| Similarity | Rank | |
|---|---|---|
| ecological | 0.864 | 9588 |
| ecosystems | 0.800 | 13909 |
| biodiversity | 0.799 | 13376 |
| hydrology | 0.783 | 60846 |
| biology | 0.775 | 7564 |
| conservation | 0.767 | 4776 |
| biota | 0.763 | 95999 |
| anthropology | 0.756 | 21771 |
| habitats | 0.755 | 13856 |
| ecologist | 0.748 | 60532 |
| estuarine | 0.748 | 74970 |
| zoology | 0.747 | 63775 |
| invertebrate | 0.744 | 67675 |
| fauna | 0.742 | 18077 |
| habitat | 0.741 | 7100 |
| Ecology | 0.740 | 24177 |
| entomology | 0.739 | 81772 |
| aquatic | 0.737 | 14757 |
| oceanography | 0.735 | 81910 |
| botany | 0.734 | 51709 |
| environmental | 0.732 | 1795 |
| geology | 0.724 | 21432 |
| biosphere | 0.722 | 44340 |
| paleontology | 0.717 | 82521 |
| biotic | 0.717 | 65589 |