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Alaska
16
disturbance
nitrogen
populations
16
tundra
16
biomass
15
inorganic nutrients
15
organic matter
15
primary production
15
phosphorus
14
productivity
12
annual variation
4
calcium
4
carbon
4
magnesium
4
potassium
4
exclosure
3
heath
2
nutrients
2
plant phenology
1
producitivity
1
wet sedge
1
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