Across
- 1. Ice river sculpting valleys over millennia
- 3. Darwin’s Origin might find a shelf here
- 4. Frozen treeless biome with permafrost soils
- 6. Lacking subtlety, blunt as human impact
- 7. Whole, unfragmented by borders or layers
- 10. No longer extant, recorded in scientific logs
- 12. Earth’s vent, exemplified by Mount Nyiragongo
- 14. Brackish junction where freshwater greets the sea
- 17. Prop-rooted tree anchoring tidal zones
- 18. Invertebrate negotiating the soil matrix
- 21. Wildflower-dotted grassland buzzing with pollinators
- 22. Fish synchronizing movement for survival
- 24. Boundary beyond which observation ceases. _____ horizon
- 26. Grassland with scattered woody sentinels
- 27. Rainforest flora forming protective canopies
Down
- 2. Fungus and alga united in symbiosis
- 5. Constantly in motion, like metabolic pathways
- 8. Uppermost layer hosting epiphytes and arboreal fauna
- 9. Pauses in ecological succession or volcanic output
- 11. Observer of species interactions and ecosystems
- 13. Claim lacking empirical support
- 15. Wetland stem that surges with water flow
- 16. Accumulated insight encoded in books and genes
- 19. Interpreter of stratified Earth’s history
- 20. Microscopic cargo for angiosperm fertilization
- 23. Colonial cnidarian secreting reef architecture
- 25. Coastal protrusion reshaping ocean currents