Anthropogenic dissolved organic carbon and marine microbiomes

Vila‐Costa, Maria; Cerro‐Gálvez, Elena; Martinez-Varela, Alícia; Casas, Gemma; Dachs, Jordi

doi:10.1038/s41396-020-0712-5

Cited by 39 publications

(41 citation statements)

References 13 publications

(19 reference statements)

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“…The diffusive atmosphere-ocean exchange and snow deposition are the main sources of not only semivolatile OP, such as Polycyclic Aromatic Hydrocarbons (PAH) and polychlorinated biphenyls ( Galbán-Malagón et al, 2013 ; Casal et al, 2018,2019 ), but also other hydrophobic and surfactant-like OPs such as perfluoroalkylsubstances ( Casal et al, 2017 ). All these OP become part of the anthropogenic dissolved organic carbon (ADOC) ( Vila-Costa et al, 2020 ) pool, which due to its hydrophobic and surfactant-like properties is enriched in the SML ( Cincinelli et al, 2005 ; Stortini et al, 2009 ; Casas et al, 2020 ). The accumulation of ADOC and other surfactant-like organic matter is driven by rising bubbles with chemicals accumulated at the air-water interface and by ADOC attachment to buoyant particles from subsurface waters ( Hunter, 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica)

et al. 2020

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The composition of bacteria inhabiting the sea-surface microlayer (SML) is poorly characterized globally and yet undescribed for the Southern Ocean, despite their relevance for the biogeochemistry of the surface ocean. We report the abundances and diversity of bacteria inhabiting the SML and the subsurface waters (SSL) determined from a unique sample set from a polar coastal ecosystem (Livingston Island, Antarctica). From early to late austral summer (January-March 2018), we consistently found a higher abundance of bacteria in the SML than in the SSL. The SML was enriched in some Gammaproteobacteria genus such as Pseudoalteromonas, Pseudomonas, and Colwellia, known to degrade a wide range of semivolatile, hydrophobic, and surfactant-like organic pollutants. Hydrocarbons and other synthetic chemicals including surfactants, such as perfluoroalkyl substances (PFAS), reach remote marine environments by atmospheric transport and deposition and by oceanic currents, and are known to accumulate in the SML. Relative abundances of specific SMLenriched bacterial groups were significantly correlated to concentrations of PFASs, taken as a proxy of hydrophobic anthropogenic pollutants present in the SML and its stability. Our observations provide evidence for an important pollutant-bacteria interaction in the marine SML. Given that pollutant emissions have increased during the Anthropocene, our results point to the need to assess chemical pollution as a factor modulating marine microbiomes in the contemporaneous and future oceans.

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Section: Introductionmentioning

confidence: 99%

Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica)

et al. 2020

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“…The water was pre‐filtered on a pre‐combusted glass fibre filter (GF/F, Whatmann) and then eluted and concentrated on a XAD‐2 (polystyrene copolymer resin) absorbent column. Analyses were performed following the procedures described elsewhere (Berrojalbiz et al ., 2009; Fernández‐Pinos et al ., 2017; González‐Gaya et al ., 2019; Vila‐Costa et al ., 2020).…”

Section: Methodsmentioning

confidence: 99%

“…These thousands of synthetic organic compounds and hydrocarbons compose the anthropogenic dissolved organic carbon (ADOC) (Vila‐Costa et al ., 2020). Individual ADOC compounds are found at concentrations from the pico‐ to the nano‐ molar range, but the combined co‐occurrence of thousands of different anthropogenic compounds can reach micromolar concentrations (Dachs and Méjanelle, 2010; González‐Gaya et al ., 2016; Vila‐Costa et al ., 2020). ADOC contributes to oceanic dissolved organic matter budgets.…”

Section: Introductionmentioning

confidence: 99%

Bacterial responses to background organic pollutants in the northeast subarctic Pacific Ocean

