Metal distributions in Tigriopus brevicornis (Crustacea, Copepoda) exposed to copper, zinc, nickel, cadmium, silver, and mercury, and implication for subsequent transfer in the food web
Identifieur interne : 001050 ( Istex/Corpus ); précédent : 001049; suivant : 001051Metal distributions in Tigriopus brevicornis (Crustacea, Copepoda) exposed to copper, zinc, nickel, cadmium, silver, and mercury, and implication for subsequent transfer in the food web
Auteurs : Sabria Barka ; Jean-François Pavillon ; Claude Amiard-TriquetSource :
- Environmental Toxicology [ 1520-4081 ] ; 2010-08.
English descriptors
Abstract
The marine copepod Tigriopus brevicornis is a benthic microcrustacean inhabiting splashed rock pools in the intertidal zone. The genus has a worldwide distribution, and some species play an important role as a link in trophic webs. It is well established that many crustaceans are able to survive in contaminated environments by storing metallic pollutants in detoxified form, and thus, they may represent a source of contaminants for their predators. The present study was designed to determine the distribution of bioaccumulated metals, both essential and nonessential, with a view to assessing their availability to the next trophic level. Groups of 1000–1500 adult copepods were exposed for 1–14 days to Ag, Cd, Cu, Hg, Ni, and Zn in water. Three concentrations, chosen to be realistic in comparison with those encountered in polluted environments, were tested for each metal. Copepods were homogenized and metals were analyzed in supernatants (i.e., metals stored in soluble form in soft tissues or easily remobilized from the exoskeleton) and pellets (including metal‐rich detoxificatory granules or with cellular debris) recovered after centrifugation. Another experiment, consisting of desorption tests, was designed to evaluate the fraction of metals loosely bound onto the exoskeleton. The bioaccumulation ability is highly variable, as shown by the ratios between the concentrations reached in T. brevicornis experimentally exposed to different metals (at higher dose and at day 14) and those in controls (7, 12, 18, 26, 53, and 99, respectively, for Zn, Cu, Ni, Cd, Ag, and Hg). Cu, Zn, and Ni concentrations in copepods increased linearly with time over the whole range of exposure concentrations, whereas a plateau body metal concentration was reached with time particularly at the highest exposure concentrations for Cd, Ag, and Hg. Metals bound onto the exoskeleton were remobilized to different extents, the percentages of desorption being 11, 14, 16, 19, 31, and 32, respectively, for Zn, Cd, Cu, Ni, Ag, and Hg. Metals mainly present in the supernatant (Cd, Ni, Zn) are probably more able to be transferred along a food chain than those which were equally distributed between soluble and insoluble fractions (Ag, Cu, and Hg). © 2009 Wiley Periodicals, Inc. Environ Toxicol 25: 350–360, 2010.
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DOI: 10.1002/tox.20505
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ISTEX:E3A839290B34B43BE8C242B40DDBBF00C0FA526BLe document en format XML
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The genus has a worldwide distribution, and some species play an important role as a link in trophic webs. It is well established that many crustaceans are able to survive in contaminated environments by storing metallic pollutants in detoxified form, and thus, they may represent a source of contaminants for their predators. The present study was designed to determine the distribution of bioaccumulated metals, both essential and nonessential, with a view to assessing their availability to the next trophic level. Groups of 1000–1500 adult copepods were exposed for 1–14 days to Ag, Cd, Cu, Hg, Ni, and Zn in water. Three concentrations, chosen to be realistic in comparison with those encountered in polluted environments, were tested for each metal. Copepods were homogenized and metals were analyzed in supernatants (i.e., metals stored in soluble form in soft tissues or easily remobilized from the exoskeleton) and pellets (including metal‐rich detoxificatory granules or with cellular debris) recovered after centrifugation. Another experiment, consisting of desorption tests, was designed to evaluate the fraction of metals loosely bound onto the exoskeleton. The bioaccumulation ability is highly variable, as shown by the ratios between the concentrations reached in T. brevicornis experimentally exposed to different metals (at higher dose and at day 14) and those in controls (7, 12, 18, 26, 53, and 99, respectively, for Zn, Cu, Ni, Cd, Ag, and Hg). Cu, Zn, and Ni concentrations in copepods increased linearly with time over the whole range of exposure concentrations, whereas a plateau body metal concentration was reached with time particularly at the highest exposure concentrations for Cd, Ag, and Hg. Metals bound onto the exoskeleton were remobilized to different extents, the percentages of desorption being 11, 14, 16, 19, 31, and 32, respectively, for Zn, Cd, Cu, Ni, Ag, and Hg. Metals mainly present in the supernatant (Cd, Ni, Zn) are probably more able to be transferred along a food chain than those which were equally distributed between soluble and insoluble fractions (Ag, Cu, and Hg). © 2009 Wiley Periodicals, Inc. 