What Feeds the Benthos in the Arctic Basins? Assembling a Carbon Budget for the Deep Arctic Ocean
What Feeds the Benthos in the Arctic Basins? Assembling a Carbon Budget for the Deep Arctic Ocean
复制标题
北极盆地底栖生物的食物是什么？
DOI：
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发表时间：
2020
影响因子：
3.7
通讯作者：
A. Boetius
中科院分区：
文献类型：
--
作者：
I. Wiedmann;E. Ershova;B. Bluhm;E. Nöthig;R. Gradinger;K. Kosobokova;A. Boetius
北冰洋的一半是深海（>1000米），这一地区目前正在从永久性冰盖过渡到季节性无冰。尽管发生了这些巨大的变化，但仍不清楚北极盆地深处的生物是如何分布的，特别是什么养活了它们。在这里，我们总结了自和异养生物在底栖，远洋和近海域的北冰洋盆地从过去的三十年的数据，并把这个地区的有机碳预算。根据预算，我们调查我们目前对初级和次级生产以及垂直碳通量的理解是否与目前深海底栖生物对碳需求的估计相平衡。乍一看，我们的预算确定了初级生产的碳供应之间的不匹配（3-46 g C m−2 yr−1），生活在大洋中的生物的碳需求（7-17 g C m−2）和底栖领域（< 5 g C m−2 yr−1）与低垂直碳输出（200 m：0.1-1.5 g C m−2 yr−1，3000-4000 m：0.01-0.73 g C m−2 yr−1）。关闭预算，我们建议，情节事件的大型，快速下沉的冰藻聚集体，出口的死浮游动物，以及大型食品福尔斯需要量化和包括在内。这项工作强调了更好地了解北极深海盆地碳供应和需求的数量、物候和区域性的明确必要性，这将使我们能够评估生态系统未来可能发生的变化。
Half of the Arctic Ocean is deep sea (>1000 m), and this area is currently transitioning from being permanently ice-covered to being seasonally ice-free. Despite these drastic changes, it remains unclear how organisms are distributed in the deep Arctic basins, and particularly what feeds them. Here, we summarize data on auto- and heterotrophic organisms in the benthic, pelagic, and sympagic realm of the Arctic Ocean basins from the past three decades and put together an organic carbon budget for this region. Based on the budget, we investigate whether our current understanding of primary and secondary production and vertical carbon flux are balanced by the current estimates of the carbon demand by deep-sea benthos. At first glance, our budget identifies a mismatch between the carbon supply by primary production (3–46 g C m−2 yr−1), the carbon demand of organisms living in the pelagic (7–17 g C m−2) and the benthic realm (< 5 g C m−2 yr−1) versus the low vertical carbon export (at 200 m: 0.1–1.5 g C m−2 yr−1, at 3000–4000 m: 0.01–0.73 g C m−2 yr−1). To close the budget, we suggest that episodic events of large, fast sinking ice algae aggregates, export of dead zooplankton, as well as large food falls need to be quantified and included. This work emphasizes the clear need for a better understanding of the quantity, phenology, and the regionality of carbon supply and demand in the deep Arctic basins, which will allow us to evaluate how the ecosystem may change in the future.
在温暖、酸化的海洋条件下，附肢浮游动物年龄碳循环增加
影响因子：
4.5
作者：
Winder M;Bermudez JR;Bouquet JM;Hansen T;Brandes J;Berger S;Sazhin A; Jens C. Nejstgaard;Ulf BåmstedtHans H. Jakobsen;Jörg Dutz;Frischer ME;Troedsson C;Thompson E
通讯作者：
Thompson E