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首页> 外文期刊>Marine biology >Stalked tunicates Boltenia ovifera form biogenic habitat in the rocky subtidal zone of Nova Scotia
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Stalked tunicates Boltenia ovifera form biogenic habitat in the rocky subtidal zone of Nova Scotia

机译：在新斯科舍省的岩石潮下带，茎被膜的Boltenia ovifera形成了生物栖息地。

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摘要

The stalked tunicate Boltenia ovifera is widely distributed in the Arctic and North Atlantic oceans on rocky substrata at 10-300 m depth, although its ecological role in benthic communities is poorly understood. The distribution and abundance of B. ovifera were recorded at 10-100 m depth in towed-video transects in November 2011 and in June, July, and November 2012 off a wave-exposed headland near Halifax, Nova Scotia. Specimens also were collected at 30 m depth using SCUBA (44°26.88′N, 63°31.59′W) in September 2012. Areas dominated by B. ovifera had densities of 10-100 individuals m~2 on rocky substrata at 30-60 m depth. These tunicate beds often were associated with sparse kelp (Agarum clathratum) and turf-forming red algae. A generalized additive model indicated that depth, substrate type, and benthic algal type were strong predictors of tunicate abundance. Twenty-two epibiotic species were found on specimens of B. ovifera, including juvenile conspecifics. Filter-feeding macroinvertebrates, including anemones and soft corals, were more abundant in areas with B. ovifera than in areas without these tunicates. Our findings suggest that beds of B. ovifera can act as biogenic habitat to enhance local species richness in the rocky subtidal zone of Nova Scotia.
机译：茎被膜的卵形Boltenia ovifera广泛分布在北极和北大西洋的岩石地层，深度为10-300 m，尽管人们对其底栖生物的生态作用了解甚少。在2011年11月和2011年6月，7月和2012年11月在新斯科舍省哈利法克斯附近一个受波涛照射的岬角附近的拖曳视频样带中记录了卵形芽孢杆菌的分布和丰度，深度为10-100 m。 2012年9月，还使用SCUBA（44°26.88'N，63°31.59'W）在30 m深度处收集了标本。卵圆芽孢杆菌占主导地位的区域在30-60的岩石地下密度为10-100个人m〜2米深。这些被膜层床经常与稀疏海带（Agarum clathratum）和形成草皮的红藻有关。广义的加性模型表明深度，基质类型和底栖藻类类型是被膜丰度的强烈预测指标。在卵形芽孢杆菌的标本中发现了22种表观生物物种，包括幼种。滤过的大型无脊椎动物，包括海葵和软珊瑚，在卵形双歧杆菌区域比没有这些被膜的区域更为丰富。我们的发现表明卵形芽孢杆菌的床可以作为生物起源栖息地，以增强新斯科舍省岩石潮下带的当地物种丰富度。

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  • 来源
    《Marine biology》 |2014年第6期|1375-1383|共9页
  • 作者

    Fiona T.-Y. Francis; Karen Filbee-Dexter Robert; E. Scheibling;

  • 作者单位

    Department of Biology, Dalhousie University, Halifax, NS B3H 4J1, Canada,Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada;

    Department of Biology, Dalhousie University, Halifax, NS B3H 4J1, Canada;

    Department of Biology, Dalhousie University, Halifax, NS B3H 4J1, Canada;

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