Nutrient addition and warming alter the soil phosphorus cycle in grasslands: A global meta-analysis

Effects of Soil Warming on Soil Microbial Metabolism Limitation in a Quercus acutissima Forest in North Subtropical China

“…However, the limiting factors of soil microbial nutrients under warming conditions in different regions are still unclear. In this study, the lnBG: ln(NAG+LAP): lnACP of soil in the north subtropical Q. acutissima forest was about 1:1.57:2.89, which was different from the global average of 1:1:1 [39,41], indicating that N and P elements available to soil microorganisms in the study area were relatively lacking. A serious north subtropical soil microbial P limit has been confirmed, because the soil P element mainly comes from rock weathering, and the rainfall erosion and soil erosion soil P element loss [51], and in the north subtropical acid soil metal ion binding ability is strong, and availability P element is easily incorporated into the stability of the closed state storage P. The utilization rate of the P element is reduced [50,51].…”

“…This may be because pH regulates soil enzyme activities by influencing the soil microbial community structure, the binding state between enzymes and soil particles, soil nutrients, and soil functions [40]. In addition, the warming time of this experiment is relatively short, and long-term warming experiments usually exceed 10 years [35,41,42]. In the future, we will focus on exploring the coupling relationship between soil enzyme activities and seasonal dynamic changes in temperature and duration of warming.…”

“…In contrast to soil N, P supply in soil is controlled by a combination of biotic and abiotic (adsorption/desorption and dissolution) processes [46]. Usually, soil warming promotes the uptake of phosphorus by surface plants, increases the content of litter phosphorus, and reduces soil available phosphorus [41,47]. However, as the Q. acutissima forest in the experimental area of this study belongs to an overmature forest, short-term warming of 1 year may not affect its growth.…”

“…Soil microbes can regulate soil nutrient availability, and the change in soil temperature will affect the soil microbial community and activity, thereby affecting the process of nutrient absorption and release [41]. Therefore, there is a close relationship between soil microbial nutrient limitation and soil nutrient availability.…”

Response of soil extracellular enzyme activity and stoichiometry to short-term warming and phosphorus addition in desert steppe

“…Since 1850–1900, the temperature of the atmosphere has risen by around 1.1 °C, and it is predicted to rise by another 1.5–2.0 °C or more in the future ( IPCC et al, 2021 ). Climate warming may alter the availability of soil nutrients ( Feike et al, 2012 ; Hu et al, 2022 ), and soil microbes secrete extracellular enzymes in response to the variation of soil nutrients ( Raiesi & Salek-Gilani, 2018 ; Cui et al, 2019a ). Soil extracellular enzymes mediate the decomposition of soil organic matter and nutrient cycling, affecting the function of ecosystem services ( Güsewell, 2004 ; Hu et al, 2016 ).…”