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The impact of benthic algae on the settlement of a reef-building coral

机译:底栖藻类对造礁珊瑚定居的影响

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摘要

The capacity of corals to re-establish in degraded and algal-dominated habitats will depend on the effects of algae on coral settlement and growth. We tested the effect of 11 macroalgal species, of widely different functional-forms, on swimming and settlement by larvae of the coral Platygyra daedalea from the Great Barrier Reef. Algal turfs and the crustose calcareous algae groups had minor effects on coral settlement, while upright calcareous and fleshy macroalgae inhibited settlement. However, the extent of inhibition of larval settlement differed amongst upright macroalgal species, variations that were not well explained by physical differences and probably reflect chemical differences not explained by functional-form. Thus, while algal functional-form is useful in identifying general competition patterns, more detailed taxonomic and chemical approaches may be required to fully understand algal effects on corals. Different macroalgal communities on degraded reefs may have different effects on coral settlement, and hence on coral population resilience.
机译:珊瑚在退化和以藻类为主的栖息地中重建的能力将取决于藻类对珊瑚沉降和生长的影响。我们测试了11种大型藻类物种(功能形式各异)对大堡礁珊瑚鸭嘴兽幼体游泳和定居的影响。藻类草皮和硬质钙质藻类对珊瑚的沉降影响较小,而直立的钙质和肉质大型藻类则抑制了珊瑚的沉降。但是,在直立的大型藻类物种中,抑制幼虫沉降的程度有所不同,这些变化不能通过物理差异很好地解释,并且可能反映出不能通过功能形式解释的化学差异。因此,尽管藻类功能形式可用于识别一般竞争模式,但可能需要更详细的分类学和化学方法才能充分了解藻类对珊瑚的影响。退化珊瑚礁上的不同大型藻类群落可能对珊瑚沉降产生不同的影响,从而对珊瑚种群的复原力产生不同的影响。

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