Free Amino Acids in Lakes: Concentrations and Assimilation Rates in Relation to Phytoplankton and Bacterial Production
Diel changes of concentrations and assimilation rates of dissolved free amino acids (DFAA) were followed every third day during periods of 3-5 weeks in eutrophic Frederiksborg Slotsso and Lake Hylke and oligotrophic Lake Almind. Concentrations of DFAA varied from 78 to 3,672 nM, but most concentrati...
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| Veröffentlicht in: | Limnology and oceanography 1987-01, Vol.32 (1), p.97-111 |
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| container_title | Limnology and oceanography |
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| creator | Jorgensen, NOG |
| description | Diel changes of concentrations and assimilation rates of dissolved free amino acids (DFAA) were followed every third day during periods of 3-5 weeks in eutrophic Frederiksborg Slotsso and Lake Hylke and oligotrophic Lake Almind. Concentrations of DFAA varied from 78 to 3,672 nM, but most concentrations were between 200 and 1,600 nM. Diel variations of DFAA ranged from |
| doi_str_mv | 10.4319/lo.1987.32.1.0097 |
| format | Article |
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Concentrations of DFAA varied from 78 to 3,672 nM, but most concentrations were between 200 and 1,600 nM. Diel variations of DFAA ranged from <10%, but were occasionally 500%. In Fr. Slotsso, concentrations were maximal in the morning and minimal at noon. The high morning concentrations coincided with the diel minimum bacterial production. In Lake Hylke mean concentrations were measured at noon, but in Lake Almind no diel trends were obvious. Statistical analyses demonstrate that long-term changes of the DFAA pools in the lakes were negatively correlated with both primary production (except Lake Almind) and bacterial production. In Fr. Slotsso and Lake Hylke, assimilation of DFAA (based on assimilation of five abundant DFAA) did not demostrate diel trends, but within the study periods, the mean diel assimilation rates correlated negatively with primary production. In Lake Almind, no tendencies in the DFAA assimilation rates were observed. Carbon flux of DFAA assimilation in the lakes on the average made up from 6.9 to 11.3% of the primary production, and from 28.5 to 93.1% of the bacterial production, determined with the [3H]thymidine incorporation procedure. Data from the two eutrophic lakes suggest that degradation of phytoplankton can be a major source of DFAA in lakes.</description><identifier>ISSN: 0024-3590</identifier><identifier>EISSN: 1939-5590</identifier><identifier>DOI: 10.4319/lo.1987.32.1.0097</identifier><identifier>CODEN: LIOCAH</identifier><language>eng</language><publisher>Waco, TX: American Society of Limnology and Oceanography</publisher><subject>Amino acids ; Animal and plant ecology ; Animal, plant and microbial ecology ; Bacteria ; Biological and medical sciences ; Carbon ; Fresh water ecosystems ; Freshwater ; Fundamental and applied biological sciences. Psychology ; Lakes ; Phytoplankton ; Primary productivity ; Radiocarbon ; Respiration ; Synecology ; Water samples ; Zooplankton</subject><ispartof>Limnology and oceanography, 1987-01, Vol.32 (1), p.97-111</ispartof><rights>Copyright 1987 American Society of Limnology and Oceanography, Inc.</rights><rights>1988 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/2836898$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/2836898$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,4009,27902,27903,27904,57995,58228</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7417207$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Jorgensen, NOG</creatorcontrib><title>Free Amino Acids in Lakes: Concentrations and Assimilation Rates in Relation to Phytoplankton and Bacterial Production</title><title>Limnology and oceanography</title><description>Diel changes of concentrations and assimilation rates of dissolved free amino acids (DFAA) were followed every third day during periods of 3-5 weeks in eutrophic Frederiksborg Slotsso and Lake Hylke and oligotrophic Lake Almind. Concentrations of DFAA varied from 78 to 3,672 nM, but most concentrations were between 200 and 1,600 nM. Diel variations of DFAA ranged from <10%, but were occasionally 500%. In Fr. Slotsso, concentrations were maximal in the morning and minimal at noon. The high morning concentrations coincided with the diel minimum bacterial production. In Lake Hylke mean concentrations were measured at noon, but in Lake Almind no diel trends were obvious. Statistical analyses demonstrate that long-term changes of the DFAA pools in the lakes were negatively correlated with both primary production (except Lake Almind) and bacterial production. In Fr. Slotsso and Lake Hylke, assimilation of DFAA (based on assimilation of five abundant DFAA) did not demostrate diel trends, but within the study periods, the mean diel assimilation rates correlated negatively with primary production. In Lake Almind, no tendencies in the DFAA assimilation rates were observed. Carbon flux of DFAA assimilation in the lakes on the average made up from 6.9 to 11.3% of the primary production, and from 28.5 to 93.1% of the bacterial production, determined with the [3H]thymidine incorporation procedure. Data from the two eutrophic lakes suggest that degradation of phytoplankton can be a major source of DFAA in lakes.