Detailed Soil Survey of the Mount Revelstoke Summit Area.
Detailed Soil Survey of the Mount Revelstoke Summit Area. Detailed Soil Survey of the Mount Revelstoke Summit Area.
TABLE A. CLASSES OF FRAGILITY FOR PLANT COMMUNITIES, MOUNT REVELSTOKE SUMMIT AREA .Class Definition and Attributes of Class Plant Communities*0 Little susceptibility to damage . This class includes unvegetated or scattered vegetationsparsely-vegetated areas on bedrock exposures and talus slopes . on rock outcrops ortalus1 Slight susceptibility to damage . Under 25 percent loss of vegetation Carex nigricanscover is expected with moderate trampling pressure . There should be basin communitya high recovery of vegetation with little species change from seasonto season, slowly deteriorating with constant use . Most areas areunsuitable for use because of spring flooding .2 Low susceptibility to damage . A vegetation loss of under 25 percent Rhododendronis expected with moderate trampling pressure . However, vegetation albiflorum , Alnusrecovery from season to season will be slight with rapid deterioration sinuata, Salixunder constant use . There is a probability of a change in species monticolacomposition . The nature of the vegetation discourages randomtrampling .3 Moderate susceptibility to damage . Between 25 and 50 percent of Luetkea pectinata,vegetation cover will likely be lost with moderate trampling Carex nigricanspressure . Good vegetation recovery from season to season is north slopeexpected with slow deterioration upon constant use . Only a slight community,change in species composition is likely . Some areas are very un- Carex nigricanssuitable for use because of poor drainage conditions .seepage community4 Moderately high susceptibility to damage . A 50 to 70 percent loss Cassiopeof vegetation cover is expected with moderate trampling pressure ._mertensianaThere will be virtually no recovery of dominant vegetation fromseason to season and a great change in species composition is likely .5 High susceptibility to damage . A 70 to 90 percent loss of vegetation Valeriana sitchenais ,cover is expected with moderate trampling pressure and even lowLuzula glabratatrampling intensities will probably cause a great vegetation loss .Chances of vegetation recovery from one season's use are good but willprobably deteriorate rapidly with continued use . A great change inspecies composition is likely .6 Great susceptibility to damage . From 70 to 90 percent of vegetation Vacciniumcover will likely be lost with moderate trampling pressure . Little membranaceumrecovery of the dominant vegetation can be expected from season toseason and there is the possibility of a great change in speciescomposition .7 Extreme susceptibility to damage . Greater than 90 percent of the Eriophorumvegetation cover will probably be lost with moderate trampling and polystachionregeneration will be slow because of the production of quagmireconditions .*Refer to Ecological Assessment of the Summit Area, Mount Revelstoke National Park(Landals and Scotter, 1974) for descriptions of plant communities .
Other communities were assimilated into this order byobservation oftheir performance when subjected to visitor tramplingor by guidance from other research, principally Nagy and Scottery 1974 .Table A presents the final definition and description of theclasses of plant community fragility and ordering of plant communities .It must be realized that the rating of plant communities isonly relative and it does not imply a regular gradation in fragilityto trampling . There is, for example, a large gap between thedurability of vegetation in-classes 3 and 4 .On the environmentalfragility overlay map some units unmappable due to scale have beenabsorbed into the surrounding units .For example, within theboundaries of vegetation fragility class 6(Vaccinium membranaceum),there are many scattered areas of Rhododendron albiflorum which has afragility rating of 2 .Soil Fragility RatingSoil fragility has been rated according to water erosionpotential and susceptibility to disturbance by trampling .The tramplingsusceptibility isa fragility parameter that may not be recognized in arating that only evaluates erosion potential .Soils on gently slopingland surfaces or in depressional areas have low erosion potential, butthey may have low bearing strength due to wetness and fine textures ororganic layers .These soils are easily churned up by trampling thusplant rooting systems are destroyed and quagmire conditions result .Soil susceptibility to erosion refers tothe expected rate andamount of soil loss by water -- and to a lesser degree wind -- transport
- Page 18 and 19: 116 . Pyrophosphate-Extractable Alu
- Page 20 and 21: 13FIGURE 2 .DIAGRAM OF A SOIL PROFI
- Page 22 and 23: 15Soils of the Summit AreaThe soils
- Page 24 and 25: MISCELLANEOUS MAPPING UNITSRBedrock
- Page 26 and 27: AhBhf20 cm-Plate l .The Humo-Ferric
- Page 28 and 29: 21extremely sloping land surfaces o
- Page 30 and 31: Soil Map Unit 3(Orthic and Cumulic
- Page 32 and 33: 25These soils have severe limitatio
- Page 34 and 35: 27Horizon Depth (cm) Color Texture
- Page 36 and 37: 295-a20 cm-5 -bPlate 5 .The hummock
- Page 38 and 39: 31stands are made up of Abies lasio
- Page 40 and 41: 6-aAeBfR20 cm-6 -bPlate 6 .The Lith
- Page 42 and 43: 37INTERPRETATIONSSoil Properties an
- Page 44 and 45: 39TABLE 4,GUIDES FOR ASSESSING SOIL
