PMID- 36240924 OWN - NLM STAT- MEDLINE DCOM- 20221201 LR - 20221201 IS - 1879-1026 (Electronic) IS - 0048-9697 (Linking) VI - 857 IP - Pt 1 DP - 2023 Jan 20 TI - Effects of multi-resource addition on grassland plant productivity and biodiversity along a resource gradient. PG - 159367 LID - S0048-9697(22)06466-X [pii] LID - 10.1016/j.scitotenv.2022.159367 [doi] AB - The change of plant biodiversity caused by resource-enhancing global changes has greatly affected grassland productivity. However, it remains unclear how multi-resource enrichment induces the effects of multifaceted biodiversity on grassland productivity under different site resource constraints. We conducted a multiple resource addition (MRA) experiment of water and nutrients at three sites located along a resource gradient in northern China. This allowed us to assess the response of aboveground net primary productivity (ANPP), species (species richness and plant density), functional (functional richness and community-weighted mean of traits) and phylogenetic (phylogenetic richness) diversity to increasing number of MRA. We used structural equation model (SEM) to examine the direct and indirect effects of MRA and multifaceted biodiversity on ANPP. The combined addition of the four resources increased ANPP at all three sites. But with increasing number of MRA, biodiversity varied at the three sites. At the high resource constraint site, species richness, plant density and leaf nitrogen concentration (LNC) increased. At the medium resource constraint site, plant height and LNC increased, leaf dry matter content (LDMC) decreased. At the low resource constraint site, species, functional and phylogenetic richness decreased, and height increased. The SEM showed that MRA increased ANPP directly at all three sites, and indirectly by increasing plant density at the high constraint site and height at the medium constraint site. Independent of MRA, ANPP was affected by height at the high resource constraint site and LNC at the low resource constraint site. Our results illustrate that multi-resource addition positively affects productivity, while affects biodiversity depending on site resource constraint. The study highlights that site resource constraint conditions need to be taken into consideration to better predict grassland structure and function, particularly under the future multifaceted global change scenarios. CI - Copyright (c) 2022 Elsevier B.V. All rights reserved. FAU - Guo, Xinxin AU - Guo X AD - Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: guoxinxin@lzb.ac.cn. FAU - Zuo, Xiaoan AU - Zuo X AD - Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China; Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Lanzhou 730000, China. Electronic address: zuoxa@lzb.ac.cn. FAU - Medina-Roldan, Eduardo AU - Medina-Roldan E AD - Institute of BioEconomy-National Research Council (IBE-NRC), 50019 Sesto Fiorentino, Italy. FAU - Guo, Aixia AU - Guo A AD - Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China. FAU - Yue, Ping AU - Yue P AD - Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China; Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Lanzhou 730000, China. Electronic address: yueping@lzb.ac.cn. FAU - Zhao, Xueyong AU - Zhao X AD - Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China; Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Lanzhou 730000, China. Electronic address: zhaoxy@lzb.ac.cn. FAU - Qiao, Jingjuan AU - Qiao J AD - Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China. FAU - Li, Xiangyun AU - Li X AD - Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: lixiangyun19@mails.ucas.ac.cn. FAU - Chen, Min AU - Chen M AD - Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China; Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Lanzhou 730000, China. FAU - Wei, Cunzheng AU - Wei C AD - State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China. Electronic address: weicunzheng@ibcas.ac.cn. FAU - Yang, Tian AU - Yang T AD - National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China. FAU - Ke, Yuguang AU - Ke Y AD - National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China. FAU - Yu, Qiang AU - Yu Q AD - School of Grassland Science, Beijing Forestry University, Beijing 100083, China. Electronic address: yuq@bjfu.edu.cn. LA - eng PT - Journal Article DEP - 20221011 PL - Netherlands TA - Sci Total Environ JT - The Science of the total environment JID - 0330500 SB - IM MH - *Biodiversity MH - Biomass MH - Ecosystem MH - *Grassland MH - Phylogeny MH - *Plants MH - China MH - Population Density OTO - NOTNLM OT - Functional diversity OT - Phylogenetic diversity OT - Resource constraint OT - Species diversity OT - Temperate grassland COIS- Declaration of competing interest The authors declare that they have no known competing financial interests, or personal relationships that could have appeared to influence the work, reported in this paper. EDAT- 2022/10/15 06:00 MHDA- 2022/11/30 06:00 CRDT- 2022/10/14 19:24 PHST- 2022/07/22 00:00 [received] PHST- 2022/09/23 00:00 [revised] PHST- 2022/10/07 00:00 [accepted] PHST- 2022/10/15 06:00 [pubmed] PHST- 2022/11/30 06:00 [medline] PHST- 2022/10/14 19:24 [entrez] AID - S0048-9697(22)06466-X [pii] AID - 10.1016/j.scitotenv.2022.159367 [doi] PST - ppublish SO - Sci Total Environ. 2023 Jan 20;857(Pt 1):159367. doi: 10.1016/j.scitotenv.2022.159367. Epub 2022 Oct 11.