Nitrogen uptake by size-fractionated plankton in permanently well-mixed temperate coastal waters
Nitrogen uptake by net- (15–200 μm), nano- (1–15 μm) and picoplankton (1 μm, and mediated by free-living and particle-bound bacteria.
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| Veröffentlicht in: | Journal of plankton research 2004-10, Vol.26 (10), p.1207-1218 |
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| container_title | Journal of plankton research |
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| creator | Wafar, Mohideen L’Helguen, Stéphane Raikar, Varsha Maguer, Jean-François Corre, Pierre Le |
| description | Nitrogen uptake by net- (15–200 μm), nano- (1–15 μm) and picoplankton (1 μm, and mediated by free-living and particle-bound bacteria. |
| doi_str_mv | 10.1093/plankt/fbh110 |
| format | Article |
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Though assimilable dissolved N nutrient pool at both stations was nitrate-dominated, characteristics of biomass and N uptake by netplankton differed from conventional patterns in two respects. In the first, biomass (26–30%) and N uptake (36–43%) were less important than those of nanoplankton. In the second, the netplankton did not show any marked preference for nitrate over ammonium (nitrate to ammonium uptake ratios of 0.98 and 1.08). In contrast, nanoplankton had a preference for ammonium over nitrate (ammonium to nitrate uptake ratios of 2 and 1.2). N uptake by picoplankton was only 8% of total N uptake at both stations and was supported mainly by regenerated N (66% ammonium and 17% urea), with nitrate uptake detectable in only one instance and nitrite uptake in none. Substrate-dependent uptake of ammonium in all fractions and a higher ammonium uptake in the nanoplankton fraction in summer at both stations when ambient ammonium concentrations were high indicated that while nitrate may satisfy a part of N requirements, availability of ammonium and its flux through nanoplankton determine the magnitude of total N uptake in these waters. Most of the N uptake in picoplankton appears to be autotrophic, suggesting that a substantial part of heterotrophic uptake, if any, could be localized in the fractions >1 μm, and mediated by free-living and particle-bound bacteria.</description><identifier>ISSN: 0142-7873</identifier><identifier>ISSN: 1464-3774</identifier><identifier>EISSN: 1464-3774</identifier><identifier>DOI: 10.1093/plankt/fbh110</identifier><identifier>CODEN: JPLRD9</identifier><language>eng</language><publisher>Oxford: Oxford University Press</publisher><subject>Ammonium ; Ammonium compounds ; Animal and plant ecology ; Animal, plant and microbial ecology ; Bacteria ; Biological and medical sciences ; Biomass ; Chemical cycles ; Coastal waters ; Cycles ; Earth Sciences ; Fundamental and applied biological sciences. Psychology ; Marine ; Nannoplankton ; Nitrates ; Oceanography ; Picoplankton ; Plankton ; Ratios ; Sciences of the Universe ; Sea water ecosystems ; Synecology ; Uptake ; Urea</subject><ispartof>Journal of plankton research, 2004-10, Vol.26 (10), p.1207-1218</ispartof><rights>2005 INIST-CNRS</rights><rights>Copyright Oxford University Press(England) Oct 1, 2004</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c500t-6c26efd7917f50ccdafc65dc8917fc5ae48d072d5d1bfd5d0f2345aca634c3583</citedby><orcidid>0000-0003-3069-2821 ; 0000-0002-2395-606X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,778,782,883,27911,27912</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16166033$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-02315174$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Wafar, Mohideen</creatorcontrib><creatorcontrib>L’Helguen, Stéphane</creatorcontrib><creatorcontrib>Raikar, Varsha</creatorcontrib><creatorcontrib>Maguer, Jean-François</creatorcontrib><creatorcontrib>Corre, Pierre Le</creatorcontrib><title>Nitrogen uptake by size-fractionated plankton in permanently well-mixed temperate coastal waters</title><title>Journal of plankton research</title><addtitle>J. Plankton Res</addtitle><description>Nitrogen