Trace elements in the seagrass Posidonia oceanica: Compartmentation and relationships with seawater and sediment concentrations

Malea, Paraskevi; Mylona, Zoi; Kevrekidis, Theodoros

doi:10.1016/j.scitotenv.2019.05.418

Cited by 22 publications

(25 citation statements)

References 53 publications

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“…The results from this study put forward that C. serrulata is an excluder and accumulator [6,11] of Fe, Mn, Cu, Zn, Cd, Cr, Pb, and Ni, and has on average the ability to translocate heavy metals from sediments to the seagrass compartments. In summary, bioaccumulation or translocation of heavy metals from benthic sediment to above-ground seagrass compartments are not a function of only morphological or structural and physiological variations in seagrass compartments, but also the element involved [13]. Translocation of metals may be because of interactions between several environmental factors such as the physicochemical properties of an environment and metal speciation [1,10,27].…”

Section: Discussionmentioning

confidence: 99%

“…Features and characteristics such as the ability to bioaccumulate pollutants in high concentrations, importance in the food chain, abundance in an environment and widespread and easy identification made seagrasses suitable for use as good bioindicators [12]. The employment of seagrasses for assessment of heavy metals concentrations in components of the marine ecosystem is linked with the major routes of metal uptake as seawater/sediment to leaf/root pathways [13].…”

Section: Of 13mentioning

confidence: 99%

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Heavy Metal Accumulation and Anti-Oxidative Feedback as a Biomarker in Seagrass Cymodocea serrulata

Aljahdali

Alhassan

2020

Sustainability

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The pursuit of a good candidate to biomonitor environmental pollutants has been on the increase. In this study, the concentrations of Fe, Mn, Cu, Zn, Cd, Cr, Pb and Ni in sediment, seawater and seagrass Cymodocea serrulata compartments and antioxidant enzymes activities in C. serrulata were determined. Our results revealed that bioconcentration factors for all the metals were less than 1 (BCF < 1) and concentrations in seagrass compartments were in the order root > leaf > rhizome for Fe and Mn, leaf > root > rhizome for Cu, Zn, Pb and Ni, and root > rhizome > leaf for Cd and Cr. Effect range low concentrations (ER-L) revealed that Cu, Zn, Cd, Pb and Ni concentrations were above ER-L values and Cr concentration was below ER-L values while concentrations in seawater for all the heavy metals were above the estimate average element concentrations in seawater (ECS). Significant variation (p < 0.05) was recorded for heavy metals in sediment, seawater, seagrass compartments and heavy metal concentrations across stations. Influence of heavy metals on antioxidant enzymes activities; catalase (CAT), superoxide dismutase (SOD), glutathione S-transferase (GST) and acetylcholinesterase (AChE) were recorded, and high activities of the antioxidants were recorded in station S8 corresponding to high concentrations of heavy metals in the same station. There is a need for the promotion of biomonitoring networks across the marine environment using C. serrulata and antioxidant enzymes as biomarkers of oxidative stress caused by environmental pollutants.

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Section: Discussionmentioning

confidence: 99%

Section: Of 13mentioning

confidence: 99%

Heavy Metal Accumulation and Anti-Oxidative Feedback as a Biomarker in Seagrass Cymodocea serrulata

Aljahdali

Alhassan

2020

Sustainability

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“…The persistent ability of trace elements such as Pb, Cd, Cr, Cu, Zn, and Ni in an environment is a key difference between them and organic pollutants such as pyrethroids and organophosphates (Aljahdali and Alhassan 2020a). This makes them have a high potential to bioaccumulate from sediment or water up the trophic levels (Roberts et al 2008;Malea et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Naturally, trace elements exist in an environment at a minimal concentration with no significant negative effect on biodiversity (Aljahdali and Alhassan 2020b;Boutahar et al 2021). Trace elements such as Co, Cr, Cu, Fe, Mn, and Zn support plant metabolism and are essential micronutrients, while others such as Pb and Cd are very toxic to organisms even in minimal or low concentrations (Malea et al 2019;Goretti et al 2020). However, humans' different management and use of the environment, such as processes in industrialization, has caused the rise in concentrations of trace elements in the natural environment (Aljahdali and Alhassan 2020b;Boutahar et al 2021;Singh et al 2021).…”

Section: Introductionmentioning

confidence: 99%

The efficiency of trace element uptake by seagrass Cymodocea serrulata in Rabigh lagoon, Red Sea