Martinez-Varela

Cerro‐Gálvez

Auladell

et al. 2021

Environmental Microbiology

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Thousands of man-made synthetic chemicals are released to oceans and compose the anthropogenic dissolved organic carbon (ADOC). Little is known about the effects of this chronic pollution on marine microbiome activities. In this study, we measured the pollution level at three sites in the Northeast Subarctic Pacific Ocean (NESAP) and investigated how mixtures of three model families of ADOC at different environmentally relevant concentrations affected naturally occurring marine bacterioplankton communities' structure and metabolic functioning. The offshore northernmost site (North) had the lowest concentrations of hydrocarbons, as well as organophosphate ester plasticizers, contrasting with the two other continental shelf sites, the southern coastal site (South) being the most contaminated. At North, ADOC stimulated bacterial growth and promoted an increase in the contribution of some Gammaproteobacteria groups (e.g. Alteromonadales) to the 16 rRNA pool. These groups are described as fast responders after oil spills. In contrast, minor changes in South microbiome activities were observed. Gene expression profiles at Central showed the coexistence of ADOC degradation and stress-response strategies to cope with ADOC toxicities. These results show that marine microbial communities at three distinct domains in NESAP are influenced by background concentrations of ADOC, expanding previous assessments for polar and temperate waters.

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“…Observed ecotoxicological effects of organic contaminants affecting health and reproduction in various species indicate that future changes in environmental concentrations can affect food web composition and biodiversity in the Baltic Sea (Sonne et al, 2020). Although considerably less studied, it has in recent years been shown 2070 that organic contaminants can modulate microbial communities' composition and functioning, and potentially also biogeochemical processes of importance to Earth system functioning (Vila-Costa et al, 2020).…”

Section: Chemical Contaminants (With An Emphasis On Organic Contaminants)mentioning

confidence: 99%

Human impacts and their interactions in the Baltic Sea region

Reckermann

Omstedt

Soomere

et al. 2021

Preprint

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Abstract. Coastal environments, in particular heavily populated semi-enclosed marginal seas and coasts like the Baltic Sea region, are stongly affected by human activities. A multitude of human impacts, including climate change, affects the different compartments of the environment, and these effects interact with each other. As part of the Baltic Earth Assessment Reports (BEAR), we present an inventory and discussion of different human-induced factors and processes affecting the environment of the Baltic Sea region, and their interrelations. Some are naturally occurring and modified by human activities (i.e. climate change, coastal processes, hypoxia, acidification, submarine groundwater discharges, marine ecosystems, non-indigenous species, land use and land cover), some are completely human-induced (i.e. agriculture, aquaculture, fisheries, river regulations, offshore wind farms, shipping, chemical contamination, dumped warfare agents, marine litter and microplastics, tourism, coastal management), and they are all interrelated to different degrees. We present a general description and analysis of the state of knowledge on these interrelations. Our main insight is that climate change has an overarching, integrating impact on all of the other factors and can be interpreted as a background effect, which has different implications for the other factors. Impacts on the environment and the human sphere can be roughly allocated to anthropogenic drivers such as food production, energy production, transport, industry and economy. We conclude that a sound management and regulation of human activities must be implemented in order to use and keep the environments and ecosystems of the Baltic Sea region sustainably in a good shape. This must balance the human needs, which exert tremendous pressures on the systems, as humans are the overwhelming driving force for almost all changes we see. The findings from this inventory of available information and analysis of the different factors and their interactions in the Baltic Sea region can largely be transferred to other comparable marginal and coastal seas in the world.

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Anthropogenic dissolved organic carbon and marine microbiomes

Abstract: Human activity dramatically changes the chemosphere through contribution of synthetic compounds as well as unnatural mobilization processes such as industrial scale hydrocarbon extraction, combustion and agriculture. Millions of man-made chemicals have been synthesized, of

Cited by 39 publications

References 13 publications

Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica)

Large Enrichment of Anthropogenic Organic Matter Degrading Bacteria in the Sea-Surface Microlayer at Coastal Livingston Island (Antarctica)

Bacterial responses to background organic pollutants in the northeast subarctic Pacific Ocean

Human impacts and their interactions in the Baltic Sea region

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