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1

LEDIEU, L., R. TRAMOY, D. MABILAIS, S. RICORDEL, B. TASSIN, and J. GASPERI. "Dynamique de transfert des macroplastiques en estuaire de Loire : trajectoires et facteurs d’influence." Techniques Sciences Méthodes 3 (March 20, 2023): 53–62. http://dx.doi.org/10.36904/202303053.

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La quantification des flux de macroplastiques transférés par les fleuves fait l’objet de plus en plus d’études scientifiques, mais une meilleure appréciation de ces flux nécessite une compréhension fine de la dynamique de transfert de ces déchets en milieu estuarien, interface entre le milieu continental et le milieu océanique. À l’image de ce qui a été réalisé sur la Seine dans le cadre du projet Macro-Plast, cette étude cherche à caractériser la trajectoire des déchets plastiques en estuaire de Loire. Dans ce but, des bouteilles plastiques de flottabilités différentes ont été équipées de balises GPS et lâchées à différents niveaux de l’estuaire entre janvier 2020 et juillet 2021. 35 trajectoires d’un maximum de deux mois ont été enregistrées. Celles-ci présentent une forte variabilité spatiotemporelle avec des distances totales parcourues comprises entre 100 m et 103,6 km. Les distances parcourues en estuaire de Loire sont toutefois plus faibles que celles mesurées en Seine. En effet, la morphologie particulière de l’estuaire de Loire (berges à pentes faibles, zones submersibles, roselières) donne lieu à des échouages rapides et une remobilisation difficile des macroplastiques. La flottabilité joue un rôle important dans la dynamique de transfert des macroplastiques, mais leurs trajectoires animées par des allers-retours et des phénomènes d’échouage/remobilisation démontrent qu’elles sont également influencées par d’autres facteurs environnementaux dont la marée. Cette dynamique complexe et le fait que comme en estuaire de Seine, aucune bouteille n’a atteint le milieu océanique, questionne l’évaluation des flux réels de macroplastiques transférés des milieux continentaux vers les océans par des méthodes simplement statistiques.
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2

Nicol, Charles. "Les protestants et les ports de l’estuaire de la Loire (XVIe-XIXe siècles) : un enjeu stratégique." Revue d'histoire du protestantisme 9, no. 4 (December 12, 2024): 437–53. https://doi.org/10.47421/rhp_9.4_437-453.

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Dès le XVIe siècle, les idées de la Réforme se répandent sur l’estuaire de la Loire et à Nantes en particulier qui occupe le premier rang des ports français jusqu’au milieu du XVIIIe siècle. La circulation maritime et la présence hollandaise ont contribué à l’implantation des protestants notamment autour du commerce du sel. L’estuaire de la Loire représente un enjeu stratégique qui oppose le puissant parti ultracatholique de la Ligue au protestant Henri de Navarre bien avant la signature de l’édit de pacification de 1598. À sa révocation, les protestants disparaissent mais se réinstallent à Nantes et dans sa région dès le milieu du XVIIIe siècle. C’est encore la Loire qui justifie pour l’essentiel leur retour. Et c’est à partir de son estuaire que se conjugue un « protestantisme portuaire », du XVIe au XXe siècles.
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3

Gaudin, Cécile. "Estuaire de la Loire: histoire d’une région." Mappemonde 48, no. 4 (1997): 42. http://dx.doi.org/10.3406/mappe.1997.2271.

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4

Arthuis, Rémy, David Guitton, and Jimmy Mouchard. "D’un estuaire à l’autre. Géoarchéologie comparée des ports antiques d’Aizier et de Rezé." Archeopages 30 (2010): 26–35. https://doi.org/10.4000/137v3.

