Recovery Plan for the Northern Spotted Owl - DRAFT

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endemic to the Pacific Northwest). Many of the species native to this regionhave not been described or named, and the number of known species probablyrepresents less than half of the estimated species (J. Lattin, Oregon StateUniversity, pers. comm.).Twenty-three species of terrestrial arthropods, most of which are wingless andflightless, are considered to be old-growth associates (J. Lattin, Oregon StateUniversity, pers. comm.). Camel crickets of the genus Prtstoceuthophilus andTropidischia xanthostoma are found in old-growth forests in the hemlock andsilver-fir zones, and they occur on the forest floor under logs and debris. Somespecies in this group of older-forest associates belong to very small genera andare considered rare, including Boreostolis americanus, Metrius contractus,Promecognathus laevissimus, Zacotus mnathewsti and Lobosoma honidun. Allof these species belong to genera that have only one or two described speciesand are often relics of past geologic history. One unique predator-prey relationshipexists in this group between the prey species Harpaphe haydenianaand the predator Promecognathus laevisstnus. H. haydeniana is a distinctivelymarked millipede that is a very important shredder of litter and, therefore, aninitiator of nutrient cycling. The species is marked brightly and produceshydrocyanic gas when disturbed. The production of cyanide is a deterrent tomost predators except P. laevissimus, which is specialized for feeding on thismillipede by its tolerance of cyanide gas. P. laevissimus is a terrestrial groundbeetle found in mature forests on the west side of the Cascade Mountains.There are also 17 species of insects from 13 families (Table D.7) that areassociated with coarse woody debris in western coniferous forests (J. Lattin,Oregon State University, pers. comm.). The decomposition of coarse woodydebris is a slow process in a natural ecosystem, and in the Pacific Northwestmany hundreds of invertebrate species have evolved to utilize logs for food orhabitat (Schowalter et al. 1991, Parsons et al. 1991, Moldenke, unpublisheddata). Though many of these species may have similar ecologic roles, thenatural process is not understood enough to know whether some or many areredundant for system function. However, the diversity of species itself may bea useful management tool to detect changes in the effects that logs may beexerting on the old-growth system.Vascular PlantsOne hundred and forty-four species of vascular plants that occur within therange of the northern spotted owl are older-forest associates or are listed as"species of special concern" by one or more of the three states (Table D.8).Seventy-six of the species on the list are associated with older forest ecosystems(Ruggiero et al. 199 lb). These plants include several species that havegenerated significant interest including the Pacific yew and Port Orford cedar.The Pacific yew especially is of interest because of the chemical taxol, whichcan be extracted from yew bark and is being tested as an anti-cancer drug.Port Orford cedar occurs only in a restricted area of northwestern Californiaand southwestern Oregon and is susceptible to root disease. No opportunitieswere identified specifically to provide measures to benefit these species, butmanagement of habitat for owls is likely to provide them with habitat support.Fungi and LichensThe list of fungi and lichens contains eight species. These species were identifiedas older-forest associates by Ruggiero et al. (1991b), and of these, two arespecies of special concern in one or more of the three states. Lichens of the356
Table D.6. List of threatened, endangered, candidate, sensitive, or older-forestassociated arthropods in the range of the northern spotted owla.StatusbState Old Forest RiparlanSpecies Fed WA OR CA Associate AssociateInsectsOrthoptera:Boonacris alticolaXPristoceuthophilus celatusXPristoceuthophilus cercalisXPristoceuthophilus sargentaeXTropidischia xanthostomaXHemiptera:Boreostolis americanusXPlinthisus longisetosusXThylochromus nitidulusXEurychilopterella sp.XPhytocoris nobilisXPithanus maerkeliiXPolymerus castellaeniXVanduzeenia borealisXAcalypta lillianisXAcalypta saundersiXDerephysia foliaceaXColeoptera:Cychrus tuberculatusXMetrius contractusXPromecognathus laevissimusXZacotus mathewsiiXOmus dejeaniXLobosoma horridumXAcneus beeri C2 XAcneus bumelliC2Cicindela columbicaXPterostichus rothiPlecoptera:Nemoura wahkeena C2 XSolperia fenderi C2 XTrichoptera:Eobrachycentrus gelidae C2 XAgapetus denningi C2 XHomoplecta schuhi C2 XOchrotrichia alsea C2 XLepidostoma goedeni C2 XApatania tavaia C2 XFarula davisi C2 XFarula jewetti C2 XFarula reaperi C2 XLimnephilus alconura C2 XLimnephilus atereus C2 XNeothremma andersoni C2 XOligophlebodes mostbento C2 XPhilocasca oron C2 XDolophilodes oregona C2 XTinodes siskyou C2 XRhyacophila ambilis C2 Xcontinues-357
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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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Page 324 and 325: ResultsDiscussionspotted owl habita
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Page 328 and 329: Recommendations for Future Research
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Page 332 and 333: Hamer, T. 1988. Home range size of
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Page 338 and 339: Parameter Estimatesfor Individual S
Page 340 and 341: provided in Table C. 5. Study of th
Page 342 and 343: Table C.6. Summary of statistics re
Page 344 and 345: 3. ConclusionsThis source of bias i
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Page 348 and 349: Gray Wolf .........................
