ENVIRONMENTAL CONSEQUENCES in rocky mountain coniferous ...

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As shown in figure 10, soil water status was relatively stable in the lower soil profiles and more erratic in the upper profiles . Of course, the upper profiles were responding to precipitation as well as intensive water consumption by the lower vegetation. Since vegetative demand for water was high at the beginning of the growing season, and soil moisture was below field capacity, little if any precipitation passed through the upper soil profile before it was extracted by the vegetation. 15 20 25 30 35 15 20 25 30 35 15 20 25 30 35 SOIL WATER (PERCENT VOLUME) SOIL WATER (PERCENT VOLUME) Figure 10.--Soil water status throughout the soil profile 2 years after harvesting a Zarch/fir forest. Note t h seasonal ~ shift of the soil water status curves at a22 soil depths in the uncut control; the shift, primarizy in the upper soil profile, of the she Ztemood (residuesremoved subtreatment); and the very slight seasonu2 shift in the soil waker stutus curves of the dearcut (conventionaZ-uti lization-andburn subtreabent) .
SILVICULTURE TREATMENTS Si 1 vicul tural treatments produced the most differences in soi 1 moisture levels , as illustrated in figure 9. Differences were generally most apparent at the end of the growing season. Clearcuts retained the highest percentage of moisture and the uncu t-ma ture stands the 1 owes t percentage. Soi 1 moi s ture level s i n s he1 terwood and group-selection treatments ranged between these two extremes. For the 3-year period, the cl earcu t , group-sel ection , and shel terwood treatments averaged 14, 8, and 5 percent more soil moisture than in the mature forest at the end of the growing season in the lower elevation replicate and 9, 11, and 2 percent more, respectively, in the upper replicate. More precipitation was received in the upper replicate, which decreased soi 1 moisture deficits . Snowmel t recharged the soils under all treatments to about their same respective 1 eve1 s each year, wi th he exception of the spring of 1977. This year, the uncutcontrol areas failed to reach full recharge by roughly 1.7 inches (4.3 cm) of water. Soil moisture levels in the fa1 1 of 1976 were about normal , but a below average snowpack that winter fa led to produce enough water to overcome the fa1 1 deficit in the uncut controls (fig 9). . The harvested areas came into winter with less of a deficit than the contro 1 s ; the snowpack, even though below normal , was adequate to recharge those profiles. For example, at the end of the 1976 growing season, soi 1s under the uncut-control stands needed 5.4 inches (13.7 cm) to reach recharge while those in the shel terwood and clearcut needed 4.1 and 2.6 inches (10.4 and 6.6 cm) , respectively. Another contributing factor discussed earl ier was i ncreased snow accumulation in the clearcuts, group selections , and shel terwoods i n re1 ation to the mature forest--a result of redistribution. RESIDUES TREATMENTS No consistent trends or differences in soil water status, could be attributed solely to the various residue treatments. Water Use The uncut mature larchlfir forest within the study area used about 75 percent of the 24-i nch (61-cm) average annual on-si te precipitation. Water use wi thin the treatments was nearly always less than that of the uncut forest but varied substan- tially by treatment and year, A detailed summary of water use by silvicul tural and residue treatment for 3 years of the study are presented in appendix E.
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ENVIRONMENTAL CONSEQUENCES OF TIMBE
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USDA Forest Service General Technic
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REW 'ORD One of the pressing proble
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BIOLOGICAL IMPLICATIONS Biological
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By the mid-1 960's the apparently u
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Scientist, audience: "The Three-Mil
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I believe that the future of forest
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enewable resource that can be proce
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productive capacity. Recent legisla
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Much of the research investigating
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Six sale area blocks were logged (f
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Understory Removal Figure 4.--Eccpe
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Gentle slopes and easy access to cu
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Each of the four cutting units was
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A concerted effort was made to coor
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oriented toward the basic response
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WOODY MATERIAL IN NORTHERN ROCKY MO
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STANDING, 3 " 1 DIA. ? (GREEN & DEA
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I 11 Table 1,--Volume of wood by co
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Small material under 3 inch (7.6 cm
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Depending on the cutting and treatm
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MICROENVIRONMENTAL RESPONSE TO HARV
Page 45 and 46: I Where: Cs is the concentration at
Page 47 and 48: Figure I.-- Residue treatments used
Page 49 and 50: HARVESTING AND RESIDUE INFLUENCES R
Page 51 and 52: I 1 1 1 1 1 1 1 1 1 1 1 JAN. FEB. M
Page 53 and 54: Sensible heat flux, evaporative flu
Page 55 and 56: SOLO, 1977- 78 UNCUT CUT Mean max.
