Search Results - "LOMAS, M. W"

Evidence for aggregation and export of cyanobacteria and nano-eukaryotes from the Sargasso Sea euphotic zone by Lomas, M. W., Moran, S. B.

“…Pico-plankton and nano-plankton are generally thought to represent a negligible fraction of the total particulate organic carbon (POC) export flux in…”
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Sargasso Sea phosphorus biogeochemistry: an important role for dissolved organic phosphorus (DOP) by Lomas, M. W., Burke, A. L., Lomas, D. A., Bell, D. W., Shen, C., Dyhrman, S. T., Ammerman, J. W.

“…Inorganic phosphorus (SRP) concentrations in the subtropical North Atlantic are some of the lowest in the global ocean and have been hypothesized to constrain…”
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C : N : P stoichiometry at the Bermuda Atlantic Time-series Study station in the North Atlantic Ocean by Singh, A., Baer, S. E., Riebesell, U., Martiny, A. C., Lomas, M. W.

“…Nitrogen (N) and phosphorus (P) availability, in addition to other macro- and micronutrients, determine the strength of the ocean's carbon (C) uptake, and…”
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Decoupling of net community and export production on submesoscales in the Sargasso Sea by Estapa, M. L., Siegel, D. A., Buesseler, K. O., Stanley, R. H. R., Lomas, M. W., Nelson, N. B.

“…Determinations of the net community production (NCP) in the upper ocean and the particle export production (EP) should balance over long time and large spatial…”
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Picophytoplankton biomass distribution in the global ocean by Buitenhuis, E. T, Li, W. K. W, Vaulot, D, Lomas, M. W, Landry, M. R, Partensky, F, Karl, D. M, Ulloa, O, Campbell, L, Jacquet, S, Lantoine, F, Chavez, F, Macias, D, Gosselin, M, McManus, G. B

“…The smallest marine phytoplankton, collectively termed picophytoplankton, have been routinely enumerated by flow cytometry since the late 1980s during cruises…”
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Increased ocean carbon export in the Sargasso Sea linked to climate variability is countered by its enhanced mesopelagic attenuation by Lomas, M. W., Steinberg, D. K., Dickey, T., Carlson, C. A., Nelson, N. B., Condon, R. H., Bates, N. R.

“…Photosynthetic CO2 uptake by oceanic phytoplankton and subsequent export of particulate organic carbon (POC) to the ocean interior comprises a globally…”
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Estimates of micro-, nano-, and picoplankton contributions to particle export in the northeast Pacific by Mackinson, B. L, Moran, S. B, Lomas, M. W, Stewart, G. M, Kelly, R. P

“…The contributions of micro-, nano-, and picoplankton to particle export were estimated from measurements of size-fractionated particulate 234Th, organic…”
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Phosphate supply explains variation in nucleic acid allocation but not C : P stoichiometry in the western North Atlantic by Zimmerman, A. E, Martiny, A. C, Lomas, M. W, Allison, S. D

“…Marine microbial communities mediate many biogeochemical transformations in the ocean. Consequently, processes such as primary production and carbon (C) export…”
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Seasonal distribution of dissolved inorganic carbon and net community production on the Bering Sea shelf by Mathis, J. T., Cross, J. N., Bates, N. R., Bradley Moran, S., Lomas, M. W., Mordy, C. W., Stabeno, P. J.

“…In order to assess the current state of net community production (NCP) in the southeastern Bering Sea, we measured the spatio-temporal distribution and…”
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Influence of nutrient utilization and remineralization stoichiometry on phytoplankton species and carbon export: A modeling study at BATS by Salihoglu, B., Garçon, V., Oschlies, A., Lomas, M.W.

“…The primary objective of this research is to understand the underlying mechanisms of the time-varying flux of carbon in the Sargasso Sea. To address this…”
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Nitrate reductase and urease enzyme activity in the marine diatom Thalassiosira weissflogii (Bacillariophyceae): interactions among nitrogen substrates by Lomas, M. W

“…The dissolved nitrogen pool in aquatic systems is comprised of many different nitrogen forms, both inorganic and organic. Interaction among these nitrogen…”
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Characterization of urease activity in three marine phytoplankton species, Aureococcus anophagefferens, Prorocentrum minimum, and Thalassiosira weissflogii by Fan, C, Glibert, P. M, Alexander, J, Lomas, M. W

“…The availability of different forms of nitrogen in coastal and estuarine waters may be important in determining the abundance and productivity of different…”
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Biogeochemical responses to late-winter storms in the Sargasso Sea, I—Pulses of primary and new production by Lomas, M.W., Lipschultz, F., Nelson, D.M., Krause, J.W., Bates, N.R.

“…We have hypothesized that the weekly/biweekly passage of winter storms in the subtropical open ocean destabilizes the water column leading to pulsed NO 3 −…”
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COMPARISONS OF NITRATE UPTAKE, STORAGE, AND REDUCTION IN MARINE DIATOMS AND FLAGELLATES by Lomas, Michael W., Glibert, Patricia M.

“…Diatoms, but not flagellates, have been shown to increase rates of nitrogen release after a shift from a low growth irradiance to a much higher experimental…”
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Biogeochemical responses to late-winter storms in the Sargasso Sea. IV. Rapid succession of major phytoplankton groups by Lomas, M.W., Roberts, N., Lipschultz, F., Krause, J.W., Nelson, D.M., Bates, N.R.

“…In this paper, we present multi-parameter data on phytoplankton community composition, and its response to storm events in the Sargasso Sea in late February…”
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Temperature Regulation of Nitrate Uptake: A Novel Hypothesis about Nitrate Uptake and Reduction in Cool-Water Diatoms by Lomas, Michael W., Glibert, Patricia M.

“…Marine diatoms generally form large blooms during periods of cool temperature ($<20^\circ C$), high NO- 3fluxes ($>$25 μ M-N), and turbulent mixing, but the…”
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A new time series of particle export from neutrally buoyant sediments traps at the Bermuda Atlantic Time-series Study site by OWENS, S. A, BUESSELER, K. O, LAMBORG, C. H, VALDES, J, LOMAS, M. W, JOHNSON, R. J, STEINBERG, D. K, SIEGEL, D. A

“…Neutrally buoyant sediment traps (NBSTs) were deployed concurrently with particle interceptor traps (PITs) on monthly cruises of the Bermuda Atlantic…”
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Picoheterotroph (Bacteria and Archaea) biomass distribution in the global ocean by Buitenhuis, E. T, Li, W. K. W, Lomas, M. W, Karl, D. M, Landry, M. R, Jacquet, S

“…We compiled a database of 39 766 data points consisting of flow cytometric and microscopical measurements of picoheterotroph abundance, including both Bacteria…”
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Interactions between NH4+ and NO3- uptake and assimilation: Comparison of diatoms and dinoflagellates at several growth temperatures by Lomas, M W, Glibert, P M

“…Ammonium concentrations of ∼1 M are commonly cited as being the threshold for inhibition of NO3 - uptake, but the applicability of this threshold to…”
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Seasonal decoupling of particulate organic carbon export and net primary production in relation to sea-ice at the shelf break of the eastern Bering Sea: Implications for off-shelf carbon export by Baumann, M. S., Moran, S. B., Lomas, M. W., Kelly, R. P., Bell, D. W.

“…Particulate organic carbon (POC) export fluxes and net primary production (NPP) rates are used to assess seasonal patterns in the export ratio (e‐ratio = POC…”
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