Recovery Plan for the Northern Spotted Owl - DRAFT

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continued-Common Name Causal Agent Tree SpeclesEast Cascades SubregionDEFOLIATORSDouglas-fir tussockmothWestern spruce budwormLarch sawflyLarch casebearerTERMINAL MINERSWestern pine shootborerOrygia pseudotsugataChoristoneura occidental/sPristiphora erichsoniiColeophora far/celiaEucosma sonomonaDouglas-fir, ponderosapineDouglas-fir, grand fir,larchLarchLarchPonderosa and lodgepolepinesBARK BEETLES AND PINHOLE BORERSDouglas-fir beetleMountain pine beetleRed turpentine beetlePine engraver beetleFir engraverWestern pine beetleAmbrosia beetleSCALES AND APHIDSCooley spruce gallaphidDendroctonus pseudotsugaeDendroctonus ponderosaeDendroctonus valens/Ps spp.Scolytus ventral/sDendroctonus bre vicorn/sPlatypus spp., Gnathotr/chusspp., Trypodendron spp.Adelges cooleyiDouglas-firPonderosa, white, lodgepolepinesPinesPinesTrue firsPonderosa pineAll conifersDouglas-fir, spruceiiBalsam wooly adelgidAdelges piceaeCARPENTER ANTS AND WOOD BORERSCarpenter antCamponotus pennsylvanicusGrand firAll speciesWood borerBuprestids and CerambycidsAll conifersSource- Furniss and carolin (1977), Pettinger and Goheen (1982), Holsten et al (1985), Hagle et al. (1987), Johnson and Lyon (1988). and Partridgeet al (undated)I'll I I I- ,- 11.11 I 11.1.1- 1.1- 1 .....J436
Insects cause many problems in Pacific Northwest forests and there are thousandsof species (Furniss and Carolin 1977). Only a few, however, have majorimpacts on forests. Insects in Table F.4 are listed according to their activity inforests; e.g., defoliators, terminal miners, bark beetles, aphids and scale insects,and wood borers. Other parts of trees, such as cones, are affected, butthese are not included in Table F.4 because they have little impact on foreststructure. Note that there are generally fewer insect species having a majorimpact on forests in the West Cascades subregion than in the other two subregions.Defoliators and bark beetles are important in the East Cascades andKlamath subregions. There, they can create large landscape level disturbancecausing tree mortality over thousands of acres. In the West Cascades subregiondisturbances are smaller, but occasionally large epidemics of defoliatorsoccur; e.g., the western hemlock looper which had outbreak periods in 1889-1991, 1911-1914, 1929-1932, 1943-1946, and 1961-1963. These outbreaksgenerally occurred in extensive old-growth hemlock stands (Furniss andCarolin 1977).Each insect has its own ecological niche and function in western forests andeach kind of tree is host to many insects. Some tree species, however, aremore attractive to insects than others. For example, Pines and oaks are infestedby far more insects than are redwoods and yew. Some insects play amajor role in the life cycle and structure of extensive forest areas, such as thewestern pine beetle in ponderosa pine forests (Furniss and Carolin 1977). Withforest harvesting and management many of these insects became destructiveand now are controlled artificially.Most western forest insects are native, although a few, such as the balsamwooly adelgid, have been introduced. Numbers of insects tend to fluctuatewidely and some periodically become epidemic, such as the Douglas-fir tussockmoth and spruce budworm. A number of bark beetle species also has becomeepidemic, especially in drier areas. Fire control practices and early forest harvestingpractices in the last 75 years are generally thought to have contributedto increases in bark beetle populations by creating populations of stressedtrees. Bark beetles tend to cause the highest amounts of insect-related mortality.In healthy ecosystems insects generally remain in small numbers withoutbreaks often precipitated by plant stress (e.g., caused by drought, nutrientdeficiencies, and air pollution). With predicted global climate change, manyplant species could become stressed as temperature and precipitation changebeyond their tolerance level (Perry and Borchers 1990). This, plus the fact thatinsect populations usually grow faster in warmer, drier climates, could lead tolarge outbreaks. However, climate changes may suppress some insects.Defoliating insects cause reduced radial growth and height increment, topkilling,and reduced regeneration; they also sometimes kill extensive stands(Swetnam and Lynch 1989). Heavy defoliation by Douglas-fir tussock moth ofDouglas-fir and grand fir in north central Idaho caused growth of host speciesto decrease 75 to 90 percent in 1 year (Brubaker 1978). Normal growth ratesreturned 3 to 4 years after maximum defoliation, however. Some researchersreport increased radial growth of trees after defoliation (Stoszek 1988.Wickman 1990). Lowest levels of defoliation usually are associated with laterstages of succession (old-growth) (Stoszek 1988).Many of the trees killed by bark beetles and defoliators also are being attackedby root diseases and it is sometimes difficult or even impossible to separate theeffects of insects and diseases, especially in drier forest types. Snags and downwood from insect-killed trees increase forest-fire hazard but provide importantwildlife habitat.437
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I 1.2:Sp 6/draftRecovery Plan for t
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List of FiguresTable 4.1 Abbreviate
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Recovery ObjectiveSecretary of the
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Management Rules for Designated Con
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Monitoring and Research ProgramThe
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Chapter IIntroduction1
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"Threatened species" means a specie
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B. The Interagency Scientific Commi
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lished works and many government do
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II.A. Natural History of theNorther
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I- \IzXelT - - -.11 I..., ... I.."
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spring. Territories probably are sm
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Northern goshawks (Accipiter gentil
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also use a variety of nest sites in
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Home Range SizeHome range is define
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Table 2.2. Median amounts of old-gr
