Klicpera, André; Taylor, Paul D; Westphal, Hildegard (2013): Bryoliths constructed by bryozoans in symbiotic associations with hermit crabs, Golfe d'Arguin, Mauritania [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.836183, Supplement to: Klicpera, A et al. (2013): Bryoliths constructed by bryozoans in symbiotic associations with hermit crabs in a tropical heterozoan carbonate system, Golfe d'Arguin, Mauritania. Marine Biodiversity, 43(4), 429-444, https://doi.org/10.1007/s12526-013-0173-4
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Abstract:
The Golfe d'Arguin offshore of northern Mauritania hosts a rare modern analogue for heterozoan carbonate production in a tropical marine setting. Dominated by ocean upwelling and with additional fertilisation by iron-rich aeolian dust, this naturally eutrophic marine environment lacks typical photozoan communities. A highly productive, tropical cosmopolitan biota dominated by molluscs and suspension-feeders such as bryozoans and balanids characterises the carbonate-rich surface sediments. Overall biodiversity is relatively low and the species present are tolerant against the eutrophic and low-light conditions, the strong hydrodynamic regime governed by ocean upwelling, and the unstable, soft-bottom seafloor with few hard substrata. Here, we describe an ectosymbiosis between the hermit crab Pseudopagurus granulimanus (Miers, 1881) and monospecific assemblages of the encrusting cheilostome bryozoan Acanthodesia commensale (Kirkpatrick and Metzelaar, 1922) that cohabits vacant gastropod shells. Nucleating on an empty gastropod shell, the bryozoan colonies form multilamellar skeletal crusts that produce spherical encrustations and extend the living chamber of the hermit crab through helicospiral tubular growth. This non-obligate mutualistic symbiosis illustrates the adaptive capabilities and benefits from a close partnership in a complex marine environment, driven by trophic conditions, high water energies and instable substratum. Sectioned bryoliths show that between 49 and 97 % of the solid volume of the specimens consists of bryozoan skeleton.
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Median Latitude: 20.127769 * Median Longitude: -17.196178 * South-bound Latitude: 19.698380 * West-bound Longitude: -17.340983 * North-bound Latitude: 20.880117 * East-bound Longitude: -16.917210
Date/Time Start: 2010-10-31T13:47:00 * Date/Time End: 2010-10-31T13:47:00
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Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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Datasets listed in this publication series
- Klicpera, A; Taylor, PD; Westphal, H (2013): (Table 2) Bryolith specimens sampled from the Baie du Lévrier and the outer Banc d'Arguin. https://doi.org/10.1594/PANGAEA.836168
- Klicpera, A; Taylor, PD; Westphal, H (2013): (Table 3) Astogenetic size variation of bryolith forming bryozoans identified as Acanthodesia commensale. https://doi.org/10.1594/PANGAEA.836182