Drivers of bacterial diversity dynamics in permeable carbonate and silicate coral reef sands from the Red Sea

Schöttner, Sandra; Pfitzner, Barbara; Grünke, Stefanie; Rasheed, Mohammed; Wild, Christian; Ramette, Alban

doi:10.1111/j.1462-2920.2011.02494.x

Cited by 51 publications

(46 citation statements)

References 66 publications

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“…This confirmed the importance of marine sediments as reservoirs of microbial diversity [52]–[53]. The absence of major differences in OTU numbers between HMA and LMA sponges, however, appeared inconsistent with previous assumptions of a higher community complexity in HMA compared to LMA sponges (e.g.…”

Section: Discussionsupporting

confidence: 60%

Relationships between Host Phylogeny, Host Type and Bacterial Community Diversity in Cold-Water Coral Reef Sponges

et al. 2013

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Cold-water coral reefs are known to locally enhance the diversity of deep-sea fauna as well as of microbes. Sponges are among the most diverse faunal groups in these ecosystems, and many of them host large abundances of microbes in their tissues. In this study, twelve sponge species from three cold-water coral reefs off Norway were investigated for the relationship between sponge phylogenetic classification (species and family level), as well as sponge type (high versus low microbial abundance), and the diversity of sponge-associated bacterial communities, taking also geographic location and water depth into account. Community analysis by Automated Ribosomal Intergenic Spacer Analysis (ARISA) showed that as many as 345 (79%) of the 437 different bacterial operational taxonomic units (OTUs) detected in the dataset were shared between sponges and sediments, while only 70 (16%) appeared purely sponge-associated. Furthermore, changes in bacterial community structure were significantly related to sponge species (63% of explained community variation), sponge family (52%) or sponge type (30%), whereas mesoscale geographic distances and water depth showed comparatively small effects (<5% each). In addition, a highly significant, positive relationship between bacterial community dissimilarity and sponge phylogenetic distance was observed within the ancient family of the Geodiidae. Overall, the high diversity of sponges in cold-water coral reefs, combined with the observed sponge-related variation in bacterial community structure, support the idea that sponges represent heterogeneous, yet structured microbial habitats that contribute significantly to enhancing bacterial diversity in deep-sea ecosystems.

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Section: Discussionsupporting

confidence: 60%

Relationships between Host Phylogeny, Host Type and Bacterial Community Diversity in Cold-Water Coral Reef Sponges

et al. 2013

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“…; Schöttner et al . ; Aravindraja et al . ) and ourselves (J. Wippler and N. Dubilier, unpublished results).…”

Section: Discussionmentioning

confidence: 99%

Closely coupled evolutionary history of ecto‐ and endosymbionts from two distantly related animal phyla

et al. 2016

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The level of integration between associated partners can range from ectosymbioses to extracellular and intracellular endosymbioses, and this range has been assumed to reflect a continuum from less intimate to evolutionarily highly stable associations. In this study, we examined the specificity and evolutionary history of marine symbioses in a group of closely related sulphur-oxidizing bacteria, called Candidatus Thiosymbion, that have established ecto-and endosymbioses with two distantly related animal phyla, Nematoda and Annelida. Intriguingly, in the ectosymbiotic associations of stilbonematine nematodes, we observed a high degree of congruence between symbiont and host phylogenies, based on their ribosomal RNA (rRNA) genes. In contrast, for the endosymbioses of gutless phallodriline annelids (oligochaetes), we found only a weak congruence between symbiont and host phylogenies, based on analyses of symbiont 16S rRNA genes and six host genetic markers. The much higher degree of congruence between nematodes and their ectosymbionts compared to those of annelids and their endosymbionts was confirmed by cophylogenetic analyses. These revealed 15 significant codivergence events between stilbonematine nematodes and their ectosymbionts, but only one event between gutless phallodrilines and their endosymbionts. Phylogenetic analyses of 16S rRNA gene sequences from 50 Cand. Thiosymbion species revealed seven well-supported clades that contained both stilbonematine ectosymbionts and phallodriline endosymbionts. This closely coupled evolutionary history of marine ecto-and endosymbionts suggests that switches between symbiotic lifestyles and between the two host phyla occurred multiple times during the evolution of the Cand. Thiosymbion clade, and highlights the remarkable flexibility of these symbiotic bacteria.

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“…For oligotrophic coral reefs, this cycling activity, and particularly the nitrogen cycle, is of crucial importance to degrade organic matter and maintain high levels of primary production (Schöttner et al . ). The importance of nitrogen for organisms and ecosystems is critical; nitrogen is an essential component of proteins, nucleic acids and cell wall constituents and limits marine ecosystem primary productivity (Francis et al .…”

Section: Introductionmentioning

confidence: 97%

The putative functional ecology and distribution of archaeal communities in sponges, sediment and seawater in a coral reef environment

et al. 2015

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Archaea play crucial roles in a number of key ecological processes including nitrification and methanogenesis. Although several studies have been conducted on these organisms, the roles and dynamics of coral reef archaeal communities are still poorly understood, particularly in host and nonhost biotopes and in high (HMA) and low microbial abundance (LMA) sponges. Here, archaeal communities detected in six distinct biotopes, namely, sediment, seawater and four different sponge species Stylissa carteri, Stylissa massa, Xestospongia testudinaria and Hyrtios erectus from the Spermonde Archipelago, SW Sulawesi, Indonesia were investigated using 454-pyrosequencing of 16S rRNA genes (OTU cut-off 97%). Archaeal communities from sediment and sponges were dominated by Crenarchaeota, while the seawater community was dominated by Euryarchaeota. The biotope explained almost 75% of the variation in archaeal composition, with clear separation between microbial assemblages from sediment, X. testudinaria and H. erectus (HMA). In contrast, samples from seawater and both Stylissa species (LMA) showed considerable overlap in the ordination and, furthermore, shared most abundant OTUs with the exception of a single dominant OTU specifically enriched in both Stylissa species. Predicted functional gene content in archaeal assemblages also revealed significant differences among biotopes. Different ammonia assimilation strategies were exhibited by the archaeal communities: X. testudinaria, H. erectus and sediment archaeal communities were enriched for glutamate dehydrogenase with mixed specificity (NAD(P)(+) ) pathways, while archaeal planktonic communities were enriched for specific glutamate dehydrogenase (NADP(+) ) and glutamate synthase pathways. Archaeal communities in Stylissa had intermediate levels of enrichment. Our results indicate that archaeal communities in different biotopes have distinct ecophysiological roles.

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Drivers of bacterial diversity dynamics in permeable carbonate and silicate coral reef sands from the Red Sea

Cited by 51 publications

References 66 publications

Relationships between Host Phylogeny, Host Type and Bacterial Community Diversity in Cold-Water Coral Reef Sponges

Relationships between Host Phylogeny, Host Type and Bacterial Community Diversity in Cold-Water Coral Reef Sponges

Closely coupled evolutionary history of ecto‐ and endosymbionts from two distantly related animal phyla

The putative functional ecology and distribution of archaeal communities in sponges, sediment and seawater in a coral reef environment

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