Effects of road runoff on biomass and metabolic activity of periphyton in experimental streams. Export

@article{citeulike:898511, abstract = {Aquatic ecosystems could be enriched with inorganic and organic matters after road runoff discharge. In this context, we studied the effects of road runoff on river biofilms (periphyton). To operate under controlled conditions the experiments were carried out in two indoor experimental streams. Glass slides were used as artificial substrates for the periphyton colonisation in the experimental streams. Current velocity was maintained at 12 cms(-1) (slow) in the first experimental stream and at 50 cms(-1) (fast) in the second one. The periphyton communities were periodically exposed to road runoff over 30 days. For this experiment, the road runoff was collected in settling basins of a motorway during rainfall events. The runoff was then characterised according to physical and chemical parameters. We tested two exposure durations (1 and 4 h) and two runoff dilutions (10\% and 50\%). Two laboratory experiments carried out during this study revealed that the biomass (AFDW: 0.92-2.83 g m(-2)), the chlorophyll a content (6.8-78.9 mg m(-2)) and the metabolic activity (net primary production: 61-334 m gO(2) m(-2)h(-1) and respiration: 17.2-68.3 mg O(2) m(-2) h(-1)) of the biofilms increased (p < 0.05). However, this was a function of current velocity, the runoff exposure duration, and the content in organic and inorganic elements present in the tested rainwater. Experimental streams constituted a simplified natural system, which did not allow the reproduction of all the environmental conditions. Thus, these experiments should be performed on natural sites.}, address = {Laboratoire des Sciences de l'Environnement, Ecole Nationale des Travaux Publics de l'Etat, Vaulx-en-Velin, France. jeanclaude.boisson@entpe.fr}, author = {Boisson, J. C. and Perrodin, Y.}, citeulike-article-id = {898511}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.jhazmat.2005.07.083}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/16297534}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=16297534}, day = {20}, doi = {10.1016/j.jhazmat.2005.07.083}, issn = {0304-3894}, journal = {J Hazard Mater}, keywords = {biomass, experimental-stream, impact, metabolic-activity, metabolism, periphyton, road-runoff, runoff, stream}, month = {May}, number = {2-3}, pages = {148--154}, posted-at = {2006-10-15 21:33:18}, priority = {4}, title = {Effects of road runoff on biomass and metabolic activity of periphyton in experimental streams.}, url = {http://dx.doi.org/10.1016/j.jhazmat.2005.07.083}, volume = {132}, year = {2006} }

TY - JOUR ID - citeulike:898511 L3 - citeulike-article-id:898511 N2 - Aquatic ecosystems could be enriched with inorganic and organic matters after road runoff discharge. In this context, we studied the effects of road runoff on river biofilms (periphyton). To operate under controlled conditions the experiments were carried out in two indoor experimental streams. Glass slides were used as artificial substrates for the periphyton colonisation in the experimental streams. Current velocity was maintained at 12 cms(-1) (slow) in the first experimental stream and at 50 cms(-1) (fast) in the second one. The periphyton communities were periodically exposed to road runoff over 30 days. For this experiment, the road runoff was collected in settling basins of a motorway during rainfall events. The runoff was then characterised according to physical and chemical parameters. We tested two exposure durations (1 and 4 h) and two runoff dilutions (10% and 50%). Two laboratory experiments carried out during this study revealed that the biomass (AFDW: 0.92-2.83 g m(-2)), the chlorophyll a content (6.8-78.9 mg m(-2)) and the metabolic activity (net primary production: 61-334 m gO(2) m(-2)h(-1) and respiration: 17.2-68.3 mg O(2) m(-2) h(-1)) of the biofilms increased (p < 0.05). However, this was a function of current velocity, the runoff exposure duration, and the content in organic and inorganic elements present in the tested rainwater. Experimental streams constituted a simplified natural system, which did not allow the reproduction of all the environmental conditions. Thus, these experiments should be performed on natural sites. IS - 2-3 JF - J Hazard Mater SN - 0304-3894 AD - Laboratoire des Sciences de l'Environnement, Ecole Nationale des Travaux Publics de l'Etat, Vaulx-en-Velin, France. jeanclaude.boisson@entpe.fr EP - 154 TI - Effects of road runoff on biomass and metabolic activity of periphyton in experimental streams. VL - 132 SP - 148 KW - biomass KW - experimental-stream KW - impact KW - metabolic-activity KW - metabolism KW - periphyton KW - road-runoff KW - runoff KW - stream AU - Boisson, JC AU - Perrodin, Y PY - 2006/05/20/ UR - http://dx.doi.org/10.1016/j.jhazmat.2005.07.083 ER -