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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2013
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| Accesso online: | https://doi.org/10.1594/PANGAEA.842185 |
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| _version_ | 1867169100681183232 |
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| author | Yoshimura, T Suzuki, Koji Kiyosawa, H Ono, Tsuneo Hattori, Hiroshi Kuma, Kenshi Nishioka, Jun |
| author_facet | Yoshimura, T Suzuki, Koji Kiyosawa, H Ono, Tsuneo Hattori, Hiroshi Kuma, Kenshi Nishioka, Jun |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Response of phytoplankton to increasing CO2 in seawater in terms of physiology and ecology is key to predicting changes in marine ecosystems. However, responses of natural plankton communities especially in the open ocean to higher CO2 levels have not been fully examined. We conducted CO2 manipulation experiments in the Bering Sea and the central subarctic Pacific, known as high nutrient and low chlorophyll regions, in summer 2007 to investigate the response of organic matter production in iron-deficient plankton communities to CO2 increases. During the 14-day incubations of surface waters with natural plankton assemblages in microcosms under multiple pCO2 levels, the dynamics of particulate organic carbon (POC) and nitrogen (PN), and dissolved organic carbon (DOC) and phosphorus (DOP) were examined with the plankton community compositions. In the Bering site, net production of POC, PN, and DOP relative to net chlorophyll-a production decreased with increasing pCO2. While net produced POC:PN did not show any CO2-related variations, net produced DOC:DOP increased with increasing pCO2. On the other hand, no apparent trends for these parameters were observed in the Pacific site. The contrasting results observed were probably due to the different plankton community compositions between the two sites, with plankton biomass dominated by large-sized diatoms in the Bering Sea versus ultra-eukaryotes in the Pacific Ocean. We conclude that the quantity and quality of the production of particulate and dissolved organic matter may be altered under future elevated CO2 environments in some iron-deficient ecosystems, while the impacts may be negligible in some systems. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_842185 |
| institution | PANGAEA |
| language | en |
| publishDate | 2013 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Impacts of elevated CO2 on particulate and dissolved organic matter production: microcosm experiments using iron-deficient plankton communities in open subarctic waters Yoshimura, T Suzuki, Koji Kiyosawa, H Ono, Tsuneo Hattori, Hiroshi Kuma, Kenshi Nishioka, Jun 19-Hexanoyloxyfucoxanthin; Alkalinity, total; Ammonium; Aragonite saturation state; Bacteria; Bering_Sea; Bicarbonate ion; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, organic, dissolved; Carbon, organic, particulate; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cell density; Ceratium sp.; Chaetoceros sp.; Chlorophyll a; Community composition and diversity; Coscinodiscus sp.; Coulometric titration; Diatoms; Dinobryon balticum; Entire community; Eukaryotes; Event label; EXP; Experiment; Flow cytometry; Fluorescence determination; Fucoxanthin; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gymnodinium sp.; Haptophytes; High Performance Liquid Chromatography (HPLC); Laboratory experiment; Mesodinium rubrum; Micro-nutrients; Neodenticula seminae; Nitrate and Nitrite; Nitrite; Nitrogen, total, particulate; North Pacific; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Open ocean; Parafavella sp.; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; Peridinin; pH, total scale; Phosphate; Phosphorus, organic, dissolved; Potentiometric titration; Prorocentrum sp.; Pseudo-nitzschia sp.; Replicate; Rhizosolenia sp.; Salinity; Silicate; Site; Species; Spectrophotometric; subarctic_Pacific; Synechococcus; Temperate; Temperature, water; Thalassiothrix sp.; Time in days; Tropidoneis sp. Response of phytoplankton to increasing CO2 in seawater in terms of physiology and ecology is key to predicting changes in marine ecosystems. However, responses of natural plankton communities especially in the open ocean to higher CO2 levels have not been fully examined. We conducted CO2 manipulation experiments in the Bering Sea and the central subarctic Pacific, known as high nutrient and low chlorophyll regions, in summer 2007 to investigate the response of organic matter production in iron-deficient plankton communities to CO2 increases. During the 14-day incubations of surface waters with natural plankton assemblages in microcosms under multiple pCO2 levels, the dynamics of particulate organic carbon (POC) and nitrogen (PN), and dissolved organic carbon (DOC) and phosphorus (DOP) were examined with the plankton community compositions. In the Bering site, net production of POC, PN, and DOP relative to net chlorophyll-a production decreased with increasing pCO2. While net produced POC:PN did not show any CO2-related variations, net produced DOC:DOP increased with increasing pCO2. On the other hand, no apparent trends for these parameters were observed in the Pacific site. The contrasting results observed were probably due to the different plankton community compositions between the two sites, with plankton biomass dominated by large-sized diatoms in the Bering Sea versus ultra-eukaryotes in the Pacific Ocean. We conclude that the quantity and quality of the production of particulate and dissolved organic matter may be altered under future elevated CO2 environments in some iron-deficient ecosystems, while the impacts may be negligible in some systems. |
| title | Impacts of elevated CO2 on particulate and dissolved organic matter production: microcosm experiments using iron-deficient plankton communities in open subarctic waters |
| topic | 19-Hexanoyloxyfucoxanthin; Alkalinity, total; Ammonium; Aragonite saturation state; Bacteria; Bering_Sea; Bicarbonate ion; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, organic, dissolved; Carbon, organic, particulate; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cell density; Ceratium sp.; Chaetoceros sp.; Chlorophyll a; Community composition and diversity; Coscinodiscus sp.; Coulometric titration; Diatoms; Dinobryon balticum; Entire community; Eukaryotes; Event label; EXP; Experiment; Flow cytometry; Fluorescence determination; Fucoxanthin; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gymnodinium sp.; Haptophytes; High Performance Liquid Chromatography (HPLC); Laboratory experiment; Mesodinium rubrum; Micro-nutrients; Neodenticula seminae; Nitrate and Nitrite; Nitrite; Nitrogen, total, particulate; North Pacific; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Open ocean; Parafavella sp.; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; Peridinin; pH, total scale; Phosphate; Phosphorus, organic, dissolved; Potentiometric titration; Prorocentrum sp.; Pseudo-nitzschia sp.; Replicate; Rhizosolenia sp.; Salinity; Silicate; Site; Species; Spectrophotometric; subarctic_Pacific; Synechococcus; Temperate; Temperature, water; Thalassiothrix sp.; Time in days; Tropidoneis sp. |
| url | https://doi.org/10.1594/PANGAEA.842185 |