Importance of the contribution of Limacina helicina faecal pellets to the carbon pump in Terra Nova Bay (Antarctica)
Importance of the contribution of Limacina helicina faecal pellets to the carbon pump in Terra Nova Bay (Antarctica)
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DOI：
10.1093/plankt/fbp108
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发表时间：
2010-02
影响因子：
2.1
通讯作者：
C. Manno;V. Tirelli;A. Accornero;S. F. Umani
中科院分区：
文献类型：
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作者：
C. Manno;V. Tirelli;A. Accornero;S. F. Umani
随着关于海洋酸化及其对钙化生物的影响的争论的增加，对翼足类动物 Limacina helicina 在生态系统中的作用的理解变得更加有趣。 2006 年 1 月和 2 月在 Terra Nova Bay Polynya（罗斯海）进行了四次孵化实验，以鉴定由 L. helicina 产生的粪便颗粒 (FP)。 1 月和 2 月的平均 FP 生产率分别为 6.1 ± 1.3 和 10.9 + 2.1 颗粒天 -1 个个体 -1，L helicina 产生的 FP 呈椭圆形，边更长。对螺旋藻粪便的鉴定使我们能够量化 1998 年至 2001 年同一地区部署的沉积物收集器收集的材料中螺旋藻 FP 的数量。我们发现螺旋藻 FP 通量范围为 71 × 10 3 FP m -2year -1 至 362 × 10 3 FP m - 2year -1，并在每年 3 月至 4 月达到最大值年。该生物体的FPs通量贡献了颗粒有机碳通量的19%。如果由于极地和亚极地水域预计的酸化而导致螺旋藻种群数量下降，则可以修改碳泵。
The understanding of the role of the pteropods Limacina helicina in the ecosystem has become of greater interest as the debate on ocean acidification and its consequences for calcifying organisms has increased. Four incubation experiments were carried out in January and February 2006 in Terra Nova Bay Polynya (Ross Sea) to identify the faecal pellets (FPs) produced by L. helicina. Mean FP production rates were 6.1 ± 1.3 and 10.9 + 2.1 pellets day -1 individual -1 in January and February, respectively FPs produced by L helicina had an oval shape with a more lengthened side. The identification of L. helicina faeces allowed us to quantify the amounts of L helicina FPs in the material collected by sediment traps deployed in the same area from 1998 to 2001. We found that L. helicina FPs flux ranged from 71 × 10 3 FP m -2 year -1 to 362 × 10 3 FP m - 2 year -1 and reach maximum values in March-April every year. The FPs flux of this organism contributed 19% of the particle organic carbon flux. The carbon pump may be modified if the L helicina population declines as a consequence of the predicted acidification in polar and subpolar waters.