Dissolved inorganic phosphorus, dissolved iron, and Trichodesmium in the oligotrophic South China Sea
Dissolved inorganic phosphorus (DIP) concentrations in the oligotrophic surface waters of the South China Sea decrease from ∼20 nM in March 2000 to ∼5 nM in July 2000, in response to seasonal water column stratification. These minimum DIP concentrations are one order of magnitude higher than those i...
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| Veröffentlicht in: | Global biogeochemical cycles 2003-03, Vol.17 (1), p.8-1-8-10 |
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| container_end_page | 8-10 |
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| container_title | Global biogeochemical cycles |
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| creator | Wu, Jingfeng Chung, Shi-Wei Wen, Liang-Saw Liu, Kon-Kee Chen, Yuh-ling Lee Chen, Houng-Yung Karl, David M. |
| description | Dissolved inorganic phosphorus (DIP) concentrations in the oligotrophic surface waters of the South China Sea decrease from ∼20 nM in March 2000 to ∼5 nM in July 2000, in response to seasonal water column stratification. These minimum DIP concentrations are one order of magnitude higher than those in the P‐limited, iron‐replete stratified surface waters of the western North Atlantic, suggesting that the ecosystem in the South China Sea may be limited by bioavailable nitrogen or some trace nutrient rather than DIP. Nutrient enrichment experiments using either nitrate, phosphate or both indicate that nitrogen limits the net growth of phytoplankton in the South China Sea, at least during March and July 2000. The fixed nitrogen limitation may result from the excess phosphate (N:P |
| doi_str_mv | 10.1029/2002GB001924 |
| format | Article |
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These minimum DIP concentrations are one order of magnitude higher than those in the P‐limited, iron‐replete stratified surface waters of the western North Atlantic, suggesting that the ecosystem in the South China Sea may be limited by bioavailable nitrogen or some trace nutrient rather than DIP. Nutrient enrichment experiments using either nitrate, phosphate or both indicate that nitrogen limits the net growth of phytoplankton in the South China Sea, at least during March and July 2000. The fixed nitrogen limitation may result from the excess phosphate (N:P<16) transported into the South China Sea from the North Pacific relative to microbial population needs, or from iron control of nitrogen fixation. The iron‐limited nitrogen fixation hypothesis is supported by the observation of low population densities of Trichodesmium spp. (<48 × 103 trichomes/m3), the putative N2 fixing cyanobacterium, and with low concentrations of dissolved iron (∼0.2–0.3 nM) in the South China Sea surface water. Our results suggest that nitrogen fixation can be limited by available iron even in regions with a high rate of atmospheric dust deposition such as in the South China Sea.</description><identifier>ISSN: 0886-6236</identifier><identifier>EISSN: 1944-9224</identifier><identifier>DOI: 10.1029/2002GB001924</identifier><language>eng</language><publisher>Blackwell Publishing Ltd</publisher><subject>Cyanophyta ; iron distribution ; Marine ; nitrogen fixation ; nutrient cycles ; Oscillatoria ; phosphate and nitrogen ; South China Sea</subject><ispartof>Global biogeochemical cycles, 2003-03, Vol.17 (1), p.8-1-8-10</ispartof><rights>Copyright 2003 by the American Geophysical Union.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4708-6cc104448a331ce26a3a47f04e455aa612e0691763662249cb1670d159f90b0f3</citedby><cites>FETCH-LOGICAL-a4708-6cc104448a331ce26a3a47f04e455aa612e0691763662249cb1670d159f90b0f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2002GB001924$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2002GB001924$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,1427,11493,27901,27902,45550,45551,46384,46443,46808,46867</link.rule.ids></links><search><creatorcontrib>Wu, Jingfeng</creatorcontrib><creatorcontrib>Chung, Shi-Wei</creatorcontrib><creatorcontrib>Wen, Liang-Saw</creatorcontrib><creatorcontrib>Liu, Kon-Kee</creatorcontrib><creatorcontrib>Chen, Yuh-ling Lee</creatorcontrib><creatorcontrib>Chen, Houng-Yung</creatorcontrib><creatorcontrib>Karl, David M.</creatorcontrib><title>Dissolved inorganic phosphorus, dissolved iron, and Trichodesmium in the oligotrophic South China Sea</title><title>Global biogeochemical cycles</title><addtitle>Global Biogeochem. Cycles</addtitle><description>Dissolved inorganic phosphorus (DIP) concentrations in the oligotrophic surface waters of the South China Sea decrease from ∼20 nM in March 2000 to ∼5 nM in July 2000, in response to seasonal water column stratification. These minimum DIP concentrations are one order of magnitude higher than those in the P‐limited, iron‐replete stratified surface waters of the western North Atlantic, suggesting that the ecosystem in the South China Sea may be limited by bioavailable nitrogen or some trace nutrient rather than DIP. Nutrient enrichment experiments using either nitrate, phosphate or both indicate that nitrogen limits the net growth of phytoplankton in the South China Sea, at least during March and July 2000. The fixed nitrogen limitation may result from the excess phosphate (N:P<16) transported into the South China Sea from the North Pacific relative to microbial population needs, or from iron control of nitrogen fixation. The iron‐limited nitrogen fixation hypothesis is supported by the observation of low population densities of Trichodesmium spp. (<48 × 103 trichomes/m3), the putative N2 fixing cyanobacterium, and with low concentrations of dissolved iron (∼0.2–0.3 nM) in the South China Sea surface water. Our results suggest that nitrogen fixation can be limited by available iron even in regions with a high rate of atmospheric dust deposition such as in the South China Sea.