uptake by net- (15–200 μm), nano- (1–15 μm) and picoplankton (<1 μm) was measured over seasonal cycles at two stations with different patterns of biological and chemical cycles in the Morlaix Bay (western English Channel). Though assimilable dissolved N nutrient pool at both stations was nitrate-dominated, characteristics of biomass and N uptake by netplankton differed from conventional patterns in two respects. In the first, biomass (26–30%) and N uptake (36–43%) were less important than those of nanoplankton. In the second, the netplankton did not show any marked preference for nitrate over ammonium (nitrate to ammonium uptake ratios of 0.98 and 1.08). In contrast, nanoplankton had a preference for ammonium over nitrate (ammonium to nitrate uptake ratios of 2 and 1.2). N uptake by picoplankton was only 8% of total N uptake at both stations and was supported mainly by regenerated N (66% ammonium and 17% urea), with nitrate uptake detectable in only one instance and nitrite uptake in none. Substrate-dependent uptake of ammonium in all fractions and a higher ammonium uptake in the nanoplankton fraction in summer at both stations when ambient ammonium concentrations were high indicated that while nitrate may satisfy a part of N requirements, availability of ammonium and its flux through nanoplankton determine the magnitude of total N uptake in these waters. Most of the N uptake in picoplankton appears to be autotrophic, suggesting that a substantial part of heterotrophic uptake, if any, could be localized in the fractions >1 μm, and mediated by free-living and particle-bound bacteria.</description><subject>Ammonium</subject><subject>Ammonium compounds</subject><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Bacteria</subject><subject>Biological and medical sciences</subject><subject>Biomass</subject><subject>Chemical cycles</subject><subject>Coastal waters</subject><subject>Cycles</subject><subject>Earth Sciences</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Marine</subject><subject>Nannoplankton</subject><subject>Nitrates</subject><subject>Oceanography</subject><subject>Picoplankton</subject><subject>Plankton</subject><subject>Ratios</subject><subject>Sciences of the Universe</subject><subject>Sea water ecosystems</subject><subject>Synecology</subject><subject>Uptake</subject><subject>Urea</subject><issn>0142-7873</issn><issn>1464-3774</issn><issn>1464-3774</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNpdkd1rFDEUxYNYcG376HsQFHwYm0y-dh_Loq64rCAKxZd4N5PYdGeSaZK1Xf96s0xpwZeE3PPLuZx7EXpFyXtKFuxi7CHsyoXbXlNKnqEZ5ZI3TCn-HM0I5W2j5oq9QC9zviGEyqrO0K-NLyn-tgHvxwI7i7cHnP1f27gEpvgYoNgOT84xYB_waNMAwYbSH_Cd7ftm8PcVKXaoSqWxiZAL9PiuPlI-QycO-mzPH-5T9OPjh-_LVbP--unz8nLdGEFIaaRppXWdWlDlBDGmA2ek6Mz8WDACLJ93RLWd6OjW1ZO4lnEBBiTjhok5O0XvJt9r6PWY_ADpoCN4vbpc62ONtIwKqvgfWtm3EzumeLu3uejBZ1Oz1Fxxn3WlmFBUVPD1f-BN3KdQc-i2Ja3kCyYr1EyQSTHnZN1je0r0cTF6Gp-eFlP5Nw-mkA30ddDB-Pz0SVIpCWNPvj4Xe_-oQ9ppqZgSenX1U2_UcvllIxb6G_sHF1ugdA</recordid><startdate>20041001</startdate><enddate>20041001</enddate><creator>Wafar, Mohideen</creator><creator>L’Helguen, Stéphane</creator><creator>Raikar, Varsha</creator><creator>Maguer, Jean-François</creator><creator>Corre, Pierre Le</creator><general>Oxford University Press</general><general>Oxford Publishing Limited (England)</general><general>Oxford University Press (OUP)</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7SN</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope><scope>M7N</scope><scope>7TN</scope><scope>H96</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0003-3069-2821</orcidid><orcidid>https://orcid.org/0000-0002-2395-606X</orcidid></search><sort><creationdate>20041001</creationdate><title>Nitrogen uptake by size-fractionated plankton in permanently well-mixed temperate coastal waters</title><author>Wafar, Mohideen ; L’Helguen, Stéphane ; Raikar, Varsha ; Maguer, Jean-François ; Corre, Pierre Le</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c500t-6c26efd7917f50ccdafc65dc8917fc5ae48d072d5d1bfd5d0f2345aca634c3583</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Ammonium</topic><topic>Ammonium