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- Plant Ecology
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- Ecosystems 6
- Endangered ecosystems 6
- Environmental pollution 6
- Landscape Ecology 6
- Landscape ecology 6
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 6
- Applied Ecology 5
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- Life sciences 5
- Animal Ecology 4
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- Climate Change 4
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- Agriculture 3
- Biogeosciences 3
- Geoecology/Natural Processes 3
- Nature Conservation 3
- Plant ecology 3
- Aquatic biology 2
- Biotechnology 2
- Botany 2
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