Mercury contents of zooplankton collected in the Tropical Pacific Ocean.

Hirota, Reiichiro; Fujiki, Motoo; Tajima, Shizuko

doi:10.2331/suisan.45.1449

Cited by 12 publications

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“…in thaliaceans at northeastern Australia coast (16°12.0'S and 146°39.0'E). The total mercury values in Hirota et al (1979) study (average: 0.058µg Hg.g -1 ) were lower than those found previously in zooplankton samples (0.081 to 0.448µg Hg.g -1 , average: 0.130µg Hg.g -1 ) collected in a transect between Hawaii and Monterey, California, USA, by Knauer & Martin (1972).…”

Section: Some Studies About Mercury and Plankton In Tropical Marine Econtrasting

confidence: 83%

“…Organisms at the base of food chain have been subject of several studies of the biological effects of contamination on plankton in coastal ecosystems worldwide (Barwick & Maher 2003, Stewart et al 2004, Telesh 2004, Thompson et al 2007). However, in the literature few studies have been documented for tropical marine ecosystem worldwide (Knauer & Martin 1972, Hirota et al 1979, Zindge & Desai 1981, Hirota et al 1983 Kehrig et al 2009aKehrig et al , 2009bKehrig et al , 2010Kehrig et al , 2011.…”

Section: Plankton and Mercurymentioning

confidence: 99%

“…One of the first studies developed in the Tropical Pacific Ocean, from September to December of 1975, measured total mercury in zooplankton collected in eight stations in order to obtain data as a standard for unpolluted waters (Hirota et al 1979). Mercury was determined in each zooplankton group that was sorted to the important groups.…”

Section: Some Studies About Mercury and Plankton In Tropical Marine Ementioning

confidence: 99%

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Mercury and plankton in tropical marine ecosystems: A review

Kehrig

2011

Oecol Aust

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Mercury (Hg) is an exogenous and harmful metal that accumulates in the tissues of organisms along food chain. Bioaccumulation by plankton is therefore of great significance for understanding marine processes concerning Hg accumulation and biomagnification throughout the food chain. Plankton has a short life cycle and plankton species composition respond quickly to environmental changes in the water column, making it a water quality indicator. There is a consensus that Hg enters the food chain via phytoplankton, and then is accumulated by the other links in the chain, via trophic transfer. While Hg is bioconcentrated from water by phytoplankton, comparatively little is known about the concentrations, dynamics, and controls on Hg bioavailability in marine ecosystems. Plankton is one of the last matrixes studied by Hg researchers in a systematic manner. As the base of food chain, these organisms have been the subject of several studies on the biological effects of Hg contamination in coastal ecosystems worldwide, such as in Australia, coast of California (USA) and Baltic Sea. However, few studies in the literature have focused on tropical marine ecosystems. In this review, mercury data on tropical marine plankton is presented based on previous studies on the Tropical Pacific, in Arabian Sea, Gulf of Thailand and the South Atlantic. These studies have contributed to our understanding of mercury behavior, fate, and transport of this element in tropical marine ecosystems. The lack of results in the scientific literature about Hg in marine plankton could be attributed to difficulty in collection, preparation and analysis of this type of samples. Collection is dependent of parameters like luminosity, moon phase, tidal cycle, depth of the water column and physical and chemical parameters of water that influence in the quantitative and qualitative taxonomic groups of plankton present. keywords: Bioaccumulation; biomagnification; trophic transfer; methylmercury; inorganic mercury. resuMoMercúrio e Plâncton eM ecossisteMas Marinhos troPicais: uMa revisão. O mercúrio (Hg) é um metal exógeno e prejudicial à saúde que se acumula nos tecidos dos organismos ao longo das cadeias alimentares. O estudo da bioacumulação do Hg pelo plâncton é de grande importância para a compreensão dos processos marinhos relacionados à sua acumulação e biomagnificação. O plâncton é um indicador da qualidade da água, pois, tem um ciclo de vida curto, e a sua composição de espécies responde rapidamente às mudanças ambientais da coluna d' água. Há um consenso de que o Hg entra na cadeia alimentar via fitoplâncton, que posteriormente, é bioacumulado pelos demais elos da cadeia através da transferência trófica. Enquanto o fitoplâncton bioconcentra o Hg da água, comparativamente, pouco se sabe a respeito das concentrações, dinâmicas e controles sobre a biodisponibilidade e assimilação do Hg nos ecossistemas marinhos. O plâncton é uma das últimas matrizes a ser estudada de forma sistemática em pesquisas sobre Hg. Estes organismos da base da cadeia ...

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Section: Some Studies About Mercury and Plankton In Tropical Marine Econtrasting

confidence: 83%

Section: Plankton and Mercurymentioning

confidence: 99%

Section: Some Studies About Mercury and Plankton In Tropical Marine Ementioning

confidence: 99%

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Mercury and plankton in tropical marine ecosystems: A review

Kehrig

2011

Oecol Aust

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“…The literature includes studies in tropical marine ecosystem (Knauer and Martin 1972; Hirota et al, 1979; Zindge and Desai, 1981; Hirota et al, 1983; Thongra-ar and Parkpian, 2002; Al-Majed and Preston, 2000; Al-Reasi et al, 2007; Kehrig et al, 2009a, b; 2010; 2011). …”

Section: Mercury Inputs To Tropical Coastal Food Websmentioning

confidence: 99%

“…in thaliaceans from Northeastern Australia. However, neither a pronounced regional difference nor a characteristic difference in connection with the food web was identified (Hirota et al, 1979). The Hg tot values in the Hirota et al (1979) study (average: 0.058 µg Hg.g −1 dry wt.)…”

