| Title: | Inferring time-variable effects of nutrient enrichment on marine ecosystems using inverse modelling and ecological network analysis |
| Author(s): | Luong AD; De Laender F; Olsen Y; Vadstein O; Dewulf J; Janssen CR; |
| Address: | "Department of Sustainable Organic Chemistry and Technology, Research Group EnVOC, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium; Department of Environmental Management, Faculty of Environment, Hanoi University of Agriculture, Hanoi, Viet Nam; Laboratory of Environmental Toxicity and Aquatic Ecology, Ghent University, J. Plateaustraat 22, 9000 Ghent, Belgium. Electronic address: ducanh.luong@ugent.be. Research Unit in Environmental and Evolutionary Biology, Universite de Namur, Rue de Bruxelles, 61, Namur, Belgium. Electronic address: frederik.delaender@unamur.be. Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway. Electronic address: yngvar.olsen@bio.ntnu.no. Department of Biotechnology, Norwegian University of Science and Technology, 7491 Trondheim, Norway. Electronic address: olav.vadstein@biotech.ntnu.no. Department of Sustainable Organic Chemistry and Technology, Research Group EnVOC, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium. Electronic address: jo.dewulf@ugent.be. Laboratory of Environmental Toxicity and Aquatic Ecology, Ghent University, J. Plateaustraat 22, 9000 Ghent, Belgium. Electronic address: colin.janssen@ugent.be" |
| DOI: | 10.1016/j.scitotenv.2014.06.027 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "We combined data from an outdoor mesocosm experiment with carbon budget modelling and an ecological network analysis to assess the effects of continuous nutrient additions on the structural and functional dynamics of a marine planktonic ecosystem. The food web receiving no nutrient additions was fuelled by detritus, as zooplankton consumed 7.2 times more detritus than they consumed algae. Nutrient supply instantly promoted herbivory so that it was comparable to detritivory at the highest nutrient addition rate. Nutrient-induced food web restructuring reduced carbon cycling and decreased the average number of compartments a unit flow of carbon crosses before dissipation. Also, the efficiency of copepod production, the link to higher trophic levels harvestable by man, was lowered up to 35 times by nutrient addition, but showed signs of recovery after 9 to 11 days. The dependency of the food web on exogenous input was not changed by the nutrient additions" |
| Keywords: | "Animals Biomass Copepoda Ecology *Ecosystem Environmental Monitoring/*methods *Models, Theoretical Nitrogen/analysis Phosphorus/*analysis Plankton/classification/growth & development Plants Seawater/chemistry Carbon budget Ecological network analysis Line;" |
| Notes: | "MedlineLuong, Anh D De Laender, Frederik Olsen, Yngvar Vadstein, Olav Dewulf, Jo Janssen, Colin R eng Research Support, Non-U.S. Gov't Netherlands 2014/07/06 Sci Total Environ. 2014 Sep 15; 493:708-18. doi: 10.1016/j.scitotenv.2014.06.027. Epub 2014 Jul 1" |
