Cited by 89Coral and Marine Ecosystems StudiesMarine Invertebrate Physiology and EcologyMarine Biology and Ecology Research

Benefit of pulsation in soft corals

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Kremien, Maya, Shavit, Uri, Mass, Tali, Genin, Amatzia·2013·Proceedings of the National Academy of Sciences

Abstract

Soft corals of the family Xeniidae exhibit a unique, rhythmic pulsation of their tentacles (Movie S1), first noted by Lamarck nearly 200 y ago. However, the adaptive benefit of this perpetual, energetically costly motion is poorly understood. Using in situ underwater particle image velocimetry, we found that the pulsation motions thrust water upward and enhance mixing across the coral-water boundary layer. The induced upward motion effectively prevents refiltration of water by neighboring polyps, while the intensification of mixing, together with the upward flow, greatly enhances the coral's photosynthesis. A series of controlled laboratory experiments with the common xeniid coral Heteroxenia fuscescens showed that the net photosynthesis rate during pulsation was up to an order of magnitude higher than during the coral's resting, nonpulsating state. This enhancement diminished when the concentration of oxygen in the ambient water was artificially raised, indicating that the enhancement of photosynthesis was due to a greater efflux of oxygen from the coral tissues. By lowering the internal oxygen concentration, pulsation alleviates the problem of reduced affinity of ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO) to CO2 under conditions of high oxygen concentrations. The photosynthesis-respiration ratio of the pulsating H. fuscescens was markedly higher than the ratios reported for nonpulsating soft and stony corals. Although pulsation is commonly used for locomotion and filtration in marine mobile animals, its occurrence in sessile (bottom-attached) species is limited to members of the ancient phylum Cnidaria, where it is used to accelerate water and enhance physiological processes.

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  • A sleep-like state may not be specific to Cassiopea; other cnidarians may also exhibit it.

    “Although future studies are required to test whether other cnidarians sleep, field studies showing behavioral quiescence, diel vertical migration, and swimming speeds that vary with diel period [21,22,23,37] suggest that a sleep-like state may not be specific to Cassiopea.”

    From The Jellyfish Cassiopea Exhibits a Sleep-like State (2017) · cites this paper as [21]

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Research works printed but not linked: 2

  1. Lamarck JBPA (1816) Histoire Naturelle des Animeaux sans Vertèbres [Natural History of Invertebrate Animals] (Verdière, Paris), Vol 2, pp 409-410. French.
  2. Mass T (2010) Biological and ecological effects of flow on corals. PhD thesis (Hebrew Univ of Jerusalem, Jerusalem), p 86.

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Authors
Kremien, M., Shavit, U., Mass, T., & Genin, A.
Affiliations
  • Hebrew University of Jerusalem (IL)
  • Technion – Israel Institute of Technology (IL)
  • Rutgers, The State University of New Jersey (US)
Corresponding author
Kremien, Maya
Venue
Proceedings of the National Academy of Sciences
Published
2013-04-22
Volume
110
Issue
22
Pages
8978-8983
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2159441955
Cited by
89
References
40
Citations by year
2026: 5 · 2025: 6 · 2024: 3 · 2023: 7 · 2022: 12 · 2021: 8 · 2020: 12 · 2019: 3 · 2018: 3 · 2017: 11 · 2016: 7 · 2015: 4 · 2014: 7 · 2013: 1
FWCI
5.58
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Israel Science Foundation (1487/10, 620/07 and 1487/10, 620/07)
Topics
  • Physical Sciences › Environmental Science › Ecology › Coral and Marine Ecosystems Studies
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Biology and Ecology Research
Keywords
soft coral, Xeniidae, coral photosynthesis, upward flow, Rubisco oxygenation, Cnidaria
MeSH terms
Animals, Carbon Dioxide, Extremities, Movement, Oxygen, Photosynthesis, Rheology, Ribulose-Bisphosphate Carboxylase, Water Movements, Statistics, Nonparametric, Indian Ocean, Anthozoa

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