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Copepods were homogenized and metals were analyzed in supernatants (i.e., metals stored in soluble form in soft tissues or easily remobilized from the exoskeleton) and pellets (including metal‐rich detoxificatory granules or with cellular debris) recovered after centrifugation. Another experiment, consisting of desorption tests, was designed to evaluate the fraction of metals loosely bound onto the exoskeleton. The bioaccumulation ability is highly variable, as shown by the ratios between the concentrations reached in T. brevicornis experimentally exposed to different metals (at higher dose and at day 14) and those in controls (7, 12, 18, 26, 53, and 99, respectively, for Zn, Cu, Ni, Cd, Ag, and Hg). Cu, Zn, and Ni concentrations in copepods increased linearly with time over the whole range of exposure concentrations, whereas a plateau body metal concentration was reached with time particularly at the highest exposure concentrations for Cd, Ag, and Hg. Metals bound onto the exoskeleton were remobilized to different extents, the percentages of desorption being 11, 14, 16, 19, 31, and 32, respectively, for Zn, Cd, Cu, Ni, Ag, and Hg. Metals mainly present in the supernatant (Cd, Ni, Zn) are probably more able to be transferred along a food chain than those which were equally distributed between soluble and insoluble fractions (Ag, Cu, and Hg). © 2009 Wiley Periodicals, Inc. 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Copepods were homogenized and metals were analyzed in supernatants (i.e., metals stored in soluble form in soft tissues or easily remobilized from the exoskeleton) and pellets (including metal‐rich detoxificatory granules or with cellular debris) recovered after centrifugation. Another experiment, consisting of desorption tests, was designed to evaluate the fraction of metals loosely bound onto the exoskeleton. The bioaccumulation ability is highly variable, as shown by the ratios between the concentrations reached in T. brevicornis experimentally exposed to different metals (at higher dose and at day 14) and those in controls (7, 12, 18, 26, 53, and 99, respectively, for Zn, Cu, Ni, Cd, Ag, and Hg). Cu, Zn, and Ni concentrations in copepods increased linearly with time over the whole range of exposure concentrations, whereas a plateau body metal concentration was reached with time particularly at the highest exposure concentrations for Cd, Ag, and Hg. Metals bound onto the exoskeleton were remobilized to different extents, the percentages of desorption being 11, 14, 16, 19, 31, and 32, respectively, for Zn, Cd, Cu, Ni, Ag, and Hg. Metals mainly present in the supernatant (Cd, Ni, Zn) are probably more able to be transferred along a food chain than those which were equally distributed between soluble and insoluble fractions (Ag, Cu, and Hg). © 2009 Wiley Periodicals, Inc. 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The genus has a worldwide distribution, and some species play an important role as a link in trophic webs. It is well established that many crustaceans are able to survive in contaminated environments by storing metallic pollutants in detoxified form, and thus, they may represent a source of contaminants for their predators. The present study was designed to determine the distribution of bioaccumulated metals, both essential and nonessential, with a view to assessing their availability to the next trophic level. Groups of 1000–1500 adult copepods were exposed for 1–14 days to Ag, Cd, Cu, Hg, Ni, and Zn in water. Three concentrations, chosen to be realistic in comparison with those encountered in polluted environments, were tested for each metal. Copepods were homogenized and metals were analyzed in supernatants (i.e., metals stored in soluble form in soft tissues or easily remobilized from the exoskeleton) and pellets (including metal‐rich detoxificatory granules or with cellular debris) recovered after centrifugation. Another experiment, consisting of desorption tests, was designed to evaluate the fraction of metals loosely bound onto the exoskeleton. The bioaccumulation ability is highly variable, as shown by the ratios between the concentrations reached in <i>T. brevicornis</i> experimentally exposed to different metals (at higher dose and at day 14) and those in controls (7, 12, 18, 26, 53, and 99, respectively, for Zn, Cu, Ni, Cd, Ag, and Hg). Cu, Zn, and Ni concentrations in copepods increased linearly with time over the whole range of exposure concentrations, whereas a plateau body metal concentration was reached with time particularly at the highest exposure concentrations for Cd, Ag, and Hg. Metals bound onto the exoskeleton were remobilized to different extents, the percentages of desorption being 11, 14, 16, 19, 31, and 32, respectively, for Zn, Cd, Cu, Ni, Ag, and Hg. Metals mainly present in the supernatant (Cd, Ni, Zn) are probably more able to be transferred along a food chain than those which were equally distributed between soluble and insoluble fractions (Ag, Cu, and Hg). © 2009 Wiley Periodicals, Inc. Environ Toxicol 25: 350–360, 2010.