Nutrients (N, P, K, Na) and warming affect heterotrophic respiration in temperate forest litter

Abstract At present, ecosystems are facing changes caused by global warming and anthropogenic impacts on geochemical cycles. Both temperature nutrient availability affect litter decomposition; however, little is known about their simultaneous effect decomposition in temperate forests, especially for nutrients such as Na K. To address this perspective, we investigated how N, P, K supply increased measured respiration. Moreover, the study determines what can be expected functioning of two forest types different fertility (deciduous coniferous). The respiration measurements were conducted laboratory mesocosms filled with from deciduous (oak-hornbeam) coniferous (mixed pine-oak) forests fertilized K, Na. experiment was at ambient (14 °C; oak-hornbeam mixed pine-oak litter) temperatures (22 litter). increasing temperature, Q 10 values ranging 1.49 to 2.14. Our results showed responses addition between types. In oak-hornbeam, 14 °C, P decreased respiration, whereas 22 an noted only under N application, after addition, other had no effect. Together, our suggest that forecasting impact deposition ecosystem should consider rise a factor altering fertilization future research.