crits-Christoph, A; Power, ME; Koskella, B
Priority effects in microbiome assembly Journal Article
In: Nature Reviews Microbiology, 2021.
Links | BibTeX | Tags: ERCZO, microbial communities
@article{Debray2021,
title = {Priority effects in microbiome assembly},
author = {R Debray and R Herbert and A Jaffe and A Crits-Christoph and ME Power and B Koskella},
url = {https://angelo.berkeley.edu/debray_priority_effects_microbiome/},
doi = {https://doi.org/10.1038/s41579-021-00604-w},
year = {2021},
date = {2021-08-27},
urldate = {2021-08-27},
journal = {Nature Reviews Microbiology},
keywords = {ERCZO, microbial communities},
pubstate = {published},
tppubtype = {article}
}
2009
Cruz-Martínez, Brodie EL Suttle KB
Despite strong seasonal responses, soil microbial consortia are more resilient to long-term changes in rainfall than overlying grassland. Journal Article
In: The ISME Journal, vol. 3, pp. 738–744, 2009.
Abstract | Links | BibTeX | Tags: climate change, cosmogenic isotope, grasslands, microbial communities, rainfall, soil
@article{doi:10.1038/ismej.2009.16,
title = {Despite strong seasonal responses, soil microbial consortia are more resilient to long-term changes in rainfall than overlying grassland.},
author = {Brodie EL Suttle KB Cruz-Martínez},
url = {https://angelo.berkeley.edu/wp-content/uploads/sites/59/Cruz_2009_ISME.pdf},
doi = {doi:10.1038/ismej.2009.16},
year = {2009},
date = {2009-03-12},
journal = {The ISME Journal},
volume = {3},
pages = {738–744},
abstract = {Climate change impacts on soil microbial communities could alter the structure of terrestrial ecosystems and biogeochemical cycles of the Earth. We used 16S rRNA gene microarrays to evaluate changes in the composition of grassland soil microbial communities under rainfall amendments simulating alternative climate change scenarios, and to compare these to responses of overlying plants and invertebrates. Following 5 years of rainfall manipulation, soil bacteria and archaea in plots where natural rain was supplemented differed little from ambient controls, despite profound treatment-related changes in the overlying grassland. During the sixth and seventh year, seasonal differences in bacterial and archaeal assemblages emerged among treatments, but only when watering exacerbated or alleviated periods of particularly aberrant conditions in the ambient climate. In contrast to effects on plants and invertebrates, effects on bacteria and archaea did not compound across seasons or years, indicating that soil microbial communities may be more robust than associated aboveground macroorganisms to certain alterations in climate.},
keywords = {climate change, cosmogenic isotope, grasslands, microbial communities, rainfall, soil},
pubstate = {published},
tppubtype = {article}
}
Climate change impacts on soil microbial communities could alter the structure of terrestrial ecosystems and biogeochemical cycles of the Earth. We used 16S rRNA gene microarrays to evaluate changes in the composition of grassland soil microbial communities under rainfall amendments simulating alternative climate change scenarios, and to compare these to responses of overlying plants and invertebrates. Following 5 years of rainfall manipulation, soil bacteria and archaea in plots where natural rain was supplemented differed little from ambient controls, despite profound treatment-related changes in the overlying grassland. During the sixth and seventh year, seasonal differences in bacterial and archaeal assemblages emerged among treatments, but only when watering exacerbated or alleviated periods of particularly aberrant conditions in the ambient climate. In contrast to effects on plants and invertebrates, effects on bacteria and archaea did not compound across seasons or years, indicating that soil microbial communities may be more robust than associated aboveground macroorganisms to certain alterations in climate.
2008
Ding, H; Valentine, DL
Methanotrophic bacteria occupy benthic microbial mats in shallow marine hydrocarbon seeps, Coal Oil Point, California Journal Article
In: Journal of Geophysical Research: Biogeosciences, vol. 113, iss. G1, pp. G01015, 2008, ISBN: 2156-2202.
Abstract | Links | BibTeX | Tags: microbial communities
@article{Ding2008,
title = {Methanotrophic bacteria occupy benthic microbial mats in shallow marine hydrocarbon seeps, Coal Oil Point, California},
author = {H Ding and DL Valentine},
url = {http://onlinelibrary.wiley.com/doi/10.1029/2007JG000537/abstract},
doi = {10.1029/2007JG000537},
isbn = {2156-2202},
year = {2008},
date = {2008-03-01},
journal = {Journal of Geophysical Research: Biogeosciences},
volume = {113},
issue = {G1},
pages = {G01015},
abstract = {Microbial mats composed of giant sulfur bacteria are observed throughout the benthos along continental margins. These communities serve to oxidize dissolved sulfides to sulfate, and are typically associated with the recent exposure of sulfide-rich sediments. Such mats are also ubiquitous in areas of hydrocarbon seepage, where they are thought to consume sulfide generated in underlying sediment. Despite the high abundance of dissolved methane in hydrocarbon seeps, few studies have considered the importance of methanotrophy in mat communities. To assess the importance of methanotrophs in microbial mats from hydrocarbon seeps, an approach involving lipid biomarkers, stable isotopes and enrichment culturing was applied. Microbial mat samples were collected from benthic surfaces at two hydrocarbon seeps located in the Coal Oil Point seep field, offshore from Goleta, California. Both samples display a high abundance of 16:1 fatty acids, including two isomers specific to type I methanotrophic bacteria, 16:1(ω8) and 16:1(ω6). Depleted values of δ13C found in 16:1 fatty acids suggests methane assimilation into biomass, whereas three separate investigations of sulfide-oxidizing bacteria yield fractionation factors too small to account for these values. On the basis of these observations and experiments, an isotope mass balance was applied to fatty acids present in the microbial mat samples which indicates methanotrophs contribute up to 46% of total fatty acids. These results implicate methanotrophy as an important function for microbial mats in seep areas, despite the visual appearance of these mats as being composed of giant sulfur bacteria.},
keywords = {microbial communities},
pubstate = {published},
tppubtype = {article}
}
Microbial mats composed of giant sulfur bacteria are observed throughout the benthos along continental margins. These communities serve to oxidize dissolved sulfides to sulfate, and are typically associated with the recent exposure of sulfide-rich sediments. Such mats are also ubiquitous in areas of hydrocarbon seepage, where they are thought to consume sulfide generated in underlying sediment. Despite the high abundance of dissolved methane in hydrocarbon seeps, few studies have considered the importance of methanotrophy in mat communities. To assess the importance of methanotrophs in microbial mats from hydrocarbon seeps, an approach involving lipid biomarkers, stable isotopes and enrichment culturing was applied. Microbial mat samples were collected from benthic surfaces at two hydrocarbon seeps located in the Coal Oil Point seep field, offshore from Goleta, California. Both samples display a high abundance of 16:1 fatty acids, including two isomers specific to type I methanotrophic bacteria, 16:1(ω8) and 16:1(ω6). Depleted values of δ13C found in 16:1 fatty acids suggests methane assimilation into biomass, whereas three separate investigations of sulfide-oxidizing bacteria yield fractionation factors too small to account for these values. On the basis of these observations and experiments, an isotope mass balance was applied to fatty acids present in the microbial mat samples which indicates methanotrophs contribute up to 46% of total fatty acids. These results implicate methanotrophy as an important function for microbial mats in seep areas, despite the visual appearance of these mats as being composed of giant sulfur bacteria.