Use of lipids and their degradation products as biomarkers for carbon cycling in the northwestern Mediterranean Sea
Identifieur interne : 002E92 ( PascalFrancis/Corpus ); précédent : 002E91; suivant : 002E93Use of lipids and their degradation products as biomarkers for carbon cycling in the northwestern Mediterranean Sea
Auteurs : Stéphane Christodoulou ; Jean-Claude Marty ; Juan-Carlos Miquel ; John K. Volkman ; Jean-Francois RontaniSource :
- Marine chemistry [ 0304-4203 ] ; 2009.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Changes in phytoplankton composition and degradation of particulate organic matter (POM) in the northwestern Mediterranean Sea were studied using time-series sediment trap samples collected during the spring of 2003 at the DYFAMED station. Lipid biomarkers (pigments, fatty acids, sterols, acyclic isoprenoids, alkenones and n-alkanols) were used to identify the main contributors to the POM produced during two phytoplankton blooms, while the effects of photooxidation, autoxidation and biodegradation were differentiated using characteristic lipid degradation products. Traps collected material corresponding to pre-bloom, bloom and post-bloom periods. Pigment analyses in the integrated (0-200 m) water column samples indicated that diatoms dominated the initial stages of the bloom event, with smaller amounts of haptophytes and pelagophytes. During the second part of bloom event there was a switch to haptophyte dominance with significant contributions from diatoms and pelagophytes, and an increased contribution from cryptophytes. Fatty acid distributions in the trap samples reflected contributions from marine bacteria, phytoplankton and zooplankton. Photooxidation and autoxidation products of monounsaturated oleic, cis-vaccenic and palmitoleic acids were detected along with photooxidation products from the chlorophyll side-chain. The relatively good correlation between the variation of UK'37 index and specific phytol autoxidation product percentage allowed us to attribute the alterations of UK'37 observed during the pre-bloom period and in the deeper traps to the involvement of selective autoxidative degradation processes. A variety of sterol oxidation products formed by biohydrogenation, autoxidation and photooxidation were detected. Sterol degradation products appeared to be less suited than oxidation products of monounsaturated fatty acids for the precise monitoring of the degradation state of POM, but their stable functionalized cyclic structure constitutes a useful tool to estimate the part played by biotic and abiotic processes. In these waters, biotic degradation generally predominates, but abiotic degradation is not negligible and, as expected, the extent of biotic degradation increases with depth. To obtain a more complete picture of POM degradation, the use of a pool of lipid degradation products (i.e. from unsaturated fatty acids, the phytyl side-chain and sterols) should be employed.
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Format Inist (serveur)
NO : | PASCAL 09-0160100 INIST |
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ET : | Use of lipids and their degradation products as biomarkers for carbon cycling in the northwestern Mediterranean Sea |
AU : | CHRISTODOULOU (Stéphane); MARTY (Jean-Claude); MIQUEL (Juan-Carlos); VOLKMAN (John K.); RONTANI (Jean-Francois) |
AF : | Laboratoire de Microbiologie, Géochimie et Ecologie Marines (UMR 6117), Centre d'Océanologie de Marseille (OSU), Campus de Luminy-case 901/13288 Marseille/France (1 aut., 5 aut.); CNRS, UMR7093, Laboratoire d'Océanographie de Villefranche/06230 Villefranche-sur-Mer/France (2 aut.); Université Pierre et Marie Curie-Paris 6, Laboratoire d'Océanographie de Villefranche/06230 Villefranche-sur-Mer/France (2 aut.); IAEA Marine Environment Laboratories, 4 Quai Antoine 1er/98000/Monaco (3 aut.); CSIRO Marine and Atmospheric Research and Wealth from Océans National Research Flagship, CPO Box 1538/Hobart, 7001/Australie (4 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Marine chemistry; ISSN 0304-4203; Coden MRCHBD; Pays-Bas; Da. 2009; Vol. 113; No. 1-2; Pp. 25-40; Bibl. 1 p.1/2 |
LA : | Anglais |
