- Microbiology 6
- Microbial Ecology 3
- Ecology 2
- Freshwater & Marine Ecology 2
- Geoecology/Natural Processes 2
- Nature Conservation 2
- Water Quality/Water Pollution 2
- Zoology 2
- Biotechnology 1
- Ecotoxicology 1
- Engineering, general 1
- Marine & Freshwater Sciences 1
- Microbial Genetics and Genomics 1
- Oceanography 1