Phosphorus Enrichment Increased Community Stability by Increasing Asynchrony and Dominant Species Stability in Alpine Meadow of Qinghai‐Tibet Plateau

Abstract

Song et al., 2019). Moreover, most studies on the ecosystem response to P increasing have focused on tropical, ancient, or highly biodiversity areas. The effects of P enrichment on ecosystem stability in cold and high-altitude ecosystems are less known (Soons et al., 2017).Nitrogen is closely related to plant metabolism and growth (Mitra, 2015). N deficiency will weaken plant photosynthesis, while N sufficiency will promote rapid plant growth (Wang et al., 2017;Yue et al., 2020). It is widely recognized that N enrichment reduces the plant species diversity (

Asymmetric response of aboveground and belowground temporal stability to nitrogen and phosphorus addition in a Tibetan alpine grassland

“…The rates of nitrogen and phosphorus addition and the duration of the study period in our research are comparable to many previously reported nutrient addition experiments that primarily focused on the responses of aboveground stability (e.g., Hautier et al, 2014Hautier et al, , 2015Wang, Jiang, et al, 2022;Yang et al, 2012;Zhang et al, 2016). However, our findings demonstrate that the aboveground and belowground stability had asymmetric responses, indicating that the prevalently investigated aboveground S6.…”

“…These findings remained unchanged when using the 4-year paired measurements of ANPP and BNPP (Appendix S1). These results indicate that the decrease in belowground stability can lead to a decline in the stability of TNPP, highlighting the whole ecosystem-scale consequences that were previously unknown due to the predominant focus on the aboveground stability (e.g., Wang, Jiang, et al, 2022;Yang et al, 2012). These findings also indicate that investigations solely focused on the aboveground stability are insufficient to reflect the ecological consequences of enriched nutrients.…”

“…Consequently, the community CV may be strongly driven by that of abundant species or plant functional group(s) (Ma et al, 2017;Wang, Niu, et al, 2020;Wang, Jiang, et al, 2022). Therefore, it is worth examining whether enriched nutrients affect the CV of abundant species or plant functional group(s) by influencing their species diversity and/or species dynamics.…”

“…The insurance hypothesis (Yachi & Loreau, 1999) predicts that low species diversity would increase the species synchrony because of the decreased probability of containing dissimilarly responding species, leading to low ecosystem stability (e.g., Hautier et al, 2014Hautier et al, , 2015Hautier et al, , 2020Ma et al, 2023;Wang, Jiang, et al, 2022;Yang et al, 2012). However, the mass ratio hypothesis holds that abundant species could be more important for maintaining ecosystem functions and stability (Grime, 1998).…”

“…stability responses (e.g., Hautier et al, 2014Hautier et al, , 2015Wang, Jiang, et al, 2022;Yang et al, 2012;Zhang et al, 2016) cannot accurately predict responses of belowground stability. Moreover, we even found that the stability of TNPP was largely regulated by that of BNPP and independent from that of ANPP (Figure 4).…”