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Temperate reefs in a changing ocean: skeletal carbonate mineralogy of serpulids

机译：不断变化的海洋中的温带珊瑚礁：Serpulids的骨架碳酸盐矿物学

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摘要

We present a review of the published data about serpulid skeletal carbonate geochemistry, augmented with new data from the Southern Hemisphere. We know something about skeletal carbonate mineralogy of 15 % of extant species (n = 52); and about half of extant genera (n = 25). Serpulid worm tubes vary in their skeletal mineralogy from entirely aragonitic (about 24 % of species) to entirely high-Mg calcite (40 %) to mixtures of the two. Mg in calcite ranges from 7 to 15 wt% MgCO_3, with a mean of 11 wt% MgCO_3. Little mineralogical variation within individuals or species can be found in aragonitic specimens, whereas high-Mg calcitic species show somewhat more variability in both calcite and Mg content, and those with mixed mineralogies are highly variable. These three groups correspond broadly with currently accepted clades. Given this strong phylogenetic signal, we analysed the data using phylogenetically independent contrasts, a statistical approach that separates genotypic from phenotypic variability; we found that variations which might be ascribed to environment were generally weak. The mineralogy of serpulid tubes makes them particularly vulnerable to ocean chemistry changes. While some serpulids appear to be able to adjust their tube mineralogy in order to adapt to sea-water chemistry, overall strength and elasticity may be sacrificed when they do. The biodiverse reef habitat provided by serpulids in some temperate regions may be the only complex solid habitat available, and loss or compromise of these temperate reefs will most likely have deleterious flow-on effects on temperate benthic communities.
机译：我们提供了有关蛇毒草碱骨架碳酸盐地球化学已发表数据的综述，并结合了南半球的新数据。我们对现存物种中15％的骨骼碳酸盐矿物学（n = 52）有所了解。和大约一半的现存属（n = 25）。 Serpulid蠕虫管的骨骼矿物学有所不同，从完全文石（占物种的24％）到完全高镁方解石（占40％）以及两者的混合物。方解石中的Mg为7至15重量％MgCO_3，平均为11重量％MgCO_3。在文石标本中，在个体或物种内几乎没有矿物学变化，而高镁钙钙石物种在方解石和镁含量方面都表现出更大的变异性，而具有混合矿物学的物种则高度可变。这三个组大致对应于当前接受的进化枝。鉴于这种强大的系统发育信号，我们使用系统发育独立的对比方法对数据进行了分析，这是一种将基因型与表型变异分开的统计方法。我们发现，可能归因于环境的变化通常很小。 Serpulid管的矿物学使其特别容易受到海洋化学变化的影响。尽管一些蛇蝎类动物似乎能够调节其管的矿物学以适应海水化学反应，但当它们这样做时，可能会牺牲整体强度和弹性。蛇纹石在某些温带地区提供的生物多样性礁生境可能是唯一可用的复杂固体生境，这些温带礁石的丧失或破坏很可能会对温带底栖生物群落产生有害的顺流作用。

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  • 来源
    《Marine biology》 |2013年第9期|2281-2294|共14页
  • 作者

    Abigail M. Smith; Marc Andri Riedi; David J. Winter;

  • 作者单位

    Department of Marine Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand;

    Department of Marine Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand;

    Department of Zoology, Allan Wilson Centre for Molecular Ecology and Evolution, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand;

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