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Mougin Christian Campbell Peter G. C. Couderchet Michel Denèfle Patrice Martin-Laurent Fabrice Roland Philippe Slaveykova Vera I. Vincent Tatiana Delaunay Delphine 《Environmental science and pollution research international》2021,28(2):1283-1286
Environmental Science and Pollution Research - The scientific knowledge produced by academic research can be valued in all sectors of human activity, including private sector. The ROVALTAIN... 相似文献
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Laffont Laure Menges Johanna Goix Sylvaine Gentès Sophie Maury-Brachet Régine Sonke Jeroen E. Legeay Alexia Gonzalez Patrice Rinaldo Raphaëlle Maurice Laurence 《Environmental science and pollution research international》2021,28(43):60609-60621
Environmental Science and Pollution Research - The aim of the study was to determine if gold-mining activities could impact the mercury (Hg) concentrations and isotopic signatures in freshwater... 相似文献
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In a population exhibiting partial migration (i.e. migration and residency tactics occur in the same population), the mechanisms
underlying the tactical choice are still unclear. Empirical studies have highlighted a variety of factors that could influence
the coexistence of resident and migratory individuals, with growth and body size considered to be key factors in the decision
to migrate. Most studies suffer from at least one of the two following caveats: (1) survival and capture probabilities are
not taken into account in the data analysis, and (2) body size is often used as a proxy for individual growth. We performed
a capture–mark–recapture experiment to study partial migration among juvenile brown trout Salmo trutta at the end of their first year, when a portion of the population emigrate from the natal stream while others choose residency
tactic. Bayesian multistate capture–recapture models accounting for survival and recaptures probabilities were used to investigate
the relative role of body size and individual growth on survival and migration probabilities. Our results show that, despite
an apparent effect of both size and growth on migration, growth is the better integrative parameter and acts directly on migration
probability whereas body size acts more strongly on survival. Consequently, we recommend caution if size is used as a proxy
for growth when studying the factors that drive partial migration in juvenile salmonid species. 相似文献
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Importance of competition mechanisms in successive invasions by polyphagous tephritids in La Reunion
Understanding the strength and modes of interspecific interactions between introduced and resident species (native or previously introduced) is necessary to predict invasion success. We evaluated different mechanisms of interspecific competition among four species of polyphagous fruit flies (Diptera: Tephritidae) from the island of La Reunion: one endemic species, Ceratitis catoirii, and three exotic species, C. capitata, C. rosa, and Bactrocera zonata, that have successively invaded the island. Larval competition experiments, i.e., co-infestations of the same fruit, and behavioral interference experiments measuring the ability of one female to displace another from a fruit, were performed among all pairs of the four species. We observed asymmetric and hierarchical interactions among species in both larval and adult interference competition. In agreement with the hypothesis that invasion is competition-limited, the competitive hierarchy coincided with the temporal sequence of establishment on the island, i.e., each newly established species tended to be competitively dominant over previously established ones. 相似文献
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Cadmium concentration in tobacco (Nicotiana tabacum L.) from different countries and its relationship with other elements 总被引:1,自引:0,他引:1
Cadmium accumulation in crop plants, such as tobacco (Nicotiana tabacum L.), can lead to human exposure to this carcinogenic metal. To better define actual Cd distribution in cured or processed tobacco leaves from chief tobacco-producing regions, we analyzed 755 leaf samples of three major types (Flue-cured, Burley, and Oriental) obtained from 13 countries during 2001-2003. This survey may help identify regions with low- or high-Cd concentrations in tobacco to obtain insight into the cause of the concentration extremes and to assist in defining strategies to reduce Cd in tobacco. Cadmium concentrations in the samples ranged from 0 to 6.78 microg g(-1), as determined by ICP-MS. Significant differences were found among types and among countries, but significant interactions between type and country were found. Variations in Cd concentrations were also found in all countries. Our results suggest an important contribution of the field (e.g., bioavailable Cd in soil, other soil characteristics) to the Cd concentration in tobacco. Finally, the correlation between the concentration of Cd and that of other elements differed among the types, which could be effectively discriminated based on the concentrations of 20 elements. 相似文献
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Comparative study of the fate and mobility of metals discharged in mining and urban effluents using sequential extractions on suspended solids 总被引:1,自引:0,他引:1
Christian Gagnon Patrice Turcotte Bernard Vigneault 《Environmental geochemistry and health》2009,31(6):657-671
The fate, bioavailability and environmental impacts of metals discharged in municipal and mining wastewater discharge will
depend to a large extent on chemical speciation and distribution. Previous studies on metal bioaccumulation have shown that
total metal concentrations are not a good predictor of bioavailability in the dispersion plumes of municipal effluents. The
objective of this study was to determine the solid phase speciation of metals in surface waters receiving urban and mining
effluents in order to assess their fate and relative mobility in the receiving environment. Suspended particulate matter was
sampled using sediment traps at several sites downstream of effluent outfall plumes as well as at reference upstream sites.
Particulate metal in operationally defined fractions—exchangeable/carbonates, reducible, oxidisable and residual—were determined
in suspended particulate matter with a series of selective chemical extractions. Metal enrichment in suspended particles was
generally observed in both mining and urban effluent discharges. When compared to its receiving environment, the mining effluent
appeared to release more particulate metals (Cu, Fe, Zn) in the most reactive fractions (i.e. exchangeable/carbonates + reducible
forms, 23–43%), while other released metals, such as Cd and Mn, were predominantly in the least reactive forms (i.e., oxidisable + residual,
73–97%). In contrast, the reactivity of all particulate metals, with the exception of Mn, from the urban effluent was much
higher, with up to 65, 42, 30 and 43% for Cd, Cu, Fe and Zn, respectively, in the two most reactive fractions. As expected
in effluent dispersion plumes, parameters such as the organic carbon, Fe oxide and carbonate contents have specific effects
on the partitioning of several trace metals, particularly Cd, Cu and Zn. Our results indicated that the relative distributions
of metals among geochemical fractions varied in the effluent receiving waters where organic carbon and Fe oxides appeared
as the most important parameters. This could therefore decrease the exposure for aquatic organisms that are exposed to those
contaminated sediments as well as the risk to human health. 相似文献