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[ID: 113] Nitrogen and water uptake patterns in mature spruce, pine and their mixed stands at Främlingshem

PI: Reimo Lutter

The aim of the project is to describe mature spruce, pine and their mixed stands nitrogen and water uptake patterns. Novel stable-isotope tracing techniques of 15N compounds and 2H2-labeled water in pulse-chase are used to describe trees spatial below-ground root functioning and site occupancy. The project is carried out in Främlingshem trial. The experiment started in 2019 June where blocks 1, 2, 3, 4 and 6 were labelled with 15N and deuterium. The project will give new insights about the fundamental processes of spatial root functioning (nitrogen and water uptake) and rooting area of the two most important boreal tree species (Scots pine and Norway spruce).

15nbelow-ground competitiondeuteriumroot functioningrooting areastable isotopes

[ID: 49] Partitioning Evapotranspiration across multiple spatial and temporal scales

PI: Hjalmar Laudon

We are using recent advances in stable isotope techniques to partition ET into evaporation and transpiration across multiple spatial and temporal scales in a boreal forest watershed. This new approach will allow for novel, mechanistic assessments of the interactions and feedbacks between vegetation and the terrestrial hydrologic cycle as well as evaluate how these interactions and feedbacks may respond to a changing climate.

hydrologic cyclestable isotopestranspiration

[ID: 48] Rain Interception

PI: Nataliia Kozii

Estimating water losses via canopy interception

rain interceptionstable isotopesthroughfall