Appendix v. Key to riparian vegetation types

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141 Appendix v. Key to riparian vegetation types

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KEY TO RIPARIAN VEGETATION TYPES la. Tree overstory cover~ 25%. 2.

2a. The tree canopy contains mainly conifers, or about equal amounts of conifers and deciduous trees.

142 Group A: Coniferous tree types 2b. The tree canopy contains mainly deciduous trees; conifers

are minor or absent.

Group B: Deciduous·tree types lb. Tree overstory cover< 25% ••....•.•...••...••.•.•.••.••• 3

3a. Tall shrubs (> 1.5m tall; Salix geyeriana, s. boothii, ~.

lasiandra, Alnus incana) contribute ~ 25% cover.

Group c: Tall shrub types

3b. Tall shrubs contribute< 25% cover •..••...••.•.••.•••.•• 4 4a. Medium shrubs (< 1.5m tall; Salix wolfii, Artemisia cana)

or tree seedlings or saplings contribute ~ 25% cover.

Group D: Medium shrub types _ 4b. Medium.shrubs or tree seedlings or saplings contribute

<25% cover.

Group E: Herbaceous types Group A: coniferous tree types

la. Picea engelmannii contributes at least 25% of' the tree

canopy, which may consist mainly of Abies lasiocarpa or Pinus contorta. Picea pungens is absent or contributes little

cover (Picea engelmannii series).

Only one type has been identified so far:

Picea engelmannii/Galium triflorum community lb. Picea pungens contributes ~ 50% of the tree canopy, which may

consist mainly of Pinus contorta.

Picea pungens series Group B: Deciduous tree types

Only one series has been identified so far:

Populus angustifolia contributes ~ 50% of the tree canopy.

Populus angustifolia series Group c: Tall shrub types

la. Willows (genus Salix) contribute most of the canopy

cover . . . 2

2a. Salix geyeriana or Salix lasiandra, alone or in

combination, contribute ~ 50% of the canopy cover (Salix geyeriana series) . . . ; . . . 3

3a. Carex rostrata contributes > 20% cover to: the understory.

§.. geyeriana/Carex rostr'ata community 3b. Carex rostrata contributes < 20% cover to

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the

understory . . .

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4a. Pea pratensis dominates or codominates the understory.

~. geyeriana/Poa pratensis community 4b. Pea pratensis contributes little cover.

Other Q• geyeriana stands

143 2b. Salix boothii contributes ~50% of the canopy cover; Salix geyeriana and Salix lasiandra are absent·or clearly

contribute less cover than Q• boothii. (Salix boothii series) . . . ·- . . . 5

Sa. Pea pratensis dominates or codominates the understory.

~. boothii/Poa pratensis community 5b. Pea pratensis is a minor species. ·

Other Q• boothii.stands lb. Tall shrubs other than willows contribute most of the canopy

cover; Alnus incana contributes ~ 50% of the canopy cover (Alnus incana series) .••...•.•..•••..•...••••.••.••...•..• 6 6a. Glyceria striata, Pea pratensis, Phleum pratense, or

other graminoids of mesic sites dominate the understory.

A· incana/Mesic Graminoid community 6b. Graminoids of mesic sites are minor components of the

understory.

Other Alnus incana stands

Group D: Medium shrub types

la. Tree seedlings or saplings dominate or codominate the medium shrub layer.

Only one type has been identified so far:

Populus anqustifolia/Recent Alluvial Bar community lb. Medium-height shrubs dominate the medium shrub layer; tree

seedlings and saplings are absent or minor components ••••. 2 2a. Artemisia cana contributes ~ 50% of the shrub canopy

(Artemisia cana series).

Only one community has been identified so far:

Pea pratensis dominates or codominates the understory.

A· cana/Poa pratensis community 2b. Artemisia cana contributes < 50% of the shrub canopy; other

shrub species form the canopy.

Only one type has been identified so far:

Salix wolfii contributes ~ 50% of the canopy cover (Salix wolfii series); Deschampsia caespitosa contributes~ 5% of the understory cover.

Salix wolfii/Deschampsia caespitosa community

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144 Group E: Herbaceous types i

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la. Graminoids (grasses, sedges, and rushes) contribute most of the cover; forbs are minor •••••••••••••••.•••••••••• _ •• -• ••• -2 2a. Sedges (genus Carex) contribute> SO% of the cover •••••• 3

3a. carex microptera contributes > 25% cover. ·

carex microptera community 3b. Carex microptera contributes< 25% cover.~ .••••••••••• 4

Appendix v. Key to riparian vegetation types

141

Appendix v. Key to riparian vegetation types

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KEY TO RIPARIAN VEGETATION TYPES la. Tree overstory cover~ 25%. 2.