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3. Life Historycannot reject the hy
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Dispersal1984, Thomas et al. 1990,
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4. ConclusionOur knowledge of the n
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Ca n a d aEastern Washington Cascad
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Table 2.3. Estimated spotted owl ha
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Table 2.4. Significant threats to t
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Table 2.5. Results of surveys for s
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isolated. In these provinces, small
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centers for 30 to 35 spotted owl te
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Southwest Washington occupies a key
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Distribution of Habitat and Populat
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Province Isolation. The eastern Was
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were in suitable habitat condition.
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Estimated acres of forest landbase:
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owned and contain little suitable h
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Vulnerability to Natural Disturbanc
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Douglas-fir/hardwood types, the lat
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miles from the contiguous populatio
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In comparison, the southern part of
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Sacramento River Canyon now provide
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On January 11, 1980, there was an a
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vation Strategy for the Northern Sp
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transfer of one area to the Grand R
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The BLM Spokane (Washington) Distri
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3. National Park ServiceThe followi
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The results of a consultation are s
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- Since landowners already face cut
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4. Cumulative Effects AssessmentThe
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Assessment, Planning, and Monitorin
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Spotted owl nesting sites and activ
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Coastal Oregon Productivity Enhance
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including wildlife. In other cases,
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Currently, the Yakima Indian Nation
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where timber harvest is limited to
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III.A. Recovery Objective and Delis
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4. The population is unlikely to ne
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Needs of other species should be co
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years. The strategy of managing for
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't0
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Finally, the plan recommends mainta
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A total of 1,181 pairs of owls has
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DKnown owlsin the OregonprovincesKn
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mologists, and representatives of o
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this prey species is an appropriate
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After 100 years residual snags will
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2. Fuelwood Gathering. If allowed,
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The application of prescriptions A,
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owls. (Refer to tables in section I
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PRESCRIPTION D -RETAIN OWLS IN MANA
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126
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DCA Management Plans.The recovery p
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Endangered Species Act) or through
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6. Costs to landowners should be re
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The real or perceived disincentives
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authority of the public body to ent
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* Use the recovery plan's recommend
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140
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Supplemental pair areas - Habitat d
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Numbers of owls currently are estim
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Biological goals and implementation
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ning. Also, several unsurveyed area
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Owl pairsKnown owlsin the province3
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- Initiate long-range planning effo
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Table 3.8. Summary comments on the
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from nonfederal lands are needed to
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Eastern Washington Cascades Provinc
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(Owl pairs140 - _ _ _ _ _ _ _ _ _ _
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habitat in DCA WD- 16. Approximatel
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Table 3.12. Summary comments on the
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Ttllwrnook/Astoria area. Provide su
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connectivity between key DCAs. This
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ITable 3.14. Summary comments on th
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crest of the Cascade Mountains. The
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sites on federal lands (figure 3.21
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Owl pairsL I 350- _ _ . ...........
