Basdediós, Nuria; Wu, Yanhong; Wilcke, Wolfgang: Stable Mg isotope ratios and major and trace elements in tree compartments and organic horizon along the 127-year Hailuogou glacier retreat chronosequence (SW China) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.987472 (dataset in review)
Abstract:
We determined δ26Mg values in the dominant tree species and organic layer along the 127 year-old Hailuogou glacial retreat chronosequence (southwest China), which is characterized by rapid ecosystem development from bare soil to a mature, conifer-dominated forest, in order to assess whether stable Mg isotope ratios reflect the increasing incorporation of Mg into biotic cycles with advancing vegetation succession. The dataset was complemented with measurements of major (N, Ca, Mg, and K) and trace element concentrations (V, Co, Rb, Sr, Ba, Fe, and Ni). Samples were collected from five ecosystem succession stages, which were exposed for 37, 47, 59, 87, and 127 years since glacier retreat. Each ecosystem succession stage was sampled in triplicate (i.e., 15 plots in total), as described in Basdediós et al. (2022). At each plot, we collected fresh leaves, 1 yr-old needles, 3 yr-old needles, branches, and roots of the dominant tree species between August and October 2017. To ensure representative sampling, a minimum of three trees were randomly selected from each plot and combined into a single composite sample. Four species were sampled along the chronosequence, including Hippophae tibetana Schltdl (37 yr-old site), Populus purdomii Rehder (47 yr-old site), Abies fabri (Mast.) Craib (59 and 87 yr-old site), and Picea brachytyla (Franch.) E. Pritz (127 yr-old site). Additionally, we collected leaves/needles of P. purdomii at the 59 yr-old site, and A. fabri at the 47 and 127 yr-old sites, which were the second most abundant tree species at those sites. For Mg isotope analysis, aliquots of the organic horizons (Oi, Oe and Oa) were thickness-weighted to a composited sample per plot.
Keyword(s):
Related to:
Basdediós, Nuria; Zhong, Zhilin; Wu, Yanhong; Wilcke, Wolfgang (2022): Initial carbonate weathering is linked with vegetation development along a 127-year glacial retreat chronosequence in the subtropical high mountainous Hailuogou region (SW China). Plant and Soil, 471(1-2), 609-628, https://doi.org/10.1007/s11104-021-05250-y
Funding:
Coverage:
Latitude: 29.568439 * Longitude: 101.996837
Date/Time Start: 2017-08-08T00:00:00 * Date/Time End: 2017-08-08T00:00:00
Minimum Elevation: 2900.0 m * Maximum Elevation: 2900.0 m
Event(s):
HLG2017 * Latitude: 29.568439 * Longitude: 101.996837 * Date/Time: 2017-08-08T00:00:00 * Elevation: 2900.0 m * Campaign: HLG2017
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Wilcke, Wolfgang | |||
| 2 | Stand age | Stand age | a | Wilcke, Wolfgang | ||
| 3 | Plot | Plot | Wilcke, Wolfgang | |||
| 4 | Sample type | Samp type | Wilcke, Wolfgang | Branches, leaves, 1-yr and 3-yr old needles, roots, organic layer | ||
| 5 | Species | Species | Wilcke, Wolfgang | |||
| 6 | δ26Mg | δ26Mg | ‰ | Wilcke, Wolfgang | Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS), ThermoFisher Scientific, Neptune Plus | δ26Mg [‰ DSM3] values |
| 7 | δ26Mg, standard deviation | δ26Mg std dev | ± | Wilcke, Wolfgang | 2 * standard error of the mean | |
| 8 | Number of measurements | n | # | Wilcke, Wolfgang | Number of measurements performed within the same analytical session | |
| 9 | Δ25Mg' | Δ25Mg' | Wilcke, Wolfgang | Calculated according to Young and Galy (2004) | ||
| 10 | Magnesium | Mg | mg/g | Wilcke, Wolfgang | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Agilent, 5100 | |
| 11 | Calcium | Ca | mg/g | Wilcke, Wolfgang | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Agilent, 5100 | |
| 12 | Potassium | K | mg/g | Wilcke, Wolfgang | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Agilent, 5100 | |
| 13 | Nitrogen | N | mg/g | Wilcke, Wolfgang | EA-IRMS, Thermo Scientific, EA Flash 2000 HT Plus, IRMS Delta V Advantage | |
| 14 | Vanadium | V | mg/kg | Wilcke, Wolfgang | Inductively coupled plasma mass spectrometer (ICP-MS), Agilent, 7900 | |
| 15 | Cobalt | Co | mg/kg | Wilcke, Wolfgang | Inductively coupled plasma mass spectrometer (ICP-MS), Agilent, 7900 | |
| 16 | Rubidium | Rb | mg/kg | Wilcke, Wolfgang | Inductively coupled plasma mass spectrometer (ICP-MS), Agilent, 7900 | |
| 17 | Strontium | Sr | mg/kg | Wilcke, Wolfgang | Inductively coupled plasma mass spectrometer (ICP-MS), Agilent, 7900 | |
| 18 | Barium | Ba | mg/kg | Wilcke, Wolfgang | Inductively coupled plasma mass spectrometer (ICP-MS), Agilent, 7900 | |
| 19 | Iron | Fe | mg/kg | Wilcke, Wolfgang | Inductively coupled plasma mass spectrometer (ICP-MS), Agilent, 7900 | |
| 20 | Nickel | Ni | mg/kg | Wilcke, Wolfgang | Inductively coupled plasma mass spectrometer (ICP-MS), Agilent, 7900 |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1474 data points