Response of Microbial Community Composition and Function to Soil Climate Change

2006 ◽  
Vol 52 (4) ◽  
pp. 716-724 ◽  
Author(s):  
M. P. Waldrop ◽  
M. K. Firestone
Keyword(s):  
Climate Change ◽  
Microbial Community ◽  
Community Composition ◽  
Microbial Community Composition ◽  
And Function ◽  
Soil Climate

scholarly journals Spatial and Annual Variation in Microbial Abundance, Community Composition, and Diversity Associated With Alpine Surface Snow

2021 ◽  
Vol 12 ◽  
Author(s):  
Lucas Fillinger ◽  
Kerstin Hürkamp ◽  
Christine Stumpp ◽  
Nina Weber ◽  
Dominik Forster ◽  
...  
Keyword(s):  
Climate Change ◽  
Microbial Community ◽  
Community Composition ◽  
Microbial Community Composition ◽  
Alpha Diversity ◽  
Community Diversity ◽  
Taxon Richness ◽  
European Alps ◽  
Prokaryotic Cell ◽  
Surface Snow

Understanding microbial community dynamics in the alpine cryosphere is an important step toward assessing climate change impacts on these fragile ecosystems and meltwater-fed environments downstream. In this study, we analyzed microbial community composition, variation in community alpha and beta diversity, and the number of prokaryotic cells and virus-like particles (VLP) in seasonal snowpack from two consecutive years at three high altitude mountain summits along a longitudinal transect across the European Alps. Numbers of prokaryotic cells and VLP both ranged around 104 and 105 per mL of snow meltwater on average, with variation generally within one order of magnitude between sites and years. VLP-to-prokaryotic cell ratios spanned two orders of magnitude, with median values close to 1, and little variation between sites and years in the majority of cases. Estimates of microbial community alpha diversity inferred from Hill numbers revealed low contributions of common and abundant microbial taxa to the total taxon richness, and thus low community evenness. Similar to prokaryotic cell and VLP numbers, differences in alpha diversity between years and sites were generally relatively modest. In contrast, community composition displayed strong variation between sites and especially between years. Analyses of taxonomic and phylogenetic community composition showed that differences between sites within years were mainly characterized by changes in abundances of microbial taxa from similar phylogenetic clades, whereas shifts between years were due to significant phylogenetic turnover. Our findings on the spatiotemporal dynamics and magnitude of variation of microbial abundances, community diversity, and composition in surface snow may help define baseline levels to assess future impacts of climate change on the alpine cryosphere.

scholarly journals Impact of global climate change on marine bacterial symbioses and disease

2009 ◽  
Vol 30 (2) ◽  
pp. 78
Author(s):  
Nicole S Webster ◽  
David G Bourne ◽  
Linda L Blackall
Keyword(s):  
Climate Change ◽  
Microbial Community ◽  
Environmental Change ◽  
Host Range ◽  
Global Climate Change ◽  
Community Dynamics ◽  
Global Climate ◽  
Microbial Community Composition ◽  
Range Function ◽  
And Function

Microbes constitute the largest diversity and biomass of all marine organisms, yet they are often ignored during discussions about the impacts of environmental change. This is despite the fact that, of all the organisms on the planet, it is the microbes that will play the largest fundamental role in either mitigating or exacerbating the effects of global climate change. Microbes will also be the first and fastest to shift their metabolic capabilities, host range, function and community dynamics as a result of climate change. Therefore, an understanding of microbial community composition and function in individual niche habitats is vital.

scholarly journals Microbial Community Composition and Denitrifying Enzyme Activities in Salt Marsh Sediments

2008 ◽  
Vol 74 (24) ◽  
pp. 7585-7595 ◽  
Author(s):  
Yiping Cao ◽  
Peter G. Green ◽  
Patricia A. Holden
Keyword(s):  
Microbial Community ◽  
Salt Marsh ◽  
Carbon Content ◽  
Community Composition ◽  
Enzyme Activities ◽  
Nutrient Loading ◽  
Microbial Community Composition ◽  
Marsh Sediments ◽  
Salt Marsh Sediments ◽  
And Function

ABSTRACT Denitrifying microbial communities and denitrification in salt marsh sediments may be affected by many factors, including environmental conditions, nutrient availability, and levels of pollutants. The objective of this study was to examine how microbial community composition and denitrification enzyme activities (DEA) at a California salt marsh with high nutrient loading vary with such factors. Sediments were sampled from three elevations, each with different inundation and vegetation patterns, across 12 stations representing various salinity and nutrient conditions. Analyses included determination of cell abundance, total and denitrifier community compositions (by terminal restriction fragment length polymorphism), DEA, nutrients, and eluted metals. Total bacterial (16S rRNA) and denitrifier (nirS) community compositions and DEA were analyzed for their relationships to environmental variables and metal concentrations via multivariate direct gradient and regression analyses, respectively. Community composition and DEA were highly variable within the dynamic salt marsh system, but each was strongly affected by elevation (i.e., degree of inundation) and carbon content as well as by selected metals. Carbon content was highly related to elevation, and the relationships between DEA and carbon content were found to be elevation specific when evaluated across the entire marsh. There were also lateral gradients in the marsh, as evidenced by an even stronger association between community composition and elevation for a marsh subsystem. Lastly, though correlated with similar environmental factors and selected metals, denitrifier community composition and function appeared uncoupled in the marsh.

scholarly journals Tracking Replicate Divergence in Microbial Community Composition and Function in Experimental Microcosms

2019 ◽  
Vol 78 (4) ◽  
pp. 1035-1039 ◽  
Author(s):  
Renee Johansen ◽  
Michaeline Albright ◽  
La Verne Gallegos-Graves ◽  
Deanna Lopez ◽  
Andreas Runde ◽  
...  
Keyword(s):  
Microbial Community ◽  
Community Composition ◽  
Microbial Community Composition ◽  
And Function
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