Page 57 and 58: It is logical that if surface tempe
Page 59 and 60: 0 - 5 - 10 - 15 20 - Chips - Clrare
Page 61 and 62: Brown, crumbly, decayed material (B
Page 63 and 64: At Coram, steep harvested slopes ha
Page 65 and 66: surface of unburned and hard-burned
Page 67 and 68: canopy. Light then indirectly cause
Page 69 and 70: Moisture Moisture is frequently ide
Page 71 and 72: Net radiation--the measure of the a
Page 73 and 74: Table 5.--Possible solutions for po
Page 75 and 76: Cochran, P. H. 1969. Thermal proper
Page 77 and 78: Lommen, P. W., Cr, R. Schwintzer, C
Page 79 and 80: Stark, Nel 1 ie. 1980. The impacts
Page 81 and 82: and water use during the growing se
Page 83 and 84: The main study site (fig. 1) occupi
Page 85 and 86: The four residues util i zation tre
Page 87 and 88: RAIN The major precipitation instru
Page 89 and 90: Figure 5.--SG,L. wuwr zc)as measure
Page 91 and 92: S treamf 1 ow A &foot H-flume was i
Page 93 and 94: Figure 7.--Snow water equivalent on
Page 95: Soi 1 Water Water present in the so
Page 99 and 100: As indicated in figure 11 and appen
Page 101 and 102: The most consistent difference in w
Page 103 and 104: MEAN CONSUMPTIVE USE -ALL YEARS (19
Page 105 and 106: Lowest daily water use occurred at
Page 107 and 108: 6. Water use began in Apri 1 , acce
Page 109 and 110: Klages, M. G., R. C. McConnell , an
Page 111 and 112: APPENDICES Appendix A.--Hydrograph
Page 113 and 114: Appendix C.--Rainfall reaching the
Page 115 and 116: Appendix E.--Water use during the g
Page 117 and 118: One of the most efficient methods o
Page 119 and 120: Control Chipped Picked up Broadcast
Page 121 and 122: Control Chapped Picked up Broadcast
Page 123 and 124: Control Chipped Picked up Broadcast
Page 125 and 126: ' Control Chipped and Picked up and
Page 127 and 128: One of the least detrimental residu
Page 129 and 130: INTRODUCTION In the early days, the
Page 131 and 132: %pire 1.--Measured concentrations (
Page 133 and 134: The silvicul tural treatments appli
Page 135 and 136: I 2 Table 2. --Percent of total qua
Page 137 and 138: Unmerchantable TOP Shrubs Lower Cro
Page 139 and 140: create a nitrogen deficiency during
Page 141 and 142: Steele, R. W. 1975. Understory burn
Page 143 and 144: National Forest. This paper summari
Page 145 and 146: UNIT 2 CONVENT IONALLY Du Bois, Wyo
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Trees Figures 3 and 4 show the oven
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Weights of typical trees on these t
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pi1 ed-burned treatments were lowes
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MINERAL SOIL Total nutrient content
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Tab1 e 5. --Concentrations of avai
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Table 6. --Average concentrations o
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sites. Burning then transformed the
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RESIDUE DECAY PROCESSES AND ASSOCIA
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The hardwood or angiospermous timbe
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Woody Substrates Gyrnnospermsr (Int
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Natural inoculation of residues may
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On the Coram site, brown-rot fungi
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Table 2.--Probability (P) of encoun
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Recognizable brown-cubical decayed
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I Newly formed, small-dimension res
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Highley, T. L. 1976. Hemicellulases
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MICROBIAL PROCESSES ASSOCIATED WITH
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Nonsymbiotic N Fixation Free-1 ivin
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In a previous paper (Jurgensen and
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Symbiotic N Fixation The establishm
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carbon and NHq (Ahlgren, 1974). Mic
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Prescribed f~re CLEARCUT - BURN CLE
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Hungerford, R.9. 1980. Microenvi ro
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ECOLOGY OF ECTOMYCORRHIZAE IN NORTH
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Coram - Subalpine fir Site (ABLAICL
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Figure 2.-- ReZative yield capabiZi
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Figure 5. -- Percentage of soCZ-woo
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Figure 9,-- Percentage of toid ectm
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Effect of Soil Components on Ectomy
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Effect of Organic Matter Quantity o