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Metal distributions in Tigriopus brevicornis (Crustacea, Copepoda) exposed to copper, zinc, nickel, cadmium, silver, and mercury, and implication for subsequent transfer in the food web</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Metal Distributions in Tigriopus brevicornis</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Metal distributions in Tigriopus brevicornis (Crustacea, Copepoda) exposed to copper, zinc, nickel, cadmium, silver, and mercury, and implication for subsequent transfer in the food web</title></titleInfo><name type="personal"><namePart type="given">Sabria</namePart><namePart type="family">Barka</namePart><affiliation>Institut Océanographique, LPEM, CNRS/GDR 1117, Paris, France</affiliation><affiliation>Laboratoire de Toxicologie Marine et Environnementale, UR 09‐03, IPEI, Sfax, Tunisia</affiliation><description>Correspondence: Institut Océanographique, LPEM, CNRS/GDR 1117, Paris, France</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jean‐François</namePart><namePart type="family">Pavillon</namePart><affiliation>Institut Océanographique, LPEM, CNRS/GDR 1117, Paris, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Claude</namePart><namePart type="family">Amiard‐Triquet</namePart><affiliation>ISOMer, SMAB, Service d'Ecotoxicologie, CNRS/GDR 1117, Nantes, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><place><placeTerm type="text">Hoboken</placeTerm></place><dateIssued encoding="w3cdtf">2010-08</dateIssued><dateCaptured encoding="w3cdtf">2008-01-10</dateCaptured><dateValid encoding="w3cdtf">2009-01-31</dateValid><copyrightDate encoding="w3cdtf">2010</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">9</extent><extent unit="tables">1</extent><extent unit="references">80</extent><extent unit="words">7957</extent></physicalDescription><abstract lang="en">The marine copepod Tigriopus brevicornis is a benthic microcrustacean inhabiting splashed rock pools in the intertidal zone. The genus has a worldwide distribution, and some species play an important role as a link in trophic webs. It is well established that many crustaceans are able to survive in contaminated environments by storing metallic pollutants in detoxified form, and thus, they may represent a source of contaminants for their predators. The present study was designed to determine the distribution of bioaccumulated metals, both essential and nonessential, with a view to assessing their availability to the next trophic level. Groups of 1000–1500 adult copepods were exposed for 1–14 days to Ag, Cd, Cu, Hg, Ni, and Zn in water. Three concentrations, chosen to be realistic in comparison with those encountered in polluted environments, were tested for each metal. Copepods were homogenized and metals were analyzed in supernatants (i.e., metals stored in soluble form in soft tissues or easily remobilized from the exoskeleton) and pellets (including metal‐rich detoxificatory granules or with cellular debris) recovered after centrifugation. Another experiment, consisting of desorption tests, was designed to evaluate the fraction of metals loosely bound onto the exoskeleton. The bioaccumulation ability is highly variable, as shown by the ratios between the concentrations reached in T. brevicornis experimentally exposed to different metals (at higher dose and at day 14) and those in controls (7, 12, 18, 26, 53, and 99, respectively, for Zn, Cu, Ni, Cd, Ag, and Hg). Cu, Zn, and Ni concentrations in copepods increased linearly with time over the whole range of exposure concentrations, whereas a plateau body metal concentration was reached with time particularly at the highest exposure concentrations for Cd, Ag, and Hg. Metals bound onto the exoskeleton were remobilized to different extents, the percentages of desorption being 11, 14, 16, 19, 31, and 32, respectively, for Zn, Cd, Cu, Ni, Ag, and Hg. Metals mainly present in the supernatant (Cd, Ni, Zn) are probably more able to be transferred along a food chain than those which were equally distributed between soluble and insoluble fractions (Ag, Cu, and Hg). © 2009 Wiley Periodicals, Inc. Environ Toxicol 25: 350–360, 2010.</abstract><subject lang="en"><genre>keywords</genre><topic>copepods</topic><topic>Tigriopus brevicornis</topic><topic>metals</topic><topic>bioaccumulation</topic><topic>tissular distribution</topic></subject><relatedItem type="host"><titleInfo><title>Environmental Toxicology</title></titleInfo><titleInfo type="abbreviated"><title>Environ. Toxicol.</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Research Article</topic></subject><identifier type="ISSN">1520-4081</identifier><identifier type="eISSN">1522-7278</identifier><identifier type="DOI">10.1002/(ISSN)1522-7278</identifier><identifier type="PublisherID">TOX</identifier><part><date>2010</date><detail type="volume"><caption>vol.</caption><number>25</number></detail><detail type="issue"><caption>no.</caption><number>4</number></detail><extent unit="pages"><start>350</start><end>360</end><total>11</total></extent></part></relatedItem><relatedItem type="preceding"><titleInfo><title>Environmental Toxicology and Water Quality</title></titleInfo><identifier type="ISSN">1053-4725</identifier><identifier type="ISSN">1098-2256</identifier><part><date point="end">1998</date><detail type="volume"><caption>last vol.</caption><number>13</number></detail><detail type="issue"><caption>last no.</caption><number>4</number></detail></part></relatedItem><identifier type="istex">E3A839290B34B43BE8C242B40DDBBF00C0FA526B</identifier><identifier type="DOI">10.1002/tox.20505</identifier><identifier type="ArticleID">TOX20505</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2009 Wiley Periodicals, Inc.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Wiley Subscription Services, Inc., A Wiley Company</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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