Bioremediation potential of Palmaria palmata and Chondrus crispus (Basin Head): effect of nitrate and ammonium ratio as nitrogen source on nutrient removal |
| |
Authors: | Peter Corey Jang K Kim Jim Duston David J Garbary Balakrishnan Prithiviraj |
| |
Institution: | 1. Scotian Halibut Ltd, Wood’s Harbour, Nova Scotia, Canada, B0W 2E0 2. Department of Marine Sciences, University of Connecticut, One University Place, Stamford, CT, USA 3. Department of Plant and Animal Sciences, Faculty of Agriculture, Dalhousie University, PO Box 550, Truro, Nova Scotia, Canada, B2N 5E3 4. Department of Biology, St. Francis Xavier University, Antigonish, Nova Scotia, Canada, B2G 2W5 5. Department of Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada, B2N 5E3
|
| |
Abstract: | Palmaria palmata and Chondrus crispus were grown for 4 weeks in 1-L flasks at 10 °C to evaluate nutrient uptake and their potential application as nutrient biofilters in effluent from finfish culture. For greatest bioremediation benefit within an integrated system, we conclude that a seaweed biofilter using these species should be placed prior to bacterial biofiltration for exposure to greater proportions of ammonium than nitrate, though it is apparent that the productivity of both species is not influenced by the nitrogen source. Five combinations of ammonium– and nitrate–nitrogen were compared, each with a total N concentration of 300 μM (300:0, 270:30, 150:150, 30:270, 0:300). Molar nitrogen/phosphorus ratio was 10:1. The maximum growth rates were 8.9 and 6.0 % per day for P. palmata and C. crispus, respectively. For both species, the total nitrogen uptake was highest at 300 μM ammonium, 4.46 mgN gDW?1 day?1 for P. palmata and 3.40 mg?N? g?DW?1?day?1 for C. crispus. Over a 24-h period, 23–37 % of the available nitrate and 91–100 % of the available ammonium were taken up by P. palmata. In the same period, C. crispus took up 55–87 % of available nitrate and 89–100 % of ammonium. Tissue N in P. palmata was highest (4.1 %) at 270 and 300 μM ammonium, while the nitrogen source did not have a significant effect on the tissue N of C. crispus (mean of 4.6 %). |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|