Leaf functional traits and environmental conditions of four common nymphaeid species

This dataset includes measures of 21 leaf functional traits of 48 wild populations of four species of nymphaeids: Nuphar lutea, Nelumbo nucifera, Nymphaea alba and Nymphoides peltata. For each population (plot) coordinates, water depth, pH, specific conductivity, nitrate, dissolved inorganic carbon, dissolved reactive silica, soluble reactive phosphorus, sediment organic matter content and sediment total phosphorus content and sediment density are provided as well. The populations were located in different lake systems in Italy. The dataset includes a legend sheet with information on single traits and environmental variables, including units of measurement. Structural traits (area, fresh and dry weight, dry matter content and specific area) were measured on 5 leaves from different individuals, while leaf pigments and phosphorus content were measured on 3 leaves. Leaf carbon and nitrogen content were measured on one aliquot of the pooled dried material of all leaves. Therefore, the missing values in the dataset derive from the sampling design of the study. All further information on the methodology used to collect and measure the traits and environmental variables can be found in the related paper ("Ecological and functional niches comparison reveals differentiated resource-use strategies and ecological thresholds in four key floating-leaved macrophytes", Dalla Vecchia et al. 2024, Limnology and Oceanography).本数据集包含4种睡莲亚目（Nymphaeids）植物共48个野生种群的21项叶片功能性状测定数据，涉及物种分别为萍蓬草（Nuphar lutea）、莲（Nelumbo nucifera）、白睡莲（Nymphaea alba）及荇菜（Nymphoides peltata）。此外，数据集还提供了每个种群（样地）的坐标、水深、pH值、比电导率、硝酸盐含量、溶解性无机碳含量、溶解性活性硅含量、可溶性活性磷含量、沉积物有机质含量、沉积物总磷含量及沉积物密度等环境变量数据。所有研究种群均分布于意大利不同的湖泊水系中。数据集附带图例表，对各项单个性状与环境变量进行说明，涵盖测量单位。 结构性状（叶面积、鲜重、干重、干物质含量及比叶面积）的测定采用取自不同个体的5片叶片；叶片色素与磷含量的测定则取自3片叶片。叶片碳、氮含量的测定则基于所有叶片混合后的干燥材料的等分试样完成。因此，数据集中的缺失值源于本研究的采样设计方案。关于性状与环境变量的采集、测定方法的详细信息，可参阅相关论文："Ecological and functional niches comparison reveals differentiated resource-use strategies and ecological thresholds in four key floating-leaved macrophytes"，作者为Dalla Vecchia等，发表于2024年的《Limnology and Oceanography》（湖沼学与海洋学）。