00000nam 2200000za 4500 9.849779 CaOODSP 20241203113641 cr ||||||||||| 180110s1986 onca|||fob f000 0 eng d CaOODSP eng eng fre n-cn--- En13-5/86-143E-PDF Cuhel, Russell L. Protein synthesis by lake plankton measured using in situ carbon dioxide and sulfate assimilation [electronic resource] / by Russell L. Cuhel and David R.S. Lean. Burlington, Ont. : National Water Research Institute, [1986]. 34, [20] p. : ill. NWRI contribution series ; # 86-143 "December 1986". "This manuscript has been submitted to the Journal of Fisheries & Aquatic Science - Special Issue for publication and the contents are subject to change". Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references: p. 27-34. "The estimation of 'growth' of planktonic communities has been complicated by an inability to separate growth of bacteria which use organic substrates from algae that fix carbon dioxide for growth. Quantification of carbon recycling via algal respiration and excretion also remains elusive. These problems were avoided by measuring protein production. Furthermore, the subcellular composition of other newly formed biopolymers(carbohydrate and lipid) was estimated. These methods provided doubling times for the plankton population of 10 to 20 days instead of the 3-5 days from previous methods. This information makes the modelling of transport rates of nutrients much different. Recyling through zooplankton grazing is in balance with growth. Such food chain studies are a prerequisite for contaminant process studies. As part of the present study, pathways for sulfate metabolism in a lake ecosystem are also described"--Management perspective. Includes management perspective and abstract in French. gccst Water quality gccst Lakes gccst Ecology Lean, David R. S. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 86-143 (CaOODSP)9.844121 PDF 3.72 MB https://publications.gc.ca/collections/collection_2018/eccc/En13-5-86-143-eng.pdf