natural riparian resources
DESCRIPTION
Natural Riparian Resources. Water. Vegetation. Landscape & Soil. Riparian/Wetland Vegetation Groups. Stabilizers Intermediate Colonizers Invaders. Stabilizer group. Establish along streams, rivers, lakes, ponds, springs, & seeps Strong, fibrous, deep root system Rhizomatous - PowerPoint PPT PresentationTRANSCRIPT
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Natural Riparian Resources
Landscape & Soil
Water
Vegetation
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Riparian/Wetland Vegetation Groups
StabilizersIntermediateColonizersInvaders
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Stabilizer group
Establish along streams, rivers, lakes, ponds, springs, & seepsStrong, fibrous, deep root systemRhizomatousProvide protection against water’s energy
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Root Length
0
5
10
15
20
25
Miles
NebraskaSedge
Baltic Rush DouglasSedge
NevadaBluegrass
Column of soil12"X12"X16"
0 to 4 in4 to 8 in8 to 12 in12 to 16 in
Manning, M.E., et al, 1989
0.00
0.20
0.40
0.60
0.80
1.00
Pounds
NebraskaSedge
BalticRush
DouglasSedge
NevadaBluegrass
Column of soil12"X12"X16"
0 to 4 in4 to 8 in8 to 12 in12 to 16 in
Root Mass(Weight)
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Sedges (Carex)
Leaves 3-ranked Stem TriangularSolid
“Sedges have edges”
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Typical HabitatSaturated Soils
Beaked Sedge(Carex utriculata)Formerly(Carex rostrata)
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Nebraska sedgeNebraska sedge((Carex nebrascensisCarex nebrascensis))Emery CreekEmery Creek
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Panicled bulrush (Scirpus microcarpus)
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Rushes (Juncus) “Rushes are Round”
Solid and Round or CompressedLeaves Alternate or2-Ranked
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Baltic Rush or Wire Grass(Juncus balticus)
Typical Growth Pattern
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Baltic Rush Baltic Rush RootsRoots
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True Grasses
Leaves 2-ranked
Stem HollowWith
Nodes and Internodes
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Fowl Manna Grass(Glyceria striata)
Blue Joint Reedgrass(Calamagrostis canadensis)
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Reeds Reeds CanarygrassCanarygrass((Phalaris arundinaceaPhalaris arundinacea))Little Wood RiverLittle Wood River
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Woody Species Woody Species (Willow, Alder, Birch, etc.)(Willow, Alder, Birch, etc.)
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WillowWillow
BirchBirch
WillowWillow
Willow Roots
Red Osier Dogwood
Alder
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Intermediate
Plants that are considered colonizers Establish on freshly deposited soil or
disturbed sitesHave intermediate root systemsCan result in proper functioning condition
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Spike Rush(Eleocharis pauciflora)
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Coyote (Sand Bar) Coyote (Sand Bar) Willow (Willow (Salix exiguaSalix exigua))Teton RiverTeton River
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Arroyo Willow(Salix lasiolepis)
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CottonwoodCottonwood((Populus sppPopulus spp.).)South Fork Snake South Fork Snake RiverRiver
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Cottonwood Roots Cottonwood Roots (“rebar”)(“rebar”)
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Colonizers
First to establish freshly deposited soil shallow open water barren areasRoot systems stoloniferous or rhizomatous shallow and relatively weak
Critical to recovery
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Brook GrassBrook Grass((Catabrosia aquatica)Catabrosia aquatica)
Water-cress(Rorippa nasturtium-aquaticum)
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Short-awned Foxtail(Alopecurus arundinaceus)
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Invaders
Replaces stabilizers species as a result of disturbance.Shallow, less massive root systemsLess protective of streambanks against water’s energyNoxious weeds
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Kentucky Bluegrass Kentucky Bluegrass (Poa prentensis) (Poa prentensis) East Fork Castle CreekEast Fork Castle Creek
RedtopRedtop
((Agrostis gigenteaAgrostis gigentea) ) Formerly Formerly AA.. stoloniferstolonifer and and albaalba
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Leafy SpurgeLeafy Spurge
Purple LoosestrifePurple Loosestrife
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Standard Checklist (lotic)Yes No N/A VEGETATION
6) There is diverse age-class distribution of riparian-wetland vegetation (recruitment for maintenance/recovery)
Rationale:
7) There is diverse composition of riparian-wetland vegetation (for maintenance/recovery)
Rationale: 8) Species present indicate maintenance of riparian-wetland
soil moisture characteristics Rationale: 9) Streambank vegetation is comprised of those plants or
plant communities that have root masses capable of withstanding high streamflow events
Rationale: 10) Riparian-wetland plants exhibit high vigor Rationale
11) Adequate vegetative cover present to protect banks and dissipate energy during high flows
Rationale:
12) Plant communities are an adequate source of coarse and/or large woody material (for maintenance/recovery)
Rationale:
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6) There is diverse age-class distribution of riparian-wetland vegetation (recruitment for
maintenance/recovery)Purpose: To determine if the number of age classes that provide recruitment to maintain an area or to allow an area to recover are present. Multiple age-classes usually indicate that riparian-wetland areas can recover or maintain themselves.
