7. Toposequences illustrating geomorphology, vegetation, elevations,
soil stratigraphy, and permafrost occurrence .......................................................
14
8. Ground views of alpine, upland, gravelly lowland, and lacustrine
ecotypes on Fort Greely .......................................................................................
27
9. Ground views of lowland and riverine ecotypes on Fort Greely .........................
28
10. Ecotypes on Fort Greely ......................................................................................
29
11. Environmental properties for ecotypes on Fort Greely .......................................
36
12. Fire occurrences on Fort Greely, 19501999 ......................................................
41
13. Active layer depths and permafrost occurrence at ground-reference
plots on Fort Greely .............................................................................................
43
14. Ecosections based on geomorphic units for Fort Greely .....................................
45
15. Depth to gravel at ground-reference plots on Fort Greely ..................................
51
16. Depth of organics at ground-reference plots on Fort Greely ...............................
52
17. Geology of Fort Greely .......................................................................................
53
18. Aerial views of ecosubdistricts within Fort Greely .............................................
55
19. Ecodistricts and ecosubdistricts for Fort Greely .................................................
56
20. Shaded-relief map of Fort Greely ........................................................................
57
21. Generalized profile of ecological characteristics of glaciated terrain within
Delta Lowlands ecodistrict on Fort Greely .........................................................
58
22. Generalized profile of ecological characteristics of floodplains and flats
within the Delta Lowlands ecodistrict on Fort Greely ........................................
59
TABLES
Table
1. Coding system for the ecological land classification for Fort Greely .................
8
2. Comparison of systems for differentiating ecosystems at various scales ............
9
3. Hierarchical associations among ecosystem components for ecotypes
found within Fort Greely .....................................................................................
19
4. Classification and description of ecotypes within Fort Greely ...........................
23
5. Areal extents of ecotypes found within Fort Greely ............................................
30
6. Mean cover (%) of the most abundant species within ecotypes on
Fort Greely ...........................................................................................................
31
7. Classification and description of geomorphic units used for differentiating
ecosections within Fort Greely ............................................................................
46
8. Areal extents of geomorphic units used for differentiating ecosections
found within Fort Greely .....................................................................................
50
9. Hierarchical grouping of ecodistricts and ecosubdistricts, and their areas,
within Fort Greely ...............................................................................................
54
iv
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