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Wetland Classification and Mapping of the Kenai Lowland, Alaska
Map Unit Descriptions Ecosystem: Relict Glacial Lakebed Map Unit: LB45; LB54
Extent: LB45: 6 wetland polygons; 65.0 ha; 0.05% of wetland area; 0.04% of wetland polygons. LB54: 3 wetland polygons; 11.0 ha; 0.01% of wetland area; 0.02% of wetland polygons. |
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An LB45 unit near Kasilof (polygon 9194). |
Wetland Indicators Type: Peat or Mineral Average depth to water table: LB4: 19.5 cm; n=50 LB5: 57.0 cm; n=2 Organic layer thickness: LB4: 116.0 cm; n=52 LB5: 78.5 cm; n=2 Average depth to redoximorphic features: LB4: 79.0 cm; n=3 LB5: n/a Common Soils: LB4: STARICHKOF, DOROSHIN, SALAMATOF, NIKOLAI Common Plant communities: LB4 component: Sweetgale - Shrubby cinquefoil Sphagnum moss - Ericaceous shrub Bog blueberry – Dwarf birch – Tufted hairgrass
LB5 component: |
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Accuracy assessment: 1 polygon interpreted as LB45 on
aerial photographs was field checked. It was revised to
LB24. None of the polygons interpreted as LB54 on aerial photographs were field checked. |
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These are small, rare complexes, with scanty information. They occur on the Relict Glacial Lakebed Ecosystem as a mixture of the shrubby component (LB4), which is common, and the infrequent bluejoint grass (Calamagrostis canadensis) dominated lakebed component (LB5). Where bluejoint is more abundant the unit is named LB54, and where the shrubby component predominates it is named LB45. Bluejoint grass is often found in areas that have been disturbed, or where the groundwater has been in recent contact with mineral soil. One of the mapped units is disturbed, near a created pond along Kalifonsky Beach Road, while at least four others are at the edges of peatland complexes, near a mineral soil groundwater source.
