Data from "Removal of grazers alters the response of tundra soil carbon to warming and enhanced nitrogen availability", Ecological Monograps in October 2019 ...

• Main Authors: Ylänne, Henni, Kaarlejärvi, Elina, Väisänen, Maria, Männistö, Minna K, Ahonen, Saija H. K., Olofsson, Johan, Stark, Sari
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: Kaarlejärvi; Männistö; Norway; Väisänen; Northern Norway; permafrost; Tundra
• Online Access: https://dx.doi.org/10.5061/dryad.69p8cz8xb; https://datadryad.org/stash/dataset/doi:10.5061/dryad.69p8cz8xb

Here we present the data used in the manuscript "Removal of grazers alters the response of tundra soil carbon to warming and enhanced nitrogen availability", Ecological Monograps, Early view in October 2019 by H. Ylänne, E. Kaarlejärvi, M. Väisänen, M. K. Männistö, S. H. K. Ahonen, J. Olofsson & S. Stark. In this paper we studied, how five years of experimental warming and increased soil nitrogen availability interact with both long- and short-term differences in grazing intensity in shaping ecosystem carbon stocks and the processes underlying the changes. We used an over 50-year-old reindeer fence that separates a lightly grazed shrub-dominated tundra from a heavily grazed graminoid-dominated tundra, where the different grazing histories on the two sides of the fences have created different ecosystem states. In addition to the long-term grazing difference, we also established short-term grazer exclosures on the heavily grazed side of the fence to account for the effect of a sudden grazing cessation. ... : Experimental set-up and site characteristics The data is from an experimental set-up, created in 2010 to a tundra heath on the northern slope of a hill Raisduoddar in northern Norway (69°31’29 N, 21°19’16 E; altitude 430–570 m a.s.l.). This is in a non-permafrost area with glacial tills as the dominant mineral soil type. Only weak podzolic profiles are developed and a continuous soil organic layer of approximately 4.25 cm is found above the mineral soil layer. The area is bisected by a reindeer pasture rotation fence, that has been in place at least since 1966, therby creating a legal border between the reindeer summer ranges and their migration range. The summer range side of the fence experiences heavy grazing (HG) intensity for a few weeks during annual reindeer migrations in August, whereas the migration-range is subjected to grazing for only a short period of time (referred to as light grazing intensity, LG). The set-up consists of eight blocks bisecting the fence (5 × 10 m large, spaced 20 m apart). On ...