Earth & Environmental Sciences
forest ecosystem
80%
North America
65%
hysteresis
51%
nitrogen
50%
soil biodiversity
24%
research of the effects
22%
soil acidification
21%
deciduous forest
18%
atmospheric deposition
17%
water chemistry
17%
terrestrial ecosystem
16%
acidity
16%
aquatic ecosystem
16%
soil organic matter
15%
new species
14%
environmental change
14%
microbial community
14%
experimental study
13%
disturbance
11%
surface water
11%
vegetation
10%
ecosystem
9%
climate change
9%
carbon
9%
history
9%
air
9%
effect
3%
Medicine & Life Sciences
Forests
99%
Ecosystem
92%
North America
89%
Nitrogen
82%
Soil
54%
Climate Change
23%
Biodiversity
23%
Microbiota
16%
Carbon
16%
Air
13%
History
12%
Water
11%
Engineering & Materials Science
Ecosystems
89%
Nitrogen
77%
Hysteresis
39%
Soils
32%
Aquatic ecosystems
23%
Acidification
20%
Biodiversity
20%
Acidity
19%
Surface waters
19%
Recovery
18%
Biological materials
18%
Climate change
15%
Wood
12%
Carbon
10%
Air
7%
Chemical Compounds
Ecosystem
100%
Hysteresis
61%
Nitrogen
50%
Soil Acidification
43%
Soil Organic Matter
30%
Surface Water
22%
Reduction
19%
Soil
17%
Time
15%
Chemistry
12%
Carbon Atom
9%