Primary production in headwater streams of the Seine basin: The Grand Morin river case study - Archive ouverte HAL Access content directly
Journal Articles Science of the Total Environment Year : 2007

Primary production in headwater streams of the Seine basin: The Grand Morin river case study

Production primaire dans les rivières amont du bassin de la Seine : le cas du Grand Morin

(1) , (2, 3) , (1) , (1) , (4) , (1)
1
2
3
4

Abstract

Periphytic biomass has an important influence on the water quality of many shallow streams. The purpose of this paper is to synthesize the knowledge obtained on periphyton during the PIREN SEINE research program. Periphyton was sampled using chl a measurements by acetone extraction and oxygen measurements with microelectrodes. The experiments reveal the presence of an important fixed biomass ranging between 123 and 850 mgchl a m−2 and the mean gross production (photosynthesis) is shown to range between 180 and 315 mgC m−2 h−1. An independent approach was performed using the PROSE model, which simulates transport and biogeochemical processes in 22 km of the Grand Morin stream. A strong agreement between in situ measurements and the model results was obtained. The gross production obtained using PROSE is 220 mgC m−2 h−1 for the periphyton, which matches the experimental data. Although the net photosynthetic activity of the phytoplankton (0.84 gC gC−1 d−1) is higher than the periphytic one (0.33 gC gC−1 d−1), the absolute periphytic activity is greater since the mean biomass (3.4 gCm− 2) is 10 times higher than the phytoplanktonic one (0.3 gCm−2), due to the short residence time of the water body (1.5d).

Dates and versions

hal-02589072 , version 1 (15-05-2020)

Identifiers

Cite

N. Flipo, C Rabouille, M. Poulin, S. Even, M.H. Tusseau-Vuillemin, et al.. Primary production in headwater streams of the Seine basin: The Grand Morin river case study. Science of the Total Environment, 2007, 375, pp.98-109. ⟨10.1016/j.scitotenv.2006.12.015⟩. ⟨hal-02589072⟩
135 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More