EA : | Changes in phytoplankton composition and degradation of particulate organic matter (POM) in the northwestern Mediterranean Sea were studied using time-series sediment trap samples collected during the spring of 2003 at the DYFAMED station. Lipid biomarkers (pigments, fatty acids, sterols, acyclic isoprenoids, alkenones and n-alkanols) were used to identify the main contributors to the POM produced during two phytoplankton blooms, while the effects of photooxidation, autoxidation and biodegradation were differentiated using characteristic lipid degradation products. Traps collected material corresponding to pre-bloom, bloom and post-bloom periods. Pigment analyses in the integrated (0-200 m) water column samples indicated that diatoms dominated the initial stages of the bloom event, with smaller amounts of haptophytes and pelagophytes. During the second part of bloom event there was a switch to haptophyte dominance with significant contributions from diatoms and pelagophytes, and an increased contribution from cryptophytes. Fatty acid distributions in the trap samples reflected contributions from marine bacteria, phytoplankton and zooplankton. Photooxidation and autoxidation products of monounsaturated oleic, cis-vaccenic and palmitoleic acids were detected along with photooxidation products from the chlorophyll side-chain. The relatively good correlation between the variation of UK'37 index and specific phytol autoxidation product percentage allowed us to attribute the alterations of UK'37 observed during the pre-bloom period and in the deeper traps to the involvement of selective autoxidative degradation processes. A variety of sterol oxidation products formed by biohydrogenation, autoxidation and photooxidation were detected. Sterol degradation products appeared to be less suited than oxidation products of monounsaturated fatty acids for the precise monitoring of the degradation state of POM, but their stable functionalized cyclic structure constitutes a useful tool to estimate the part played by biotic and abiotic processes. In these waters, biotic degradation generally predominates, but abiotic degradation is not negligible and, as expected, the extent of biotic degradation increases with depth. To obtain a more complete picture of POM degradation, the use of a pool of lipid degradation products (i.e. from unsaturated fatty acids, the phytyl side-chain and sterols) should be employed. |
CC : | 001E02B01; 001E01B02; 220B02 |
FD : | Lipide; Dégradation; Biomarqueur; Carbone; Mer Méditerranée; Matière organique; Piège sédiment; Source; Pigment; Acide gras; Stérol; Isoprénoïde; Alcénone; Biodégradation; Matériau; Chlorophylle; Corrélation; Altération; Oxydation; Profondeur; Traceur; Hydrochimie; Eau mer; Royaume Uni |
FG : | Europe Ouest; Europe |
ED : | lipids; degradation; biomarkers; carbon; Mediterranean Sea; organic materials; sediment traps; springs; pigments; fatty acids; sterols; isoprenoids; alkenone; biodegradation; materials; chlorophyll; correlation; alteration; oxidation; depth; tracers; hydrochemistry; sea water; United Kingdom |
EG : | Western Europe; Europe |
SD : | Lípido; Bioindicator; Carbono; Mar Mediterráneo; Materia orgánica; Fuente; Pigmento; Acido graso; Esterol; Isoprenoide; Biodegradación; Clorofila; Correlación; Alteración; Oxidación; Profundidad; Trazador; Hidroquímica; Agua mar; Reino Unido |
LO : | INIST-15979.354000187051120040 |
ID : | 09-0160100 |
Links to Exploration step
Pascal:09-0160100Le document en format XML
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<front><div type="abstract" xml:lang="en">Changes in phytoplankton composition and degradation of particulate organic matter (POM) in the northwestern Mediterranean Sea were studied using time-series sediment trap samples collected during the spring of 2003 at the DYFAMED station. Lipid biomarkers (pigments, fatty acids, sterols, acyclic isoprenoids, alkenones and n-alkanols) were used to identify the main contributors to the POM produced during two phytoplankton blooms, while the effects of photooxidation, autoxidation and biodegradation were differentiated using characteristic lipid degradation products. Traps collected material corresponding to pre-bloom, bloom and post-bloom periods. Pigment analyses in the integrated (0-200 m) water column samples indicated that diatoms dominated the initial stages of the bloom event, with smaller amounts of haptophytes and pelagophytes. During the second part of bloom event there was a switch to haptophyte dominance with significant contributions from diatoms and pelagophytes, and an increased contribution from cryptophytes. Fatty acid distributions in the trap samples reflected contributions from marine bacteria, phytoplankton and zooplankton. Photooxidation and autoxidation products of monounsaturated oleic, cis-vaccenic and palmitoleic acids were detected along with photooxidation products from the chlorophyll side-chain. The relatively good correlation between the variation of U<sup>K'</sup>
