Tracing the natural and anthropogenic influence on the trace elemental chemistry of estuarine macroalgae and the implications for human consumption

Ownsworth, Emma; Selby, David; Ottley, Christopher J.; Unsworth, Emily R.; Raab, Andrea; Feldmann, Jörg; Sproson, Adam D.; Kuroda, Junichiro; Faidutti, Camilla; Bücker, Patrick

doi:10.1016/j.scitotenv.2019.05.263

Cited by 24 publications

(40 citation statements)

References 45 publications

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“…The large proportion 408 of terrestrial organic matter (66 to 98% degraded phytoclasts) in the Waipawa Fm 409 (Schiøler et al, 2010;Hollis et al, 2014;Field et al, 2018;Naeher et al, 2019) Harris et al, 2013;Du Vivier et al, 2015). The difference in concentrations of 414Re and Os in the two formations might also be a factor of the abundance, variability 415 and preservation of organisms such as macroalgae that are components of sedimentary organic matter and which have recently been shown to accumulate Re (up to several hundreds of ppb) and Os (Racionero-Gómez et al, 2016;Rooney et al, 2016;Racionero-Gómez et al, 2017;Ownsworth et al, 2019). The accumulation 419 of Re by macroalgae has been shown to be syn-life and unidirectional i.e.…”

Section: Re and Os Uptake And Fractionation In The Waipawa And Whangai Formations 392mentioning

confidence: 99%

Re-Os geochronology and isotope systematics, and organic and sulfur geochemistry of the middle–late Paleocene Waipawa Formation, New Zealand: Insights into early Paleogene seawater Os isotope composition

et al. 2020

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In the middle-late Paleocene, a marine, organic-rich sedimentary unit (Waipawa 24 Formation [Fm]) in which the organic matter was derived mainly from terrestrial plants 25 was deposited in many of New Zealand's sedimentary basins. The unique 26 organofacies of this formation has not been identified in any other time interval within 27 the geological history of the Southwest Pacific, indicating that unusual climatic and 28 oceanographic conditions likely prevailed during this time. It has, therefore, attracted 29 wide scientific interest due to its significance for regional and global reconstruction of 30 the early Paleogene transitional climate as well as potential for oil and gas 31 production. Scarcity of age-diagnostic fossils, presence of unconformities and lack of 32 volcanic interbeds have, however, hindered precise dating and correlations of all the 33 known occurrences of the formation. Here, rhenium-osmium (Re-Os) geochronology 34 has yielded the first radiometric age for the formation (57.5 ± 3.5 Ma), which is 35 consistent with available biostratigraphic age determinations (59.4-58.7 Ma). Further, 36 a comparison of Re-Os, bulk pyrolysis, sulfur and palynofacies data for the Waipawa 37 Fm with those of more typical marine sediments such as the underlying Whangai Fm 38 supports the interpretation that the chelating precursors or fundamental binding sites 39 responsible for uptake of Re and Os are present in all types of organic matter, and 40 that these elements have a greater affinity for organic chelating sites than for 41 sulfides. The results also indicate that sedimentation rate may not play a dominant 42 role in enhanced uptake of Re and Os by organic-rich sedimentary rocks. 43 The initial 187 Os/ 188 Os values for the Waipawa (~0.28) and Whangai (~0.36) 44 formations are broadly similar to those reported for coeval pelagic sediments from 45 the central Pacific Ocean, further constraining the low-resolution marine 187 Os/ 188 Os 46 record of the Paleocene. We present a compilation of 187 Os/ 188 Os values from 47 48 shows that seawater Os gradually became less radiogenic from the latest 49 Cretaceous, reaching a minimum value in the earliest late Paleocene (~59 Ma) 50 during the deposition of Waipawa Fm, and then increased through the later 51 Paleocene and into the early Eocene. The composite Os isotope record broadly 52 correlates with global temperature ( 18 O and TEX 86 ) and carbon isotope ( 13 C) 53 records from the middle Paleocene to early Eocene, which is inferred to reflect 54 climate-modulated changes in continental weathering patterns.

