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Distribution Patterns of Zoochlorellae and Zooxanthellae Hosted by Two Pacific Northeast Anemones, Anthopleura elegantissima and A. zanthogrammica


Bates, AE and McLean, L and Laing, P and Raeburn, LA and Hare, C, Distribution Patterns of Zoochlorellae and Zooxanthellae Hosted by Two Pacific Northeast Anemones, Anthopleura elegantissima and A. zanthogrammica, Biological Bulletin, 218, (3) pp. 237-247. ISSN 0006-3185 (2010) [Refereed Article]

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Copyright 2010 Marine Biological Laboratory

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DOI: doi:10.1086/BBLv218n3p237


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 mol quanta m2 s1 than it was for ZX from A. elegantissima (respectively, 7.3 vs. 6.2) and relatively lower at 40 mol quanta m2 s1 (3.9 vs. 5.6). Our data indicate host-specific differences in symbiont distributions and MI when extrinsic physical parameters were similar

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Ecological physiology
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Bates, AE (Dr Amanda Bates)
ID Code:76453
Year Published:2010
Web of Science® Times Cited:8
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2012-03-06
Last Modified:2012-07-03

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