<sub>37</sub>
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<sub>37</sub>
observed during the pre-bloom period and in the deeper traps to the involvement of selective autoxidative degradation processes. A variety of sterol oxidation products formed by biohydrogenation, autoxidation and photooxidation were detected. Sterol degradation products appeared to be less suited than oxidation products of monounsaturated fatty acids for the precise monitoring of the degradation state of POM, but their stable functionalized cyclic structure constitutes a useful tool to estimate the part played by biotic and abiotic processes. In these waters, biotic degradation generally predominates, but abiotic degradation is not negligible and, as expected, the extent of biotic degradation increases with depth. To obtain a more complete picture of POM degradation, the use of a pool of lipid degradation products (i.e. from unsaturated fatty acids, the phytyl side-chain and sterols) should be employed.</div>
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<fC01 i1="01" l="ENG"><s0>Changes in phytoplankton composition and degradation of particulate organic matter (POM) in the northwestern Mediterranean Sea were studied using time-series sediment trap samples collected during the spring of 2003 at the DYFAMED station. Lipid biomarkers (pigments, fatty acids, sterols, acyclic isoprenoids, alkenones and n-alkanols) were used to identify the main contributors to the POM produced during two phytoplankton blooms, while the effects of photooxidation, autoxidation and biodegradation were differentiated using characteristic lipid degradation products. Traps collected material corresponding to pre-bloom, bloom and post-bloom periods. Pigment analyses in the integrated (0-200 m) water column samples indicated that diatoms dominated the initial stages of the bloom event, with smaller amounts of haptophytes and pelagophytes. During the second part of bloom event there was a switch to haptophyte dominance with significant contributions from diatoms and pelagophytes, and an increased contribution from cryptophytes. Fatty acid distributions in the trap samples reflected contributions from marine bacteria, phytoplankton and zooplankton. Photooxidation and autoxidation products of monounsaturated oleic, cis-vaccenic and palmitoleic acids were detected along with photooxidation products from the chlorophyll side-chain. The relatively good correlation between the variation of U<sup>K'</sup>
<sub>37</sub>
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<sub>37</sub>
observed during the pre-bloom period and in the deeper traps to the involvement of selective autoxidative degradation processes. A variety of sterol oxidation products formed by biohydrogenation, autoxidation and photooxidation were detected. Sterol degradation products appeared to be less suited than oxidation products of monounsaturated fatty acids for the precise monitoring of the degradation state of POM, but their stable functionalized cyclic structure constitutes a useful tool to estimate the part played by biotic and abiotic processes. In these waters, biotic degradation generally predominates, but abiotic degradation is not negligible and, as expected, the extent of biotic degradation increases with depth. To obtain a more complete picture of POM degradation, the use of a pool of lipid degradation products (i.e. from unsaturated fatty acids, the phytyl side-chain and sterols) should be employed.</s0>
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<s5>06</s5>