Section: Mercury Inputs To Tropical Coastal Food Websmentioning

confidence: 99%

Mercury in tropical and subtropical coastal environments

Costa

Landing

Kehrig

et al. 2012

Environmental Research

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Anthropogenic activities influence the biogeochemical cycles of mercury, both qualitatively and quantitatively, on a global scale from sources to sinks. Anthropogenic processes that alter the temporal and spatial patterns of sources and cycling processes are changing the impacts of mercury contamination on aquatic biota and humans. Human exposure to mercury is dominated by the consumption of fish and products from aquaculture operations. The risk to society and to ecosystems from mercury contamination is growing, and it is important to monitor these expanding risks. However, the extent and manner to which anthropogenic activities will alter mercury sources and biogeochemical cycling in tropical and sub-tropical coastal environments is poorly understood. Factors as (1) lack of reliable local/regional data; (2) rapidly changing environmental conditions; (3) governmental priorities and; (4) technical actions from supra-national institutions, are some of the obstacles to overcome in mercury cycling research and policy formulation. In the tropics and sub-tropics, research on mercury in the environment is moving from an exploratory “inventory” phase towards more process-oriented studies. Addressing biodiversity conservation and human health issues related to mercury contamination of river basins and tropical coastal environments are an integral part of paragraph 221 paragraph of the United Nations document “The Future We Want” issued in Rio de Janeiro in June 2012.

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Formgedächtnispolymere

Lendlein

Kelch

2002

Angew. Chem.

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der Abteilung f¸r Werkstoffe an der Eidgenˆssischen Technischen Hochschule (ETH) Z¸rich, Schweiz,¸ber abbaubare und biokompatible Multiblockcopolymere mit Hartsegmenten basierend auf bakteriell erzeugten Polyestern. 1996 ausgezeichnet mit der Medaille der ETH, ging er nach einer kurzen Zeit als Postdoc in Z¸rich 1997 als Visiting Scientist zu Professor Robert S. Langer an das Massachusetts Institute of Technology in Cambridge, USA. Seit 1998 leitet er die von ihm aufgebaute Abteilung Entwicklung und Engineering neuer Biomaterialien am Deutschen Wollforschungsinstitut an der RWTH Aachen e.V. und habilitierte 2002 im Fach Makromolekulare Chemie an der RWTH Aachen. Er hat einen Ruf auf eine C4-Professur an der Universit‰t Potsdam und als Leiter des Instituts f¸r Chemie des GKSS Forschungszentrums, Teltow, angenommen. Heute besch‰ftigt er sich mit der Entwicklung von intelligenten Polymeren, insbesondere von Blockcopolymeren und mehrphasigen kovalenten Netzwerken, und deren Verarbeitung und Anwendung vor allem im biomedizinischen Bereich. Neben seiner akademischen Laufbahn gr¸ndete er 1998 gemeinsam mit Langer die Start-up-Firma mnemoScience GmbH in Aachen, die er als Gesch‰ftsf¸hrer leitet. Er ist Inhaber zahlreicher Stipendien, unter anderem von der Studienstiftung des deutschen Volkes ± 1993), der Fritz-Ter-Meer-Stiftung (1989) und der Gottlieb Daimler-und Karl Benz-Stiftung (1993± 1996 sowie des Liebig-Stipendiums des Fonds der Chemischen Industrie (1997 ± 1999). 1998 war er Preistr‰ger im BioFuture-Wettbewerb des BMBF, 1999 erhielt er den Fˆrderpreis der Pinguin-Stiftung und 2000 den Hermann-Schnell-Preis der Gesellschaft Deutscher Chemiker sowie den Innovationspreis des Zenit e. V. Steffen Kelch, geboren 1967 in Mannheim, studierte von 1989 bis 1995 Chemie an der Universit‰t Karlsruhe (TH) und promovierte dort von 1995 ± 1999 bei Professor Matthias Rehahn¸ber das Thema πSynthese und Charakterisierung hochmolekularer Koordinationspolyelektrolyte™. 1996 f¸hrte ihn ein Forschungsaufenthalt in die Gruppe von Priv.-Doz. Dr. Walter Caseri an das Institut f¸r Polymere der ETH Z¸rich, wo er sich mit der Modifikation anorganischer Oberfl‰chen besch‰ftigte. W‰hrend seiner Promotionszeit und danach als wissenschaftlicher Mitarbeiter am Deutschen Kunststoff-Institut in Darmstadt arbeitete er auf dem Gebiet der Charakterisierung von Polyurethannetzwerken. Seit 2000 ist er als Laborleiter in der Abteilung Entwicklung und Engineering neuer Biomaterialien am Deutschen Wollforschungsinstitut an der RWTH Aachen e.V. t‰tig. A. Lendlein S. Kelch AUFSaeTZE Formged‰chtnispolymere Abbildung 2. ‹bergang von der tempor‰ren Form (Spirale) zur permanenten Form (Stab) f¸r ein Formged‰chtnispolymernetzwerk, welches aus Poly(e-caprolacton)dimethacrylat 1 und Butylacrylat 2 (Comonomergehalt: 50 Gew.-%) hergestelllt wurde (vgl. Abschnitt 2.6.2). Die Schalttemperatur dieses Kunststoffs liegt bei 46 8C. Beim Erw‰rmen auf 70 8C dauert der Vorgang 35 s.

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Mercury contents of zooplankton collected in the Tropical Pacific Ocean.

Cited by 12 publications

References 0 publications

Mercury and plankton in tropical marine ecosystems: A review

Mercury and plankton in tropical marine ecosystems: A review

Mercury in tropical and subtropical coastal environments

Formgedächtnispolymere

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