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Section: Re and Os Uptake And Fractionation In The Waipawa And Whangai Formations 392mentioning

confidence: 99%

Re-Os geochronology and isotope systematics, and organic and sulfur geochemistry of the middle–late Paleocene Waipawa Formation, New Zealand: Insights into early Paleogene seawater Os isotope composition

et al. 2020

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“…Currently, the benefits of seaweeds to human health, some of them supported by scientific publications, are gaining more impact on the present society. However, as seaweeds have a great ability to perform bioaccumulation of heavy metals, contaminants [49,50], and iodine [51], the concerns about the consumption of seaweeds are increasing, particularly regarding human health safety. This apprehension is specially related to heavy metals or metalloids (mainly, arsenic), harmful compounds, and iodine concentrations variability in seaweed, which can be very dangerous for human consumption in several species [16,52,53].…”

Section: Introductionmentioning

confidence: 99%

Seaweed’s Bioactive Candidate Compounds to Food Industry and Global Food Security

Leandro

Pacheco

Cotas

et al. 2020

Life

138

111

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The world population is continuously growing, so it is important to keep producing food in a sustainable way, especially in a way that is nutritious and in a sufficient quantity to overcome global needs. Seaweed grows, and can be cultivated, in seawater and generally does not compete for arable land and freshwater. Thus, the coastal areas of the planet are the most suitable for seaweed production, which can be an alternative to traditional agriculture and can thus contribute to a reduced carbon footprint. There are evolving studies that characterize seaweed’s nutritional value and policies that recognize them as food, and identify the potential benefits and negative factors that may be produced or accumulated by seaweed, which are, or can be, dangerous for human health. Seaweeds have a high nutritional value along with a low caloric input and with the presence of fibers, proteins, omega 3 and 6 unsaturated fatty acids, vitamins, and minerals. Moreover, several seaweed sub-products have interesting features to the food industry. Therefore, the focus of this review is in the performance of seaweed as a potential alternative and as a safe food source. Here described is the nutritional value and concerns relating to seaweed consumption, and also how seaweed-derived compounds are already commercially explored and available in the food industry and the usage restrictions to safeguard them as safe food additives for human consumption.

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“…Black arrows are used when the isotopic composition exceeds the confines of the axes. Data references are as follows: precipitation 7,29,30 ; seawater 7,[31][32][33][34][35] ; rivers 1, 29,30,36 ; loess 19,37 , hydrothermal 1 , cosmic dust 32,38 , volcanic aerosols 39,40 ; fossil fuels [13][14][15][16] ; base-metal sulphide ores [8][9][10]24 ; PGE ore 11 ; chromite 12,26 ; car catalyst 27 ; airborne particles 3 ; urban sediments 21,41 ; sewage sludge [18][19][20] ; sewage sludge ash 42 ; humus, grass and leaves, moss and mushrooms 43 ; lichen 24,26 ; and, macroalgae [44][45][46][47] (this study).…”

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confidence: 99%

Anthropogenic Osmium in Macroalgae from Tokyo Bay Reveals Widespread Contamination from Municipal Solid Waste

Sproson

Selby

Suzuki

et al. 2020

Environ. Sci. Technol.

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Human activity is influencing the global osmium cycle, driving the Os isotopic composition ( 187 Os/ 188 Os) of the hydrosphere and associated sedimentary material to lower values. Here, we present the Re and Os abundance and isotope systematics of macroalgae, a proxy for seawater, from Tokyo Bay to elucidate the potential sources of anthropogenic Os to the Pacific Ocean. Macroalgae from the Uraga Channel, which connects Tokyo Bay to the Pacific Ocean, record relatively low Os abundances (∼10.1 pg/ g) and an 187 Os/ 188 Os of ∼0.9, indicative of surface ocean seawater. Contrastingly, macroalgae within the bay closest to central Tokyo record the highest Os abundances (∼22.8 pg/g) and lowest 187 Os/ 188 Os values (∼0.47), suggesting contamination from human activity. To determine the source of anthropogenic Os, we have developed the first Os emission inventory, based on the East Asian Air Pollutant Emission Grid database (EAGrid2010). The close relationship (R 2 = 0.67 and p-value = <0.05) between Os inventories and macroalgal data suggests that municipal solid waste incinerators (MSWIs) are the dominant source of Os to Tokyo Bay. Projections for Japan estimate that 26 −18 +38 ng Os/m 2 /yr is released from MSWI smokestacks, leading to a concentration in precipitation of 26 −18 +38 fg/g, identifying MSWIs as a major contributor of anthropogenic Os to the hydrological cycle.

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Tracing the natural and anthropogenic influence on the trace elemental chemistry of estuarine macroalgae and the implications for human consumption

Cited by 24 publications

References 45 publications

Re-Os geochronology and isotope systematics, and organic and sulfur geochemistry of the middle–late Paleocene Waipawa Formation, New Zealand: Insights into early Paleogene seawater Os isotope composition

Re-Os geochronology and isotope systematics, and organic and sulfur geochemistry of the middle–late Paleocene Waipawa Formation, New Zealand: Insights into early Paleogene seawater Os isotope composition

Seaweed’s Bioactive Candidate Compounds to Food Industry and Global Food Security

Anthropogenic Osmium in Macroalgae from Tokyo Bay Reveals Widespread Contamination from Municipal Solid Waste

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