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Picea glauca
54
Growth limitation hypothesis
52
boreal forest
52
permafrost
52
tundra-taiga ecotone
52
Picea Picea glauca
46
Arctic
15
treeline
15
white spruce
15
Alaska
14
boreal forest advance
14
foliar nutrients
14
forest tundra ecotone
14
snow
14
invasion
13
glauca
7
13C
1
15N
1
ALPINE TUNDRA
1
ARCTIC TUNDRA
1
BOREAL FOREST/TIAGA
1
Brooks Range
1
Picea mariana
1
adult growth rate
1
air temperature
1
basal area
1
boreal
1
cone counts
1
foliar N
1
foliar P
1
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