On the Interannual Variability in Phytoplankton Production in Freshwaters

2007 ◽  
pp. 187-221 ◽  
Author(s):  
Colin S. Reynolds
Keyword(s):  
Interannual Variability ◽  
Phytoplankton Production

scholarly journals Model study of nutrient and phytoplankton dynamics in the Gulf of Maine: patterns and drivers for seasonal and interannual variability

2014 ◽  
Vol 72 (2) ◽  
pp. 388-402 ◽  
Author(s):  
Rucheng Tian ◽  
Changsheng Chen ◽  
Jianhua Qi ◽  
Rubao Ji ◽  
Robert C. Beardsley ◽  
...  
Keyword(s):  
Interannual Variability ◽  
Gulf Of Maine ◽  
Phytoplankton Bloom ◽  
Function Analysis ◽  
Nutrient Supply ◽  
Open Boundary ◽  
Phytoplankton Production ◽  
Phytoplankton Dynamics ◽  
Salinity Regime ◽  
Dominant Feature

Abstract Coupled physical–biological modelling experiments were made for the period of 1995–2009 to analyse the spatial and interannual variability of nutrients and phytoplankton production in the Gulf of Maine (GOM). The physical model was the Finite-Volume Community Ocean Model (FVCOM) and the biological model was a Nitrogen, Phytoplankton, Zooplankton, and Detritus (NPZD) model. The simulation was carried out with realistic meteorological surface forcing, five major tidal constituents, river discharge, and observation-based open boundary conditions. The results were robust with comparison to SeaWiFS chlorophyll data and historical data of nitrogen. An Empirical Orthogonal Function analysis clearly identified two dominant modes in nutrient and phytoplankton dynamics: (1) sustained nutrient supply and phytoplankton production from spring through autumn, and (2) a dominating phytoplankton bloom in spring, relatively low production in summer, and a noticeable bloom in autumn. Mode 1 was a dominant feature in strong tidal energy dissipation regions such as the southwestern shelf of Nova Scotia, Georges Bank, Nantucket Shoals, the Bay of Fundy, and the coastal regions of GOM, where tidal pumping and mixing were the major drivers for the sustained nutrient supply, and primary production showed certain resilience with less interannual variability. Mode 2 was a characteristic in the deep Gulf, the offshore region of the Scotian Shelf, and in the open sea area, where the timing and amplitude of the spring phytoplankton bloom is essentially controlled by the salinity regime, and its interannual variability was significantly influenced by freshening events controlled by local and remote forcing.

scholarly journals Interannual variability in Nordic seas primary production

2007 ◽  
Vol 64 (5) ◽  
pp. 889-898 ◽  
Author(s):  
Morten D. Skogen ◽  
W. Paul Budgell ◽  
Francisco Rey
Keyword(s):  
Primary Production ◽  
Interannual Variability ◽  
Biological Material ◽  
Ocean Model ◽  
Phytoplankton Production ◽  
Commercial Fish ◽  
Nordic Seas ◽  
The North ◽  
The North Atlantic Oscillation ◽  
Strong Control

Abstract Skogen, M. D., Budgell, W. P., and Rey, F. 2007. Interannual variability in Nordic seas primary production. – ICES Journal of Marine Science, 64: 889–898. Phytoplankton represents the primary trophic level in marine pelagic ecosystems, through which most biological material produced by photosynthesis is further channelled through the foodweb via grazing by zooplankton. Therefore, the level and variability of primary production is believed to be an important factor for fish recruitment and growth. The Nordic seas are important feeding areas for large and important commercial fish stocks, but because of a scarcity of measurements, only few estimates of primary production exist. Additionally, primary production is highly variable because of the wide variations in light, temperature, and nutrient supply at a specific time and location. Here, primary production in the Nordic seas is studied using a coupled 3D physical, chemical, and biological ocean model, revealing large variations in primary production in space and time. The model gives a mean annual production of 73 gC m−2 y−1 and a 20% variation in phytoplankton biomass between the years of highest and lowest production. The interannual variability is linked to the North Atlantic Oscillation, sea ice, and the transport of water into the Nordic seas. The strong control of phytoplankton production by the physics suggests a possible mechanism for how climate can be an important driver for the availability of biological material in foodwebs.

Phytoplankton Production and Decomposition Characteristics in Water Bodies Differing in the Degree of Their Contamination by Inorganic Compounds of Nitrogen and Phosphorus

2019 ◽  
Vol 55 (3) ◽  
pp. 29-43 ◽  
Author(s):  
P. D. Klochenko ◽  
T. F. Shevchenko ◽  
I. N. Nezbrytskaya ◽  
Ye. P. Belous ◽  
Z. N. Gorbunova ◽  
...  
Keyword(s):  
Inorganic Compounds ◽  
Water Bodies ◽  
Phytoplankton Production ◽  
Nitrogen And Phosphorus

Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O2/N2and CO2data

Tellus B ◽  
2008 ◽  
Vol 60 (5) ◽  
Author(s):  
C. Rödenbeck ◽  
C. Le Quéré ◽  
M. Heimann ◽  
R. F. Keeling
Keyword(s):  
Interannual Variability ◽  
Biogeochemical Processes

Seasonal and interannual variability in13C composition of ecosystem carbon fluxes in the U.S. Southern Great Plains

Tellus B ◽  
2011 ◽  
Vol 63 (2) ◽  
Author(s):  
Margaret S. Torn ◽  
Sebastien C. Biraud ◽  
Christopher J. Still ◽  
William J. Riley ◽  
Joe A. Berry
Keyword(s):  
Interannual Variability ◽  
Great Plains ◽  
Carbon Fluxes ◽  
Southern Great Plains ◽  
Seasonal And Interannual Variability ◽  
Ecosystem Carbon ◽  
Ecosystem Carbon Fluxes ◽  
The U.S
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