How do microbes survive at deep-sea hydrothermal vents?

Deep-sea hydrothermal vent microbial communities consist of unicellular organisms that live in microbial mats, float freely, or form endosymbiotic relationships with vent animals. Lacking sunlight, these ecosystems rely on chemosynthesis, where chemolithoautotrophic bacteria and archaea use geological energy and chemicals like hydrogen sulfide to fix carbon into organic nutrients. Viruses are also present, and their influence on microbial ecology is an emerging area of scientific research.

What we know

• The hydrothermal vent microbial community includes unicellular organisms found in microbial mats, free-floating cells, or existing in endosymbiotic relationships with animals. [2]
• Chemolithoautotrophic bacteria derive nutrients and energy from geological activity at hydrothermal vents to fix carbon into organic forms. [2]
• Hydrogen sulfide chemosynthesis is common in hydrothermal vent microbial communities, serving as a predominant energy source in the absence of light. [4]
• Viruses are part of the hydrothermal vent microbial community, and their impact on microbial ecology represents a burgeoning research field. [2]

Where to go next

• how it workedWhat is hydrogen sulfide chemosynthesis?
• the bigger pictureWhat are hydrothermal vents?
• a case in pointWhat is Loki's Castle?
• what followedHow do giant tube worms rely on vent bacteria?
• an unexpected connectionCould hydrothermal vents exist on Saturn's moon Enceladus?

Sources

• [1]Hydrothermal vent microbial communities (Wikidata Q60749260) · CC0 1.0
• [2]Hydrothermal vent microbial communities · CC BY-SA 4.0
• [3]Hydrothermal vent · CC BY-SA 4.0
• [4]Hydrogen sulfide chemosynthesis · CC BY-SA 4.0
• [5]Loki's Castle · CC BY-SA 4.0