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<fC03 i1="06" i2="2" l="ENG"><s0>organic materials</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="2" l="SPA"><s0>Materia orgánica</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="2" l="FRE"><s0>Piège sédiment</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="2" l="ENG"><s0>sediment traps</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="2" l="FRE"><s0>Source</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="2" l="ENG"><s0>springs</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="2" l="SPA"><s0>Fuente</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="2" l="FRE"><s0>Pigment</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="2" l="ENG"><s0>pigments</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="2" l="SPA"><s0>Pigmento</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="2" l="FRE"><s0>Acide gras</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="2" l="ENG"><s0>fatty acids</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="2" l="SPA"><s0>Acido graso</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="2" l="FRE"><s0>Stérol</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="2" l="ENG"><s0>sterols</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="2" l="SPA"><s0>Esterol</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="2" l="FRE"><s0>Isoprénoïde</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="2" l="ENG"><s0>isoprenoids</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="2" l="SPA"><s0>Isoprenoide</s0>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="2" l="FRE"><s0>Alcénone</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="2" l="ENG"><s0>alkenone</s0>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="2" l="FRE"><s0>Biodégradation</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="2" l="ENG"><s0>biodegradation</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="2" l="SPA"><s0>Biodegradación</s0>
<s5>14</s5>
</fC03>
<fC03 i1="15" i2="2" l="FRE"><s0>Matériau</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="2" l="ENG"><s0>materials</s0>
<s5>15</s5>
</fC03>
<fC03 i1="16" i2="2" l="FRE"><s0>Chlorophylle</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="2" l="ENG"><s0>chlorophyll</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="2" l="SPA"><s0>Clorofila</s0>
<s5>16</s5>
</fC03>
<fC03 i1="17" i2="2" l="FRE"><s0>Corrélation</s0>
<s5>17</s5>
</fC03>
<fC03 i1="17" i2="2" l="ENG"><s0>correlation</s0>
<s5>17</s5>
</fC03>
<fC03 i1="17" i2="2" l="SPA"><s0>Correlación</s0>
<s5>17</s5>
</fC03>
<fC03 i1="18" i2="2" l="FRE"><s0>Altération</s0>
<s5>18</s5>
</fC03>
<fC03 i1="18" i2="2" l="ENG"><s0>alteration</s0>
<s5>18</s5>
</fC03>
<fC03 i1="18" i2="2" l="SPA"><s0>Alteración</s0>
<s5>18</s5>
</fC03>
<fC03 i1="19" i2="2" l="FRE"><s0>Oxydation</s0>
<s5>19</s5>
</fC03>
<fC03 i1="19" i2="2" l="ENG"><s0>oxidation</s0>
<s5>19</s5>
</fC03>
<fC03 i1="19" i2="2" l="SPA"><s0>Oxidación</s0>
<s5>19</s5>
</fC03>
<fC03 i1="20" i2="2" l="FRE"><s0>Profondeur</s0>
<s5>20</s5>
</fC03>
<fC03 i1="20" i2="2" l="ENG"><s0>depth</s0>
<s5>20</s5>
</fC03>
<fC03 i1="20" i2="2" l="SPA"><s0>Profundidad</s0>
<s5>20</s5>
</fC03>
<fC03 i1="21" i2="2" l="FRE"><s0>Traceur</s0>
<s5>21</s5>
</fC03>
<fC03 i1="21" i2="2" l="ENG"><s0>tracers</s0>
<s5>21</s5>
</fC03>
<fC03 i1="21" i2="2" l="SPA"><s0>Trazador</s0>
<s5>21</s5>
</fC03>
<fC03 i1="22" i2="2" l="FRE"><s0>Hydrochimie</s0>
<s5>22</s5>
</fC03>
<fC03 i1="22" i2="2" l="ENG"><s0>hydrochemistry</s0>
<s5>22</s5>
</fC03>
<fC03 i1="22" i2="2" l="SPA"><s0>Hidroquímica</s0>
<s5>22</s5>
</fC03>
<fC03 i1="23" i2="2" l="FRE"><s0>Eau mer</s0>
<s5>23</s5>
</fC03>
<fC03 i1="23" i2="2" l="ENG"><s0>sea water</s0>
<s5>23</s5>
</fC03>
<fC03 i1="23" i2="2" l="SPA"><s0>Agua mar</s0>
<s5>23</s5>
</fC03>
<fC03 i1="24" i2="2" l="FRE"><s0>Royaume Uni</s0>
<s2>NG</s2>
<s5>61</s5>
</fC03>
<fC03 i1="24" i2="2" l="ENG"><s0>United Kingdom</s0>
<s2>NG</s2>
<s5>61</s5>
</fC03>
<fC03 i1="24" i2="2" l="SPA"><s0>Reino Unido</s0>
<s2>NG</s2>
<s5>61</s5>
</fC03>
<fC07 i1="01" i2="2" l="FRE"><s0>Europe Ouest</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="01" i2="2" l="ENG"><s0>Western Europe</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="01" i2="2" l="SPA"><s0>Europa del Oeste</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="02" i2="2" l="FRE"><s0>Europe</s0>
<s2>564</s2>
</fC07>
<fC07 i1="02" i2="2" l="ENG"><s0>Europe</s0>
<s2>564</s2>
</fC07>
<fC07 i1="02" i2="2" l="SPA"><s0>Europa</s0>
<s2>564</s2>
</fC07>
<fN21><s1>117</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 09-0160100 INIST</NO>
<ET>Use of lipids and their degradation products as biomarkers for carbon cycling in the northwestern Mediterranean Sea</ET>
<AU>CHRISTODOULOU (Stéphane); MARTY (Jean-Claude); MIQUEL (Juan-Carlos); VOLKMAN (John K.); RONTANI (Jean-Francois)</AU>
