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首页> 外文期刊>Estuarine Coastal and Shelf Science >Facilitation of macroalgae by the sedimentary tube forming polychaete Diopatra cuprea
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Facilitation of macroalgae by the sedimentary tube forming polychaete Diopatra cuprea

机译：沉积管形成多壳Diopatra cuprea促进大型藻类的生长

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Marine foundation organisms such as seagrasses, corals, and kelps facilitate the distribution of numerous organisms by creating refuges from environmental stressors and by providing food and substrate for settlement and growth. Barren soft-sediment systems often have faunal organisms that facilitate other species by habitat modification. We investigated how an abundant (21 m~(-2)) tube cap forming polychaete, Diopatra cuprea, facilitates macroalgal distribution in Hog Island Bay, a turbid shallow tidal lagoon in Virginia (USA). Seventy percent of the number of mudflat macroalgae were found incorporated into protruding D. cuprea tube caps and field experiments showed that D. cuprea facilitates algal persistence by providing a stable substrate retaining algae against hydrodynamic forces such as tidal flushing and storm surge. If tube caps were removed, simulating storm-induced erosion, they were rebuilt within days and new drift algae incorporated. Also, D. cuprea facilitated the algal assemblage by fragmenting thalli in the attachment process, thereby ensuring a constant fragment supply for vegetative re-growth if storm-induced pruning occurs. On a species-specific level, Gracilaria verrucosa and Ulva curvata benefited more from tube cap construction compared to Fucus vesiculosus, Agardhiella subulata and the alien Codium fragile ssp. tomentosoides. This was partly because G. verrucosa and U. curvata were incorporated and fragmented more readily, and partly because they probably have physiological, morphological and biomechanical traits that enable them to better co-exist with D. cuprea. These results suggest that macroalgal distribution throughout Hog Island Bay to a large extent is linked to the distribution of D. cuprea. The processes of algal attachment, retainment, recovery, re-growth and fragmentation, can have important ecosystem implications because of the sheer abundance of the Diopatra-Gracilaria/Ulva association.
机译：海草，珊瑚和海带等海洋基础生物通过在环境压力源中建立庇护所，并提供食物和底物来定居和生长，从而促进了许多生物的分布。贫瘠的软沉积系统通常具有通过改变栖息地来促进其他物种的动植物。我们研究了形成多毛cha的Diopatra cuprea丰富的（21 m〜（-2））管帽如何促进了美国弗吉尼亚州一个浑浊的浅潮泻湖Hog Island Bay的大型藻类分布。已发现百分之七十的滩涂大型藻类被掺入到突出的铜麦草管帽中，田间试验表明，铜麦草通过提供稳定的基质滞留藻类来抵抗潮汐冲刷和风暴潮等流体动力，从而促进了藻类的持久性。如果将管帽取下，模拟风暴引起的侵蚀，则可在数天内对其进行重建，并加入新的浮藻。同样，铜绿假单胞菌通过在附着过程中使thalli碎裂而促进了藻类的聚集，从而确保了由暴风雨引起的修剪过程中营养再生的恒定碎片供应。在特定物种的水平上，与豌豆（Fusus vesiculosus），阿加德氏菌（Agardhiella subulata）和外来的脆弱的小球藻（Codium脆弱的ssp）相比，江南河cil和草Ul更受益于管帽的建造。绒毛类。这部分是由于疣状假单胞菌和弯曲弯曲假单胞菌更容易掺入和破碎，部分是因为它们可能具有生理，形态和生物力学特性，使其能够更好地与D. cuprea共存。这些结果表明，整个猪岛湾的大型藻类分布在很大程度上与D. cuprea的分布有关。由于Diopatra-Gracilaria / Ulva协会的绝对丰富性，藻类的附着，滞留，恢复，重新生长和破碎的过程可能具有重要的生态系统意义。

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