Low-dose addition of silver nanoparticles stresses marine plankton communities

Tsiola, Anastasia; Toncelli, Claudio; Fodelianakis, Stilianos; Michoud, Grégoire; Bucheli, Thomas D.; Gavriilidou, Asimenia; Kagiorgi, Margarita; Kalantzi, Ioanna; Knauer, Katja; Kotoulas, Georgios; Mylona, Kyriaki; Papadopoulou, Eleftheria; Psarra, Stella; Santi, Ioulia; Tsapakis, Manolis; Daffonchio, Daniele; Pergantis, Spiros A.; Pitta, Paraskevi

doi:10.1039/c8en00195b

Cited by 17 publications

(32 citation statements)

References 79 publications

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“…DIN concentrations were higher but still indicative of oligotrophic conditions. These concentrations were expected for a coastal site of the Sea of Crete (Tsiola et al 2018). The phytoplankton bloom lasted 2-3 days, similar to other mesocosm experiments performed at the same time of the year and in the same study area in both natural and induced bloom conditions , Tsiola et al 2018 (figure 1).…”

Section: Resultssupporting

confidence: 87%

“…These concentrations were expected for a coastal site of the Sea of Crete (Tsiola et al 2018). The phytoplankton bloom lasted 2-3 days, similar to other mesocosm experiments performed at the same time of the year and in the same study area in both natural and induced bloom conditions , Tsiola et al 2018 (figure 1). The concentrations of phosphate and DIN reached a minimum on day 3 and slightly increased again after day 4, remaining low throughout the experiment and with no evident differences between controls and MP treatments.…”

Section: Resultssupporting

confidence: 87%

“…Samples for Synechococcus and autotrophic picoeukaryotes were not fixed and analyzed without prior staining, based on their autofluorescence signals. A FACSCalibur TM flow cytometer (Becton Dickinson) was used (Tsiola et al 2018). To estimate the carbon contribution by both picoeukaryotes and Synechococcus, we used values of 471 fg C cell −1 (picoeukaryotes) and 151 fg C cell −1 (Synechococcus) according to Lagaria et al (2017), which were applied for the same study area in a similar set up.…”

Section: Heterotrophic and Autotrophic Organismsmentioning

confidence: 99%

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Microplastics increase the marine production of particulate forms of organic matter

Galgani

Tsapakis

Pitta

et al. 2019

Environ. Res. Lett.

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Microplastics are a major environmental challenge, being ubiquitous and persistent as to represent a new component in all marine environments. As any biogenic particle, microplastics provide surfaces for microbial growth and biofilm production, which largely consists of carbohydrates and proteins. Biofilms influence microbial activity and modify particle buoyancy, and therefore control the fate of microplastics at sea. In a simulated 'plastic ocean', three mesocosms containing oligotrophic seawater were amended with polystyrene microbeads and compared to three control mesocosms. The evolution of organic matter, microbial communities and nutrient concentrations was monitored over 12 days. The results indicated that microplastics increased the production of organic carbon and its aggregation into gel particulates. The observed increase of gel-like organics has implications on the marine biological pump as well as the transport of microplastics in the ocean.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 87%

Section: Heterotrophic and Autotrophic Organismsmentioning

confidence: 99%

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Microplastics increase the marine production of particulate forms of organic matter

Galgani

Tsapakis

Pitta

et al. 2019

Environ. Res. Lett.

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“…For the amplification of 16S rRNA gene, polymerase chain reactions were carried out using the locus-specific primers (341f: 5′-CCTACGGGNGGCWGCAG-3′ and 806RB: 5′- GGACTACNVGGGTWTCTAAT -3′, [ 30 , 31 ]) and a universal 5′ tail specified by Illumina ( Supplementary Information ). Virome reads in FASTQ format were treated as in [ 32 ] with modifications in the assembled-contig analysis. The assembled viral contigs were deposited on the zenodo server (doi: 10.5281/zenodo.3929111), and both 16S data and whole viromes were deposited at the National Center for Biotechnology Information (NCBI) BioSample database (accession numbers can be found in Table S1 ).…”

