Limnological and pigment data for surface waters along a hydrological continuum of the Sheldrake River, Nunavik

Northern terrestrial ecosystems are undergoing rapid transformation, potentially affecting the chemistry and microbial community structure in rivers flowing through them. The Sheldrake River flows through permafrost degradation and vegetation gradients resulting from the influence of Hudson Bay on the coastal climate. From 23 to 27 August 2019, we sampled surface waters along a hydrological continuum flowing through this permafrost and vegetation gradients, as well as a salinity gradient. This sampling includes Sheldrake Lake and River, the Sheldrake River plume flowing into Hudson Bay, the coastal waters of Hudson Bay, and an unnamed tributary of the Sheldrake River. This limnological and pigment dataset is complementary to an amplicon dataset (prokaryotes and microbial eukaryotes) available at the NCBI Sequence Read Archive (BioProject: PRJNA803180). It includes data for nutrients (total nitrogen and phosphorus), carbon (dissolved organic and inorganic), dissolved organic carbon characterization (SUVA254, SR, a320, S289), cell abundance measured by flow cytometry, salinity, temperature, oxygen, major cations, pH, specific conductivity, total suspended sediment concentration, and pigments determined by high-performance liquid chromatography.

北方陆地生态系统正经历快速演变，这可能会对流经该类生态系统的河流的化学性质与微生物群落结构造成影响。谢尔德里克河（Sheldrake River）流经因哈德逊湾对沿岸气候影响而形成的多年冻土退化带与植被梯度带。2019年8月23日至27日，我们沿贯穿该多年冻土与植被梯度带以及盐度梯度带的水文连续体对地表水进行了采样。本次采样覆盖谢尔德里克湖与谢尔德里克河、注入哈德逊湾的谢尔德里克河羽状流区、哈德逊湾沿岸海域，以及谢尔德里克河的一条无名支流。本湖沼学与色素数据集可与已上传至美国国家生物技术信息中心（NCBI）序列读取存档（BioProject编号：PRJNA803180）的扩增子数据集（涵盖原核生物与真核微生物）形成互补。数据集包含以下各类检测数据：营养盐（总氮与总磷）、碳组分（溶解性有机碳与溶解性无机碳）、溶解性有机碳特征参数（SUVA254、SR、a320、S289）、流式细胞术测定的细胞丰度、盐度、温度、溶解氧、主要阳离子、pH值、比电导率、总悬浮泥沙浓度，以及高效液相色谱法测定的色素含量。