Page 350 and 351: formed during the initial meeting t
Page 352 and 353: provide habitat for the numerous sp
Page 354 and 355: The ApproachA committee of the Reco
Page 356 and 357: The List of Threatened and Endanger
Page 358 and 359: Mammalsoldest trees in a stand. Eig
Page 360 and 361: ABBFigure D. 1. Distribution of: a)
Page 362 and 363: KTable D.3. A list of threatened an
Page 364 and 365: Fishestheir dispersal capabilities
Page 366 and 367: OlympicNorthcoastalRockyMountainSou
Page 368 and 369: continued-StatusabState Considered
Page 370 and 371: continued-SpeciesColumbia sidebandM
Page 374 and 375: ------continued-SpeciesRhyacophila
Page 376 and 377: continued-SpeciesFed3tatusa bStateW
Page 378 and 379: StatusasbOld ForestState Associatio
Page 380 and 381: Summaryspores (Maser et al. 1978b).
Page 382 and 383: Biology of Owl Prey, Older Forest A
Page 384 and 385: Woodrats.-The dusky-footed woodrat
Page 386 and 387: and are less restrictive under stat
Page 388 and 389: Stock concept.-The term "stock" was
Page 390 and 391: Table D.10. List of fish stocks of
Page 392 and 393: continued-Steelhead-owipu Sea-runTr
Page 394 and 395: continued-BasinHoodWillametteRogueS
Page 396 and 397: Table D.13. Washington streams (or
Page 398 and 399: inland distribution currently decre
Page 400 and 401: 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
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Mannan, R. W., E. C. Meslow, and H.
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Oakley, A. L., Collins, J. A., Ever
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Solis, D. M. 1983. Summer habitat e
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Washington Natural Heritage Program
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414
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f. Wilderness.g. Livestock grazing.
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I. Monitoring.1. Northern spotted o
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420
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here will reduce some of that habit
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424
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426
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Selection of Forest TypesAt the tim
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eceive as little as 25 inches. Disc
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A. FireThe combination and interact
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Table F.4. Important forest insects
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continued-Common Name Causal Agent
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D. DiseasesForest diseases in the P
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III. Forest Protection in theWest C
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120 100200 500I~~~~.K446Figure F.4.
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InsectsDiseasesInsects in this subr
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__hardwoods are immune. Shade toler
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pests (Schowalter 1988). Black stai
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tion and initial attack. If manipul
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log and snag density was likely low
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B. Management Effects on StandsMana
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units (underburning or lop/scatter)
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In the higher elevation White Fir a
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growth often increases (Reinhardt a
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50rcc4*0-cC)2M CmZ13010-yearI ,...*
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In the East Cascades subregion fore
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The introduced disease, white pine
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VI. Conclusionsmortality will resul
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Baker, F.A. 1988. The influence of
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Habeck, J.R. 1990. Old-growth ponde
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Perry, D.A., and J.G. Borchers. 199
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Weatherspoon, C.P., and C.N. Skinne
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482
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484
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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
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year intervals (Appendix F). With t
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Live crown ratiobecent)6050IStand A
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Basal area growth continued to incr
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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
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Miller, R.E.; D.L. Reukema, and R.L
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Tappeiner, J.C., P.M. McDonald, and
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526
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528
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6. Timber supply curve and economic
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scientifically credible biological
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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
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The sustainable yield concept that
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A. Previously Estimated Economic Co
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County receipts were estimated to d
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B. Potential Social Costs of Owl Co
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The contrast between the behavior d
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0U1 n1nDTable H.2. Economic depende
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cḻlTable H.4. Economic characteri
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An analysis completed by the State
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V. Preliminary Evaluation of the Ec
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25-° 20/0M 15-a)CLU)0 10-0CL 5 -0)
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25 -- 20-0co/o 15--Da)a0a)10m~ C) 5
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forestlands. The costs of productio
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In Figure H.8, the equilibrium betw
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foregone and the way they will save
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The income created by the purchase
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Two concepts are useful for underst
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y an estimate of the price that wou
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Table H.10. Comparison of timber em
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of the second year. The same assump
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are generally much lower than for c
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582
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studies at University of Washington
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586
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Most significant late successionall
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to evaluate options. Information in
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Q0Table 1.1. Estimated acres and ow
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soTable 1.3. Estimated acres and ow
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01CDarTable 1.5. Size class distrib
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Table 1.8. Frequency distribution o
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Literature CitedThomas, J.W., E.D.
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602
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- The overlap of home ranges among
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Table J.2. Acreage and owl numbers
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continuedDCA Land AcreageIdent. Sta
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Table J.9. Acrea ?e and owl numbers
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continued-DCA LandIdent. StatusAcre
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-DCAIdent.LandStatusAcreageNRF Tota
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626
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Experience Includes: Assistant Dire
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Education: B.S. in forestry from Or
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Team SupportCharles Bruce, Oregon D
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continued-1 5-24-91 Other SpeciesSu
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continued-9-16 thru9-20-919-19-91Sp
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Perry, D. 1991. The ecology of coar
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2mandate the achievement of recover
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642
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644
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Aspect - the direction a slope face
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Congressionally classified and desi
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Empirical - derived from direct obs
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Hummocky - a landscape characterize
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Mixed conifer - as used in this doc
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Potential habitat - a stand of tree
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Sensitive species - those species t
Page 676 and 677:
Take -Uunder the Endangered Species
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wild, scenic, or recreational by an
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Recovery Plan for the Northern Spotted Owl - DRAFT

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