Phosphorus, nitrogen, carbon, calcium, pH, and dissolved oxygen data from incubations of Colorado River water and sediment and associated ambient river water measurements

Lake Powell retains most of the phosphorus that it receives, leading to downstream phosphorus limitation. These data were compiled to examine controls on phosphorus cycling below Lake Powell in the Colorado River and from storm inputs from the Paria River. Objectives of our study were to determine how several forms of phosphorus, both organic and inorganic, were cycled under varying dissolved oxygen concentrations and pH, reflecting the range of values observed in the river over the years. These data represent nitrogen, phosphorus, calcium, and carbon concentrations, water quality parameters (pH, dissolved oxygen, temperature), sediment composition, total protein, and extracellular enzyme activity (alkaline phosphatase). Additionally, these data contain some previously unpublished longer term continuous pH data from the Colorado River. These data were primarily collected in the summer of 2021, before, during, and immediately following incubations of three different sediment types with Colorado river water. Sediment and overlying water for incubations were collected at one time point from three sites: the Paria River near the confluence with the Colorado River, the Colorado River approximately 23 river kilometers below Glen Canyon Dam, and the Colorado River near its inflow to Lake Mead at the Pearce Ferry boat ramp. Data were collected by the Southwest Biological Science Center-Grand Canyon Monitoring and Research Center researchers. These ambient river water and sediment data can be used to describe chemical and biological conditions in the river and data from bottle incubations can be used to examine how changing laboratory conditions affect nutrient availability and cycling.

鲍威尔湖（Lake Powell）可截留其接收的绝大多数磷，进而引发下游河段的磷限制效应。本数据集的汇编旨在探究科罗拉多河鲍威尔湖下游河段的磷循环调控机制，以及帕里亚河（Paria River）暴雨径流输入对磷循环的影响。本研究的目标为明确不同溶解氧浓度与pH值条件下，各类有机与无机磷形态的循环过程，该参数范围覆盖了该河段历年监测所得的数值区间。本次数据集涵盖氮、磷、钙、碳的浓度数据，pH、溶解氧、水温等水质参数，沉积物组成数据，总蛋白含量以及胞外酶活性（碱性磷酸酶（alkaline phosphatase））。此外，数据集还包含此前未公开的科罗拉多河长期连续pH监测数据。本数据集主要采集于2021年夏季，涵盖三种不同沉积物与科罗拉多河水的培养实验前后及实验期间的数据。用于培养实验的沉积物与上覆水样本，均于同一时间点从三个采样点采集：帕里亚河与科罗拉多河汇流处附近、格伦峡谷大坝下游约23河公里的科罗拉多河河段，以及皮尔斯渡轮码头附近、科罗拉多河注入米德湖（Lake Mead）前的河段。本数据集由西南生物科学中心-大峡谷监测与研究中心（Southwest Biological Science Center-Grand Canyon Monitoring and Research Center）的研究人员采集。本次采集的原位河水与沉积物数据可用于描述该河段的化学与生物环境状况，而瓶内培养实验数据则可用于探究实验室环境变化如何影响营养盐的生物可利用性与循环过程。