- Plant Sciences 13
- Ecology 11
- Freshwater & Marine Ecology 10
- Plant Physiology 10
- Oceanography 7
- Marine & Freshwater Sciences 6
- Plant Breeding/Biotechnology 4
- Plant Ecology 4
- Plant Genetics and Genomics 4
- Plant Systematics/Taxonomy/Biogeography 4
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 4
- Animal Ecology 1
- Applied Ecology 1
- Atmospheric Protection/Air Quality Control/Air Pollution 1
- Climatology 1
- Ecotoxicology 1
- Engineering Fluid Dynamics 1
- Environmental Chemistry 1
- Environmental Management 1
- Fish & Wildlife Biology & Management 1