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Ecology
FOS Biological sciences
Climatic changes
3
Botany
2
Environmental sciences
2
Birds--Breeding
1
Carbon cycle Biogeochemistry
1
Ecosystem health
1
Paleoecology
1
Plant diversity
1
Plant phenology
1
Remote sensing
1
Songbirds--Habitat
1
Songbirds--Migration
1
Tundra ecology
1
Vegetation and climate
1
Vegetation surveys--Remote sensing
1
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