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DCAs, often combined with adjacent
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Owl pairsLiKnown owlsin the provinc
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nesting and roosting habitat until
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Option 3: Management of clusters: g
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Table 3.21. Summary of acreage and
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Owl pairs -Known owlsin the provinc
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and to within 0.5 miles of the acti
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Spotted owls have been found at 86
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their distance from other sites. Ar
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* Recommend population and habitat
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away in some or all of the range. D
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4. What are the population dynamics
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If the monitoring and research prog
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lowlands, eastern Oregon Cascades,
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210
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Stepdown Outline1. Management Tasks
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Table 4.1 Abbreviated Cost TableThe
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continued-TaskPriorityResp. PartyCo
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218
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220
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and the number of invertebrate anim
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Table 5.2. Numbers of other species
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Amphibians and Reptiles: Larch Moun
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228
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230
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Barrows, C. W. 1980. Feeding ecolog
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Clark, R. J., D. G. Smith, and L. H
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Franklin, A. B., J. A. Blakesley, a
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Harestad, A. S., and F. L. Bunnell.
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Lundquist, R. W. and J. M. Mariani.
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O'Halloran, K. 1989. Spotted owl in
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Solis, D. M. 1980. Habitat use by n
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Young, K. D., A. B. Franklin, and J
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248
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250
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Table A.1. General approaches for e
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complete count of the territorial b
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Table A.3. Powera for various desig
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Table A.4. Illustration of a Markov
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Obviously, these statements hold on
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Table A.6. Reliability of trend est
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Demographic AnalysisAs noted earlie
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the estimate (using the simple equa
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however, we know little about the b
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Table A.8. Summary of information n
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predict the power achieved by diffe
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Other studiestached. If dispersing
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impractical at present. We describe
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Conclusionsthe year effect can be i
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280
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282
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284
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owls. Consequently, the issue of wh
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Use of the informationAssessments a
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Recent LiteratureWe might begin by
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Kerms (1989) measured habitat struc
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Hamer (pers. comm.) described 11 ne
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Table B.3. Percent hardwoods in the
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Table B.5. Comparison of habitats u
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Table B.8. Tree density (number of
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and numbers of trees, and percent o
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Under this hypothesis, owl fitness
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suitable habitat for that region (m
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ResultsDiscussionspotted owl habita
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__Discussiondata from 41 sites in t
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Recommendations for Future Research
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314
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Hamer, T. 1988. Home range size of
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318
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320
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Parameter Estimatesfor Individual S
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provided in Table C. 5. Study of th
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Table C.6. Summary of statistics re
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3. ConclusionsThis source of bias i
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330
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Gray Wolf .........................
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formed during the initial meeting t
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provide habitat for the numerous sp
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The ApproachA committee of the Reco
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The List of Threatened and Endanger
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Mammalsoldest trees in a stand. Eig
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ABBFigure D. 1. Distribution of: a)
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KTable D.3. A list of threatened an
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Fishestheir dispersal capabilities
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OlympicNorthcoastalRockyMountainSou
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continued-StatusabState Considered
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continued-SpeciesColumbia sidebandM
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endemic to the Pacific Northwest).
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------continued-SpeciesRhyacophila
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continued-SpeciesFed3tatusa bStateW
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StatusasbOld ForestState Associatio
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Summaryspores (Maser et al. 1978b).
