Decoupling of soil nitrogen and phosphorus dynamics along a temperature gradient on the Qinghai-Tibetan Plateau

•Soil N content and N storage decrease with increasing temperature.•Soil P content and P stocks keep stable with increasing temperature.•Soil N and P dynamics are decoupled under the condition of increasing temperature.•Soil property and vegetation type influence soil N dynamic.•Soil P dynamic is affected by soil silt, precipitation, vegetation and soil type.