Crustose Coralline Algae and a Cnidarian Neuropeptide Trigger Larval Settlement in Two Coral Reef Sponges
Open accessAbstract
In sessile marine invertebrates, larval settlement is fundamental to population maintenance and persistence. Cues contributing to the settlement choices and metamorphosis of larvae have important implications for the success of individuals and populations, but cues mediating larval settlement for many marine invertebrates are largely unknown. This study assessed larval settlement in two common Great Barrier Reef sponges, Coscinoderma matthewsi and Rhopaloeides odorabile, to cues that enhance settlement and metamorphosis in various species of scleractinian coral larvae. Methanol extracts of the crustose coralline algae (CCA), Porolithon onkodes, corresponding to a range of concentrations, were used to determine the settlement responses of sponge larvae. Cnidarian neuropeptides (GLW-amide neuropeptides) were also tested as a settlement cue. Settlement in both sponge species was approximately two-fold higher in response to live chips of CCA and optimum concentrations of CCA extract compared to 0.2 µm filtered sea water controls. Metamorphosis also increased when larvae were exposed to GLW-amide neuropeptides; R. odorabile mean metamorphosis reached 42.0±5.8% compared to 16.0±2.4% in seawater controls and in C. matthewsi mean metamorphosis reached 68.3±5.4% compared to 36.7±3.3% in seawater controls. These results demonstrate the contributing role chemosensory communication plays in the ability of sponge larvae to identify suitable habitat for successful recruitment. It also raises the possibility that larvae from distinct phyla may share signal transduction pathways involved in metamorphosis.
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This environmental-cue-triggered metamorphosis pattern is seen across corals, annelids, molluscs, ascidians and others.
“This pattern is seen across corals, annelids, molluscs, ascidians and others [73-77].”
From An option space for early neural evolution (2015) · cites this paper as [77]
Neuroendocrine signalling during larval settlement and metamorphosis employs the same or homologous molecules, including nitric oxide and Wamide neuropeptides, suggesting deep evolutionary conservation.
“The neuroendocrine signalling during larval settlement and metamorphosis employs the same or homologous signalling molecules, including nitric oxide (NO) and Wamide neuropeptides [77,79,80], suggesting deep evolutionary conservation [81].”
From An option space for early neural evolution (2015) · cites this paper as [77]
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- Authors
- Whalan, S., Webster, N. S., & Negri, A. P.
- Affiliations
- James Cook University (AU)
- Australian Institute of Marine Science (AU)
- Corresponding author
- Whalan, Steve
- Venue
- PLoS ONE
- Publisher
- Public Library of Science (PLoS)
- Published
- 2012-01-25
- Volume
- 7
- Issue
- 1
- Pages
- e30386
- ISSN
- 1932-6203 (ISSN-L)
- PMC
- PMC3266265
- OpenAlex
- W2102921687
- Cited by
- 78
- References
- 41
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 11 · 2023: 4 · 2022: 3 · 2021: 5 · 2020: 7 · 2019: 6 · 2017: 4 · 2016: 2 · 2015: 9 · 2014: 13 · 2013: 7
- FWCI
- 8.24
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- PLoS ONE (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- ResearchOnline at James Cook University (James Cook University) (submittedVersion)
- Cross Connect (Southern Cross University) (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Great Barrier Reef Marine Park Authority
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Marine Sponges and Natural Products
- Physical Sciences › Environmental Science › Ecology › Coral and Marine Ecosystems Studies
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
- Keywords
- larval settlement, coral reef sponges, crustose coralline algae, metamorphosis, chemosensory cues, settlement cues, sponge larvae, signaling pathways, Great Barrier Reef
- MeSH terms
- Rhodophyta, Amides, Animals, Cnidaria, Larva, Metamorphosis, Biological, Neuropeptides, Plant Extracts, Porifera, Time Factors, Ecosystem, Coral Reefs
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