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Biology of Owl Prey, Older Forest A
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Woodrats.-The dusky-footed woodrat
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and are less restrictive under stat
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Stock concept.-The term "stock" was
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Table D.10. List of fish stocks of
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continued-Steelhead-owipu Sea-runTr
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continued-BasinHoodWillametteRogueS
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Table D.13. Washington streams (or
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inland distribution currently decre
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nesting territories in the three st
Page 402 and 403: However, little is known about the
Page 404 and 405: Fisher (Martes penncmti)Distributio
Page 406 and 407: at one time supported marten popula
Page 408 and 409: each population of these animals is
Page 410 and 411: species also is found under the bar
Page 412 and 413: few meters from water after heavy r
Page 414 and 415: In considering the needs of other s
Page 416 and 417: Barrows, C. W. 1981. Roost selectio
Page 418 and 419: Clark, T. W., E. Anderson, C. Dougl
Page 420 and 421: Hamer, T. E. 1991. Habitat relation
Page 422 and 423: Mannan, R. W., E. C. Meslow, and H.
Page 424 and 425: Oakley, A. L., Collins, J. A., Ever
Page 426 and 427: Solis, D. M. 1983. Summer habitat e
Page 428 and 429: Washington Natural Heritage Program
Page 430 and 431: 414
Page 432 and 433: f. Wilderness.g. Livestock grazing.
Page 434 and 435: I. Monitoring.1. Northern spotted o
Page 436 and 437: 420
Page 438 and 439: here will reduce some of that habit
Page 440 and 441: 424
Page 442 and 443: 426
Page 444 and 445: Selection of Forest TypesAt the tim
Page 446 and 447: eceive as little as 25 inches. Disc
Page 448 and 449: A. FireThe combination and interact
Page 450 and 451: Table F.4. Important forest insects
Page 454 and 455: D. DiseasesForest diseases in the P
Page 456 and 457: continued-Common Name Causal Agent
Page 458 and 459: continued-Common Name Causal Agent
Page 460 and 461: III. Forest Protection in theWest C
Page 462 and 463: 120 100200 500I~~~~.K446Figure F.4.
Page 464 and 465: InsectsDiseasesInsects in this subr
Page 466 and 467: __hardwoods are immune. Shade toler
Page 468 and 469: pests (Schowalter 1988). Black stai
Page 470 and 471: tion and initial attack. If manipul
Page 472 and 473: log and snag density was likely low
Page 474 and 475: B. Management Effects on StandsMana
Page 476 and 477: units (underburning or lop/scatter)
Page 478 and 479: In the higher elevation White Fir a
Page 480 and 481: growth often increases (Reinhardt a
Page 482 and 483: 50rcc4*0-cC)2M CmZ13010-yearI ,...*
Page 484 and 485: In the East Cascades subregion fore
Page 486 and 487: The introduced disease, white pine
Page 488 and 489: VI. Conclusionsmortality will resul
Page 490 and 491: Baker, F.A. 1988. The influence of
Page 492 and 493: Habeck, J.R. 1990. Old-growth ponde
Page 494 and 495: Perry, D.A., and J.G. Borchers. 199
Page 496 and 497: Weatherspoon, C.P., and C.N. Skinne
Page 498 and 499: 482
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area, structure, ages, location; ne
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Stand AFigure G.2. A--unthmnned Dou
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figure 0.3. Effects of thinning Dou
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II. Review of Natural Vegetation an
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western hemlock, and sometimes othe
Page 512 and 513:
year intervals (Appendix F). With t
Page 514 and 515:
Live crown ratiobecent)6050IStand A
Page 516 and 517:
Basal area growth continued to incr
Page 518 and 519:
technology probably will allow some
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Stand A. No activities (west side 3
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Stand A. No activities (west side o
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acre, 4 to 12 inches in diameter),
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allow redwood sprout clumps maximum
