Carbon and nitrogen dynamics in subsoils after 20 years of added precipitation in a Mediterranean grassland

Precipitation is a major driver of ecosystem change and the physicochemical characteristics of soil. Under different climate change scenarios, increased drought frequency and changing precipitation are predicted to impact Mediterranean ecosystems, including in Northern California. Studies based on two major climate models examined the impact of increased precipitation in parts of California, where the additional precipitation occurred during winter or spring months. It was found that altering precipitation seasonality has significant impacts on plant community dynamics, microbial and fungal dynamics, and abiotic soil processes. Subsoils are large carbon reservoirs. However, most studies investigating precipitation effects on soil organic matter (SOM) primarily focus on near-surface soils. Recent studies indicated different responses to environmental perturbation in surface (<30 cm) versus deep soils (>30 cm) due to important differences in physicochemical characteristics. Here, we..., , # Carbon and nitrogen dynamics in subsoils after 20 years of added precipitation in a Mediterranean grassland

There are 4 xlsx files associated with this dataset:

* Sample_Metadata_Precipitation_Expt.xlsx gives associated metadata with each sample ID. This metadata includes the location where it was sampled, the replicate, the depth, and so on.

- FTIR_elemental_data_merged.csv gives all the isotopic, elemental, and FTIR data associated with each sample ID. NAs refer to missing or lacking data. This data sheet partially represents data that comes out of the Stable Isotope Ecosystem Laboratory at UC Merced, with metadata attached for each sample. The measurements included in this datasheet (C% and N%) make it possible to calculate carbon stocks, an important bulk density-corrected factor, for each site. Measurements of stable isotopes δ13CC andδ15NN were also important markers of decomposition and turnover for the sites we were analyzing. This isotopic and elemental base has been merge...,