scholarly journals Influence of the Phytoplankton Community Structure on the Spring and Annual Primary Production in the Northwestern Mediterranean Sea

2017 ◽  
Vol 122 (12) ◽  
pp. 9918-9936 ◽  
Author(s):  
Nicolas Mayot ◽  
Fabrizio D'Ortenzio ◽  
Julia Uitz ◽  
Bernard Gentili ◽  
Joséphine Ras ◽  
...  
Keyword(s):  
Community Structure ◽  
Primary Production ◽  
Mediterranean Sea ◽  
Phytoplankton Community ◽  
Phytoplankton Community Structure ◽  
Northwestern Mediterranean Sea ◽  
Annual Primary Production ◽  
Northwestern Mediterranean

scholarly journals Phytoplankton Community Structure Is Driven by Stratification in the Oligotrophic Mediterranean Sea

2019 ◽  
Vol 10 ◽  
Author(s):  
Catalina Mena ◽  
Patricia Reglero ◽  
Manuel Hidalgo ◽  
Eva Sintes ◽  
Rocío Santiago ◽  
...  
Keyword(s):  
Community Structure ◽  
Mediterranean Sea ◽  
Phytoplankton Community ◽  
Phytoplankton Community Structure

scholarly journals Climate change impacts on net primary production (NPP) and export production (EP) regulated by increasing stratification and phytoplankton community structure in CMIP5 models

2015 ◽  
Vol 12 (15) ◽  
pp. 12851-12897 ◽  
Author(s):  
W. Fu ◽  
J. Randerson ◽  
J. K. Moore
Keyword(s):  
Climate Change ◽  
Community Structure ◽  
Primary Production ◽  
Phytoplankton Community ◽  
Net Primary Production ◽  
Climate Change Impacts ◽  
Climate Impacts ◽  
Cmip5 Models ◽  
Phytoplankton Community Structure ◽  
Rcp 8.5

Abstract. We examine climate change impacts on net primary production (NPP) and export production (sinking particulate flux; EP) with simulations from nine Earth System Models (ESMs) performed in the framework of the fifth Coupled Model Inter-comparison Project (CMIP5). Global NPP and EP are reduced considerably by the end of the century for the intense warming scenario of Representative Concentration Pathway (RCP) 8.5. Relative to the 1990s, global NPP in the 2090s is reduced by 2.3–16 % and EP by 7–18 %. The models with the largest increases in stratification (and largest relative reductions in NPP and EP) also show the largest positive biases in stratification for the contemporary period, suggesting some potential overestimation of climate impacts on NPP and EP. All of the CMIP5 models show an increase in stratification in response to surface ocean warming and freshening that is accompanied by decreases in NPP, EP, and surface macronutrient concentrations. There is considerable variability across models in the absolute magnitude of these fluxes, surface nutrient concentrations, and their perturbations by climate change, indicating large model uncertainties. The negative response of NPP and EP to stratification increases reflects a bottom-up control, as nutrient flux to the euphotic zone declines. Models with dynamic phytoplankton community structure show larger declines in EP than in NPP. This is driven by phytoplankton community composition shifts, with a reduced percentage of NPP by large phytoplankton under RCP 8.5, as smaller phytoplankton are favored under the increasing nutrient stress. Thus, projections of the NPP response to climate change in the CMIP5 models are critically dependent on the simulated phytoplankton community structure, the efficiency of the biological pump, and the resulting (highly variable) levels of regenerated production. Community composition is represented relatively simply in the CMIP5 models, and should be expanded to better capture the spatial patterns and the changes in export efficiency that are necessary for predicting climate impacts on NPP.

scholarly journals Nutrient supply controls picoplankton community structure during three contrasting seasons in the northwestern Mediterranean Sea

2016 ◽  
Vol 543 ◽  
pp. 1-19 ◽  
Author(s):  
B Mouriño-Carballido ◽  
E Hojas ◽  
P Cermeño ◽  
P Chouciño ◽  
B Fernández-Castro ◽  
...  
Keyword(s):  
Community Structure ◽  
Mediterranean Sea ◽  
Nutrient Supply ◽  
Northwestern Mediterranean Sea ◽  
Northwestern Mediterranean
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