Heavy metals in sediments and soft tissues of the Antarctic clam Laternula elliptica: More evidence as a ? possible biomonitor of coastal marine pollution at high latitudes?

Vodopívez, Cristian; Curtosi, Antonio; Villaamil, Edda C.; Smichowski, Patricia; Pelletier, Émilien; Cormack, Walter P. Mac

doi:10.1016/j.scitotenv.2014.09.031

Cited by 39 publications

(28 citation statements)

References 34 publications

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“…Marine pollution studies have assessed sewage outfalls from stations [e.g., ( 218 )], heavy metal concentrations [e.g., ( 204 , 205 , 219 )], and used animals as monitors for pollutants [e.g., ( 220 , 221 )]. Humans have also acted as vectors for disease transmission in marine wildlife [e.g., ( 222 )].…”

Section: Direct Human Impactsmentioning

confidence: 99%

Antarctic environmental change and biological responses

2019

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Antarctica and the surrounding Southern Ocean are facing complex environmental change. Their native biota has adapted to the region's extreme conditions over many millions of years. This unique biota is now challenged by environmental change and the direct impacts of human activity. The terrestrial biota is characterized by considerable physiological and ecological flexibility and is expected to show increases in productivity, population sizes and ranges of individual species, and community complexity. However, the establishment of non-native organisms in both terrestrial and marine ecosystems may present an even greater threat than climate change itself. In the marine environment, much more limited response flexibility means that even small levels of warming are threatening. Changing sea ice has large impacts on ecosystem processes, while ocean acidification and coastal freshening are expected to have major impacts.

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Section: Direct Human Impactsmentioning

confidence: 99%

Antarctic environmental change and biological responses

2019

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“…Using publicly available data (Curtosi et al 2010;Guerra et al 2011;Lee et al 2012;Laluraj et al 2014;Vodopivez et al 2014;Grotti et al 2015;Kim et al 2015), we compared the concentrations of eight heavy metals (As, Cd, Co, Cr, Cu, Hg, Ni, and Zn) in 15 samples originating from different Antarctic regions (including five soil samples, eight marine/surface sediments samples and two snow/ice samples). Seven samples originated from King George Island.…”

Section: Chemical Characterization Of the Sampling Sitesmentioning

confidence: 99%

Insight into heavy metal resistome of soil psychrotolerant bacteria originating from King George Island (Antarctica)

et al. 2018

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The presence of heavy metals in Antarctica is an emerging issue, especially as (bio)weathering of metal-containing minerals occurs and human influence is more and more visible in this region. Chemical analysis of three soil samples collected from the remote regions of King George Island (Antarctica) revealed the presence of heavy metals (mainly copper, mercury, and zinc) at relatively high concentrations. Physiological characterization of over 200 heavy metal-resistant, psychrotolerant bacterial strains isolated from the Antarctic soil samples was performed. This enabled an insight into the heavy metal resistome of these cultivable bacteria and revealed the prevalence of co-resistance phenotypes. All bacteria identified in this study were screened for the presence of selected heavy metal-resistance genes, which resulted in identification of arsB (25), copA (3), czcA (33), and merA (26) genes in 62 strains. Comparative analysis of their nucleotide sequences provided an insight into the diversity of heavy metal-resistance genes in Antarctic bacteria.

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“…[13]. For example, a recent metal analysis of tissues from the Antarctic clam (Laternula elliptica) showed high Pb levels nearby an Antarctic research station [17]. In previous studies, Antarctica seawater showed elevated concentrations of lead in values between 0.05 to 0.06 µgL -1 , including places near the meltwater input source [10,22,23].…”

Section: Introductionmentioning

confidence: 98%

“…The relatively high concentrations of the metals Al, Co, Ni, Cu, Zn, Cd, Pb, Mn, Fe, As and Se in Antarctic waters have been attributed to water input from progressive deglaciation, soil composition, weathering of volcanic lithogenic rock and atmospheric deposition [9][10][11][12][13]. In addition, the natural background levels of trace metals have been elevated since the establishment of bases on the Antarctic continent [14][15][16][17]. During the austral summer the circumpolar vortex disappears and long-term records of mineral dust, black carbon and Pb in the South Pole and several coastal Antarctic stations indicate a greater transport of air masses poleward [18].…”

Section: Introductionmentioning

confidence: 99%

Time course of lead induced proteomic changes in gill of the Antarctic limpet Nacella Concinna (Gastropoda: Patellidae)

Piechnik

Höckner

Souza

et al. 2017

Journal of Proteomics

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Proteomic analysis of gill tissue in Antarctic limpets exposed to different concentrations of lead (Pb) over a 168 h time period showed that proteomic changes vary with time. These changes included an increase in the demand of scavenging reactive oxygen species, acid-base balance and a challenge to protein homeostasis in the endoplasmic reticulum early on and subsequently an increase in energy metabolism, cellular signaling, and cytoskeletal modifications. Based on this time course, we hypothesize that the main mode of action of lead is a replacement of metal-cofactors of key enzymes involved in the scavenging of reactive oxygen species and the regulation of acid-base balance.

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Heavy metals in sediments and soft tissues of the Antarctic clam Laternula elliptica: More evidence as a ? possible biomonitor of coastal marine pollution at high latitudes?

Cited by 39 publications

References 34 publications

Antarctic environmental change and biological responses

Antarctic environmental change and biological responses

Insight into heavy metal resistome of soil psychrotolerant bacteria originating from King George Island (Antarctica)

Time course of lead induced proteomic changes in gill of the Antarctic limpet Nacella Concinna (Gastropoda: Patellidae)

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