Need to determine if reach has potential for woody vegetation and if it is necessary for functionality
At least 2 age-classes should be present One of the age-class should be young Older age classes can persist in degraded conditions This is presence/absence issue, not an amount Closed canopy/late seral types may have limited age-
class diversity but still should have some
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Wolf Creek Colorado – absolutely requires willow to function
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Are there two or more age classes of stabilizer riparian/wetland species present within the riparian area?
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Are there two or more age classes of stabilizer riparian/wetland species present within the riparian area?
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Sufficient Herbaceous “Age-Class” Sufficient Herbaceous “Age-Class” Diversity – Nebraska sedgeDiversity – Nebraska sedge
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Sufficient willow & herbaceous age-class diversity – Yes
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“Yes” Sufficient willow age-class diversity – system “likely” needs willow & herbaceous veg to recover
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““No” Insufficient willow age-class diversity No” Insufficient willow age-class diversity (all mature) system needs willow to function(all mature) system needs willow to function
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“Yes” Sufficient age-class diversity – Narrowleaf Cottonwood (Populus
angustifolia)
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7) There is diverse composition of riparian-wetland vegetation (for maintenance/recovery)
Purpose: To determine if the existing species composition is sufficient for maintenance or recovery. Diverse composition of riparian-wetland vegetation (relative to the site’s potential), is necessary to provide stability to the site. Not all species a site is capable of producing need to
be present, but more than two are common and required in most cases
This is a presence/absence question not amount At least stabilizing species present (upland plants do
not count) Addresses entire riparian area (not just
streambanks)
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Are there at least two stabilizer riparian/wetland species present within the riparian area?
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Are there at least two stabilizer riparian/wetland species present within the riparian area?
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Are there at least two stabilizer riparian/wetland species present within the riparian area? There are two but dominated by one (CAAQ)
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Castle Cr Utah – functioning well with Castle Cr Utah – functioning well with herbaceous species (2 species of sedge)herbaceous species (2 species of sedge)
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“Yes” system needs to recover & has adequate R-W vegetation diversity to do it
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“No” Species composition is JUBA and POPR (with some other UPL grasses)
20032003
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Sand + Popr + Upland Grasses + JUBA patches = Vulnerability to rapid channel response
20052005
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Purpose: To determine if the water table level is being maintained or raised as indicated by the presence of riparian-wetland vegetation. Maintenance of an existing water table or restoration of a former one is vital to the functionality of the system. Flow regime will dictate the kind and extent of
riparian-wetland plants – need to understand site potential
Obligate & Facultative Wetland plants must dominate the reach in order for a yes answer to be given
8) Species present indicate maintenance of riparian soil moisture
characteristics
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Indicator CategoriesIn: National List of Plant Species that Occur in Wetlands (USFWS) website -- http://www.nwi.fws.gov/bha/list88.html
Obligate Wetland (OBL): Occur almost always in wetlands.Facultative Wetland (FACW): Usually occur in wetlands but occasionally in nonwetlands.Facultative (FAC): Equally likely to occur in wetlands or nonwetlands.
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Indicator Categories
Facultative Upland (FACU): Usually occur in nonwetlands.Obligate Upland (UPL): Occur in wetlands in another region, but occur almost always in nonwetlands.
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Coyote willow - (FACW)Coyote willow - (FACW)
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Nebraska sedge - (OBL) Nebraska sedge - (OBL) ““Yes”Yes”
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No, little or no OBL & FACW species present -- streambank is dominated by FAC & UPL plants
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“No” – Stream incised/incising – water table being abandoned – OBL and FACW species being replaced by facultative species
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Yes, species present indicate maintenance of riparian soil moisture characteristics at new elevation
Yellow willow
Scirpus
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9) Streambank vegetation is comprised of those plants or plant communities that have root masses capable of withstanding high
stream flow eventsPurpose: To determine if the right kinds of plants or plant communities (deep rooted) occur on the streambank. Deep rooted plants are necessary for long-term streambank stability.
Streambank is the part of the channel between the scour line and the first terrace (usually “bankfull” elevation)
Not a quantity question per se Presence or absence
Most obligate wetland or facultative wetland plants have root masses that stabilize streambanks
Focus is on the streambank – are the streambanks comprised of at least patches of recognizable plant groupings?
