| Distribution patterns of zoochlorellae and zooxanthellae hosted by two Pacific Northeast anemones, Anthopleura elegantissima and A. xanthogrammica. | |
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MedLine Citation:
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PMID: 20570847 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study investigated patterns in the relative abundance of two photosynthetic algal symbionts, zoochlorellae (ZC) and zooxanthellae (ZX), hosted by two temperate anemones, Anthopleura elegantissima and A. xanthogrammica. Previous studies have documented varying proportions of each symbiont along environmental gradients, presumably determined by their respective physiological capabilities. To test for differences in the algal type between the two host species, we sampled anemone tissues (tentacle or tentacle and body column) of similarly sized polyps that were located close together in multiple habitats: tidepools, crevices, underneath rock ledges, and along natural light gradients in caves. The ZC-A. elegantissima symbiosis was rare on the west coast of Vancouver Island, British Columbia, Canada. Even in low-irradiance habitats, ZC were the dominant algae hosted by A. xanthogrammica, while nearby A. elegantissima hosted ZX or was algae-free. As a first step in determining whether symbiont growth rates differed between the two host species, we quantified mitotic index (MI), the percentage of cells with division furrows, under artificial light and in the field by simultaneously sampling tentacles from both species. MI was more stable in A. elegantissima: the MI of ZX isolated from the tentacles of A. xanthogrammica was slightly higher at a light level of 80 micromol quanta m(-2) s(-1) than it was for ZX from A. elegantissima (respectively, 7.3 vs. 6.2) and relatively lower at 40 micromol quanta m(-2) s(-1) (3.9 vs. 5.6). Our data indicate host-specific differences in symbiont distributions and MI when extrinsic physical parameters were similar. |
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Authors:
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Amanda E Bates; Lily McLean; Patrick Laing; Lisa A Raeburn; Crystal Hare |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Biological bulletin Volume: 218 ISSN: 1939-8697 ISO Abbreviation: Biol. Bull. Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-06-23 Completed Date: 2010-09-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2984727R Medline TA: Biol Bull Country: United States |
Other Details:
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Languages: eng Pagination: 237-47 Citation Subset: IM |
Affiliation:
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Bamfield Marine Sciences Centre, 100 Pachena Road, Bamfield, British Columbia VOR1BO, Canada. bates.amanda@gmail.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algae
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growth & development*,
isolation & purification* Animals British Columbia Light Pacific Ocean Sea Anemones / parasitology* Symbiosis |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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