The priming effect (PE) is a complex phenomenon which describes modification (acceleration or retardation) in the mineralisation rate of refractory organic matter (OM) following inputs labile material. PEs are well-studied terrestrial ecosystems owing to their potential importance evolution soil carbon stocks but have been largely ignored aquatic systems despite fact that prerequisite for occurrence, i.e. co-existence and OM, also true sediments. We conducted stable isotope tracer...

The aim of this study was the baseline description oil-degrading sediment bacteria along a depth transect in Faroe-Shetland Channel (FSC) and identification biomarker taxa for detection oil contamination FSC sediments.

Abstract The microbial degradation of petroleum hydrocarbons at low temperatures was investigated in subarctic deep-sea sediments the Faroe Shetland Channel (FSC). effect marine oil dispersant, Superdispersant 25 on hydrocarbon also examined. Sediments collected 500 and 1000 m depth were spiked with a model containing 20 incubated ambient temperature (5 0 °C, respectively) without dispersant. Treatment resulted enrichment Gammaproteobacteria , specifically genera Pseudoalteromonas...

More than 50% of terrestrially-derived organic carbon (terrOC) flux from the continents to ocean is remineralised in coastal zone despite its perceived high refractivity. The efficient degradation terrOC marine environment could be fuelled by labile marine-derived material, a phenomenon known as “priming effect”, but experimental data confirm this mechanism are lacking. We tested hypothesis treating sediments with 13C-lignocellulose, proxy for terrOC, and without addition unlabelled diatom...

Oil reserves in deep-sea sediments are currently subject to intense exploration, with associated risks of oil spills. Previous research suggests that microbial communities from sediment (>1000m) can degrade hydrocarbons (HCs), but have a lower degradation ability than shallow (<200m) communities, probably due situ temperature. This study aimed assess the effect marine origin on HC potential while separating influence temperature, and characterise HC-degrading bacterial communities. Microbial...

Deep sea oil exploration is increasing and presents environmental challenges for deep ocean ecosystems. Marine spills often result in contamination of sediments with oil; following the Deepwater Horizon (DwH) disaster up to 31% released entrained water column was deposited as oily residues on seabed. Although aftermath DwH studied intensely, lessons learned may not be directly transferable other deep-sea hydrocarbon areas, such Faroe-Shetland Channel (FSC) which comprises cold temperatures a...

Abstract The Hatton–Rockall Basin (North‐East Atlantic) is an area with potential for deep‐sea (2,900 m) hydrocarbon exploration. Following the Deepwater Horizon oil spill, many investigations into responses of sediment microbial communities to pollution have been undertaken. However, hydrostatic pressure a parameter that often omitted due technical difficulties associated conducting experiments at high (&gt;10 MPa). In this study, sediments from 2,900 m in Basin, following one‐week...

To achieve sustainable development, the energy transition from lignite burning to renewable resources for electric power generation is essential Greece. Wind and solar have emerged as significant sources in this transition. Surprisingly, numerous studies examined potential onshore wind based on land eligibility, while few open-field photovoltaic (PV) installations been conducted. Therefore, Specific Framework Spatial Planning Sustainable Development Renewable Energy Sources (SFSPSD-RES),...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 421:39-50 (2011) - DOI: https://doi.org/10.3354/meps08892 Processing of 13C-labelled diatoms by a bathyal community at sub-zero temperatures E. Gontikaki1,*, D. J. Mayor1, B. Thornton2, K. Black3, U. Witte1 1Oceanlab, Institute Biological and Environmental Sciences, University Aberdeen, AB41 6AA, UK 2Macaulay...

Abstract. Spatial distribution and patchiness of deep sea macrofaunal communities were studied from samples collected in the Rockall Trough, NE Atlantic. In June 2011, two areas, located outside within Darwin Mound Special Area Conservation (SAC), sampled. Three megacores deployed each area at approximately 900 m depth. The ~ 18 km apart, did not differ terms sediment organic matter percentage mud content, but small significant differences found median grain size Macrofaunal to...

The diversity and degradation capacity of hydrocarbon-degrading consortia from surface deep waters the Eastern Mediterranean Sea were studied in time-series experiments. Microcosms set up ONR7a medium at situ temperatures 25 °C 14 for Surface Deep consortia, respectively, crude oil as sole source carbon. consortium was additionally investigated to allow direct comparison rates consortium. In total, ~50% alkanes ~15% polycyclic aromatic hydrocarbons degraded all treatments by Day 24....

Two species of bivalves, Cerastoderma glaucum and Abra Ovata , typical inhabitants brackish waters, were found in Vouliagmeni Lagoon. Seasonal qualitative quantitative samples extracted from the different types substratum during 1997–1998. Overall, 800 individuals C. 2700 A. ovata collected measured their population structure studied.

The occurrence of priming effects on the degradation particulate terrestrial organic matter (13C-wheat detritus) was studied in marine sediments using phytoplankton detritus as inducer. Two scenarios, i.e. single-pulse vs. repetitive deposition same amounts algal detritus, were tested sediment core incubation experiments. In first case, a single pulse phytodetritus simulated emulated sudden large input phytoplanktonic material onto following decline spring blooms surface waters, whereas...

The response of a deep-water benthic microbial community to organic matter (OM) enrichment was studied in the unexplored region SW Cretan margin (E. Mediterranean). A food pulse 0.5 g C m−2 simulated by adding 13C-labelled diatoms sediment cores retrieved from 1079 m depth. diatom addition resulted significant increase oxygen consumption (SCOC). After 6 days, ∼50 mg added material processed community. major carbon sink respiration, which accounted for ∼96% total material. uptake rate (12...

Hydrocarbon biodegradation rates in the deep-sea have been largely determined under atmospheric pressure, which may lead to non-representative results. In this work, we aim study response of microbial communities Eastern Mediterranean Sea (EMS) oil contamination at situ environmental conditions and provide representative rates. Seawater from a 600 1000 m depth was collected using high-pressure (HP) sampling device equipped with unidirectional check-valve, without depressurization upon...

Abstract Understanding the diversity and dynamics of marine microbiota holds significant importance due to their role in maintaining vital ecosystem functions services including climate regulation bioremediation. Here, we studied associations between Bacteria unicellular eukaryotes different water masses Cretan Passage column Eastern Mediterranean Sea (EMS). Samples were collected from two stations Hellenic Exclusive Economic Zone (EEZ) at various depths down 1000 m during sampling...

Abstract. Over the past two decades, growing concerns have been raised regarding effects of towed fishing gears, such as trawls and dredges, on deep-sea biodiversity ecosystem functioning. Trawling disturbs benthic communities both physically biologically, can eliminate most vulnerable organisms modify habitat structure; chronically disturbed are often dominated by opportunistic species. The European Union is under obligation to designate a network offshore Special Areas Conservation (SACs)...

&amp;lt;p&amp;gt;Deep-sea oil releases from accidents during offshore exploratory drilling or production are of particular concern, as the potential for such increases with expansion industry to more extreme environments. During 2010 Deepwater Horizon, huge amounts were released into Gulf Mexico, adversely affecting marine wildlife. What prevented a worse outcome was ability nature biodegrade oil. &amp;amp;#160;&amp;lt;/p&amp;gt;&amp;lt;p&amp;gt;To this end, community oi spill model...