Differential Responses of Soil Extracellular Enzyme Activities to Salinization: Implications for Soil Carbon Cycling in Tidal Wetlands

Rising sea levels are expected to cause salinization in many historically low-salinity tidal wetlands. However, the response of soil extracellular enzyme activities wetlands and their links organic carbon (SOC) decomposition largely unknown. Here, we conducted a global meta-analysis examine effect on hydrolytic oxidative carbon-acquiring relationships with SOC storage The results showed that reduced by 33% but increased 15%. Meanwhile, decreased 14%, change was negatively associated activities. These indicate an important role for enzymes loss Moreover, logarithmically declined increasing salinization, implying highly sensitive even minor increases salinity at initial stage salinization. Given over time rising most wetlands, our suggest might be greater during early than later stages. Consequently, salinization-induced may overstated long term if extrapolations merely based constant rate determined from short-term studies. Future modeling frameworks should account this changing sensitivity microbially mediated time.