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PARTIAL CUT Effect of Harvesting on
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Figure 20. -- Average nwnbers of ac
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Gijbl , F. 1967. Mykorrhizauntersuc
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BIOLOGICAL IMPLICATIONS Initial cha
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FOREST SOIL BIOLOGY The act of incr
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the soil will retain its ability to
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Since the best quantity of organic
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We can also visualize situations on
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Harvey, A. E., M. F. Jurgensen, and
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INTRODUCTION Vegetation integrates
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Because of cool, wet weather in 197
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We determined volume and cover usin
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The stems were divided at 4 mm (0.1
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RESIDUES TREATMENT EFFECTS As descr
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Overall shrub recovery rates do not
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Rose behaved similar to ninebark (f
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Meanwhile, small shrub cover change
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Biomass Regression analyses relatin
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SILVICULTURE TREATMENT EFFECTS Harv
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RESIDUES TREATMENT EFFECTS Major sh
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Lesser vegetation--herbs and small
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Leaf and stem components of the shr
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APPENDIX I Trees and shrubs found o
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INTRODUCTION Many western larch (La
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Figure 2. --Lower cutting blocks on
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each permanent point) of the clearc
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Figure 3.--Marking gemination and c
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were not significant. These treatme
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Tab1 e 2. --Fi 11 ed conifer seed (
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Dispersal of sound seed on the uppe
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Table $.--Number of 3- and 5-year-o
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Table 6. --Germination of conifers
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Survival, growth and form will be m
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Es tab1 ishment and Initial Develop
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to the amount of residue originally
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As the following tabulation shows,
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Soot-Seeded Broadcast burning, and
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Natural Regeneration Natural regene
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.4s shown in fig. 5, vegetation was
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Interestingly, the high phenol leve
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DeByle, Norbert V. 1980. Harvesting
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EFFECT OF SILVICULTURAL PRACTICES,
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mountain pine beetle. These two for
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GROUP SELECTION 22 CONTROL SHELTERW
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FIELD AND LABORATORY PROCEDURES To
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I Many of the groups were trapped v
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shelterwood with residues, were sig
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HARVESTING AND RESIDUE MANAGEMENT T
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indicate a treatment effect of burn
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Undisturbed Forest .". . . . Clearc
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1 equally abundant in all treatment
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I not seem to be directly caused by
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the undisturbed forests. Some resea
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Huhta, V., E. Karppinen, M. Nurmine
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POPULATIONS OF SOME FOREST LITTER,
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STUDY DESIGN The study area is loca
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GROUP SELECTION 22 CONTROL '... . .
