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Biomechanics and mass mortality of erect bryozoans on a coral reef
Barnes, D.K.A.; Whittington, M. (1999). Biomechanics and mass mortality of erect bryozoans on a coral reef. J. Mar. Biol. Ass. U.K. 79(4): 745-747. https://dx.doi.org/10.1017/S0025315498000903
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154; e-ISSN 1469-7769
Peer reviewed article  
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Trefwoorden
    Aquatic communities > Benthos > Zoobenthos
    Aquatic organisms > Marine organisms > Aquatic animals > Marine invertebrates
    Colonization
    Forces (mechanics) > Loads (forces) > Current forces
    Injuries
    Mortality causes
    Motion > Water motion > Water currents > Bottom currents
    Population dynamics
    Population functions > Growth
    Reefs > Biogenic deposits > Coral reefs
    Cigliscula [WoRMS]
    Marien/Kust
Auteurs  Top 
  • Barnes, D.K.A.
  • Whittington, M.
Abstract
    The bryozoan Cigclisula sp., is a heavily calcified erect species which occurs abundantly in the shallow sublittoral coral reef at Quilaluia Island, Quirimba Archipelago, northern Mozambique. It grows in an arborescent bilaminate form termed adeoniform on the undersides of coral heads or other available bioconstructed hard substratum. The geography and bathymetry of the area results in periodic high and complex current regimes often carrying water borne debris. If this periodic force overcomes the structural integrity of Cigclisula sp. either the outermost branches break or the colony topples at the base. The local population was dominated by young individuals: nearly 40% of the sample population had ten branches or fewer and less than 10% had more than 50 branches (these could be ascertained as young due to the lower proportion of damaged colonies with less than or equal to 10 branches; Figure 1). The only size group with no damaged specimens (branch breakage) were those with less than or equal to 5 branches. The mean proportion of branches broken significantly increased with increasing colony size. After one year a population of Cigclisula sp., initially comprising 30 colonies (encompassing the entire size spectrum of colonies), consisted of just one small specimen.
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