Effects of increasing levels of nickel contamination on structure of offshore nematode communities in experimental microcosms.
Identifieur interne : 000599 ( Main/Exploration ); précédent : 000598; suivant : 000600Effects of increasing levels of nickel contamination on structure of offshore nematode communities in experimental microcosms.
Auteurs : A. Hedfi [Tunisie] ; E. Mahmoudi ; F. Boufahja ; H. Beyrem ; P. AïssaSource :
- Bulletin of environmental contamination and toxicology [ 0007-4861 ] ; 2007.
English descriptors
- KwdEn :
- MESH :
- chemical , toxicity : Nickel, Water Pollutants, Chemical.
- classification : Nematoda.
- drug effects : Nematoda.
- Animals, Biodiversity, Population Density, Species Specificity.
Abstract
A microcosm experiment was used to examine the effects of nickel on offshore nematode communities of a Tunisian coastal zone (Southwestern Mediterranean Sea). Sediments were contaminated with three nickel concentrations [low (250 ppm), medium (550 ppm) and high (900 ppm)], and effects were examined after 30 days. Results showed significant differences between nematode assemblages from undisturbed controls and those from nickel treatments. Most univariates measures, including diversity and species richness, decreased significantly with increasing level of Ni contamination. Results from multivariate analyses of the species abundance data demonstrated that responses of nematode species to the nickel treatments were varied: Leptonemella aphanothecae was eliminated at all the nickel doses tested and seemed to be intolerant species to nickel contamination; Daptonema normandicum, Neochromadora trichophora and Odontophora armata which significantly increased at 550 ppm nickel concentration appeared to be "opportunistic" species at this dose whereas Oncholaimus campylocercoides and Bathylaimus capacosus which increased at all doses tested (250, 550 and 900 ppm) seemed to be "nickel-resistant" species.
DOI: 10.1007/s00128-007-9261-0
PubMed: 17712504
Affiliations:
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Le document en format XML
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Mahmoudi</name></author><author><name sortKey="Boufahja, F" sort="Boufahja, F" uniqKey="Boufahja F" first="F" last="Boufahja">F. Boufahja</name></author><author><name sortKey="Beyrem, H" sort="Beyrem, H" uniqKey="Beyrem H" first="H" last="Beyrem">H. Beyrem</name></author><author><name sortKey="Aissa, P" sort="Aissa, P" uniqKey="Aissa P" first="P" last="Aïssa">P. 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Hedfi</name><affiliation wicri:level="1"><nlm:affiliation>Unité d'Ecologie Côtière Faculté des Sciences de Bizerte, Laboratoire de Biosurveillance de l'Environnement, 7021 Zarzouna, Bizerte, Tunisia. hedfi.amor@laposte.net</nlm:affiliation><country xml:lang="fr">Tunisie</country><wicri:regionArea>Unité d'Ecologie Côtière Faculté des Sciences de Bizerte, Laboratoire de Biosurveillance de l'Environnement, 7021 Zarzouna, Bizerte</wicri:regionArea><wicri:noRegion>Bizerte</wicri:noRegion></affiliation></author><author><name sortKey="Mahmoudi, E" sort="Mahmoudi, E" uniqKey="Mahmoudi E" first="E" last="Mahmoudi">E. Mahmoudi</name></author><author><name sortKey="Boufahja, F" sort="Boufahja, F" uniqKey="Boufahja F" first="F" last="Boufahja">F. Boufahja</name></author><author><name sortKey="Beyrem, H" sort="Beyrem, H" uniqKey="Beyrem H" first="H" last="Beyrem">H. Beyrem</name></author><author><name sortKey="Aissa, P" sort="Aissa, P" uniqKey="Aissa P" first="P" last="Aïssa">P. Aïssa</name></author></analytic><series><title level="j">Bulletin of environmental contamination and toxicology</title><idno type="ISSN">0007-4861</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Biodiversity</term><term>Nematoda (classification)</term><term>Nematoda (drug effects)</term><term>Nickel (toxicity)</term><term>Population Density</term><term>Species Specificity</term><term>Water Pollutants, Chemical (toxicity)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="toxicity" xml:lang="en"><term>Nickel</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" qualifier="classification" xml:lang="en"><term>Nematoda</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Nematoda</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Biodiversity</term><term>Population Density</term><term>Species Specificity</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A microcosm experiment was used to examine the effects of nickel on offshore nematode communities of a Tunisian coastal zone (Southwestern Mediterranean Sea). Sediments were contaminated with three nickel concentrations [low (250 ppm), medium (550 ppm) and high (900 ppm)], and effects were examined after 30 days. Results showed significant differences between nematode assemblages from undisturbed controls and those from nickel treatments. Most univariates measures, including diversity and species richness, decreased significantly with increasing level of Ni contamination. Results from multivariate analyses of the species abundance data demonstrated that responses of nematode species to the nickel treatments were varied: Leptonemella aphanothecae was eliminated at all the nickel doses tested and seemed to be intolerant species to nickel contamination; Daptonema normandicum, Neochromadora trichophora and Odontophora armata which significantly increased at 550 ppm nickel concentration appeared to be "opportunistic" species at this dose whereas Oncholaimus campylocercoides and Bathylaimus capacosus which increased at all doses tested (250, 550 and 900 ppm) seemed to be "nickel-resistant" species.</div></front></TEI><affiliations><list><country><li>Tunisie</li></country></list><tree><noCountry><name sortKey="Aissa, P" sort="Aissa, P" uniqKey="Aissa P" first="P" last="Aïssa">P. Aïssa</name><name sortKey="Beyrem, H" sort="Beyrem, H" uniqKey="Beyrem H" first="H" last="Beyrem">H. Beyrem</name><name sortKey="Boufahja, F" sort="Boufahja, F" uniqKey="Boufahja F" first="F" last="Boufahja">F. Boufahja</name><name sortKey="Mahmoudi, E" sort="Mahmoudi, E" uniqKey="Mahmoudi E" first="E" last="Mahmoudi">E. Mahmoudi</name></noCountry><country name="Tunisie"><noRegion><name sortKey="Hedfi, A" sort="Hedfi, A" uniqKey="Hedfi A" first="A" last="Hedfi">A. Hedfi</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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