Data from: Opposing responses of temporal stability of aboveground and belowground net primary productivity to water and nitrogen enrichment in a temperate grassland
Data files
Dec 02, 2023 version files 6.16 KB
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README.md
2.35 KB
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Stability_Dataset.csv
3.81 KB
Abstract
Changes in water and nitrogen availability, as important elements of global environmental change, are known to affect the temporal stability of aboveground net primary productivity (ANPP). However, evidences for their effects on the temporal stability of belowground net primary productivity (BNPP), and whether such effects are consistent between belowground and aboveground, are rather scarce. Here, we investigated the responses of temporal stability of both ANPP and BNPP to water and nitrogen addition based on a 9-year manipulative experiment in a temperate grassland in northern China. The results showed that the temporal stability of ANPP increased with water addition but decreased with nitrogen addition. By contrast, the temporal stability of BNPP decreased with water addition but increased with nitrogen enrichment. The temporal stability of ANPP was mainly determined by the soil moisture and inorganic nitrogen, which modulated species asynchrony, as well as by the stability of dominant species. On the other hand, the temporal stability of BNPP was mainly driven by the soil moisture and inorganic nitrogen that modulated ANPP of grasses, and by the direct effect of soil water availability. Our study provides the first evidence on the opposite responses of aboveground and belowground grassland temporal stability to increased water and nitrogen availability, highlighting the importance of considering both aboveground and belowground components of ecosystems for a more comprehensive understanding of their dynamics.
https://doi.org/10.5061/dryad.8w9ghx3t9
Description of the data and file structure
The uploaded files include a .R script file and a .csv file for the data.
The R codes include the codes and results used for the structural equation model (SEM).
The .csv file includes variables calculated across the sampling period (2007-2013) (Stability_Dataset.csv).
Description of variables included in SEM_final.csv:
* Block (categorical data): Block
* W (categorical data): Water addition treatment, W0 for ambient precipitation and W1 for addition of 180 mm yr-1;
* N (categorical data): Nitrogen addition treatment, N0 for ambient nitrogen and N1 for addition of 10 g N m-2 yr-1;
* SM (continuous data): Mean soil moisture;
* sqrtIN (continuous data): Sqrt-transformed mean soil inorganic nitrogen concentration;
* ANPP (continuous data): Mean community aboveground net primary productivity;
* SD_ANPP (continuous data): Standard deviation of ANPP;
* ANPP_grasses (continuous data): Mean ANPP of grasses;
* lnANPP_grasses (continuous data): ln-transformed mean ANPP of grasses;
* ANPP_forbs (continuous data): Mean ANPP of forbs;
* BNPP (continuous data): Mean belowground net primary productivity;
* lnBNPP (continuous data): ln-transformed BNPP;
* SD_BNPP (continuous data): Standard deviation of BNPP;
* BNPP_00_10 (continuous data): Mean BNPP at 00-10 cm depth of soil;
* BNPP_10_20 (continuous data): Mean BNPP at 10-20 cm depth of soil;
* BNPP_20_40 (continuous data): Mean BNPP at 20-40 cm depth of soil;
* sqrtRichness (continuous data): Sqrt-transformed mean species richness;
* arsinAsy (continuous data): Arsin-transformed species asynchrony;
* Dominant_Sta (continuous data): Temporal stability of dominant species;
* lnSta_ANPP (continuous data): ln-transformed temporal stability of ANPP;
* sqrtSta_BNPP (continuous data): Sqrt-transformed temporal stability of BNPP;
* AGP_stipa（continuous data): Mean aboveground production (AGP) of S. krylovii;
* AGP_stipa% (continuous data): Mean percentage AGP of S. krylovii;
Code/Software
All R codes and results used in the manuscript were shown in the uploaded .R script.