Study
Prokaryotic cells in the hydrothermal vent tube worm Riftia pachyptila: possible chemoautotrophic symbionts
Cavanaugh, Colleen M.; Gardiner, Stephen L.; Jones, Meredith L.; Jannasch, Holger W.; Waterbury, John B.
Science, 1981
Examined the tissue of giant vent tube worms, which have no mouth or gut, and identified the dense bacterial populations within a specialised organ, together with the enzymes of sulphur-based chemosynthesis.
- Studied in
- Riftia pachyptila
- Sample size
- specimens recovered from vent sites
The worm houses chemoautotrophic bacteria that oxidise hydrogen sulphide to fix carbon, and is nourished by them. The animal has no digestive system at all.
What it means
The authors' reading, and ours. Where they differ, that difference is the point.
How the authors put it
The vent community is supported by chemosynthesis rather than by material sinking from the surface, with animals depending on internal bacterial symbionts.
How NatureHQ reads it
The record that made vents more than a curiosity: an entire ecosystem whose energy does not come from sunlight. It is also a striking case of an animal solving an extreme by acquiring a partner rather than by evolving a capacity.
- The symbiosis was demonstrated by presence and enzyme activity; the full metabolic exchange was characterised later.
- One species, though the pattern proved general at vents.
What this study is used for on NatureHQ
One study can inform several subjects. Here is everywhere this one is cited.
Extremophiles
An extremophile is not a tough organism enduring a hostile place. It needs those conditions: an acid-loving microbe put in neutral water dies. And nearly every record in this subject belongs to a microbe, not an animal.
Extremophiles
Almost every record for what life can withstand belongs to a microbe. The reason is architectural: an animal is many specialised tissues that all have to keep working, and it dies when the first one fails.
Published by: American Association for the Advancement of SciencePublished in Science or Science Advances (AAAS).
doi.org/10.1126/science.213.4505.340
Checked against Crossref on 2026-09-28, and they agree on the title, the authors and the year.
NatureHQ summarises research in its own words and does not reproduce published text. Reviewed 2026-09-03.