</description><subject>Amino acids</subject><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Bacteria</subject><subject>Biological and medical sciences</subject><subject>Carbon</subject><subject>Fresh water ecosystems</subject><subject>Freshwater</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Lakes</subject><subject>Phytoplankton</subject><subject>Primary productivity</subject><subject>Radiocarbon</subject><subject>Respiration</subject><subject>Synecology</subject><subject>Water samples</subject><subject>Zooplankton</subject><issn>0024-3590</issn><issn>1939-5590</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1987</creationdate><recordtype>article</recordtype><recordid>eNqF0M9LwzAUB_AgCs7pHyB4yEG8tSbNr8ZbHU6FgWPouWRJitnaZiaZsP_ezg2vnvL4vs97PALANUY5JVjetz7HshQ5KXKcIyTFCRhhSWTGmESnYIRQQTMy1OfgIsYVGghjbAS-p8FaWHWu97DSzkToejhTaxsf4MT32vYpqOR8H6HqDaxidJ1rfxO4UMn--oU9JsnD-ecu-U2r-nUagv3Mo9LJBqdaOA_ebPVeXoKzRrXRXh3fMfiYPr1PXrLZ2_PrpJplq4KzlBFJOV8ayYgxVIjSWFsKzqVYYm6o5Y3QHBNTMMlQ01jCqMElEphhLUihDRmDu8PeTfBfWxtT3bmobTvcZ_021phzWgxf9D8kJcKU4gHeHqGKWrVNUL12sd4E16mwqwXFokBiYDcHtorJh792URJeypL8AHctg4o</recordid><startdate>19870101</startdate><enddate>19870101</enddate><creator>Jorgensen, NOG</creator><general>American Society of Limnology and Oceanography</general><scope>IQODW</scope><scope>7QH</scope><scope>F1W</scope><scope>H95</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>19870101</creationdate><title>Free Amino Acids in Lakes: Concentrations and Assimilation Rates in Relation to Phytoplankton and Bacterial Production</title><author>Jorgensen, NOG</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-j265t-39466bd953dd4778dee876697b16d4e6f7c613d25950ffe354d1807151c732cd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1987</creationdate><topic>Amino acids</topic><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>Bacteria</topic><topic>Biological and medical sciences</topic><topic>Carbon</topic><topic>Fresh water ecosystems</topic><topic>Freshwater</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Lakes</topic><topic>Phytoplankton</topic><topic>Primary productivity</topic><topic>Radiocarbon</topic><topic>Respiration</topic><topic>Synecology</topic><topic>Water samples</topic><topic>Zooplankton</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jorgensen, NOG</creatorcontrib><collection>Pascal-Francis</collection><collection>Aqualine</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>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Limnology and oceanography</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jorgensen, NOG</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Free Amino Acids in Lakes: Concentrations and Assimilation Rates in Relation to Phytoplankton and Bacterial Production</atitle><jtitle>Limnology and oceanography</jtitle><date>1987-01-01</date><risdate>1987</risdate><volume>32</volume><issue>1</issue><spage>97</spage><epage>111</epage><pages>97-111</pages><issn>0024-3590</issn><eissn>1939-5590</eissn><coden>LIOCAH</coden><abstract>Diel changes of concentrations and assimilation rates of dissolved free amino acids (DFAA) were followed every third day during periods of 3-5 weeks in eutrophic Frederiksborg Slotsso and Lake Hylke and oligotrophic Lake Almind. Concentrations of DFAA varied from 78 to 3,672 nM, but most concentrations were between 200 and 1,600 nM. Diel variations of DFAA ranged from <10%, but were occasionally 500%. In Fr. Slotsso, concentrations were maximal in the morning and minimal at noon. The high morning concentrations coincided with the diel minimum bacterial production. In Lake Hylke mean concentrations were measured at noon, but in Lake Almind no diel trends were obvious. Statistical analyses demonstrate that long-term changes of the DFAA pools in the lakes were negatively correlated with both primary production (except Lake Almind) and bacterial production. In Fr. Slotsso and Lake Hylke, assimilation of DFAA (based on assimilation of five abundant DFAA) did not demostrate diel trends, but within the study periods, the mean diel assimilation rates correlated negatively with primary production. In Lake Almind, no tendencies in the DFAA assimilation rates were observed. Carbon flux of DFAA assimilation in the lakes on the average made up from 6.9 to 11.3% of the primary production, and from 28.5 to 93.1% of the bacterial production, determined with the [3H]thymidine incorporation procedure. Data from the two eutrophic lakes suggest that degradation of phytoplankton can be a major source of DFAA in lakes.</abstract><cop>Waco, TX</cop><pub>American Society of Limnology and Oceanography</pub><doi>10.4319/lo.1987.32.1.0097</doi><tpages>15</tpages></addata></record> |
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| ispartof | Limnology and oceanography, 1987-01, Vol.32 (1), p.97-111 |
| issn | 0024-3590 1939-5590 |
| language | eng |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Jstor Complete Legacy; Alma/SFX Local Collection |
| subjects | Amino acids Animal and plant ecology Animal, plant and microbial ecology Bacteria Biological and medical sciences Carbon Fresh water ecosystems Freshwater Fundamental and applied biological sciences. Psychology Lakes Phytoplankton Primary productivity Radiocarbon Respiration Synecology Water samples Zooplankton |
| title | Free Amino Acids in Lakes: Concentrations and Assimilation Rates in Relation to Phytoplankton and Bacterial Production |
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