A Mesoscale Iron Enrichment in the Western Subarctic Pacific Induces a Large Centric Diatom Bloom
| Autor: | Tsuneo Ono, Hiroshi Ogawa, Tatsuo Aono, Hiroshi Kiyosawa, Toshiro Saino, Daisuke Tsumune, Nobuo Tsurushima, Isao Kudo, Yoshiki Sohrin, Yuji Deguchi, Atsushi Tsuda, Akifumi Shimamoto, Kimio Fukami, Yoshifumi Noiri, Kenshi Kuma, Akira Hinuma, Shigenobu Takeda, Koji Suzuki, Masatoshi Kinugasa, Keiri Imai, Akihiro Shiomoto, Takeshi Yoshimura, Heihachiro Tani, Yukihiro Nojiri, Hiroaki Saito, Jun Nishioka |
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| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Chlorophyll
Biogeochemical cycle Iron Iron fertilization Phytoplankton Seawater Biomass Ferrous Compounds Ecosystem Diatoms Nitrates Pacific Ocean Multidisciplinary biology Arctic Regions Atmosphere Chlorophyll A Silicates fungi Carbon Dioxide Eutrophication biology.organism_classification Subarctic climate High-Nutrient low-chlorophyll Oceanography Diatom Environmental science Bloom |
| Zdroj: | Science. 300:958-961 |
| ISSN: | 0036-8075 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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