Importance of copepods versus appendicularians in vertical carbon fluxes in a Swedish fjord
Importance of copepods versus appendicularians in vertical carbon fluxes in a Swedish fjord
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DOI：
10.3354/meps241125
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发表时间：
2002-10
影响因子：
2.5
通讯作者：
C. Vargas;Kajsa Tönnesson;A. Sell;M. Maar;E. Møller;T. Zervoudaki;A. Giannakourou;E. Christou;Suree Satapoomin;J. Petersen;T. Nielsen;P. Tiselius
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文献类型：
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作者：
C. Vargas;Kajsa Tönnesson;A. Sell;M. Maar;E. Møller;T. Zervoudaki;A. Giannakourou;E. Christou;Suree Satapoomin;J. Petersen;T. Nielsen;P. Tiselius
我们检查并量化了古尔马尔峡湾（瑞典西海岸）秋季和春季桡足类和附肢动物对碳垂直通量的贡献。测定了主要桡足类和阑尾类物种的粪便颗粒生成率。此外，还估计了阑尾类 Oikopleura dioica 的房屋生产率。通过在 2 个深度（15 和 30 m）短期（24 小时）部署沉积物收集器来测量色素、粪便碳和阑尾的垂直通量。桡足类在春季和秋季在群落生物量中占主导地位，其颗粒在粪便碳通量中占主导地位。附有碎屑的O. dioica房屋是10月生物碳通量的重要组成部分（15.3 mgC m -2 d -1 ），相当于15 m处桡足类的贡献和30 m处通量的50％。当时，我们观察到水体中建造的房屋损失率为70% d -1 。在春天，虽然贝母在阑尾动物中占主导地位，但它的房屋似乎对生物通量没有贡献。我们的结果表明，卵贝类和贝母类在生物地球化学循环中的作用可能不同。由于阑尾虫对碳通量的重大贡献，它们应该被纳入未来的沿海海洋流动模型中
We examined and quantified the contributions of copepods and appendicularians to the vertical flux of carbon during autumn and spring in Gullmar Fjord (west coast of Sweden). Faecal pellet-production rate was determined for major copepod and appendicularian species. In addition, house-production rates were estimated for the appendicularian Oikopleura dioica. Vertical flux of pigments, faecal carbon and appendicularian houses were measured using short-term (24 h) deploy- ments of sediment traps at 2 depths (15 and 30 m). Copepods dominated the community biomass in both spring and autumn and their pellets dominated the faecal carbon flux. O. dioica houses with at- tached detritus were an important component of the biogenic carbon flux in October (15.3 mgC m -2 d -1 ), equalling the contribution from copepods at 15 m and 50% of the flux at 30 m. At that time, we observed a loss rate of 70% d -1 of the houses produced in the water column. In the spring, although Fritillaria borealis dominated the appendicularians, its houses did not appear to contribute to the bio- genic flux. Our results suggest that oikopleurids and fritillariids may not operate equivalently in bio- geochemical cycles. Because of the significant contribution of appendicularians to carbon fluxes, they should be incorporated in future flow models of coastal oceans