- Ecology 9
- Biodiversity 4
- Climate Change/Climate Change Impacts 4
- Conservation Biology/Ecology 4
- Atmospheric Sciences 2
- Biological and Physical Anthropology 2
- Environment, general 2
- Environmental Engineering/Biotechnology 2
- Environmental Management 2
- Evolutionary Biology 2
- Life Sciences, general 2
- Paleontology 2
- Physical Geography 2
- Zoology 2
- Agriculture 1
- Plant Physiology 1
- Plant Sciences 1
- Soil Science & Conservation 1