<AF>Laboratoire de Microbiologie, Géochimie et Ecologie Marines (UMR 6117), Centre d'Océanologie de Marseille (OSU), Campus de Luminy-case 901/13288 Marseille/France (1 aut., 5 aut.); CNRS, UMR7093, Laboratoire d'Océanographie de Villefranche/06230 Villefranche-sur-Mer/France (2 aut.); Université Pierre et Marie Curie-Paris 6, Laboratoire d'Océanographie de Villefranche/06230 Villefranche-sur-Mer/France (2 aut.); IAEA Marine Environment Laboratories, 4 Quai Antoine 1er/98000/Monaco (3 aut.); CSIRO Marine and Atmospheric Research and Wealth from Océans National Research Flagship, CPO Box 1538/Hobart, 7001/Australie (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Marine chemistry; ISSN 0304-4203; Coden MRCHBD; Pays-Bas; Da. 2009; Vol. 113; No. 1-2; Pp. 25-40; Bibl. 1 p.1/2</SO>
<LA>Anglais</LA>
<EA>Changes in phytoplankton composition and degradation of particulate organic matter (POM) in the northwestern Mediterranean Sea were studied using time-series sediment trap samples collected during the spring of 2003 at the DYFAMED station. Lipid biomarkers (pigments, fatty acids, sterols, acyclic isoprenoids, alkenones and n-alkanols) were used to identify the main contributors to the POM produced during two phytoplankton blooms, while the effects of photooxidation, autoxidation and biodegradation were differentiated using characteristic lipid degradation products. Traps collected material corresponding to pre-bloom, bloom and post-bloom periods. Pigment analyses in the integrated (0-200 m) water column samples indicated that diatoms dominated the initial stages of the bloom event, with smaller amounts of haptophytes and pelagophytes. During the second part of bloom event there was a switch to haptophyte dominance with significant contributions from diatoms and pelagophytes, and an increased contribution from cryptophytes. Fatty acid distributions in the trap samples reflected contributions from marine bacteria, phytoplankton and zooplankton. Photooxidation and autoxidation products of monounsaturated oleic, cis-vaccenic and palmitoleic acids were detected along with photooxidation products from the chlorophyll side-chain. The relatively good correlation between the variation of U<sup>K'</sup>
<sub>37</sub>
index and specific phytol autoxidation product percentage allowed us to attribute the alterations of U<sup>K'</sup>
<sub>37</sub>
observed during the pre-bloom period and in the deeper traps to the involvement of selective autoxidative degradation processes. A variety of sterol oxidation products formed by biohydrogenation, autoxidation and photooxidation were detected. Sterol degradation products appeared to be less suited than oxidation products of monounsaturated fatty acids for the precise monitoring of the degradation state of POM, but their stable functionalized cyclic structure constitutes a useful tool to estimate the part played by biotic and abiotic processes. In these waters, biotic degradation generally predominates, but abiotic degradation is not negligible and, as expected, the extent of biotic degradation increases with depth. To obtain a more complete picture of POM degradation, the use of a pool of lipid degradation products (i.e. from unsaturated fatty acids, the phytyl side-chain and sterols) should be employed.</EA>
<CC>001E02B01; 001E01B02; 220B02</CC>
<FD>Lipide; Dégradation; Biomarqueur; Carbone; Mer Méditerranée; Matière organique; Piège sédiment; Source; Pigment; Acide gras; Stérol; Isoprénoïde; Alcénone; Biodégradation; Matériau; Chlorophylle; Corrélation; Altération; Oxydation; Profondeur; Traceur; Hydrochimie; Eau mer; Royaume Uni</FD>
<FG>Europe Ouest; Europe</FG>
<ED>lipids; degradation; biomarkers; carbon; Mediterranean Sea; organic materials; sediment traps; springs; pigments; fatty acids; sterols; isoprenoids; alkenone; biodegradation; materials; chlorophyll; correlation; alteration; oxidation; depth; tracers; hydrochemistry; sea water; United Kingdom</ED>
<EG>Western Europe; Europe</EG>
<SD>Lípido; Bioindicator; Carbono; Mar Mediterráneo; Materia orgánica; Fuente; Pigmento; Acido graso; Esterol; Isoprenoide; Biodegradación; Clorofila; Correlación; Alteración; Oxidación; Profundidad; Trazador; Hidroquímica; Agua mar; Reino Unido</SD>
<LO>INIST-15979.354000187051120040</LO>
<ID>09-0160100</ID>
</server>
</inist>
</record>
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