Spatiotemporal dynamics of physicochemical and photosynthetic parameters in the central English Channel. Napoléon, C., Raimbault, V., Fiant, L., Riou, P., Lefebvre, S., Lampert, L., & Claquin, P. 69:43–52.
Spatiotemporal dynamics of physicochemical and photosynthetic parameters in the central English Channel [link]Paper  doi  abstract   bibtex   
Hydrological and photosynthetic parameters were investigated monthly from November 2009 to December 2010 using an opportunity ship, along a transect in the central part of the English Channel. A powerful statistical method, a Partial Triadic Analysis (PTA), was applied on the physicochemical data set and highlighted the functioning of four different ecosystems: (i) the French coast area (FRcoast) subjected to large freshwater inputs, (ii) the North of the Seine Bay (NSBay) influenced by nutrient inputs from the river Seine and offshore, (iii) the centre of the English Channel (CentreEC) characterized by nutrient offshore inputs and (iv) the English coast area (UKcoast) which exhibits low nutrient concentrations despite the proximity of the English coast. In the FRcoast and the NSBay the phytoplankton biomass peaked from mid-January to June. In contrast, in the UKcoast the phytoplankton biomass peak occurred from mid-November to March. In addition, we noticed that these coastal ecosystems showed two types of photosynthetic regulations. Photoacclimation mechanisms were observed in the FRcoast and the NSBay and a control of the photosynthetic parameters by nutrients in the UKcoast. This study highlights the importance of a “top down” control in winter/spring and underlines a complex situation in autumn with an uncoupling between rETRmax and the Chlorophyll a biomass. In order to understand this uncoupling it is necessary to estimate the loss due to zooplankton grazing and viral lysis as well as carbon excretion.
@article{napoleon_spatiotemporal_2012,
	title = {Spatiotemporal dynamics of physicochemical and photosynthetic parameters in the central English Channel},
	volume = {69},
	issn = {1385-1101},
	url = {http://www.sciencedirect.com/science/article/pii/S1385110112000147},
	doi = {10.1016/j.seares.2012.01.005},
	abstract = {Hydrological and photosynthetic parameters were investigated monthly from November 2009 to December 2010 using an opportunity ship, along a transect in the central part of the English Channel. A powerful statistical method, a Partial Triadic Analysis ({PTA}), was applied on the physicochemical data set and highlighted the functioning of four different ecosystems: (i) the French coast area ({FRcoast}) subjected to large freshwater inputs, (ii) the North of the Seine Bay ({NSBay}) influenced by nutrient inputs from the river Seine and offshore, (iii) the centre of the English Channel ({CentreEC}) characterized by nutrient offshore inputs and (iv) the English coast area ({UKcoast}) which exhibits low nutrient concentrations despite the proximity of the English coast. In the {FRcoast} and the {NSBay} the phytoplankton biomass peaked from mid-January to June. In contrast, in the {UKcoast} the phytoplankton biomass peak occurred from mid-November to March. In addition, we noticed that these coastal ecosystems showed two types of photosynthetic regulations. Photoacclimation mechanisms were observed in the {FRcoast} and the {NSBay} and a control of the photosynthetic parameters by nutrients in the {UKcoast}. This study highlights the importance of a “top down” control in winter/spring and underlines a complex situation in autumn with an uncoupling between {rETRmax} and the Chlorophyll a biomass. In order to understand this uncoupling it is necessary to estimate the loss due to zooplankton grazing and viral lysis as well as carbon excretion.},
	pages = {43--52},
	journaltitle = {Journal of Sea Research},
	shortjournal = {Journal of Sea Research},
	author = {Napoléon, Camille and Raimbault, Virginie and Fiant, Liliane and Riou, Philippe and Lefebvre, Sébastien and Lampert, Luis and Claquin, Pascal},
	urldate = {2019-04-16},
	date = {2012-04-01},
	keywords = {Phytoplankton, Nutrients, Photosynthesis, {PAM}, Ferry, Partial Triadic Analyses}
}
Downloads: 0