Aljahdali

Alhassan

2021

Environ Sci Pollut Res

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The search for solutions to environmental pollution has been on the increase, with many questions recently as to which marine organisms can bioaccumulate trace elements in the marine ecosystem. Cadmium, Cr, Cu, Fe, Mn, Ni, Pb, and Zn concentrations in sediment, seawater, and seagrass compartments (root, rhizome, and leaf blade) were determined at Rabigh lagoon, Red Sea. This is to provide an insight into the potential of Cymodocea serrulata to bioaccumulate trace elements and as a good candidate to biomonitor these elements in a natural aquatic ecosystem. Results revealed significant variations in trace element concentrations across the three compartments of C. serrulata and the sites, with site S8 located in the most closed part of the lagoon recording the highest concentrations for all the trace elements. The translocation factor (TF rhizome/root = 1.00) of trace elements was higher in the root compartment. This implies that the root compartment is a better bioindicator of trace elements and has more potential to be utilized for biomonitoring. A significant positive correlation (p < 0.01) was established between the trace element concentrations in sediment, seawater, and the three compartments of C. serrulata except for Mn concentration in the compartments. The seagrass C. serrulata can be used for biomonitoring of trace elements in marine ecosystems as our results provide information on its capacity to bioaccumulate these elements. This is one of the key characteristics of a typical bioindicator of aquatic pollutants.

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“…Moreover, once C org is buried in the soil, biotic and abiotic factors are likely to control the degree of C org accumulation and preservation (Mateo et al, 2006). These factors include the rates of sediment accumulation, sediment grain-size, and biochemical composition of the organic matter (Keil and Hedges, 1993;Torbatinejad et al, 2007;Serrano et al, 2016a), and also vary among seagrass meadows (De Falco et al, 2000;Kennedy et al, 2010). As such, considerable variation exists in the estimates of C org storage in seagrass soils worldwide (ranging from 4.2 to 8.4 Pg C org ; Fourqurean et al, 2012a) and for any given location (Lavery et al, 2013;Campbell et al, 2015;Röhr et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Contribution of Seagrass Blue Carbon Toward Carbon Neutral Policies in a Touristic and Environmentally-Friendly Island

et al. 2020

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Estimates of organic carbon (C org) storage by seagrass meadows which consider interhabitat variability are essential to understand their potential to sequester carbon dioxide (CO 2) and derive robust global and regional estimates of blue carbon storage. In this study, we provide baseline estimates of seagrass extent, and soil C org stocks and accumulation rates from different seagrass habitats at Rottnest Island (in Amphibolis spp., Posidonia spp., Halophila ovalis, and mixed Posidonia/Amphibolis spp. meadows). The C org stocks in 0.5 m thick seagrass soil deposits, derived from 24 cores, were 5.1 ± 0.7 kg C org m −2 (mean ± SE, ranging from 0.05 to 12.9 kg C org m −2), accumulating at 23.2 ± 3.2 g C org m −2 year −1 (ranging from 0.22 to 58.9 g C org m −2 year −1) over the last decades. There were significant differences in C org content (%) and stocks (mg C org cm −3), stable carbon isotope composition of the soil organic matter (δ 13 C), and soil grain size among the seagrass meadows studied, highlighting that biotic and abiotic factors influence seagrass soil C org storage. Mixed meadows of Posidonia/Amphibolis spp. and monospecific meadows of Posidonia spp. and Amphibolis spp. had the highest C org stocks (ranging from 6.2 to 6.4 kg C org m −2), while Halophila spp. meadows had the lowest C org stocks (1.2 ± 0.6 kg C org m −2). We estimated a total soil C org stock of 48.1 ± 8.5 Gg C org beneath the 755 ha of Rottnest Island's seagrasses, and a C org sequestration capacity of 0.81 ± 0.06 Gg C org year −1 , which is equivalent to the sequestration of ∼22% of the island's current annual CO 2 emissions. Our results contribute to the existing global dataset on seagrass soil C org storage and show a significant potential of seagrass to sequester CO 2 , which are particularly relevant in the context of achieving carbon neutrality through conservation actions in environmentally-marketed, tourist destinations such as Rottnest Island.

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Trace elements in the seagrass Posidonia oceanica: Compartmentation and relationships with seawater and sediment concentrations

Cited by 22 publications

References 53 publications

Heavy Metal Accumulation and Anti-Oxidative Feedback as a Biomarker in Seagrass Cymodocea serrulata

Heavy Metal Accumulation and Anti-Oxidative Feedback as a Biomarker in Seagrass Cymodocea serrulata

The efficiency of trace element uptake by seagrass Cymodocea serrulata in Rabigh lagoon, Red Sea

Contribution of Seagrass Blue Carbon Toward Carbon Neutral Policies in a Touristic and Environmentally-Friendly Island

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