Results 261 to 270 of about 1,008,339 (282)

Global net community production and the putative net heterotrophy of the oligotrophic oceans

Global Biogeochemical Cycles, 2012
Reconciling rates of organic carbon export from the euphotic zone with the consumption of organic material in the dark ocean remains one of the major quantitative uncertainties of the ocean carbon cycle. Euphotic zone net community production (NCP) provides one broad constraint on export flux and potential carbon drawdown.
Toby K. Westberry, Peter J. le B. Williams, Michael J. Behrenfeld   +2 more
openaire   +1 more source

Whole season net community production in the Weddell Sea

Polar Biology, 2007
Depletions of total CO2, nitrate, phosphate and silicate in the surface layer were calculated for cruise ANT XXII/3 with FS Polarstern in March 2005 for estimating the annual net community production. East-west across the Weddell Sea the variation of all depletions is similar, but this holds to a lesser extent for silicate. Depletions in March 2005 are
Hoppema, Mario, Middag, Rob, de Baar, Hein J. W., Fahrbach, Eberhard, van Weerlee, Evaline M., Thomas, Helmuth, Weerle, E.M.   +6 more
openaire   +2 more sources

Control of net community production by microbial community respiration at Station ALOHA

Journal of Marine Systems, 2018
Abstract Net community production (NCP) constrains the amount of carbon that is available for storage within or export from, the photic zone of marine ecosystems. With the aim of studying the control exerted by microbial community respiration (MCR) and gross primary production (GPP) over NCP, short-term variability in rates of MCR, GPP and NCP were ...
Martinez-Garcia S, Bidigare RR, del Valle DA, Juranek LW, Nicholson DP, Viviani DA, Wilson ST, Church MJ   +7 more
openaire   +2 more sources

Towards a communicating petri net tool for modeling production processes

Computers & Industrial Engineering, 1999
Abstract This paper presents an analysis of the process concept based on the ⪡Events, Activities and Process⪢ oriented approach. The analysis has been conducted by constructing a comparison table between the several elements of a process. Several tools exist in the literature for the production processes modeling (IDEF0/IDEF3, DFD, Flowcharts, Petri ...
Selma Limam, Pierre Ladet
openaire   +1 more source

Estimating estuarine gross production, community respiration and net ecosystem production: a nonlinear inverse technique

Ecological Modelling, 2005
We describe a nonlinear inverse technique to estimate gross primary production (GPP), community respiration (CR), and net ecosystem production in the vertically well mixed Parker River, Plum Island Sound estuarine system located in northeastern Massachusetts, USA.
J.J. Vallino, C.S. Hopkinson, R.H. Garritt   +2 more
openaire   +1 more source

Sea level rise can severely reduce biodiversity and community net production on rocky shores

Science of The Total Environment, 2021
Sea level rise (SLR), driven by anthropogenic climate change, can be a major threat to coastal ecosystems. Among the most biologically diverse but SLR-threatened coastal ecosystems are rocky shores, especially in regions with a small tidal range. Nonetheless, the impacts of SLR on rocky shore biodiversity, community structure and ecosystem functions ...
Gil, Rilov, Niv, David, Tamar, Guy-Haim, Dar, Golomb, Reuma, Arav, Sagi, Filin   +5 more
openaire   +2 more sources

Net Ecosystem Production of Two Contrasting Boreal Black Spruce Forest Communities

Ecosystems, 2003
The objective of this study was to compare the carbon (C) budgets of two similar-aged boreal black spruce (Picea mariana [Mill.] BSP) forest communities: closed-canopy black spruce with feathermoss ground cover (BSFM) on moderately drained soils and open-canopy black spruce with Sphagnum ground cover (BSSP) on poorly drained soils.
Kari E. B. O'Connell, Stith T. Gower, John M. Norman   +2 more
openaire   +1 more source

Fortnightly Tidal Modulations Affect Net Community Production in a Mesotidal Estuary

Estuaries and Coasts, 2014
Optical in situ chemical sensors enable sampling intervals and durations that rival acoustic techniques used for measuring currents. Coupling these high-frequency biogeochemical and physical measurements in estuaries to address ecosystem-scale questions, however, is still comparatively novel.
Nicholas J. Nidzieko, Joseph A. Needoba, Stephen G. Monismith, Kenneth S. Johnson   +3 more
openaire   +1 more source

Net community production in the northern Indian Ocean

2009
The monthly/seasonal variability in net community production (NCP) is controlled by the monsoon either through increasing nutrients to the euphotic zone or an increase in river runoff in the northern Indian Ocean. Net autotrophy was found during the southwest monsoon (SWM) in the Arabian Sea, and heterotrophy was found during the spring and fall ...
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Photosynthetic quotients, new production and net community production in the open ocean

Deep Sea Research Part A. Oceanographic Research Papers, 1991
Abstract Based on balanced chemical equations for the production of proteins, polysaccharides, lipids and nucleic acids from inorganic precursors and reported estimates of the composition of microalgal biomass, the photosynthetic quotients (PQs) for new and recycled production are estimated to be 1.4 ± 0.1 and 1.1 ± 0.1, respectively.
openaire   +1 more source