DOI: 10.5061/dryad.8w9ghx3t9
title: Data from: Opposing responses of temporal stability of aboveground and belowground net primary productivity to water and nitrogen enrichment in a temperate grassland

description: 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.
description: # Data from: Opposing responses of temporal stability of aboveground and
 belowground net primary productivity to water and nitrogen enrichment in a
 temperate grassland ##
 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.