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Les sites d’Aizier et de Rezé sont localisés respectivement dans les estuaires de la Seine et de la Loire. Deux programmes de recherche y ont été lancés en 2005, apportant des données nouvelles sur l’architecture et l’organisation des infrastructures portuaires antiques en milieu fluvio-maritime. Les deux sites ont livré des vestiges d’aménagements portuaires monumentaux réalisés avec des matériaux variés et suivant des principes architecturaux différents. Les fouilles menées à Aizier ont mis au jour une terrasse couplée à un quai, tandis que celles de Rezé ont révélé une vaste construction mixte associant bois et pierre sèche subdivisée en caissons. Cette étude comparative aborde ainsi la question des structures portuaires dans les zones d’interface entre fleuve et littoral, mettant en évidence l’installation de points de rupture de charges des navigations fluviale et maritime parfaitement structurés : une zone basse accueillant les navires, une zone intermédiaire où sont déposées les marchandises et une zone haute où elles sont stockée.
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5

Chauveau, Caroline. "Clisson (Loire-Atlantique). Château." Archéologie médiévale, no. 46 (December 1, 2016): 253–54. http://dx.doi.org/10.4000/archeomed.7397.

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6

Devals, Christophe. "Guérande (Loire-Atlantique). Villejames." Archéologie médiévale, no. 39 (December 1, 2009): 187–89. http://dx.doi.org/10.4000/archeomed.19679.

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7

Setzer, Gérard. "Machecoul (Loire-Atlantique). Château." Archéologie médiévale, no. 39 (December 1, 2009): 282. http://dx.doi.org/10.4000/archeomed.20326.

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8

Schmidt, Sabine, and Ibrahima Iris Diallo. "Hypoxia also occurs in small highly turbid estuaries: the example of the Charente (Bay of Biscay)." Biogeosciences 21, no. 7 (April 10, 2024): 1785–800. http://dx.doi.org/10.5194/bg-21-1785-2024.

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Abstract. The French coast facing the Bay of Biscay (North-East Atlantic) is characterised by the presence of small macrotidal and turbid estuaries, including the Charente, which is geographically located between the two large estuaries of the Gironde and the Loire (south-west France). Multi-year, multi-site and high-frequency water quality surveys have shown that the Loire and, to a lesser extent, the Gironde suffer from summer hypoxia. These observations raised the question of the possible occurrence of hypoxia, particularly in one of these small estuaries, the Charente, which flows into the Bay of Marennes-Oléron, the first oyster-farming area in France. Unlike its two large neighbours, the Charente estuary is not continuously monitored, although it is subject to similar climatic changes and anthropogenic pressures, making it impossible to assess potential risks to the ecosystem. Here we present a first study of dissolved oxygen in the Charente estuary based on a combination of longitudinal studies along the estuary axis and instrumented sites to determine the intensity and spatial extent of deoxygenation. Temperature, dissolved oxygen and conductivity sensors were deployed at several sites during the summers of 2018, 2019 and 2020 to record temperature, salinity and dissolved oxygen every 15 min. The high-frequency dataset is compared with a long-term low-frequency dataset (1975–2022; 8–12 measurements per year) to determine whether or not there is a deterioration in the oxygenation of the Charente estuary. The high-frequency dataset shows a high variability in dissolved oxygen (DO) with a clear influence of the tidal cycle. During summer, DO concentrations are often below 5 mg L−1 and sometimes even below 2 mg L−1, indicating the presence of a summer estuarine oxygen minimum zone with an extension along the estuarine axis of about 20–25 km. Temperature is the main factor controlling DO in the Charente estuary, which limits preventive management strategies and, in the context of global warming, raises questions about the long-term suitability of estuarine conditions for the needs of the biological communities, particularly migratory fish.
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9

Chauveau, Caroline. "Clisson (Loire-Atlantique). Fortifications modernes." Archéologie médiévale, no. 49 (December 20, 2019): 312–13. http://dx.doi.org/10.4000/archeomed.23636.

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10

Chauveau, Caroline. "Clisson (Loire-Atlantique). Les Halles." Archéologie médiévale, no. 49 (December 20, 2019): 221–22. http://dx.doi.org/10.4000/archeomed.24991.

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11

Fabre, Caroline. "Nantes (Loire-Atlantique). Caserne Mellinet." Archéologie médiévale, no. 49 (December 20, 2019): 235–36. http://dx.doi.org/10.4000/archeomed.25021.

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12

Peytremann, Édith. "Paulx (Loire-Atlantique). La Charouillère." Archéologie médiévale, no. 47 (December 20, 2017): 164. http://dx.doi.org/10.4000/archeomed.6841.

