This README_Hu et al. 2022Data.txt file was generated on 2022-2-25 by Yu-Kun Hu GENERAL INFORMATION 1. Title of Dataset: Data from: Contrasting nitrogen cycling between herbaceous wetland and terrestrial ecosystems inferred from plant and soil nitrogen isotopes across Chin. 2. Author Information Corresponding Investigator Name: Dr Yu-Kun Hu Institution: Institute of Wetland Research, Chinese Academy of Forestry Email: ykhu2012@gmail.com Co-investigator 1 Name: Dr Guo-Fang Liu Institution: Institute of Botany, Chinese Academy of Sciences Co-investigator 2 Name: Dr Xu Pan Institution: Institute of Wetland Research, Chinese Academy of Forestry Co-investigator 3 Name: Dr Yao-Bin Song Institution: Hangzhou Normal University Email: ybsong@hznu.edu.cn Co-investigator 4 Name: Prof Ming Dong Institution: Hangzhou Normal University Email: dongming@hznu.edu.cn Co-investigator 5 Name: Prof Johannes H. C. Cornelissen Institution: Vrije Universiteit Amsterdam 3. Date of data collection: 2012-2015 4. Geographic location of data collection: China 5. Funding sources that supported the collection of the data: National Natural Science Foundation of China 6. Recommended citation for this dataset: Hu, Y.-K., Liu, G.-F., Pan, X., Song, Y.-B., Dong, M., & Cornelissen, J.H.C. (2022). Data from: Contrasting nitrogen cycling between herbaceous wetland and terrestrial ecosystems inferred from plant and soil nitrogen isotopes across China. Dryad Digital Repository. DATA & FILE OVERVIEW 1. Description of dataset These data were generated to investigate the differences in nitrogen cycling between herbaceous wetland and terrestrial ecosystems across wide environmental gradients. The dataset include leaf isotopes values of 346 vascular plants and soil isotope values from 152 sampling plots in wetland and terrestrial systems across China. Community-level nitrogen isotope values, i.e. species abundance-weighted δ15N, were also include in the dataset. 2. File List: File 1 Name: Species-level N isotope values.xlsx File 1 Description: This file includes plant species N isotope values, soil N isotope values, climatic factors and soil properties at each sampling plot. File 2 Name: Community-level N isotope values.xlsx File 2 Description: This file include the data of community-weighted means of leaf N isotopes for each plot. File 3 Name: N isotope values from the literature.xlsx File 3 Description: This file include the data for Figure 6 in Hu et al. 2022 J Ecol. They are N isotope values of wetland water, wetland soil and river water collected from the literature. METHODOLOGICAL INFORMATION A large-scale field investigation was carried out during 2012-2014 on 26 pairs of terrestrial-wetland herbaceous plant communities over a wide range of environmental conditions across China. The natural abundance of 15N was determined for all dominant and subordinate plant species and surrounding soils within each plant community. Besides, community-level nitrogen isotope values (species abundance-weighted) were calculated. In addition, data for functional types (including N2-fixing status and mycorrhizal types) were obtained from recently published literature based on the data for species and then for genus. More details can be seen in the Materials and Methods in Hu et al. 2022 J Ecol. DATA-SPECIFIC INFORMATION FOR: Species-level N isotope values.xlsx 1. Number of variables: 22 2. Number of cases/rows: 1575 3. Variable List: Site: 26 study sites in total Plot: 152 plots used for investigation and sampling Ecosystem type: Wetland and terrestrial ecosystems Latitude: Ranging from 24.92°N to 46.31°N Longitude: Ranging from 83.33°E to 123.03°E MAT: Mean annual temperature MAP: Mean annual precipitation Soil pH: Soil pH values Soil electrical conductivity: ms/cm Soil C:N: The ratio of soil carbon content to nitrogen contents Soil organic C: Soil organic carbon content Soil total N: Soil total nitrogen content (mg/g) Soil total P: Soil total phosphorus content (mg/g) Soil available N: Soil available nitrogen content (mg/kg) Soil available P: Soil available phosphorus content (mg/kg) Soil δ15N: Soil nitrogen isotope values Species: 346 vascular plants species sampled Genus: The genus for each plant species Family: The family of each plant species Mycorrhizal type: The mycorrhizal type of each plant species (AM, ECM,ERM,NM) N2-fixing status: The N2-fixing status of each species (Yes/No) Leaf δ15N: Plant leaf nitrogen isotope values (‰) 4. Missing data codes: NA 5. Abbreviations used: N/A; not applicable 6. Other relevant information: None. DATA-SPECIFIC INFORMATION FOR: Community-level N isotope values.xlsx 1. Number of variables: 9 2. Number of cases/rows: 152 3. Variable List: Site: 26 study sites in total Plot: 152 plots used for investigation and sampling Ecosystem type: Wetland and terrestrial ecosystems Latitude: Ranging from 24.92°N to 46.31°N Longitude: Ranging from 83.33°E to 123.03°E MAT: Mean annual temperature MAP: Mean annual precipitation Soil δ15N: Soil nitrogen isotope values Leaf δ15N: Abundence-weighted values of leaf nitrogen isotope for plant speceis within each plot (‰) 4. Missing data codes: NA 5. Abbreviations used: N/A; not applicable 6. Other relevant information: None. DATA-SPECIFIC INFORMATION FOR: N isotope values from the literature.xlsx 1. Number of variables: 6 2. Number of cases/rows: 97 3. Variable List: Wetland name: The name of wetlands Component: The compartment of wetland that nitrogen come from (wetland soil, wetland water, urban river water and non-urban river water) δ15N: Stable nitrogen isotope values Site: The sampling plots Period: The time when the sampling was performed Reference: The literature from which the data were obtained 4. Missing data codes: N/A; not applicable 5. Abbreviations used: N/A; not applicable 6. Other relevant information: None.