Effects of light and nutrients on Ulva lactuca and Ulvaria obscura

This data set includes responses of Ulva lactuca and Ulvaria obscura to manipulations of light levels and seawater nitrate concentrations. Algae were grown for two weeks in ESAW media that contained sodium nitrate concentrations of either 10 or 160 µM. at the end of the experiment they were harvested and measurements were made. The following columns are in the Excel files: Sample ID: First character: O: Ulvaria obscura / L: Ulva lactuca Second character: H: High light level / S: Shaded (low light level) Third character: N: Nitrogen replete / D: Nitrogen limited Fourth and fifth characters: replicate number Alga: Genus name Light: Experimental irradiance (in µeinsteins/m2/sec) [N]: Nitrate concentration (in µM) Yield: photosynthetic yield (as Fv/Fm) SA: surface area (in mm2) PG (M): proportional growth in mass PG (SA): proportional growth in surface area SA:M: PG (SA)/PG (M) DMSP: dimethylsulfoniopropionate concentration (in µmol/g dry mass of algae) DA: dopamine concentration (in µmol/g dry mass of algae) C: carbon concentration (% of algal dry mass) N: nitrogen concentration (% of algal dry mass) Chl a: chlorophyll a concentration (% of algal dry mass) Chl b: chlorophyll b concentration (% of algal dry mass) TC: total carotenoids (% of algal dry mass)本数据集包含石莼（Ulva lactuca）与暗管藻（Ulvaria obscura）对光照水平及海水硝酸盐浓度调控处理的响应数据。实验中，藻类于ESAW培养基中培养两周，培养基内硝酸钠浓度分别设置为10 µM与160 µM。实验结束后收获藻类并完成各项测量。 Excel文件包含以下列： Sample ID：样本编号，编码规则如下：首字符：O代表暗管藻（Ulvaria obscura），L代表石莼（Ulva lactuca）；第二个字符：H代表高光水平，S代表遮阴（低光照水平）；第三个字符：N代表氮充足条件，D代表氮限制条件；第四、五位字符为重复实验编号。 Alga：藻类属名 Light：实验辐照度（单位：µeinsteins/m²/秒） [N]：硝酸盐浓度（单位：µM） Yield：光合产率（以Fv/Fm为指标） SA：表面积（单位：mm²） PG (M)：质量相对增长率 PG (SA)：表面积相对增长率 SA:M：PG (SA)/PG (M)（即表面积相对增长率与质量相对增长率的比值） DMSP：二甲基巯基丙酸内盐（dimethylsulfoniopropionate）浓度（单位：µmol/g 藻类干重） DA：多巴胺浓度（单位：µmol/g 藻类干重） C：碳浓度（占藻类干重的百分比） N：氮浓度（占藻类干重的百分比） Chl a：叶绿素a浓度（占藻类干重的百分比） Chl b：叶绿素b浓度（占藻类干重的百分比） TC：总类胡萝卜素含量（占藻类干重的百分比）