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13

Le Boulaire, Antoine, and Édith Peytremann. "Savenay (Loire-Atlantique). La Touchelais." Archéologie médiévale, no. 46 (December 1, 2016): 197. http://dx.doi.org/10.4000/archeomed.7246.

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14

Briand, Fabien. "Ancenis (Loire-Atlantique). Le Château." Archéologie médiévale, no. 45 (December 1, 2015): 232–33. http://dx.doi.org/10.4000/archeomed.7771.

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15

Devals, Christophe. "Guérande gallo-romaine (Loire-Atlantique)." Aremorica. Études sur l'ouest de la Gaule romaine 3, no. 1 (2009): 23–46. http://dx.doi.org/10.3406/aremo.2009.873.

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16

Mercier, Jérôme. "Nantes (Loire-Atlantique). Musée Dobrée." Archéologie médiévale, no. 50 (December 30, 2020): 205–6. http://dx.doi.org/10.4000/archeomed.36376.

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17

Fabre, Caroline. "Nantes (Loire-Atlantique). Caserne Mellinet." Archéologie médiévale, no. 50 (December 30, 2020): 205. http://dx.doi.org/10.4000/archeomed.36371.

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18

Peretti, Ophélie de, and Yves Henigfeld. "Rezé (Loire-Atlantique). Saint-Lupien." Archéologie médiévale, no. 43 (December 1, 2013): 231. http://dx.doi.org/10.4000/archeomed.10042.

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19

Peretti, Ophélie de. "Rezé (Loire-Atlantique). Saint-Lupien." Archéologie médiévale, no. 42 (December 1, 2012): 254. http://dx.doi.org/10.4000/archeomed.10994.

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20

Briand, Fabien. "Machecoul (Loire-Atlantique). Le château." Archéologie médiévale, no. 42 (December 1, 2012): 294–95. http://dx.doi.org/10.4000/archeomed.11067.

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21

Briand, Fabien. "Machecoul (Loire-Atlantique). Le Château." Archéologie médiévale, no. 41 (December 1, 2011): 278. http://dx.doi.org/10.4000/archeomed.12579.

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22

Briand, Fabien. "Machecoul (Loire-Atlantique). Le château." Archéologie médiévale, no. 40 (December 1, 2010): 270–71. http://dx.doi.org/10.4000/archeomed.15187.

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23

Gaugé, Érica. "Nantes (Loire-Atlantique). Rue Saint-Donatien." Archéologie médiévale, no. 47 (December 20, 2017): 261. http://dx.doi.org/10.4000/archeomed.8022.

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24

Chauveau, Caroline. "Nantes (Loire-Atlantique). 8, rue Ogée." Archéologie médiévale, no. 44 (December 1, 2014): 200–201. http://dx.doi.org/10.4000/archeomed.9083.

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25

Chauveau, Caroline. "Châteaubriant (Loire-Atlantique). Donjon du château." Archéologie médiévale, no. 44 (December 1, 2014): 262–63. http://dx.doi.org/10.4000/archeomed.9290.

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26

Coutant, Édith. "Pour une animation décloisonnée. Loire-Atlantique." Les Cahiers Dynamiques 41, no. 1 (2008): 33. http://dx.doi.org/10.3917/lcd.041.0033.

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27

Briand, Fabien. "Nantes (Loire-Atlantique). Château de Nantes." Archéologie médiévale, no. 50 (December 30, 2020): 313. http://dx.doi.org/10.4000/archeomed.34818.

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28

Martineau, Jocelyn. "Montoir-de-Bretagne (Loire-Atlantique). L’Ormois." Archéologie médiévale, no. 41 (December 1, 2011): 206–7. http://dx.doi.org/10.4000/archeomed.11835.

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29

Laurens-Berge, Mathieu. "Nantes (Loire-Atlantique). 2, rue Portail." Archéologie médiévale, no. 41 (December 1, 2011): 237–38. http://dx.doi.org/10.4000/archeomed.12223.

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30

Lemée, Malo. "Derval (Loire-Atlantique). Château de Derval." Archéologie médiévale, no. 48 (December 20, 2018): 300–301. http://dx.doi.org/10.4000/archeomed.17390.