- Page 46 and 47: 41TABLE 6 .GUIDES FOR ASSESSING SOI
- Page 48 and 49: 43TABLE 8 .GUIDES FOR ASSESSING SOI
- Page 50 and 51: 45especially where bedrock is close
- Page 52 and 53: TABLE 10 . DEGREE AND NATURE OF SOI
- Page 54 and 55: 49The soils of map units 1, 8 and 9
- Page 56 and 57: 51compounds thus inhibiting percola
- Page 58 and 59: 53PRODUCTIVITYProductivity ratings
- Page 60 and 61: S4 XTABLE 11 . DISTRIBUTION OF SOIL
- Page 62 and 63: 57BIBLIOGRAPHYAlberta Department of
- Page 64 and 65: 59Terzaghi, K . and R .B . Peck . 1
- Page 66 and 67: 61ecosystem .While the activities i
- Page 70 and 71: TABLE B. CLASSES OF FRAGILITY FOR S
- Page 72 and 73: 67than to channel use to a rarer ty
- Page 74 and 75: 69approximately 10 cm thickness and
- Page 76 and 77: 71ANALYTICAL DATA 1HorizonDepthcmCa
- Page 78 and 79: 73several species of common occurre
- Page 80 and 81: 75Soil Map Unit 3The imperfectly to
- Page 82 and 83: 77Soil Classification :Orthic Regos
- Page 84 and 85: 79ANALYTICAL DATA 3BHorizonDepthcmC
- Page 86 and 87: 81Elevation : 6,000 ft . ASL (1,830
- Page 88 and 89: 82ANALYTICAL DATA 4HorizonDepthcmCa
- Page 90 and 91: Aspect :southeastElevation : 6,200
- Page 92 and 93: Soil Map Unit 6Hummocky microrelief
- Page 94 and 95: ANALYTICAL DATA 6HorizonDepthcmCaC1
- Page 96 and 97: Location : S-7Parent Material :glac
- Page 98 and 99: Soil Map Unit 8These soils have med
- Page 100 and 101: Elevation : 6,250 ft . ASL (1,910 m
- Page 102 and 103: orizonPyrophosphate96ANALYTICAL DAT
- Page 104 and 105: Slope : 5%Aspect :northElevation :
- Page 106 and 107: Soil Map Unit 10Map Unit 10 soils h
- Page 108 and 109: Vegetation : Abies lasiocarpa (shru
- Page 110 and 111: 104ANALYTTCAL DATAlOBHorizonDepthcm
- Page 112 and 113: A further separation of sands is ma
- Page 114 and 115: (D1) Rapidly drained - soil moistur
- Page 116 and 117: 110TABLE 13 . UNIFIED SOIL CLASSIFI
TABLE A. CLASSES OF FRAGILITY FOR PLANT COMMUNITIES, MOUNT REVELSTOKE SUMMIT AREA .Class Definition and Attributes <strong>of</strong> Class Plant Communities*0 Little susceptibility to damage . This class includes unvegetated or scattered vegetationsparsely-vegetated areas on bedrock exposures and talus slopes . on rock outcrops ortalus1 Slight susceptibility to damage . Under 25 percent loss <strong>of</strong> vegetation Carex nigricanscover is expected with moderate trampling pressure . There should be basin communitya high recovery <strong>of</strong> vegetation with little species change from seasonto season, slowly deteriorating with constant use . Most areas areunsuitable for use because <strong>of</strong> spring flooding .2 Low susceptibility to damage . A vegetation loss <strong>of</strong> under 25 percent Rhododendronis expected with moderate trampling pressure . However, vegetation albiflorum , Alnusrecovery from season to season will be slight with rapid deterioration sinuata, Salixunder constant use . There is a probability <strong>of</strong> a change in species monticolacomposition . The nature <strong>of</strong> <strong>the</strong> vegetation discourages randomtrampling .3 Moderate susceptibility to damage . Between 25 and 50 percent <strong>of</strong> Luetkea pectinata,vegetation cover will likely be lost with moderate trampling Carex nigricanspressure . Good vegetation recovery from season to season is north slopeexpected with slow deterioration upon constant use . Only a slight community,change in species composition is likely . Some areas are very un- Carex nigricanssuitable for use because <strong>of</strong> poor drainage conditions .seepage community4 Moderately high susceptibility to damage . A 50 to 70 percent loss Cassiope<strong>of</strong> vegetation cover is expected with moderate trampling pressure ._mertensianaThere will be virtually no recovery <strong>of</strong> dominant vegetation fromseason to season and a great change in species composition is likely .5 High susceptibility to damage . A 70 to 90 percent loss <strong>of</strong> vegetation Valeriana sitchenais ,cover is expected with moderate trampling pressure and even lowLuzula glabratatrampling intensities will probably cause a great vegetation loss .Chances <strong>of</strong> vegetation recovery from one season's use are good but willprobably deteriorate rapidly with continued use . A great change inspecies composition is likely .6 Great susceptibility to damage . From 70 to 90 percent <strong>of</strong> vegetation Vacciniumcover will likely be lost with moderate trampling pressure . Little membranaceumrecovery <strong>of</strong> <strong>the</strong> dominant vegetation can be expected from season toseason and <strong>the</strong>re is <strong>the</strong> possibility <strong>of</strong> a great change in speciescomposition .7 Extreme susceptibility to damage . Greater than 90 percent <strong>of</strong> <strong>the</strong> Eriophorumvegetation cover will probably be lost with moderate trampling and polystachionregeneration will be slow because <strong>of</strong> <strong>the</strong> production <strong>of</strong> quagmireconditions .*Refer to Ecological Assessment <strong>of</strong> <strong>the</strong> <strong>Summit</strong> <strong>Area</strong>, <strong>Mount</strong> <strong>Revelstoke</strong> National Park(Landals and Scotter, 1974) for descriptions <strong>of</strong> plant communities .
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