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Benjamin Pauget Frédéric Gimbert Mickael Coeurdassier Coline Druart Nadia Crini Annette de Vaufleury 《Environmental science and pollution research international》2016,23(4):2987-2996
To better understand the fate of metals in the environment, numerous parameters must be studied, such as the soil properties and the different sources of contamination for the organisms. Among bioindicators of soil quality, the garden snail (Cantareus aspersus) integrates multiple sources (e.g. soil, plant) and routes (e.g. digestive, cutaneous) of contamination. However, the contribution of each source on metal bioavailability and how soil properties influence these contributions have never been studied when considering the dynamic process of bioavailability. Using accumulation kinetics, this study showed that the main assimilation source of Cd was lettuce (68 %), whereas the main source of Pb was the soil (90 %). The plant contribution increased in response to a 2-unit soil pH decrease. Unexpectedly, an increase in the soil contribution to metal assimilation accompanied an increase in the organic matter (OM) content of the soil. For both metals, no significant excretion and influence of source on excretion have been modelled either during exposure or depuration. This study highlights how the contribution of different sources to metal bioavailability changes based on changes in soil parameters, such as pH and OM, and the complexity of the processes that modulate metal bioavailability. 相似文献
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Soulard Christophe-Toussaint Valette Elodie Perrin Coline Abrantes Patricia Catarina Anthopoulou Theodosia Benjaballah Ouassila Bouchemal Salah Dugué Patrick Amrani Mohamed El Lardon Sylvie Marraccini Elisa Mousselin Guilhem Napoleone Claude Paoli Jean-Christophe 《Regional Environmental Change》2018,18(3):651-662
Regional Environmental Change - To address sustainability challenges of agro-ecosystems located in Mediterranean urban regions, this paper focuses on the multidisciplinary subject of urban... 相似文献
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Soraya Rouifed Coline Byczek Daniel Laffray Florence Piola 《Environmental management》2012,50(6):1027-1034
Japanese knotweed s.l. are some of the most invasive plants in the world. Some genotypes are known to be tolerant to the saline concentrations found in salt marshes. Here we focus on tolerance to higher concentrations in order to assess whether the species are able to colonize and establish in highly stressful environments, or whether salt is an efficient management tool. In a first experiment, adult plants of Fallopia japonica, Fallopia?×?bohemica and Fallopia sachalinensis were grown under salt stress conditions by watering with saline concentrations of 6, 30, 120, or 300?g?L?1 for three weeks to assess the response of the plants to a spill of salt. At the two highest concentrations, their leaves withered and fell. There were no effects on the aboveground parts at the lowest concentrations. Belowground dry weight and number of buds were reduced from 30 and 120?g?L?1 of salt, respectively. In a second experiment, a single spraying of 120?g?L?1 of salt was applied to individuals of F.?×?bohemica and their stems were clipped to assess the response to a potential control method. 60?% of the plants regenerated. Regeneration was delayed by the salt treatment and shoot growth slowed down. This study establishes the tolerance of three Fallopia taxa to strong salt stress, with no obvious differences between taxa. Their salt tolerance could be an advantage in their ability to colonize polluted environments and to survive to spills of salt. 相似文献
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