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31

Gallien, Véronique. "Chéméré (Loire-Atlantique). Rue du Brigandin." Archéologie médiévale, no. 39 (December 1, 2009): 309. http://dx.doi.org/10.4000/archeomed.20561.

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32

Teisson, Ch, and D. Fritsch. "NUMERICAL MODELLING OF SUSPENDED SEDIMENT TRANSPORT IN THE LOIRE ESTUARY." Coastal Engineering Proceedings 1, no. 21 (January 29, 1988): 202. http://dx.doi.org/10.9753/icce.v21.202.

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In order to evaluate silt displacements and deposits in the outer part of the Loire Estuary over one year, a two-dimensional depth-integrated model of suspended sediment transport has been carried out. It takes into account transport and dispersion of suspended sediment by tidal currents, and processes of erosion, deposition and bed consolidation. Erosion laws and consolidation laws are specific of the Loire Estuary and come from laboratory experiments. Representative tidal conditions and river Loire flowrates have been identified : results of the model for these typical cases will be tentatively extrapolated to a one year evolution.
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33

Mahé, Gilles. "Observations en Loire-Atlantique (France) de Stenoria analis (Schaum) (Coleoptera, Meloidae), cleptoparasite de Colletes hederae Schmidt & Westrich (Hymenoptera, Colletidae)." Osmia 2 (2008): 11–15. http://dx.doi.org/10.47446/osmia2.5.

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Observations in Loire-Atlantique (France) of Stenoria analis (Schaum) (Coleoptera, Meloidae), cleptoparasite of Colletes hederae Schmidt & Westrich (Hymenoptera, Colletidae). - In September 2007 the author observed in Loire-Atlantique (France) Stenoria analis Schaum during the mating, the egg-laying, the hatching of the triungulins (first instar larvae of the blister beetle). Pictures taken on the site of observations show how the triungulins cling to the males of Colletes hederae Schmidt & Westrich to reach the nest of their host bees where the larvae will complete their life cycle.
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34

Renard, Jean. "Bonnet (N.) – Le succès du bocage, l’histoire des industries du sud-Loire (Loire-Atlantique, Maine-et-Loire, Vendée)." Norois, no. 209 (December 15, 2008): 179–80. http://dx.doi.org/10.4000/norois.2659.

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35

Laurens-Berge, Mathieu. "Nantes (Loire-Atlantique). Square Fleuriot de Langle." Archéologie médiévale, no. 49 (December 20, 2019): 324. http://dx.doi.org/10.4000/archeomed.23711.

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36

Briand, Fabien. "Blain (Loire-Atlantique). Château de la Groulais." Archéologie médiévale, no. 46 (December 1, 2016): 247. http://dx.doi.org/10.4000/archeomed.7381.

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37

Touchefeu, Catherine, and Jean-Pierre Saez. "Projets culturels de territoire en Loire-Atlantique." L'Observatoire N°54, no. 2 (2019): 61. http://dx.doi.org/10.3917/lobs.054.0061.

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38

Briand, Fabien. "Blain (Loire-Atlantique). Château de la Groulais." Archéologie médiévale, no. 50 (December 30, 2020): 292–93. http://dx.doi.org/10.4000/archeomed.34518.

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39

Ladiré, Damien. "Nantes (Loire-Atlantique). Chapelle de l’Immaculée Conception." Archéologie médiévale, no. 42 (December 1, 2012): 247–49. http://dx.doi.org/10.4000/archeomed.10986.

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40

Laurens-Berge, Mathieu. "Nantes (Loire-Atlantique). Réseaux d’assainissement Neptune-Bouffay." Archéologie médiévale, no. 41 (December 1, 2011): 208. http://dx.doi.org/10.4000/archeomed.11855.

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41

Peytremann, Édith. "Chevrolière (La) (Loire-Atlantique). Tournebride/Les Huguetières." Archéologie médiévale, no. 48 (December 20, 2018): 206–7. http://dx.doi.org/10.4000/archeomed.16537.

