Leaf and root phenology and biomass of <i>Eriophorum vaginatum</i> in response to warming in the Arctic

Abstract The response of plant leaf and root phenology biomass in the Arctic to global change remains unclear due lack synchronous measurements above- belowground parts. Our objective was determine phenological dynamics parts Eriophorum vaginatum its warming. We established a common garden located at Toolik Lake Field Station; tussocks E. from three locations, Coldfoot, Sagwon, were transplanted into garden. Control warming treatments for set up during growing seasons 2016 2017. Digital cameras, handheld sensor minirhizotrons used simultaneously observe greenness, normalized difference vegetation index length dynamics, respectively. Leaf growth rates asynchronous such that timing maximal (mid-July) about 28 days earlier than growth. Warming air temperature by 1 °C delayed senescence thus prolonged season, but increase had no significant effect on phenology. seasonal affected temperature, whereas correlated with soil thaw depth. Therefore, we suggest components should be considered comprehensively when using carbon nutrient cycle models, as productivity functional traits may have different climate