Data from: Dynamics of phosphorus pools in drainage ditch sediments within an agricultural catchment
Data files
Dec 05, 2025 version files 2.49 MB
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Data_DrainageDitch_2021_csv.csv
2.49 MB
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README.md
1.83 KB
Abstract
Hydrological dynamics in drainage ditch sediments may impact phosphorus (P) retention and its potential (re-)release to connected waters. We aimed at understanding the fate of P in drainage-ditch sediments under dynamic environmental conditions (i.e., drying-rewetting cycles) by examining P pool transformations through an isotopic labelling and incubation experiment. Fresh sediment samples of a drainage ditch were labeled with 18O-enriched inorganic P (Pi), followed by a twenty-four-week incubation under different environmental conditions. A five-step sequential extraction scheme was combined with δ18O analysis of Pi (δ18O Pi) to follow changes in the operationally defined P pools. Few P pools showed significant changes, but time-resolved results revealed a dynamic interplay between redox conditions, microbial activity, and P dynamics. A subsequent decline in microbial P concentrations suggested cell death and reduced microbial activity, likely caused by hydrological stress. The δ18OPi values in surface-adsorbed pools retained traces of the original Pi label after twenty-four weeks, allowing tracking of long-term P transformations and distinguishing biological and geochemical reactions.
Authors: Christiane Nagel, Harald Neidhardt, Yvonne Oelmann
Description: This dataset represents the results of an isotope-labelling and laboratory incubation experiment aiming to reveal dynamics of phosphorus pools in drainage-ditch sediments.
The data were checked for normal distribution (Shapiro-Wilk test, p > 0.05) and homogeneity of variances (Levene´s test; p > 0.05). Repeated Measures ANOVA was used to test differences within a treatment across the different time points (significance level: 0.05). One-way ANOVA was used to test differences between the treatments for each of the dependent variables (P pools, Pmic, APA, Δ18OPi). A non-parametric LSD post-hoc test (Least Significant Difference) was applied if required. To determine mean differences between two pairs or time points, a paired t-test was used.
Files:
Data_DrainageDitch_2021_csv.csv
Data folder: Includes five spreadsheets with general information and the data measured in the incubation experiment. Note: N/A means not applicable or missing data.
- Experimental overview: Includes description of the experimental setup and data analysis consideration.
- Parameter info: Includes information of acronyms used, measured data with calculations and devices used and related references.
- Processed Data: Includes calculated data from raw data with minimum, maximum, mean and standard deviation.
- Raw data: Includes all values of the real triplicates measured during the experiment.
- Temperature and Redox data: Includes Temperature and Redox data from electrodes measured during the experiment.
Code/Software:
Statistical analyses were conducted in Excel (version 1808, 2019 MSO) and SPSS (IBM SPSS Statis-tics, Version 29).