ENVIRONMENTAL CONSEQUENCES in rocky mountain coniferous ...

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BASIC ENVIRONMENTAL RESPONSES Timber harvesting removes biomass from the site, reduces vegetative cover, disturbs soil and litter, and increases exposure. Initial ecosystem responses are changes in the basic physical and biological properties and functions of the site. Micrometeorological effects may include changes in temperature, humidity, air movement, energy exchange, and significantly greater short-term fluctuations. Soil and water effects may include increased overland and subsurface flows, changes in soil moisture, and changes in soil water chemistry and nutrient availability. Microbiolo- gical effects can include changes in fungal and microbial activity, and in associated processes related to decay, nitrogen fixation, and symbiotic plant-fungi functions. Predicting the consequences of timber harvesting depends upon understanding and quantifying these basic cause-and-effect re1 ationshi ps. Program research has been heavily oriented toward studying these kinds of responses, termed "1 st order responses". Improved knowledge of how harvesting activities affect basic ecosystem character will provide the basis for prescribing harvesting practices and for predicting the consequences of a1 ternative practices. In this section, researchers report observed or measured basic environmental responses to timber harvesting, under a range of harvesting prescriptions and stand conditions. Elapsed time since treatment is short on all study sites; consequently, the results reported here must be viewed as initial, short-term results. Continuing studies will track most responses over time, and may ultimately lead to modifying the results reported here.
WOODY MATERIAL IN NORTHERN ROCKY MOUNTAIN FORESTS: VOLUME, CHARACTERISTICS, AND CHANGES WITH HARVESTING Robert E . Benson , Research Forester Joyce A. Schl ieter, Mathematical Statistician USDA Forest Service, Intermountain Forest and Range Experiment Station ABSTRACT In mature coniferous stands in the Northern Rockies, total volume of wood 3 inches in diameter (7.6 cm) and larger, ranges from 3,000 to 8,000 ft3/a (210 to 560 m3/ha). Typically about half of this volume is removed in logging, and the remaining residues include up to 50 percent or more sound wood, plus material in various stages of decay. In Wyoming, Montana, and Idaho over 450 million ft3(13 mill ion m3) of residue may be left on site annually, but residue is being utilized to meet demands for wood. KEYWORDS: wood volume, wood biomass, logging residues INTRODUCTION During the past 5 years the Residue Research Program measured and described woody material at over 3,000 sample points in mature forests and logged areas. This paper describes this effort, the woody material, and the changes in woody material that occur with harvesting. Initially, the objective of the study was to examine woody material at specific sites before and after logging, as a basis for evaluating the potential for utilizing logging residues and the subsequent costs per unit of volume. It soon became ap- parent that within the different disciplines involved in our research effort, researchers described the forest in various terms. The measurement job evolved into a description of woody material before and after harvest activities. This paper summarizes these studies, and more detailed data are presented in forthcoming publication^.^, I~enson, Robert E. and Joyce A. Schlieter. Forest residues in principal forest types of the Northern Rocky Mountain area. USDA For. Serv. Intermt. For. and Range Exp. Stn., Research Paper (in process). 2Benson, Robert E. and Joyce A. Schlieter. Volume and weight characteristics of a typical Douglas-fir/western larch stand, Coram Experimental Forest, Montana. USDA Intermt. Gen. Tech. Paper (in process).
Page 1 and 2: ENVIRONMENTAL CONSEQUENCES OF TIMBE
Page 3 and 4: USDA Forest Service General Technic
Page 5 and 6: REW 'ORD One of the pressing proble
Page 7 and 8: BIOLOGICAL IMPLICATIONS Biological
Page 9 and 10: By the mid-1 960's the apparently u
Page 11 and 12: Scientist, audience: "The Three-Mil
Page 13 and 14: I believe that the future of forest
Page 15 and 16: enewable resource that can be proce
Page 17 and 18: productive capacity. Recent legisla
Page 19 and 20: Much of the research investigating
Page 21 and 22: Six sale area blocks were logged (f
Page 23 and 24: Understory Removal Figure 4.--Eccpe
Page 25 and 26: Gentle slopes and easy access to cu
Page 27 and 28: Each of the four cutting units was
Page 29 and 30: A concerted effort was made to coor
Page 31: oriented toward the basic response
Page 35 and 36: STANDING, 3 " 1 DIA. ? (GREEN & DEA
Page 37 and 38: I 11 Table 1,--Volume of wood by co
Page 39 and 40: Small material under 3 inch (7.6 cm
Page 41 and 42: Depending on the cutting and treatm
Page 43 and 44: 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
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RAIN The major precipitation instru
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Figure 5.--SG,L. wuwr zc)as measure
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S treamf 1 ow A &foot H-flume was i
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Figure 7.--Snow water equivalent on
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Soi 1 Water Water present in the so
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SILVICULTURE TREATMENTS Si 1 vicul
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As indicated in figure 11 and appen
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The most consistent difference in w
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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
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Appendix C.--Rainfall reaching the
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Appendix E.--Water use during the g
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One of the most efficient methods o
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Control Chipped Picked up Broadcast
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Control Chapped Picked up Broadcast
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Control Chipped Picked up Broadcast
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' Control Chipped and Picked up and
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One of the least detrimental residu
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INTRODUCTION In the early days, the
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%pire 1.--Measured concentrations (
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The silvicul tural treatments appli
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I 2 Table 2. --Percent of total qua
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Unmerchantable TOP Shrubs Lower Cro
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create a nitrogen deficiency during
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Steele, R. W. 1975. Understory burn
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National Forest. This paper summari
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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
Page 171 and 172:
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
Page 285 and 286:
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
Page 303 and 304:
Page 305 and 306:
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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
Page 341 and 342:
Pissodes strobi Peck, In a thinned
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foresters feel as though "It's 1 i
Page 345 and 346:
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
Page 399 and 400:
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
Page 405 and 406:
Huhta, V., M. Nurminen and A. Valpa
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Lawrence, W. H. and 3. H. Rediske.
Page 409 and 410:
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
Page 451 and 452:
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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