2a. The tree canopy contains mainly conifers, or about equal amounts of conifers and deciduous trees.

142

Group A: Coniferous tree types 2b. The tree canopy contains mainly deciduous trees; conifers

are minor or absent.

Group B: Deciduous·tree types lb. Tree overstory cover< 25% ••....•.•...••...••.•.•.••.••• 3

3a. Tall shrubs (> 1.5m tall; Salix geyeriana, s. boothii, ~.

lasiandra, Alnus incana) contribute ~ 25% cover.

Group c: Tall shrub types

3b. Tall shrubs contribute< 25% cover •..••...••.•.••.•••.•• 4 4a. Medium shrubs (< 1.5m tall; Salix wolfii, Artemisia cana)

or tree seedlings or saplings contribute ~ 25% cover.

Group D: Medium shrub types _ 4b. Medium.shrubs or tree seedlings or saplings contribute

<25% cover.

Group E: Herbaceous types Group A: coniferous tree types

la. Picea engelmannii contributes at least 25% of' the tree

canopy, which may consist mainly of Abies lasiocarpa or Pinus contorta. Picea pungens is absent or contributes little

cover (Picea engelmannii series).

Only one type has been identified so far:

Picea engelmannii/Galium triflorum community lb. Picea pungens contributes ~ 50% of the tree canopy, which may

consist mainly of Pinus contorta.

Picea pungens series Group B: Deciduous tree types

Only one series has been identified so far:

Populus angustifolia contributes ~ 50% of the tree canopy.

Populus angustifolia series Group c: Tall shrub types

la. Willows (genus Salix) contribute most of the canopy

cover . . . 2

2a. Salix geyeriana or Salix lasiandra, alone or in

combination, contribute ~ 50% of the canopy cover (Salix geyeriana series) . . . ; . . . 3

3a. Carex rostrata contributes > 20% cover to: the understory.

§.. geyeriana/Carex rostr'ata community 3b. Carex rostrata contributes < 20% cover to

the

understory . . .

4

4a. Pea pratensis dominates or codominates the understory.

~. geyeriana/Poa pratensis community 4b. Pea pratensis contributes little cover.

Other Q• geyeriana stands

143

2b. Salix boothii contributes ~50% of the canopy cover; Salix geyeriana and Salix lasiandra are absent·or clearly

contribute less cover than Q• boothii. (Salix boothii series) . . . ·- . . . 5

Sa. Pea pratensis dominates or codominates the understory.

~. boothii/Poa pratensis community 5b. Pea pratensis is a minor species. ·

Other Q• boothii.stands lb. Tall shrubs other than willows contribute most of the canopy

cover; Alnus incana contributes ~ 50% of the canopy cover (Alnus incana series) .••...•.•..•••..•...••••.••.••...•..• 6 6a. Glyceria striata, Pea pratensis, Phleum pratense, or

other graminoids of mesic sites dominate the understory.

A· incana/Mesic Graminoid community 6b. Graminoids of mesic sites are minor components of the

understory.

Other Alnus incana stands

Group D: Medium shrub types

la. Tree seedlings or saplings dominate or codominate the medium shrub layer.

Only one type has been identified so far:

Populus anqustifolia/Recent Alluvial Bar community lb. Medium-height shrubs dominate the medium shrub layer; tree

seedlings and saplings are absent or minor components ••••. 2 2a. Artemisia cana contributes ~ 50% of the shrub canopy

(Artemisia cana series).

Only one community has been identified so far:

Pea pratensis dominates or codominates the understory.

A· cana/Poa pratensis community 2b. Artemisia cana contributes < 50% of the shrub canopy; other

shrub species form the canopy.

Only one type has been identified so far:

Salix wolfii contributes ~ 50% of the canopy cover (Salix wolfii series); Deschampsia caespitosa contributes~ 5% of the understory cover.

Salix wolfii/Deschampsia caespitosa community

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144

Group E: Herbaceous types i

la. Graminoids (grasses, sedges, and rushes) contribute most of the cover; forbs are minor •••••••••••••••.•••••••••• _ •• -• ••• -2 2a. Sedges (genus Carex) contribute> SO% of the cover •••••• 3

3a. carex microptera contributes > 25% cover. ·

carex microptera community 3b. Carex microptera contributes< 25% cover.~ .••••••••••• 4

4a.Carex rastrata contributes ~ 25% cover.

carex rostrata community 4b. Carex rostrata contributes < 25% cover.

Only one type has been identified so far:

Carex aquatilis contributes ~ 25% cover. .

Carex aquatilis community 2b. Sedges contribute < SO% of the cover

Only one type has been identifiedso far:

Juncus balticus contributes ~ 25% cover.