Section: Methodsmentioning

confidence: 99%

Viral Metagenomic Content Reflects Seawater Ecological Quality in the Coastal Zone

Tsiola

Michoud

Fodelianakis

et al. 2020

Viruses

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Viruses interfere with their host’s metabolism through the expression of auxiliary metabolic genes (AMGs) that, until now, are mostly studied under large physicochemical gradients. Here, we focus on coastal marine ecosystems and we sequence the viral metagenome (virome) of samples with discrete levels of human-driven disturbances. We aim to describe the relevance of viromics with respect to ecological quality status, defined by the classic seawater trophic index (TRIX). Neither viral (family level) nor bacterial (family level, based on 16S rRNA sequencing) community structure correlated with TRIX. AMGs involved in the Calvin and tricarboxylic acid cycles were found at stations with poor ecological quality, supporting viral lysis by modifying the host’s energy supply. AMGs involved in “non-traditional” energy-production pathways (3HP, sulfur oxidation) were found irrespective of ecological quality, highlighting the importance of recognizing the prevalent metabolic paths and their intermediate byproducts. Various AMGs explained the variability between stations with poor vs. good ecological quality. Our study confirms the pivotal role of the virome content in ecosystem functioning, acting as a “pool” of available functions that may be transferred to the hosts. Further, it suggests that AMGs could be used as an ultra-sensitive metric of energy-production pathways with relevance in the vulnerable coastal zone and its ecological quality.

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“…Nanoparticles are a facet of this issue, the environmental impacts of which have received research interest only in recent years. Especially silver nanoparticles, which are finding increasingly wide applications from water treatment to textiles, have been found to impact plankton communities at all levels -including severe growth inhibition of cyanobacteria and eukaryotic phytoplankton, and significant changes of bacterial community composition (Burchardt et al 2012, Doiron et al 2012, Bielmyer-Fraser et al 2014, Das et al 2014, Baptista et al 2015, Tsiola et al 2018.…”

Section: Plastic and Nanoparticle Pollutionmentioning

confidence: 99%

The future of marine biodiversity and marine ecosystem functioning in UK coastal and territorial waters (including UK Overseas Territories) – with an emphasis on marine macrophyte communities

Küpper

Kamenos

2018

Botanica Marina

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Marine biodiversity and ecosystem functioning – including seaweed communities – in the territorial waters of the UK and its Overseas Territories are facing unprecedented pressures. Key stressors are changes in ecosystem functioning due to biodiversity loss caused by ocean warming (species replacement and migration, e.g. affecting kelp forests), sea level rise (e.g. loss of habitats including salt marshes), plastic pollution (e.g. entanglement and ingestion), alien species with increasing numbers of alien seaweeds (e.g. outcompeting native species and parasite transmission), overexploitation (e.g. loss of energy supply further up the food web), habitat destruction (e.g. loss of nursery areas for commercially important species) and ocean acidification (e.g. skeletal weakening of ecosystem engineers including coralline algal beds). These stressors are currently affecting biodiversity, and their impact can be projected for the future. All stressors may act alone or in synergy. Marine biodiversity provides crucial goods and services. Climate change and biodiversity loss pose new challenges for legislation. In particular, there are implications of climate change for the designation and management of Marine Protected Areas and natural carbon storage by marine systems to help control the global climate system. The UK currently has legal obligations to protect biodiversity under international and European law.

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Low-dose addition of silver nanoparticles stresses marine plankton communities

Abstract: The release of silver nanoparticles (AgNPs) is expected to rise in the near future, with possible negative effects on aquatic life and enhancement of microbial resistance against AgNPs.

Cited by 17 publications

References 79 publications

Microplastics increase the marine production of particulate forms of organic matter

Microplastics increase the marine production of particulate forms of organic matter

Viral Metagenomic Content Reflects Seawater Ecological Quality in the Coastal Zone

The future of marine biodiversity and marine ecosystem functioning in UK coastal and territorial waters (including UK Overseas Territories) – with an emphasis on marine macrophyte communities

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