A Mesoscale Iron Enrichment in the Western Subarctic Pacific Induces a Large Centric Diatom Bloom
A Mesoscale Iron Enrichment in the Western Subarctic Pacific Induces a Large Centric Diatom Bloom
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DOI：
10.1126/science.1082000
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发表时间：
2003-05
期刊：
影响因子：
56.9
通讯作者：
A. Tsuda;S. Takeda;H. Saito;J. Nishioka;Y. Nojiri;I. Kudo;H. Kiyosawa;A. Shiomoto;K. Imai;T. Ono;A. Shimamoto;D. Tsumune;T. Yoshimura;T. Aono;A. Hinuma;Masatoshi Kinugasa;Koji Suzuki;Y. Sohrin;Yoshifumi Noiri;H. Tani;Y. Deguchi;N. Tsurushima;H. Ogawa;K. Fukami;K. Kuma;T. Saino
中科院分区：
文献类型：
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作者：
A. Tsuda;S. Takeda;H. Saito;J. Nishioka;Y. Nojiri;I. Kudo;H. Kiyosawa;A. Shiomoto;K. Imai;T. Ono;A. Shimamoto;D. Tsumune;T. Yoshimura;T. Aono;A. Hinuma;Masatoshi Kinugasa;Koji Suzuki;Y. Sohrin;Yoshifumi Noiri;H. Tani;Y. Deguchi;N. Tsurushima;H. Ogawa;K. Fukami;K. Kuma;T. Saino
我们在亚北极北太平洋进行了铁限制假说的原位测试。溶解铁的单一富集导致浮游植物现存量大幅增加，常量营养素和溶解二氧化碳减少。的优势浮游植物种类转移后，铁除了从羽状硅藻的中心硅藻，角毛藻debilis，表现出非常高的增长率，每天2.6倍。我们的结论是，铁的生物利用度调节浮游植物生物量的大小和关键的浮游植物物种，确定高硝酸盐，低叶绿素沃茨的铁供应的地球化学敏感性。
We have performed an in situ test of the iron limitation hypothesis in the subarctic North Pacific Ocean. A single enrichment of dissolved iron caused a large increase in phytoplankton standing stock and decreases in macronutrients and dissolved carbon dioxide. The dominant phytoplankton species shifted after the iron addition from pennate diatoms to a centric diatom, Chaetoceros debilis, that showed a very high growth rate, 2.6 doublings per day. We conclude that the bioavailability of iron regulates the magnitude of the phytoplankton biomass and the key phytoplankton species that determine the biogeochemical sensitivity to iron supply of high-nitrate, low-chlorophyll waters.