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Streambank
Base Flow
Bankfull
Streambank
Terrace Wall Valley Wall
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Winward, 2000
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Root Length
0
5
10
15
20
25
Miles
NebraskaSedge
Baltic Rush DouglasSedge
NevadaBluegrass
Column of soil12"X12"X16"
0 to 4 in4 to 8 in8 to 12 in12 to 16 in
Manning, M.E., et al, 1989
0.00
0.20
0.40
0.60
0.80
1.00
Pounds
NebraskaSedge
BalticRush
DouglasSedge
NevadaBluegrass
Column of soil12"X12"X16"
0 to 4 in4 to 8 in8 to 12 in12 to 16 in
Root Mass(Weight)
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Channel Stability Rating (Vegetation)
0 2 4 6 8 10Relative Stability Class
Bare Ground
Willow-Sedge
Willow-Bluegrass
Beaked Sedge
Bluegrass
Baltic Rush
Anchored Rock
Coyote Willow
Winward 2000Appendix B
Adequate Root Strength
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No, streambank is comprised of shallow rooted FAC & UPL species
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Yes, streambank is comprised of stabilizers (Beaked sedge & Nebraska sedge)
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No, although streambank is dominated by an obligate species (spikerush) but it is not a deep rooted stabilizer
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Streambank comprised of stabilizers? Streambank comprised of stabilizers? YesYes
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10) Riparian-wetland plants exhibit high vigor
Purpose: To determine if riparian-wetland plants are healthy and robust. Item is important but difficult to answer Look for obvious indicators of plant vigor
(plant growth form, leaf color, plant size, etc.)
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Plant Vigor-Leaves and RootsCaring for the Green Zone, Riparian Areas and Grazing ManagementAlberta Riparian Habitat Management Project, “Cows and Fish Project”
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Are the herbaceous stabilizer (late seral) species obvious individual plants? Are there new stabilizing herbaceous plants around the perimeter of the mat?
Low vigor of Nebraska Sedge
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Yes, obviously high vigor (herbaceous & woody)
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Low Plant Vigor (Arizona willow)Low Plant Vigor (Arizona willow)
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11) Adequate riparian-wetland vegetative cover present to protect banks and dissipate energy during high flows
Purpose: To determine if there is an adequate amount of riparian-wetland vegetation cover. It is crucial for the banks to have enough R-W vegetation to be able to function properly. This item deals with amount while items 6-
10 deal with other aspects of vegetation
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<0.5%
CB, BD
NonconsolidatedSl, C, S
GR, CB(or)
Consol.Sl, C, S
GroupI
(98+ %)
GroupIII
(90+ %)
GroupII
(90+ %)
GroupVII
(Uncommon)
(80+ %)
GroupVIII
(85+ %)
GroupV
(85+ %)
GroupIX
(95+ %)
GroupIV
(85+ %)
GroupVI
(80+ %)
GroupX
(98+ %)
GR, CB(or)
Consol.Sl, C, S
GR, CB(or)
Consol.Sl, C, S
CB(or)
Consol.Sl, C, S
NonconsolidatedSl, C, S
NonconsolidatedSl, C, S
NonconsolidatedSl, C, S
BD, Bedrock
Percent Stream Gradient
<2.0%
0.5-2.0%
2.0-4.0% >4.0%
4.0-10.0% 0.5-2.0%
Key to Greenline Riparian Capability Groups (Winword 2000)Percent gradient and substrate classes modified from Rosgen (1996).
Abbreviations Used:
Sl ......................Silt ...............................<0.02 mmC ......................Clay .............................0.02-0.05 mmS ......................Sand ...........................0.05-2.0 mmGR ...................Gravel .........................0.2-76 mm ....................08-3 inCB ...................Cobble .......................76-250 mm ..................3-9.8 inBD ...................Boulder ......................>250 mm ......................>9.8 inConsol. ...........Consolidated MaterialNon-Consol. ..Non-Consolidated Material
(Co Consolidated material refers to situations where at least one major soil horizon with within the root rooting zone consists of strongly compacted, cohesive, or Ce cemented particles.
Values in parentheses refer to percent of the greenline that should be represented by late seral community types or anchored rocks/logs when riparian areas fitting each capability group are functioning properly.
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-47. 2000
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No, inadequate amount of riparian-wetland vegetation cover
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No, inadequate amount of riparian-wetland vegetation cover
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Adequate amount of riparian-wetland Adequate amount of riparian-wetland vegetation cover “No”vegetation cover “No”
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Yes, adequate amount of riparian-wetland vegetation cover
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Adequate amount of R-W veg cover ? No – Adequate amount of R-W veg cover ? No – right bank is dominated by kentucky right bank is dominated by kentucky bluegrassbluegrass
Presence of riparian-wetland species Presence of riparian-wetland species (item 8)? Yes (CANE)(item 8)? Yes (CANE)
Streambanks comprised of stabilizing Streambanks comprised of stabilizing plants (item 9)? Yesplants (item 9)? Yes
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12) Plant communities are an adequate source of coarse and/or large woody material (for maintenance/recovery)
Purpose: To determine if streamside trees are present in adequate amounts to be incorporated into the channel to aid in energy dissipation. First must determine if large wood is
necessary for functionality (many systems in the intermountain west do not require large wood for functionality)
Sufficiently large to act as a hydrologic modifier
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Coarse/large wood is present and assisting in stream function but is it necessary for physical function?
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Coarse/large wood is present and assisting in stream function but is it necessary for physical function?Hanna Creek, Black Hills
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Natural Riparian Resources
VegetationLandscape/Soil
Water