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Sampling in 1977 was restricted to
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Table 1 .--Mean total mesofauna pop
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0 - (JUNE) from S helterwood (AUGUS
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SHELTERWOOD--RESIDUE BURNED The eff
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In the first season or two followin
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LITERATURE CITED Ahlgren, I. F. 197
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A REVIEW OF SOME INTERACTIONS BETWE
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and Keen 1960; Felix and others 197
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Pissodes strobi Peck, In a thinned
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foresters feel as though "It's 1 i
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The large aerial spray programs aga
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Weakened living trees, or trees kil
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Most western pine beetle attacks in
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The galleries, or mines, of wood bo
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Other wood borers. --Several specie
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Deterioration of spruce (Picea a. )
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The eruption of Mount Saint Helens
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Bark and engraver beetles infesting
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In the northern Rockies, one conife
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management, and not the beetle." If
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investigation regardin controlled b
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WOOD BORERS Mitchell and Martin (In
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Still, by 1938, there was a feeling
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I Different i nvesti gators have us
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if the forest floor is completely c
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Carabids as biological control agen
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een placed for protection from rode
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with every tree in the stand contin
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Spiders as predators.--Studies have
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At least two studies have been made
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In the long-leaf pine forests in th
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RESIDUES, FIRES, INSECTS, AND FORES
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In the spruce-fir stands infested w
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Recently, Senator John Me1 cher (Mo
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plans. Since fire, too, is a decomp
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CHANGING FOREST INSECT PROBLEMS Ins
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Basham, J. T. 1957. The deteriorati
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Cole, D. M. 1978. Feasibility of si
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Fellin, D. G. and P. C. Johnson. 19
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Graham, S. A. 1922. Some entomoloqi
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Huhta, V., M. Nurminen and A. Valpa
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Lawrence, W. H. and 3. H. Rediske.
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Miller, J. M. and J. E. Patterson.
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Rice, L * A. 1932. The effect of fi
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Stoddard, H. L. Sr. 1963. Bird habi
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Weaver, Harol d. 1951. Fire as an e
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RESOURCE MANAGEMENT IMPLICATIONS Th
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INFLUENCE OF HARVESTING AND RESIDUE
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F
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NEAR COMPLETE Figure 2.--Byrmnts f
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Figure 3.-- Bymrmrs fireZine intens
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F5qure 4. --Byramrs fireZ-Cne inten
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1. Nomographs of Rate of Spread, Fi
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3. Consider other fire-related fact
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Puckett, John V., Cameron M. Johnst
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Important and rapid progress has be
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tlarvested Areas What happened when
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UNCUT SHELTERWOOD Protect understor
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Initially the areas are rated low.
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The primary reason for this discrep
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f n contrast to displaced bears, so
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Quantitative data on grizzly behavi
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Asherin, Duane A. 1976. Changes in
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Leege, Thomas A. 1969. Burning sera
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Reynolds, Hudson G. 1969. Aspen gro
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INFLUENCES OF HARVESTING AND RESIDU
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CLEARCUT LOGGING & COMPLETE BURN DE
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C LEARCUT LOGGING & BROADCAST BURN
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EFFECTS OF SMALL MAMMALS ON FOREST
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I I Habitat Manipulation Small mamm
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Fala, Robert A. 1975. Effects of pr
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Tevis, Lloyd Jr. l956b. Pocket goph
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forests are cavity nesters. They ar
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GROUP SELECTION: A1 1 merchantab le
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TABLE 3. Pre- and post-logging volu
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Censuses Censuses for all species (
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Fbgure 6.-- Lightn
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Pileated Woodpeckers on the CEF nes
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TABLE 7. Percent of sampling time t
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I Observed woodpecker feeding Down,
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Table 9 shows feeding time in the l
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L c - 10- ul 2 0 8- 6 - 4 2 - - 0 .
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Figure 15. -- A Hairy Woodpecker ne
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~
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oth offered advice on study site se
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Hairy Woodpecker Downy Woodpecker B
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THE SITUATION Forest land managers
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In the descriptive approach, howeve
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ORGANIZING INFORMATION One differen
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As has already been stated, the for
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Figure 7.--Matrix of interactions b
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understory biomass density, X2 repr
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or, by rearrangement, AX. I afi Ax,
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DISCUSSION It is important to note
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LITERATURE CITED Billings, W. D. 19
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Richard T. Wick Burlington Northern
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themselves, the traditional industr
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highways. Of course, all roads are
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Darrel L. Kenops District Ranger US
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In the future we will see our const
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Lyon, L. Jack, Project Leader, Ecol
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The Intermountain Station, headquar
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