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KAge 15 years - 511 trees per acre,
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6Stems per acre100 _ Stand A. Natur
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Basal Area(square feetper acre)50 1
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* Opening the canopy in small patch
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Drew, T.J. and J.W. Flewelling. 197
Page 538 and 539:
Miller, R.E.; D.L. Reukema, and R.L
Page 540 and 541:
Tappeiner, J.C., P.M. McDonald, and
Page 542 and 543:
526
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528
Page 546 and 547:
6. Timber supply curve and economic
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scientifically credible biological
Page 550 and 551:
E. Summary of Preliminary Estimates
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II. General Economic Principles for
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practices may be able to show how s
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Economic patterns show the efficien
Page 558 and 559:
The sustainable yield concept that
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A. Previously Estimated Economic Co
Page 562 and 563:
County receipts were estimated to d
Page 564 and 565:
B. Potential Social Costs of Owl Co
Page 566 and 567:
The contrast between the behavior d
Page 568 and 569:
0U1 n1nDTable H.2. Economic depende
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cḻlTable H.4. Economic characteri
Page 572 and 573:
An analysis completed by the State
Page 574 and 575:
V. Preliminary Evaluation of the Ec
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25-° 20/0M 15-a)CLU)0 10-0CL 5 -0)
Page 578 and 579:
25 -- 20-0co/o 15--Da)a0a)10m~ C) 5
Page 580 and 581:
forestlands. The costs of productio
Page 582 and 583:
In Figure H.8, the equilibrium betw
Page 584 and 585:
foregone and the way they will save
Page 586 and 587:
The income created by the purchase
Page 588 and 589:
Two concepts are useful for underst
Page 590 and 591:
y an estimate of the price that wou
Page 592 and 593:
Table H.10. Comparison of timber em
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of the second year. The same assump
Page 596 and 597:
are generally much lower than for c
Page 598 and 599:
582
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studies at University of Washington
Page 602 and 603:
586
Page 604 and 605:
Most significant late successionall
Page 606 and 607:
to evaluate options. Information in
Page 608 and 609:
Q0Table 1.1. Estimated acres and ow
Page 610 and 611:
soTable 1.3. Estimated acres and ow
Page 612 and 613:
01CDarTable 1.5. Size class distrib
Page 614 and 615:
Table 1.8. Frequency distribution o
Page 616 and 617:
Literature CitedThomas, J.W., E.D.
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602
Page 620 and 621:
- The overlap of home ranges among
Page 622 and 623:
Table J.2. Acreage and owl numbers
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continuedDCA Land AcreageIdent. Sta
Page 626 and 627:
Page 628 and 629:
Page 630 and 631:
Page 632 and 633:
Page 634 and 635:
Table J.9. Acrea ?e and owl numbers
Page 636 and 637:
Page 638 and 639:
continued-DCA LandIdent. StatusAcre
Page 640 and 641:
-DCAIdent.LandStatusAcreageNRF Tota
Page 642 and 643:
626
Page 644 and 645:
Experience Includes: Assistant Dire
Page 646 and 647:
Education: B.S. in forestry from Or
Page 648 and 649:
Team SupportCharles Bruce, Oregon D
Page 650 and 651:
continued-1 5-24-91 Other SpeciesSu
Page 652 and 653:
continued-9-16 thru9-20-919-19-91Sp
Page 654 and 655:
Perry, D. 1991. The ecology of coar
Page 656 and 657:
2mandate the achievement of recover
Page 658 and 659:
642
Page 660 and 661:
644
Page 662 and 663:
Aspect - the direction a slope face
Page 664 and 665:
Congressionally classified and desi
Page 666 and 667:
Empirical - derived from direct obs
Page 668 and 669:
Hummocky - a landscape characterize
Page 670 and 671:
Mixed conifer - as used in this doc
Page 672 and 673:
Potential habitat - a stand of tree
Page 674 and 675:
Sensitive species - those species t
Page 676 and 677:
Take -Uunder the Endangered Species
Page 678:
wild, scenic, or recreational by an
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Recovery Plan for the Northern Spotted Owl - DRAFT

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