Earth & Environmental Sciences
food web
67%
ecosystem
42%
resource
40%
trophic level
18%
benthic ecosystem
12%
pelagic ecosystem
12%
riparian zone
10%
lake ecosystem
10%
forest ecosystem
8%
primary production
8%
preserve
7%
predator
7%
desert
7%
organic matter
6%
lake
5%
river
4%
energy
4%
test
3%
Agriculture & Biology
food webs
80%
ecosystems
54%
trophic levels
16%
benthic ecosystems
12%
lakes
11%
research management
10%
research planning
10%
riparian areas
8%
primary productivity
8%
energy transfer
8%
forest ecosystems
8%
deserts
6%
preserves
6%
organic matter
6%
case studies
6%
rivers
5%
predators
5%
testing
2%
Medicine & Life Sciences
Food Chain
100%
Ecosystem
80%
Lakes
16%
Rivers
8%
Forests
7%
Research Design
5%
Pressure
4%