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Arctic
2
Picea glauca
2
treeline
2
white spruce
2
13C
1
15N
1
ALPINE TUNDRA
1
ARCTIC TUNDRA
1
Alaska
1
BOREAL FOREST/TIAGA
1
Brooks Range
1
Picea mariana
1
adult growth rate
1
air temperature
1
basal area
1
boreal
1
boreal forest advance
1
cone counts
1
foliar N
1
foliar P
1
foliar nutrients
1
forest tundra ecotone
1
glauca
1
mariana
1
sea ice retreat
1
seedling growth rate
1
seedling to sapling recruitment
1
snow
1
soil moisture
1
soil temperature
1
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