indirectly provides oxygen, a byproduct of photosynthesis, which aerobic chemosynthetic microorganisms require to synthesize organic carbon from CO2. Planktonic life stages of many vent and cold seep invertebrates also directly feed on photosynthetically produced organic matter as they disperse to new vent and seep systems. While a large portion of the life at deep-sea chemosynthetic habitats c...

We used high-resolution imagery within a Geographic Information System (GIS), free gas and porewater analyses animal bulk stable isotope measurements to characterize the biotic abiotic aspects of newly discovered Vestbrona Carbonate Field (VCF) seep site on Norwegian shelf (63°28′N, 6° 31′E, ∿270 m water depth). Free was mainly composed microbial methane. Sediment sulfide concentrations were in...

This report investigates the costs and benefits associated with the conversion from semi-enclosed seep irrigation to either automated seep or automated sub-drip irrigation for potato production in Northeast Florida. These costs and benefits are estimated at the level of the individual grower and for the public at large. The analytical tools in the report include financial budgeting and regressi...

Sulfate-dependent anaerobic oxidation of methane (AOM) is the key sedimentary microbial process limiting methane emissions from marine sediments and methane seeps. In this study, we investigate how the presence of low-organic content sediment influences the capacity and efficiency of AOM at Bullseye vent, a gas hydrate-bearing cold seep offshore of Vancouver Island, Canada. The upper 8 m of sed...

The fauna, community composition, and trophic support of the newly discovered Concepción Methane Seep Area (CMSA) are compared with those at a nearby non-seep control. The assemblage of chemosymbiotic bivalves is defined by eight species, including the families Lucinidae, Thyasiridae, Solemyidae, and Vesicomyidae. Seep polychaetes are represented by Lamellibrachia sp. and two commensal species ...

Abstract Cold seeps represent hot spots of seabed‐derived methane emissions to the water column, where physical and biological barriers regulate transport atmosphere. In our study, we used a point source in North Sea investigate water‐column dynamics within dispersing plumes. The study is based on concentration, distribution activity methane‐oxidizing bacteria (MOB), oceanographic observations....

Like hydrothermal vents along oceanic ridges, cold seeps are patchy and isolated ecosystems along continental margins, extending from bathyal to abyssal depths. The Atlantic Equatorial Belt (AEB), from the Gulf of Mexico to the Gulf of Guinea, was one focus of the Census of Marine Life ChEss (Chemosynthetic Ecosystems) program to study biogeography of seep and vent fauna. We present a review an...

Methane is the second most important greenhouse gas contributing to climate warming. The open ocean is a minor source of methane to the atmosphere. We report intense methane emissions from the near-shore southern region of the North Sea characterized by the presence of extensive areas with gassy sediments. The average flux intensities (~130 μmol m(-2) d(-1)) are one order of magnitude higher th...

Seafloor authigenic carbonate crusts are widespread in various oceanic and marine settings, excluding high-latitude basins that corrosive to precipitation. Newly formed formations relatively rare modern Arctic sediments. Although the first-order principles of seep formation currently quite well constrained, little is known regarding duration or mode Siberian shelf. Large (massive slabs blocks) ...