Six years of submerged aquatic vegetation and nitrogen retention data in a large river

Here we provide five datasets that describes plant biomass, environmental variables and nitrogen retention time series in a submerged aquatic vegetation (SAV) meadow at the confluence of two agricultural tributaries with the St. Lawrence River in southern Lake Saint-Pierre. The four datasets are 1) Growing season (June 21 to September 22) daily environmental variables (water level, water temperature, light, tributaries input, and SAV biomass indicator) 2) Mean SAV biomass measured using rake or quadrat samples in the meadow 3) Modelled daily nitrate tributary inputs to the SAV bed 4) Daily nitrate output to the SAV bed estimated from a sensor 5) Daily nitrate budget Original data comes from Lake Saint-Pierre, either from publicly available government agencies data, from a project led by the Groupe de recherche interuniversitaire en limnologie (GRIL, 2012-2015) and by Morgan Botrel Ph.D. candidate (2016-2017, Université de Montréal) or from Christiane Hudon (ECCC). Data were created for an article on climate-driven variation in nitrogen retention, led by Morgan Botrel and supervisor Roxane Maranger, with Christiane Hudon, James B. Heffernan and Pascale M. Biron.