出版社：Forestry Commission of the Hungarian Academy of Sciences
摘要：In the last few decades the climate of Síkf kút ILTER Forest (Hungary) became warmer and dryer. Due to the climate change the species composition of forest has been changing, and the total leaf litter production has been slightly decreasing. According to our long-term litter manipulation field experiment, which is part of ILTER Detritus Input and Removal Treatments (DIRT) Project, after a 4-5 year treating period, at the No Litter, No Root and No Input treatments the soil organic C and N content, the soil bacterial and fungal count, the soil pH, the soil enzyme activity, and soil respiration decreased. Increased soil temperature raises soil respiration exponentially, and thus if the average soil temperature increased by 2oC at the dry Síkf kút site, soil respiration would increase by 22.1%. This increase would be higher (29.9%) at a wet site, such as Harvard Forest in the USA. Increasing soil respiration can speed up global warming through a positive feedback mechanism
