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New critical levels for ozone effects on young trees based on AOT 40 and simulated leaf uptake of ozone
2004
Karlsson, Pererik | Uddling, Johan | Braun, Sabine | Broadmeadow, Mark | Elvira, Susana | Gimeno, Benjamin | Le Thiec, Didier, | Oksanen, Elina | Vandermeiren, Karine | Wilkinson, Matthew | Emberson, Lisa
Biomonitoring of air polluants with plants : considerations for the future
2004
De Temmerman, Ludwig | Bell, Nigel | Garrec, Jean-Pierre, | Klumpp, Andreas | Krause, Georg | Tonneijck, Alfred
Biomonitoring of air pollutants with plants - Considerations for the future
2004
Temmerman, L. De | Bell, N.B. | Garrec, J.P. | Klumpp, A. | Krause, G.H.M. | Tonneijck, A.E.G.
Effect of cropping and tillage on the dissipation of PAH contamination in soil
2004
Saison, Carine | Perrin-Ganier, C. | Schiavon, Michel | Morel, J.L. | Laboratoire Sols et Environnement (LSE) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL)
International audience
Show more [+] Less [-]Long term monitoring of the efficiency of the phytostabilisation of metal-contamined soils
2004
Mench, Michel | Vangronsveld, J.
Baseline study of perfluorochemicals in harbour porpoises (Phocoena phocoena) from Northern Europe
2004
Van de Vijver, Kristin Inneke | Hoff, P. T. | Das, Krishna | Van Dongen, Walter | Esmans, Eddy Louis | Siebert, Ursula | Bouquegneau, Jean-Marie | Blust, Ronny | De Coen, Wim | MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
peer reviewed | Marie-Curie Fellowship
Show more [+] Less [-]Morphology, chemistry and distribution of neoformed spherulites in agricultural land affected by metallurgical point-source pollution
2004
Leguédois, Sophie | van Oort, - | Jongmans, Toine | Chevallier, Pierre | Unité de recherche Science du Sol (USS) ; Institut National de la Recherche Agronomique (INRA) | Laboratory of Soil Science and Geology ; Alterra Wageningen University and Research Centre | Démantèlement de l'installation nucléaire de base 106 (DINB1) ; Centre National de la Recherche Scientifique (CNRS)
41 ref. doi:10.1016/j.envpol.2003.12.023 | International audience | Metal distribution patterns in superficial soil horizons of agricultural land affected by metallurgical point-source pollution were studied using optical and electron microscopy, synchrotron radiation and spectroscopy analyses. The site is located in northern France, at the center of a former entry lane to a bunker of World War II, temporarily paved with coarse industrial waste fragments and removed at the end of the war. Thin sections made from undisturbed soil samples from A and B horizons were studied. Optical microscopy revealed the occurrence of yellow micrometer-sized (Ap horizon) and red decamicrometer-sized spherulites (AB, B1g horizons) as well as distinct distribution patterns. The chemical composition of the spherulites was dominated by Fe, Mn, Zn, Pb, Ca, and P. Comparison of calculated Zn stocks, both in the groundmass and in spherulites, showed a quasi-exclusive Zn accumulation in these neoformed features. Their formation was related to several factors: (i) liberation of metal elements due to weathering of waste products, (ii) Ca and P supply from fertilizing practices, (iii) co-precipitation of metal elements and Ca and P in a porous soil environment, after slow exudation of a supersaturated soil solution in more confined mineral media.
Show more [+] Less [-]Metal availability and soil toxicity after repeated croppings of Thlaspi caerulescens in metal contaminated soils
2004
Keller, Catherine | Hammer, Daniel | Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) ; Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
International audience
Show more [+] Less [-]Applications of C and N stable isotopes to ecological and environmental studies in seagrass ecosystems
2004
Lepoint, Gilles | Dauby, Patrick | Gobert, Sylvie | MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
peer reviewed | Stable isotopes of carbon and nitrogen are increasingly used in marine ecosystems, for ecological and environmental studies. Here, we examine some applications of stable isotopes as ecological integrators or tracers in seagrass ecosystem studies. We focus on both the use of natural isotope abundance as food web integrators or environmental tracers and on the use of stable isotopes as experimental tools. As ecosystem integrators, stable isotopes have helped to elucidate the general structure of trophic webs in temperate, Mediterranean and tropical seagrass ecosystems. As environmental tracers, stable isotopes have proven their utility in sewage impact measuring and mapping. However, to make such environmental studies more comprehensible, future works on understanding of basic reasons for variations of N and C stable isotopes in seagrasses should be encouraged. At least, as experimental tracers, stable isotopes allow the study of many aspects of N and C cycles at the scale of a plant or at the scale of the seagrass ecosystem. (C) 2004 Elsevier Ltd. All rights reserved.
Show more [+] Less [-]Nitrogen dynamics in Posidonia oceanica cuttings: implications for transplantation experiments
2004
Lepoint, Gilles | Vangeluwe, Denis | Eisinger, Michael | Paster, Marcus | van Treeck, Peter | Bouquegneau, Jean-Marie | Gobert, Sylvie | MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
peer reviewed | A N-15 tracer study was performed during an experimental transplantation trial of natural Posidonia oceanica cuttings. The experiment was done in situ at 17 m depth in the Revellata Bay (Calvi, NW Corsica, France). Despite high survival rates of transplants (>90%) after one year, the weight and the N content of transplants are significantly lower than those of reference plants. In absence of roots, the transplants are not able to meet their N requirement because, leaf uptake is insufficient to replenish the N lost during the natural leaf decay. This could constitute a major cause of long-term failure for transplantation experiments or natural recolonisation processes. The increase of the N-15 content in the roots shows that the plant re-allocates the nitrogen of one organ (i.e. leaves, rhizomes) to ensure the growth of another (i.e. roots). (C) 2003 Elsevier Ltd. All rights reserved. | Novel Marine Technology (NOMATEC)
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