Gut Microbial Divergence Between Three Hadal Amphipod Species from the Isolated Hadal Trenches

Chan, Jiulin; Geng, Daoqiang; Pan, Binbin; Zhang, Qiming; Xu, Qianghua

doi:10.1007/s00248-021-01851-3

Cited by 7 publications

(4 citation statements)

References 59 publications

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“…Ca . Hepatoplasma, with high abundance in SJP and SSYS, was commonly found in some amphipods ( 63 ), terrestrial isopods ( 64 ), and echinoderms ( 65 ). It has been identified as a mycoplasma-like symbiont with a number of genes responsible for nutrient absorption ( 66 ), suggesting that it may be essential for the survival of hosts under low nutrient conditions ( 67 ).…”

Section: Discussionmentioning

confidence: 99%

Distinct gut microbial communities and functional predictions in divergent ophiuroid species: host differentiation, ecological niches, and adaptation to cold-water habitats

Dong,

Li,

et al. 2023

Microbiol Spectr

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Gastrointestinal microorganisms play a crucial role in host survival and adaptation, but information on host-specific selection or environmental factors that shape the microbiome in natural populations is limited. In this study, we employed 16S rRNA gene amplicon sequencing to investigate the composition and predicted the functions of gut microbiota of two ophiuroid species ( Ophiura sarsii and its subspecies O. sarsii vadicola ) from cold-water habitats across three geographically distant sea areas in the Northern Pacific Ocean. We also explored the potential influence of the host and environment on the microbiota. The two ophiuroids possessed diverse microbial communities, with Proteobacteria being the most dominant phylum in all four groups. Aliivibrio was the predominant genus in O. sarsii from the Bering Sea, while Candidatus Hepatoplasma was the dominant genus in O. sarsii from the Japan Sea and O. sarsii vadicola from the Yellow Sea. Predicted bacterial functions indicated that most of the pathways with significant differences belonged to metabolism and genetic information processing. Notably, no significant difference was observed between the two coexisting ophiuroid species in the Japan Sea. The high similarity in microbial communities between O. sarsii from the Japan Sea and O. sarsii vadicola from the Yellow Sea may be attributed to their analogous ecological niche. The host and the environment jointly shape the composition of the gut microbial community. The presence of specific microorganisms supports the ecological success of ophiuroids across diverse environments, providing a foundation for host adaptation to cold-water habitats. IMPORTANCE Gastrointestinal microorganisms are critical to the survival and adaptation of hosts, and there are few studies on the differences and functions of gastrointestinal microbes in widely distributed species. This study investigated the gut microbes of two ophiuroid species ( Ophiura sarsii and its subspecies O. sarsii vadicola ) in cold-water habitats of the Northern Pacific Ocean. The results showed that a combination of host and environmental factors shapes the intestinal microbiota of ophiuroids. There was a high similarity in microbial communities between the two groups living in different regions, which may be related to their similar ecological niches. These microorganisms played a vital role in the ecological success of ophiuroids as the foundation for their adaptation to cold-water environments. This study revealed the complex relationship between hosts and their gut microbes, providing insights into the role they play in the adaptation and survival of marine species.

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Section: Discussionmentioning

confidence: 99%

Distinct gut microbial communities and functional predictions in divergent ophiuroid species: host differentiation, ecological niches, and adaptation to cold-water habitats

Dong,

Li,

et al. 2023

Microbiol Spectr

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“…During an expedition of the New Britain Trench (8,824 m, 7.02◦S, 149.16◦E) in the West Pacific Ocean conducted in 2016, our group collected 10 A. gigantea individuals with attached eggs with a full ocean depth lander vehicle launched from the “Zhang Jian” research vessel that were immediately stored at −80 °C immediately. Detailed information about the lander vehicle and sampling process is described by Chan et al (2020 ; 2022 ; 2021) and Li et al (2021) . The specimens were stored in bubble chamber full of dry ice and delivered to Shanghai Ocean University.…”

Section: Methodsmentioning

confidence: 99%

“…In 2018, a tiny brood of hatching Alicella gigantea (Crustacea, Amphipoda, Lysianassoidea) was collected from the New Britain Trench (7.02S, 149.16E) at a depth of 8,824 m with the use of an autonomous deep-ocean lander. Detailed information about this lander vehicle and the sample collection process is described by Chan et al (2020 ; 2022 ; 2021) . To the best of our knowledge, this was the first collection of A. gigantea eggs from a hadal zone.…”

Section: Introductionmentioning

confidence: 99%

Morphological and molecular evolution of hadal amphipod’s eggs provides insights into embryogenesis under high hydrostatic pressure

Wang²,

Jiang³

et al. 2022

Front. Cell Dev. Biol.