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42

Devals, Christophe. "Les pirogues monoxyles du Brivet (Loire-Atlantique)." Revue archéologique de l'Ouest, no. 25 (December 20, 2008): 305–38. http://dx.doi.org/10.4000/rao.713.

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43

Aubry, Stéphane. "Saint-Philbert-de-Grand-Lieu (Loire-Atlantique). Abbatiale." Archéologie médiévale, no. 44 (December 1, 2014): 241–42. http://dx.doi.org/10.4000/archeomed.9240.

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44

Pluchon, Bernard. "L’accueil des gens du voyage en Loire-Atlantique." Etudes Tsiganes 61-62, no. 2 (2017): 124. http://dx.doi.org/10.3917/tsig.061.0124.

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45

Litoux, Emmanuel. "Loire-Atlantique. Château de la Seilleraye à Carquefou." Bulletin Monumental 158, no. 2 (2000): 150–51. http://dx.doi.org/10.3406/bulmo.2000.2376.

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46

Polinski, Alexandre, and Lionel Pirault. "Les carrières gallo-romaines de Rezé (Loire-Atlantique)." Revue archéologique de l'Ouest, no. 29 (December 30, 2012): 201–22. http://dx.doi.org/10.4000/rao.1844.

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47

Codron, Jean-Marie, and Patrick Rio. "Croissance et financement des serristes en Loire-Atlantique." Économie rurale 210, no. 1 (1992): 32–38. http://dx.doi.org/10.3406/ecoru.1992.4479.

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48

de LA BROISE, P. "La pépinière expérimentale de Guémené-Penfao (Loire-Atlantique)." Revue Forestière Française, S (1987): 130. http://dx.doi.org/10.4267/2042/25836.

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49

Houdemont, Morgane. "Étude des temps surcomposés à Couëron, Loire-Atlantique." Cahiers de sociolinguistique 12, no. 1 (2007): 111. http://dx.doi.org/10.3917/csl.0701.0111.

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50

Dulaquais, Gabriel, Matthieu Waeles, Johann Breitenstein, Joël Knoery, and Ricardo Riso. "Links between size fractionation, chemical speciation of dissolved copper and chemical speciation of dissolved organic matter in the Loire estuary." Environmental Chemistry 17, no. 5 (2020): 385. http://dx.doi.org/10.1071/en19137.

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Environmental contextThe toxicity of copper to aquatic life is highly dependent on its chemical form. In the vineyards of the Loire valley, mixtures of copper compounds are increasingly being used as fungicides. Our study investigating the origin and behaviour of dissolved copper on the land-sea continuum of the Loire advances our understanding of the chemical forms and fate of copper in estuarine systems. AbstractWe present data on the organic speciation of dissolved copper (dCu) in the Loire estuary for the soluble (<0.02µm) and dissolved (<0.45µm) fractions. These results were interpreted according to the distribution of natural organic matter along the estuary. We observed a high concentration of dCu (80nmolkg−1) upstream of the tidal front (S=0.1, where S is the salinity), possibly induced by drainage from vineyards located on the watershed of the estuary, and a concentration typical of coastal seawater at the end of the salinity gradient (3–4nmolkg−1). dCu showed a non-conservative distribution along the estuary with a notably strong decrease in concentration at the very first stage of mixing (S ~ 0.5) that increased again at low salinity (S=4.7). The latter increase in the concentration of dCu was related to the supply of colloidal copper induced by particle desorption in the maximum turbidity zone. The organic speciation of dCu revealed that the complexing capacity of copper ligands (LCu, up to 147 nanomoles of Cu per kilogram of water) exceeded dCu in both the soluble and dissolved fractions, which kept the activity of cupric ions below toxic levels for most unicellular phytoplankton. Humic substances comprised up to 95% of LCu in the continental shelf sample, but their complexing capacity did not account for all of the LCu in the inner estuary. We conducted pseudopolarographic experiments and found two other additional ligand classes: thiol-like and amino-acids/proteins. While humic substances are the dominant component of dissolved organic matter (DOM), the study of DOM suggested the release of colloidal DOM from a wastewater treatment plant. This structure could be a major source of proteinaceous LCu in the system that changes the dCu speciation in the middle of the estuary.
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