compounds</topic><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>Bacteria</topic><topic>Biological and medical sciences</topic><topic>Biomass</topic><topic>Chemical cycles</topic><topic>Coastal waters</topic><topic>Cycles</topic><topic>Earth Sciences</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Marine</topic><topic>Nannoplankton</topic><topic>Nitrates</topic><topic>Oceanography</topic><topic>Picoplankton</topic><topic>Plankton</topic><topic>Ratios</topic><topic>Sciences of the Universe</topic><topic>Sea water ecosystems</topic><topic>Synecology</topic><topic>Uptake</topic><topic>Urea</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wafar, Mohideen</creatorcontrib><creatorcontrib>L’Helguen, Stéphane</creatorcontrib><creatorcontrib>Raikar, Varsha</creatorcontrib><creatorcontrib>Maguer, Jean-François</creatorcontrib><creatorcontrib>Corre, Pierre Le</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Ecology Abstracts</collection><collection>Environmental Sciences and Pollution Management</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) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Oceanic Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Journal of plankton research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wafar, Mohideen</au><au>L’Helguen, Stéphane</au><au>Raikar, Varsha</au><au>Maguer, Jean-François</au><au>Corre, Pierre Le</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nitrogen uptake by size-fractionated plankton in permanently well-mixed temperate coastal waters</atitle><jtitle>Journal of plankton research</jtitle><addtitle>J. Plankton Res</addtitle><date>2004-10-01</date><risdate>2004</risdate><volume>26</volume><issue>10</issue><spage>1207</spage><epage>1218</epage><pages>1207-1218</pages><issn>0142-7873</issn><issn>1464-3774</issn><eissn>1464-3774</eissn><coden>JPLRD9</coden><abstract>Nitrogen uptake by net- (15–200 μm), nano- (1–15 μm) and picoplankton (<1 μm) was measured over seasonal cycles at two stations with different patterns of biological and chemical cycles in the Morlaix Bay (western English Channel). Though assimilable dissolved N nutrient pool at both stations was nitrate-dominated, characteristics of biomass and N uptake by netplankton differed from conventional patterns in two respects. In the first, biomass (26–30%) and N uptake (36–43%) were less important than those of nanoplankton. In the second, the netplankton did not show any marked preference for nitrate over ammonium (nitrate to ammonium uptake ratios of 0.98 and 1.08). In contrast, nanoplankton had a preference for ammonium over nitrate (ammonium to nitrate uptake ratios of 2 and 1.2). N uptake by picoplankton was only 8% of total N uptake at both stations and was supported mainly by regenerated N (66% ammonium and 17% urea), with nitrate uptake detectable in only one instance and nitrite uptake in none. Substrate-dependent uptake of ammonium in all fractions and a higher ammonium uptake in the nanoplankton fraction in summer at both stations when ambient ammonium concentrations were high indicated that while nitrate may satisfy a part of N requirements, availability of ammonium and its flux through nanoplankton determine the magnitude of total N uptake in these waters. 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| ispartof | Journal of plankton research, 2004-10, Vol.26 (10), p.1207-1218 |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Oxford University Press Journals All Titles (1996-Current) |
| subjects | Ammonium Ammonium compounds Animal and plant ecology Animal, plant and microbial ecology Bacteria Biological and medical sciences Biomass Chemical cycles Coastal waters Cycles Earth Sciences Fundamental and applied biological sciences. Psychology Marine Nannoplankton Nitrates Oceanography Picoplankton Plankton Ratios Sciences of the Universe Sea water ecosystems Synecology Uptake Urea |
| title | Nitrogen uptake by size-fractionated plankton in permanently well-mixed temperate coastal waters |
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