Zobrazeno 1 - 9
of 9
pro vyhledávání: '"M Elizabeth Holmes"'
Autor:
Ruth K, Varner, Patrick M, Crill, Steve, Frolking, Carmody K, McCalley, Sophia A, Burke, Jeffrey P, Chanton, M Elizabeth, Holmes, Scott, Saleska, Michael W, Palace
Publikováno v:
Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
Permafrost thaw increases active layer thickness, changes landscape hydrology and influences vegetation species composition. These changes alter belowground microbial and geochemical processes, affecting production, consumption and net emission rates
Publikováno v:
Applied and Environmental Microbiology. 81:7431-7442
To gain insight into the mechanisms controlling methanogenic pathways in the Florida Everglades, the distribution and functional activities of methanogens and sulfate-reducing prokaryotes (SRPs) were investigated in soils (0 to 2 or 0 to 4 cm depth)
Publikováno v:
Journal of Geophysical Research: Biogeosciences. 119:1267-1280
Water Conservation Area 2A in the Florida Everglades is characterized by a nutrient gradient with high levels in the north from agricultural runoff and more oligotrophic conditions in the southern interior. Based on laboratory incubations and field s
Publikováno v:
Geochemistry, Geophysics, Geosystems. 14:2445-2459
[1] To assess the temporal variability in the methane fluxes from marine sediments that overly gas hydrate bearing sediments and the factors that might control its rate, in situ methane concentrations were measured near Bullseye Vent on the Northern
Publikováno v:
Deep Sea Research Part I: Oceanographic Research Papers. 49:377-394
Temporal changes in δ 15 N values of sinking particles collected with sediment traps in the Benguela upwelling regime off southwest Africa mirrored variations in the input of inorganic nitrogen to the surface water. Reductions in δ 15 N (to as low
Publikováno v:
Global Biogeochemical Cycles. 14:1-10
The concentration of methane and its isotopic composition did not appear to vary significantly in the subtropical North Pacific during 1996-1997. Methane enters the atmos- phere via the upper mixed layer at a rate of 1.6 gmol m '2 d ' (_+ 0.1) with
Publikováno v:
Global Biogeochemical Cycles. 13:463-474
Mixing diagrams of methane (CH4) concentration and stable isotopic ratio (δ13C-CH4) were used to examine the fate of river-borne CH4 as it crosses a variety of estuaries: Columbia River (Oregon/Washington), Parker River (Massachusetts), Great Bay (N
Publikováno v:
Paleoceanography. 12:604-614
The δ15N records of two sediment cores from the Angola Basin have been used to investigate past changes in nutrient utilization in the surface waters of this highly productive region. Low 15N/14N ratios in the cores (from >3000 m water depth) genera
Autor:
Peter J Müller, Ralph R Schneider, Jürgen Pätzold, Gerold Wefer, Monika Segl, M Elizabeth Holmes
Publikováno v:
Marine Geology. 134:1-12
Sedimentary δ15N contains a record of biogeochemical processes occurring in the water column. Stable nitrogen isotopes were measured in the bulk sedimentary matter of 18 surface sediment samples collected in three transects in the eastern Angola Bas