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Hadal zones are unique habitats characterized by high hydrostatic pressure (HHP) and scarce food supplies. The ability of eggs of species dwelling in hadal zones to develop into normal embryo under high hydrostatic pressure is an important evolutionary and developmental trait. However, the mechanisms underlying the development of eggs of hadal-dwelling species remain unknown due to the difficulty of sampling ovigerous females. Here, morphological and transcriptome analyses of eggs of the “supergiant” amphipod Alicella gigantea collected from the New Britain Trench were conducted. The morphology of A. gigantea eggs, including size, was assessed and the ultrastructure of the eggshell was investigated by scanning electron microscopy. Transcriptome sequencing and molecular adaptive evolution analysis of A. gigantea eggs showed that, as compared with shallow-water Gammarus species, genes exhibiting accelerated evolution and the positively selected genes were mostly related to pathways associated with “mitosis” and “chitin-based embryonic cuticle biosynthetic process”, suggesting that “normal mitosis maintenance” and “cuticle development and protection” are the two main adaptation strategies for survival of eggs in hadal environments. In addition, the concentration of trimethylamine oxide (TMAO), an important osmotic regulator, was significantly higher in the eggs of hadal amphipods as compared to those of shallow-water species, which might promote the eggs’ adaptation abilities. Morphological identification, evolutionary analysis, and the trimethylamine oxide concentration of A. gigantea eggs will facilitate a comprehensive overview of the piezophilic adaptation of embryos in hadal environments and provide a strategy to analyze embryogenesis under high hydrostatic pressure.

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“…Candidatus Hepatoplasma and Psychromonas were found to be dominant symbiotic microbes within the guts of amphipods collected from the Mariana Trench and Japan Trench [14]. A comparison of the amphipod gut microbiota from three hadal trenches, including the Mariana Trench, Marceau Trench, and New Britain Trench, showed the different gut microbial communities with potential different functions [15]. An experimental investigation of amphipod gut microbes has demonstrated that the amphipod host capacities of cellulose degradation were probably enhanced by their intestinal bacteria [16].…”

Section: Introductionmentioning

confidence: 99%

Comparably Characterizing the Gut Microbial Communities of Amphipods from Littoral to Hadal Zones

Wei,

Liao,

Wang

et al. 2023

JMSE

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Amphipods are an important group of invertebrates in marine ecosystems due to their high abundance and diversity. As an essential part of the marine food web, amphipods play a vital role in nutrient recycling and provide large amounts of detritus-derived fine-particulate organic matter for other invertebrates. Although the importance of gut microbiota and the necessity to consider them has been increasingly recognized, the gut microbial community and diversity of amphipods have not been well studied. Here, we comparatively studied the gut microbiota of diverse amphipod species inhabiting from coastal to hadopelagic zones. The results showed that four phyla, including Proteobacteria, Firmicutes, Bacteroidota, and Actinobacteriota, occupied more than 90% of the total microbes in the studied amphipod guts, with Firmicutes being dominant in the hadal amphipods. The gut microbiome of amphipods from the hadal zone displayed the lowest richness, lowest diversity, and shared few microorganisms with the surrounding seawater compared to others. Amphipods in different inhabiting regions have discriminant taxa for their gut microbial communities. Taken together, amphipod gut microbiota was affected by both biological and abiotic factors, yet these factors are not independent. This article provides us with a further understanding of the structure and characteristics of the gut microbiota of invertebrate organisms.

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Gut Microbial Divergence Between Three Hadal Amphipod Species from the Isolated Hadal Trenches

Cited by 7 publications

References 59 publications

Distinct gut microbial communities and functional predictions in divergent ophiuroid species: host differentiation, ecological niches, and adaptation to cold-water habitats

Distinct gut microbial communities and functional predictions in divergent ophiuroid species: host differentiation, ecological niches, and adaptation to cold-water habitats

Morphological and molecular evolution of hadal amphipod’s eggs provides insights into embryogenesis under high hydrostatic pressure

Comparably Characterizing the Gut Microbial Communities of Amphipods from Littoral to Hadal Zones

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