Anthropogenic sources and biogeochemical reactivity of particulate and dissolved Cu isotopes in the turbidity gradient of the Garonne River (France)

Petit, Jérôme; Schäfer, Jörg; Coynel, Alexandra; Blanc, Guillaume; Deycard, Victoria N.; Derriennic, Hervé; Lanceleur, Laurent; Dutruch, Lionel; Bossy, Cécile; Mattielli, Nadine

doi:10.1016/j.chemgeo.2013.09.019

Cited by 58 publications

(32 citation statements)

References 44 publications

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“…The higher δ 65 Cu values in fed colonies is linked to the consumption of Cu in the form of particulate organic matter, whereas unfed colonies only rely on the uptake of dissolved inorganic Cu by the symbionts. The δ 65 Cu signature in fed corals indeed follows the rule that organic matter is enriched in the heavier Cu isotope compared to dissolved inorganic Cu (Petit et al., ). The lower δ 66 Zn signature of fed compared to unfed colonies is also in agreement with the observation that carnivores are slightly 66 Zn‐depleted relative to herbivores (Jaouen et al., ).…”

Section: Discussionmentioning

confidence: 82%

Coral bleaching is linked to the capacity of the animal host to supply essential metals to the symbionts

Ferrier‐Pagés

Sauzéat

Balter

2018

Global Change Biology

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Massive coral bleaching events result in extensive coral loss throughout the world. These events are mainly caused by seawater warming, but are exacerbated by the subsequent decrease in nutrient availability in surface waters. It has therefore been shown that nitrogen, phosphorus or iron limitation contribute to the underlying conditions by which thermal stress induces coral bleaching. Generally, information on the trophic ecology of trace elements (micronutrients) in corals, and on how they modulate the coral response to thermal stress is lacking. Here, we demonstrate for the first time that heterotrophic feeding (i.e. the capture of zooplankton prey by the coral host) and thermal stress induce significant changes in micro element concentrations and isotopic signatures of the scleractinian coral Stylophora pistillata. The results obtained first reveal that coral symbionts are the major sink for the heterotrophically acquired micronutrients and accumulate manganese, magnesium and iron from the food. These metals are involved in photosynthesis and antioxidant protection. In addition, we show that fed corals can maintain high micronutrient concentrations in the host tissue during thermal stress and do not bleach, whereas unfed corals experience a significant decrease in copper, zinc, boron, calcium and magnesium in the host tissue and bleach. In addition, the significant increase in δ Cu and δ Zn signature of symbionts and host tissue at high temperature suggests that these isotopic compositions are good proxy for stress in corals. Overall, present findings highlight a new way in which coral heterotrophy and micronutrient availability contribute to coral resistance to global warming and bleaching.

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Section: Discussionmentioning

confidence: 82%

Coral bleaching is linked to the capacity of the animal host to supply essential metals to the symbionts

Ferrier‐Pagés

Sauzéat

Balter

2018

Global Change Biology

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“…However Ilina et al (2013), in a study of pristine 1405 rivers in subarctic watersheds (NW Russia), also found heavy Cu in the dissolved load 1406 Cuparticulates-dissolved around +0.4‰ for Cu (Petit et al 2013). Finally, Chen et al 1415Chen et al (2008, though also in a study primarily aimed at using Zn isotopes to study pollution 1416 sources in the River Seine, France, observe rather subtle isotopic differences between the 1417 particulate and dissolved load.…”

Section: Mo) Fractions 1360mentioning

confidence: 99%

The Isotope Geochemistry of Zinc and Copper

Moynier

Vance

Fujii

et al. 2017

Reviews in Mineralogy and Geochemistry

318

224

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“…Complementarily to traditional methods such as mass balances or sequential extractions, the fate and transport of anthropogenic Cu in the environment can be studied using stable Cu isotopes ( 65 Cu/ 63 Cu) (Babcsányi et al, 2014;Bigalke et al, 2013;Bigalke et al, 2010a;El Azzi et al, 2013;Fekiacova et al, 2015;Pérez Rodríguez et al, 2013;Petit et al, 2013;Thapalia et al, 2010). Cu isotope fractionation was observed during Cu adsorption onto Fe and Al oxy(hydr)oxides (Balistrieri et al, 2008;Pokrovsky et al, 2008), clay minerals (Li et al, 2015), as well as oxidation-reduction (Ehrlich et al, 2004;Zhu et al, 2002), uptake by plants (Jouvin et al, 2012;Ryan et al, 2013) or microorganisms (Navarrete et al, 2011), precipitation as Cu mineral phases (Ehrlich et al, 2004;Maréchal and Sheppard, 2002), and complexation with organic matter (Bigalke et al, 2010b;Ryan et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Copper in soil fractions and runoff in a vineyard catchment: Insights from copper stable isotopes

Babcsányi

Chabaux

Granet

et al. 2016

Science of The Total Environment

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Understanding the fate of copper (Cu) fungicides in vineyard soils and catchments is a prerequisite to limit the off-site impact of Cu. Using Cu stable isotopes, Cu retention in soils and runoff transport was investigated in relation to the use of Cu fungicides and the hydrological conditions in a vineyard catchment (Rouffach, Haut-Rhin, France; mean slope: 15%). The δ(65)Cu values of the bulk vineyard soil varied moderately through the depth of the soil profiles (-0.12 to 0.24‰±0.08‰). The values were in the range of those of the fungicides (-0.21 to 0.11‰) and included the geogenic δ(65)Cu value of the untreated soil (0.08‰). However, δ(65)Cu values significantly differed between particle-size soil fractions (-0.37±0.10‰ in fine clays and 0.23±0.07‰ in silt). Together with the soil mineralogy, the results suggested Cu isotope fractionation primarily associated with the clay and fine clay fractions that include both SOM and mineral phases. The vegetation did not affect the Cu isotope patterns in the vineyard soils. Cu export by runoff from the catchment accounted for 1% of the applied Cu mass from 11th May to 20(th) July 2011, covering most of the Cu use period. 84% of the exported Cu mass was Cu bound to suspended particulate matter (SPM). The runoff displayed δ(65)Cu values from 0.52 to 1.35‰ in the dissolved phase (<0.45μm) compared to -0.34 to -0.02‰ in the SPM phase, indicating that clay and fine clay fractions were the main vectors of SPM-bound Cu in runoff. Overall, this study shows that Cu stable isotopes may allow identifying the Cu distribution in the soil fractions and their contribution to Cu export in runoff from Cu-contaminated catchments.

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Anthropogenic sources and biogeochemical reactivity of particulate and dissolved Cu isotopes in the turbidity gradient of the Garonne River (France)

Cited by 58 publications

References 44 publications

Coral bleaching is linked to the capacity of the animal host to supply essential metals to the symbionts

Coral bleaching is linked to the capacity of the animal host to supply essential metals to the symbionts

The Isotope Geochemistry of Zinc and Copper

Copper in soil fractions and runoff in a vineyard catchment: Insights from copper stable isotopes

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