Physics & Astronomy
productivity
100%
extinction
71%
recovery
68%
gradients
32%
carbon cycle
30%
anoxia
29%
isotope ratios
23%
limestone
23%
deep water
22%
nutrients
22%
strata
21%
water
19%
China
18%
oceans
18%
animals
16%
stabilization
14%
intervals
12%
pumps
11%
causes
10%
simulation
6%
Earth & Environmental Sciences
mass extinction
97%
Permian
73%
productivity
58%
Triassic
57%
water column
27%
biological pump
24%
paleoproductivity
23%
isotopic analysis
20%
anoxia
19%
chemical structure
19%
carbon cycle
16%
stabilization
14%
deep water
13%
limestone
12%
animal
11%
nutrient
10%
ecosystem
9%
ocean
9%
simulation
7%
Chemical Compounds
Carbon Cycle
64%
Column Like Crystal
50%
Ecosystem
50%
Nutrient
45%
Pump
40%
Simulation
26%
Time
15%