Impact of redox-stratification on the diversity and distribution of bacterial communities in sandy reef sediments in a microcosm

Gao, Zheng; Wang, Xin; Hannides, Angelos K.; Sansone, Francis J.; Wang, Guangyi

doi:10.1007/s00343-011-0316-z

Cited by 8 publications

(6 citation statements)

References 67 publications

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“…Anorthoclase may instead be associated with bioavailability of nutrients as in Rogers and Bennett 64 , where weathering of P-containing mineral inclusions stimulated growth of microbial biomass; measurements of bio-available nutrient inclusions were not, however, available in the present study. Depressed OTU richness in the reduced facies is in contrast to patterns from marine sediments, where bacterial richness was highest in reduced sediments 65 66 . This suggests that redox-state itself does not govern microbial richness in the subsurface; instead, microbial richness appears to be governed more by pH and mineralogy.…”

Section: Discussioncontrasting

confidence: 64%

Coupling among Microbial Communities, Biogeochemistry and Mineralogy across Biogeochemical Facies

Stegen

Konopka

McKinley

et al. 2016

Sci Rep

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Physical properties of sediments are commonly used to define subsurface lithofacies and these same physical properties influence subsurface microbial communities. This suggests an (unexploited) opportunity to use the spatial distribution of facies to predict spatial variation in biogeochemically relevant microbial attributes. Here, we characterize three biogeochemical facies—oxidized, reduced, and transition—within one lithofacies and elucidate relationships among facies features and microbial community biomass, richness, and composition. Consistent with previous observations of biogeochemical hotspots at environmental transition zones, we find elevated biomass within a biogeochemical facies that occurred at the transition between oxidized and reduced biogeochemical facies. Microbial richness—the number of microbial taxa—was lower within the reduced facies and was well-explained by a combination of pH and mineralogy. Null modeling revealed that microbial community composition was influenced by ecological selection imposed by redox state and mineralogy, possibly due to effects on nutrient availability or transport. As an illustrative case, we predict microbial biomass concentration across a three-dimensional spatial domain by coupling the spatial distribution of subsurface biogeochemical facies with biomass-facies relationships revealed here. We expect that merging such an approach with hydro-biogeochemical models will provide important constraints on simulated dynamics, thereby reducing uncertainty in model predictions.

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Section: Discussioncontrasting

confidence: 64%

Coupling among Microbial Communities, Biogeochemistry and Mineralogy across Biogeochemical Facies

Stegen

Konopka

McKinley

et al. 2016

Sci Rep

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“…ARL-V was once again strictly associated with coral tissue and surface: in three studies that concurrently sampled corals and surrounding water (Reis et al, 2009;Sunagawa et al, 2010;Chen et al, 2011), we found no ARL-V sequences in reef water, but identified multiple in all corals sampled. Similarly, surveys of coral reef sediment that identified sequence from other plastids, including ARL-I (Vitrella), did not contain ARL-V (Sørensen et al, 2007;Garren et al, 2009;Gao et al, 2011). Lastly, in at least one coral species examined (Isopora palifera in Taiwan) we detected ARL-V's sequence on 6 out of 7 occasions during 1 year (February and April to August; not detected in November; Chen et al, 2011), suggesting a prolonged association.…”

mentioning

confidence: 61%

Environmental distribution of coral-associated relatives of apicomplexan parasites

et al. 2012

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A lineage of plastid-bearing eukaryotic microbes that is closely related to apicomplexan parasites was recently found in a specific association with coral reefs (apicomplexan-related lineage-V, or ARL-V). Here, we address the possible nature of this association using plastid 'contamination' in fine-scale bacterial sequence surveys. In a transect between corals and associated macroalgae, ARL-V is specifically associated with the coral, in contrast to all microalgal types (including diatoms, haptophytes, pelagophytes and photosynthetic apicomplexan relatives, Chromera and Vitrella), which are associated with macroalgae. ARL-V is associated with at least 20 species of symbiotic corals through extended time periods and large geographic distances. It is significantly enriched in healthy coral tissue and shallow reef depths. Altogether, the evidence points to a specific relationship between ARL-V and corals, and is suggestive of symbiosis, perhaps based on photosynthesis.

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“…This cluster includes organisms isolated from the sponges H. heliophila and Halichondria sp. in Alabama and an organism isolated from sandy reef sediment in Hawaii (Erwin et al, 2011;Gao et al, 2011). The sheer dominance of the three Kiloniellales OTUs in S. diversicolor thus indicates that they are well adapted to any antimicrobial substances produced by the host sponge and/or produce strong antimicrobial substances themselves.…”

Section: Discussionmentioning

confidence: 99%

Habitat- and host-related variation in sponge bacterial symbiont communities in Indonesian waters

Cleary

Becking

Voogd

et al. 2013

FEMS Microbiol Ecol

100

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Marine lakes are unique ecosystems that contain isolated populations of marine organisms. Isolated from the surrounding marine habitat, many lakes house numerous endemic species. In this study, microbial communities of sponges inhabiting these lakes were investigated for the first time using barcoded pyrosequencing of 16S rRNA gene amplicons. Our main goals were to compare the bacterial richness and composition of two sponge species (Suberites diversicolor and Cinachyrella australiensis) inhabiting both marine lakes and adjacent open coastal systems. Host species and habitat explained almost 59% of the variation in bacterial composition. There was a significant difference in composition between both host species. Within S. diversicolor, there was little discernible difference between bacterial communities inside and outside lakes. The bacterial community of this species was, furthermore, dominated (63% of all sequences) by three very closely related alphaproteobacterial taxa identified as belonging to the recently described order Kiloniellales. Cinachyrella australiensis, in contrast, hosted markedly different bacterial communities inside and outside lakes with very few shared abundant taxa. Cinachyrella australiensis in open habitat only shared 9.4% of OTUs with C. australiensis in lake habitat. Bacteria were thus both highly species specific and, in the case of C. australiensis, habitat specific.

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Impact of redox-stratification on the diversity and distribution of bacterial communities in sandy reef sediments in a microcosm

Cited by 8 publications

References 67 publications

Coupling among Microbial Communities, Biogeochemistry and Mineralogy across Biogeochemical Facies

Coupling among Microbial Communities, Biogeochemistry and Mineralogy across Biogeochemical Facies

Environmental distribution of coral-associated relatives of apicomplexan parasites

Habitat- and host-related variation in sponge bacterial symbiont communities in Indonesian waters

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