caa a22 4500 465762050 CHVBK 20180323111902.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF00877280 doi (NATIONALLICENCE)springer-10.1007/BF00877280 The short term response to eutrophication abatement [Elektronische Daten] [Knut Seip, Hein Sas, Steven Vermij] We compare results of a new model for predicting the short term inter annual changes in chlorophyll-a (chl-a) in lakes after reductions in total phosphorus (TP) to predictions made by least squares regression models. In the new method, slopes of chl-a/TP graphs (both axes in mg · m−3) are depicted in frequency diagrams and used to extract information on the expected, short term chl-a/TP response. The short term response for nine shallow (< 10 m deep) and nutrient rich lakes to changes in TP was found to be: Chl-a = 0.49 · TP + 17.3, and for nine deep, P-limited lakes: Chl-a = 0.08 · TP + 3.5. If the TP-reduction is known to be greater than 10 mg · m−3, the expected slope increases to 0.58 for shallow lakes and to 0.26 for deep lakes. The slope, 0.58, is 8% lower than the slope for the long term response calculated by regression for the shallow lakes. For deep lakes the slope, 0.26, is 2 to 3 times higher than that calculated by regression, indicating that reductions in TP for deep lakes give greater effects than least squares regression equations suggest. We have also calculated the reduction in TP which will give about 80% probability that a reduction in chl-a will be observed next year. For shallow, P-limited lakes this reduction is about 30 mg · m−3 (5% of average initial in-lake TP concentration), and for deep lakes about 14 mg · m−3 (35% of average initial in-lake TP concentration). Birkhäuser Verlag, 1990 Eutrophication nationallicence lake management nationallicence phosphorus nationallicence ecosystem nationallicence chlorophyll- a nationallicence mathematical modelling nationallicence Seip Knut Center for Industrial Research, Forskningsvn. 1, 0314, Oslo 3, Norway aut Sas Hein IMSA Instituut voor Milieu — en Systeemanalyse, Emmastraat 16, 1075 HT, Amsterdam, The Netherlands aut Vermij Steven IMSA Instituut voor Milieu — en Systeemanalyse, Emmastraat 16, 1075 HT, Amsterdam, The Netherlands aut Aquatic Sciences Birkhäuser-Verlag 52/3(1990-09-01), 199-220 1015-1621 52:3<199 1990 52 27 https://doi.org/10.1007/BF00877280 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00877280 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Seip Knut Center for Industrial Research, Forskningsvn. 1, 0314, Oslo 3, Norway aut NATIONALLICENCE 700 1- Sas Hein IMSA Instituut voor Milieu — en Systeemanalyse, Emmastraat 16, 1075 HT, Amsterdam, The Netherlands aut NATIONALLICENCE 700 1- Vermij Steven IMSA Instituut voor Milieu — en Systeemanalyse, Emmastraat 16, 1075 HT, Amsterdam, The Netherlands aut NATIONALLICENCE 773 0- Aquatic Sciences Birkhäuser-Verlag 52/3(1990-09-01), 199-220 1015-1621 52:3<199 1990 52 27 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer