Comparative Resistance and Resilience of Soil Microbial Communities and Enzyme Activities in Adjacent Native Forest and Agricultural Soils

摘要: Degradation of soil properties following deforestation and long-term cultivation may lead to decreases in microbial diversity functional stability. In this study, we investigated the differences stability (resistance resilience) community composition enzyme activities adjacent soils under either native tropical forest (FST) or agricultural cropping use for 14 years (AGR). Mineral samples (0 5 cm) from both areas were incubated at 40°C, 50°C, 60°C, 70°C 15 min order successively reduce biomass. Three 30 days after heat shocks, fluorescein diacetate (FDA) hydrolysis, cellulase laccase activities, phospholipid-derived fatty acids-based measured. Microbial biomass was reduced up 25% 3 shocks. The higher initial values biomass, activity, total particulate organic carbon, aggregate FST coincided with enzymatic FDA hydrolysis activity less affected (more resistance) recovered more rapidly relative AGR counterpart. soil, did not show resilience any shock level disturbance. Within each type, differ between control day 3. However, 30, treated 60°C contained a significantly different lower regardless high resilience. Results study that followed by changed had differential effects on Both displayed similar composite measure broad range hydrolases, supporting concept redundancy communities. contrast, substrate-specific soils, indicating diverse microorganisms capable producing these enzymes confirming specific functions are sensitive measurements evaluating change ecological soils.