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首页> 外文期刊>Marine biology >Biodiversity and rockfish recruitment in sponge gardens and bioherms of southern British Columbia, Canada
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Biodiversity and rockfish recruitment in sponge gardens and bioherms of southern British Columbia, Canada

机译：加拿大不列颠哥伦比亚省南部的海绵花园和生物群落中的生物多样性和石鱼招募

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摘要

In the Strait of Georgia and Howe Sound, British Columbia, colonies of individual cloud sponges, growing on rock (known as sponge gardens) receive resource subsidies from the high biodiversity of epifauna on adjacent rock habitats. Bioherms are reefs of glass sponges living on layers of dead sponges. In the same area as the sponge gardens, newly discovered bioherms in Howe Sound, BC (49.34.67 N, 123.16.26 W) at depths of 28- to 35-m are constructed exclusively by Aphrocallistes vastus, the cloud sponge. The sponge gardens had much higher taxon richness than the bioherms. The sponge garden had 106 species from 10 phyla, whereas the bioherm had only 15 species from 5 phyla. For recruiting juvenile rockfish (quillback, Sebastes maliger), the food subsidy of sponge gardens appears to be missing on bioherms of cloud sponge, where biodiversity is relatively low. While adult and subadult rockfishes (S. maliger, S. ruberrimus, S. proriger, and S. eloneatus) were present on bioherms. no evidence forrnobserved, whereas the sponge gardens supported high densities of newly recruited S. maliger, perhaps owing to the combination of both refuge and feeding opportunities. These results indicate that sponge gardens form a habitat for early stages of inshore S. maliger, whereas A. vastus bioherms are associated only with older juvenile and adult rockfisshes.
机译：在不列颠哥伦比亚省的佐治亚州海峡和豪恩桑德海峡，生长在岩石上的单个云海绵菌落（被称为海绵花园）从邻近岩石生境中的表皮动物的高度生物多样性中获得资源补贴。生物herms是生活在死海绵层上的玻璃海绵礁。在与海绵花园相同的区域中，新发现的生物草本在卑诗省Howe Sound（49.34.67 N，123.16.26 W）的深度为28-35 m，由海绵状的Aphrocallistes hugeus专门建造。海绵园的生物分类丰富度比生物群落高得多。海绵花园有来自10种门的106种，而生物群落只有来自5种门的15种。对于招募幼年石鱼（美洲象，Sebastes maliger），似乎在生物多样性相对较低的云海绵生物群落中缺少海绵花园的食物补贴。成年和亚成年石鱼（S. maliger，S。ruberrimus，S。proriger和S. eloneatus）都出现在生物礁上。没有证据可知，而海绵花园则支持了新近招募的S. maliger的高密度，这可能是由于庇护和觅食机会的结合。这些结果表明，海绵花园形成了近海S. maliger早期的栖息地，而A. gigusus生物群落仅与年龄较大的幼年和成年岩礁相关。

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  • 来源
    《Marine biology》 |2009年第11期|2247-2254|共8页
  • 作者

    Jeffrey Burton Marliave; Kim W. Conway; Donna M. Gibbs; Andy Lamb; Charles Gibbs;

  • 作者单位

    Vancouver Aquarium, PO Box 3232, Vancouver, BC V6B 3X8, Canada;

    Geological Survey of Canada, PO Box 6000, Sidney, BC V8L 4B2, Canada;

    Vancouver Aquarium, PO Box 3232, Vancouver, BC V6B 3X8, Canada Pacific Marine Life Surveys, 2121 Rindall Avenue, Port Coquitlam, BC V3C 1T9, Canada;

    Pacific Marine Life Surveys, 2121 Rindall Avenue, Port Coquitlam, BC V3C 1T9, Canada;

    Pacific Marine Life Surveys, 2121 Rindall Avenue, Port Coquitlam, BC V3C 1T9, Canada;

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