Distribution, associations and role in the biological carbon pump of Pyrosoma atlanticum (Tunicata, Thaliacea) off Cabo Verde, NE Atlantic.
Distribution, associations and role in the biological carbon pump of Pyrosoma atlanticum (Tunicata, Thaliacea) off Cabo Verde, NE Atlantic.
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DOI：
10.1038/s41598-021-88208-5
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发表时间：
2021-04-29
影响因子：
4.6
通讯作者：
Hoving HJT
中科院分区：
文献类型：
--
作者：
Stenvers VI;Hauss H;Osborn KJ;Neitzel P;Merten V;Scheer S;Robison BH;Freitas R;Hoving HJT
胶状浮游动物越来越多地被认为对全球碳循环做出了重大贡献，但这一多样化类群中的许多分类群仍然缺乏研究。在这里，我们调查了佛得角群岛周围水域中的远洋衣藻。通过结合远洋和底栖生物的现场观察、采样和分子遗传分析(条形码，EDNA)，我们揭示：大西洋棘藻的丰度很可能是由当地岛屿诱导的生产力驱动的，它对有机碳输出通量有很大贡献，是一系列生物相互作用的一部分。向下迁移的火焰体估计有13%的粪便颗粒被活跃地输送到混合层以下，相当于每天1.96-64.55亿mg C/m−2和−1的碳通量。我们表明，EDNA分析可以检测到超出其迁移范围的火焰体物质，这表明火焰体在上层水柱以下具有生态影响。垂死的大西洋P.atlanticum菌落平均贡献率为15.09 ± 17.89(S.D.)Mg-C：m-−2到到达岛屿海底斜坡的碳通量。我们的远洋现场观察进一步表明，大西洋拟青霉在水柱中形成了丰富的底物(达到每平方米0.28平方米的底物面积)，动物利用火焰体定居，作为避难所和/或食物来源。总共观察到来自4个门的12个分类群与中水和底栖动物中的火焰体相互作用。
Gelatinous zooplankton are increasingly acknowledged to contribute significantly to the carbon cycle worldwide, yet many taxa within this diverse group remain poorly studied. Here, we investigate the pelagic tunicate Pyrosoma atlanticum in the waters surrounding the Cabo Verde Archipelago. By using a combination of pelagic and benthic in situ observations, sampling, and molecular genetic analyses (barcoding, eDNA), we reveal that: P. atlanticum abundance is most likely driven by local island-induced productivity, that it substantially contributes to the organic carbon export flux and is part of a diverse range of biological interactions. Downward migrating pyrosomes actively transported an estimated 13% of their fecal pellets below the mixed layer, equaling a carbon flux of 1.96–64.55 mg C m−2 day−1. We show that analysis of eDNA can detect pyrosome material beyond their migration range, suggesting that pyrosomes have ecological impacts below the upper water column. Moribund P. atlanticum colonies contributed an average of 15.09 ± 17.89 (s.d.) mg C m−2 to the carbon flux reaching the island benthic slopes. Our pelagic in situ observations further show that P. atlanticum formed an abundant substrate in the water column (reaching up to 0.28 m2 substrate area per m2), with animals using pyrosomes for settlement, as a shelter and/or a food source. In total, twelve taxa from four phyla were observed to interact with pyrosomes in the midwater and on the benthos.
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DOI：
10.1016/s0967-0645(00)00174-0
发表时间：
2001-01-01
影响因子：
3
作者：
Al-Mutairi, H;Landry, MR
通讯作者：
Landry, MR
DOI：
10.1016/0146-6291(78)90590-8
发表时间：
1978-01-01
期刊：
DEEP-SEA RESEARCH
影响因子：
--
作者：
HARBISON, GR;MADIN, LP;SWANBERG, NR
通讯作者：
SWANBERG, NR
影响因子：
4.1
作者：
Cascao, Irma;Domokos, Reka;Silva, Monica A.
通讯作者：
Silva, Monica A.
影响因子：
2.1
作者：
ANDERSEN, V;SARDOU, J
通讯作者：
SARDOU, J
影响因子：
3.1
作者：
Faye, Saliou;Lazar, Alban;Gaye, Amadou T.
通讯作者：
Gaye, Amadou T.