</description><subject>Cyanophyta</subject><subject>iron distribution</subject><subject>Marine</subject><subject>nitrogen fixation</subject><subject>nutrient cycles</subject><subject>Oscillatoria</subject><subject>phosphate and nitrogen</subject><subject>South China Sea</subject><issn>0886-6236</issn><issn>1944-9224</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNp9kD9PwzAQxS0EEqWw8QE8MTVwdlzHHqHQgFTKUP6MlkkcYkjjYidAvz1GRcDEcLrh_d7T3UPokMAxASpPKADNzwCIpGwLDYhkLJGUsm00ACF4wmnKd9FeCM-RYeOxHCBzbkNwzZspsW2df9KtLfCqdiGO78MIl7-6d-0I67bEt94WtStNWNp-GX24qw12jX1ynXerOiYsXN_VeFLbVuOF0ftop9JNMAffe4juphe3k8tkdpNfTU5niWYZiIQXBQHGmNBpSgpDuU6jUAEz8VitOaEGuCQZTzmPb8nikfAMSjKWlYRHqNIhOtrkrrx77U3o1NKGwjSNbo3rgyJCMJYJGsHRBiy8C8GbSq28XWq_VgTUV5fqb5cRhw3-bhuz_pdV-dlEZCJako3Fhs58_Fi0f1E8S7Oxepjnaj69n1-LB6Yg_QR6W4Nn</recordid><startdate>200303</startdate><enddate>200303</enddate><creator>Wu, Jingfeng</creator><creator>Chung, Shi-Wei</creator><creator>Wen, Liang-Saw</creator><creator>Liu, Kon-Kee</creator><creator>Chen, Yuh-ling Lee</creator><creator>Chen, Houng-Yung</creator><creator>Karl, David M.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>200303</creationdate><title>Dissolved inorganic phosphorus, dissolved iron, and Trichodesmium in the oligotrophic South China Sea</title><author>Wu, Jingfeng ; Chung, Shi-Wei ; Wen, Liang-Saw ; Liu, Kon-Kee ; Chen, Yuh-ling Lee ; Chen, Houng-Yung ; Karl, David M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4708-6cc104448a331ce26a3a47f04e455aa612e0691763662249cb1670d159f90b0f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Cyanophyta</topic><topic>iron distribution</topic><topic>Marine</topic><topic>nitrogen fixation</topic><topic>nutrient cycles</topic><topic>Oscillatoria</topic><topic>phosphate and nitrogen</topic><topic>South China Sea</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wu, Jingfeng</creatorcontrib><creatorcontrib>Chung, Shi-Wei</creatorcontrib><creatorcontrib>Wen, Liang-Saw</creatorcontrib><creatorcontrib>Liu, Kon-Kee</creatorcontrib><creatorcontrib>Chen, Yuh-ling Lee</creatorcontrib><creatorcontrib>Chen, Houng-Yung</creatorcontrib><creatorcontrib>Karl, David M.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Global biogeochemical cycles</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wu, Jingfeng</au><au>Chung, Shi-Wei</au><au>Wen, Liang-Saw</au><au>Liu, Kon-Kee</au><au>Chen, Yuh-ling Lee</au><au>Chen, Houng-Yung</au><au>Karl, David M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dissolved inorganic phosphorus, dissolved iron, and Trichodesmium in the oligotrophic South China Sea</atitle><jtitle>Global biogeochemical cycles</jtitle><addtitle>Global Biogeochem. Cycles</addtitle><date>2003-03</date><risdate>2003</risdate><volume>17</volume><issue>1</issue><spage>8-1</spage><epage>8-10</epage><pages>8-1-8-10</pages><issn>0886-6236</issn><eissn>1944-9224</eissn><abstract>Dissolved inorganic phosphorus (DIP) concentrations in the oligotrophic surface waters of the South China Sea decrease from ∼20 nM in March 2000 to ∼5 nM in July 2000, in response to seasonal water column stratification. These minimum DIP concentrations are one order of magnitude higher than those in the P‐limited, iron‐replete stratified surface waters of the western North Atlantic, suggesting that the ecosystem in the South China Sea may be limited by bioavailable nitrogen or some trace nutrient rather than DIP. Nutrient enrichment experiments using either nitrate, phosphate or both indicate that nitrogen limits the net growth of phytoplankton in the South China Sea, at least during March and July 2000. The fixed nitrogen limitation may result from the excess phosphate (N:P<16) transported into the South China Sea from the North Pacific relative to microbial population needs, or from iron control of nitrogen fixation. The iron‐limited nitrogen fixation hypothesis is supported by the observation of low population densities of Trichodesmium spp. (<48 × 103 trichomes/m3), the putative N2 fixing cyanobacterium, and with low concentrations of dissolved iron (∼0.2–0.3 nM) in the South China Sea surface water. Our results suggest that nitrogen fixation can be limited by available iron even in regions with a high rate of atmospheric dust deposition such as in the South China Sea.</abstract><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2002GB001924</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| source | Wiley-Blackwell AGU Digital Library; Wiley Online Library Journals Frontfile Complete; Wiley Online Library Free Content; EZB-FREE-00999 freely available EZB journals |
| subjects | Cyanophyta iron distribution Marine nitrogen fixation nutrient cycles Oscillatoria phosphate and nitrogen South China Sea |
| title | Dissolved inorganic phosphorus, dissolved iron, and Trichodesmium in the oligotrophic South China Sea |
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