title: Effects of environmental factors on the uptake rates of dissolved nitrogen by a salt-water green alga (Oocystis borgei Snow).
abstract: Uptake rates for dissolved nitrogen (DN) by a marine alga (Oocystis borgei) were examined in a (15)N tracer experiment. Maximal uptake rates for all forms of DN were observed at temperatures between 25 and 30°C and at algal concentrations between 3.22 × 10(8) and 4.78 × 10(8 )cell L(-1). Light intensity required to achieve the maximal uptake rate was 45 μmol m(-2) s(-1) for dissolved inorganic nitrogen (DIN = NO(3) (-), NO(2) (-), NH(4) (+)) and methionine, and 126 μmol m(-2) s(-1) for urea. Salinity required to achieve the maximal uptake rate was 12.85 ppt for DIN, 19.89 ppt for urea and 26.2 ppt for methionine.
authors.affiliation: School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
authors.forename: Xianghu
authors.initials: X
authors.lastname: Huang
authors.forename: Xiaoju
authors.initials: X
authors.lastname: Li
authors.forename: Yaqiong
authors.initials: Y
authors.lastname: Wang
authors.forename: Meihua
authors.initials: M
authors.lastname: Zhou
mesh_terms: D017756:Aquaculture; D000460:Chlorophyta / Q000254:growth & development / Q000378:metabolism*; D004777:Environment; D008027:Light; D009584:Nitrogen / Q000378:metabolism*; D054712:Salinity; D012623:Seawater / Q000737:chemistry*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D014874:Water Pollutants, Chemical; D009584:Nitrogen