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<br />Appendix to Question No. B
<br />
<br />1. Report No.
<br />C5U-flIR-l052-1
<br />4. Tltl.
<br />
<br />2.
<br />
<br />J. lecip..nr'. Ace...Jon N...
<br />
<br />Ecoloaical I.pacta ot SDovpack Aua-entatton in the San Juan
<br />Hounl:a1M of Colorado
<br />
<br />5. ItepotC 00..
<br /> 1916
<br />6.
<br />8. Perlor.JRA UrBanization I.port No.
<br />O. Work Unit No.
<br />1. Contract or Grane No.
<br /> 14-06-D- 7052
<br />3. Typ. of Report
<br /> '1....1 a.pore
<br />4.
<br />
<br />7. Author(o)
<br />
<br />H.rold W. Steinhoff and J.ck O. Ive. Ed.
<br />9. Performina Oraeni..tion H... and Addeo..
<br />
<br />Collea_ of Por..try aad Natural R.lauree.
<br />Colorado SCate UnLyera1ty
<br />Fort Collln., Coloredo 80523
<br />
<br />2. Span.oring Asancy N... aDd Addr...
<br />
<br />Bur.au of Recla..tloQ
<br />Buildlng 67, Donver Feder.l C.n..r
<br />Oonv.r, Colorado 80225
<br />
<br />S. Supple..ntary Not..
<br />
<br />Thl. docu.ent ~.pc...nt.. cooperative r....rch .ffort batw..D Colorado StatA UDlvaralty. the Unt..ratc7'of
<br />Colorado, aDd rort Levi. COll.... Thla raport aup.ra"., the pr.vloue Intart. Prolr... "porta 01 1971.
<br />1973, and 1975. Aleo. th1a raport ha. b..n d..ilnacad a. . cont~lbucloD to the united Nltionl Han and the
<br />Bioapber. (HAB-6) 'role...
<br />
<br />6. Ab.trac:t
<br />
<br />The (ollowtn. coaclu.lona .~rt.. the work of JJ .~lentlaca froa Colorado Itaca UDlveralt,. the U"tvI~.le,
<br />at Colorado, and rort Levi. Colla,a wbo atudlad ch.. . . of va ln I aek 011 the ICo, It... or the 811ft
<br />Juan Houncainl in Colorado frOfl 1970 eo 1975. 1. 1 o. oot 110 cion v.. .. I or, p "nt. In ehe
<br />tundra and for..t. .. . ra.dlt of lower ea ar.tur.. ...octatad vltb d..per aaovpac. .~del., w.. ~.t .p-
<br />por.ot for horba..ouo .p..i..,.ue a. ur or ..CIlO .. ueo t ur or, .. Ir_ll- poi... ':1_, I. tho
<br />i...diata zona of lover t.peraeura at IrolJlld laval. The .ff.ct OD cr... .ucb .. ....1_na,:-lpl'uCI e.te..
<br />.nll.1&on11) .ad quoUIlI a.p.a (Populuo tr..-loid..) woo I.... lb. r..ult .... a diler....' ili:hJiiiioo.. prndIWtioa
<br />at herbaceouI .peel.., but aoC of tr....or of Ca.al oa'" (OuercVII .....111t>. waJ.CII .a.::.foullcl :In, a. 110M c~t.
<br />b..a_ .n_ clur VIIry earl,. lb. 41.10, 10 b..lnntn. of .r_th p.rei.t.d thr.....h till otlulr,'.ta... of the
<br />annual cycl.. of _ae plant. but "ieb 1... ..p1tud.. "'.1'. .....d UDtver..l1y a c",-....~fftlt'..:,.,...". ....ich
<br />p.r.lttad .ach .pact.. to co.,r... lea annual cycl. la.,aara vlth a .borta.. Irowlal....aon e.ua.d~by lre.ta~
<br />d.pth of aODl/P..k. Ph,to.dClOlo.t..x .tud1.. 10 both tor..ta aod tllldr. ._41 thet ,1...t CoiIIiiiiln.. ver.
<br />an'anaed .10nl . .nov cl..r data 11r.41eat. In tha loraae, ea.bal oak Ii".. va,. to quakJ.ftI ..,.... then to ...h-
<br />alpine tlr (Abl.. l..iocarD_). and tiDAlly co .n..~ ap~a. .. the .now cl.ar daea ..tlada latar lnta
<br />the year. A-not[c.abla dlcllna In lora.e ulactoAl ot d.... .tel (P.ro.vacua ..aleulatue) .ad~ to a J....r
<br />.xtent, chip.un"a lu a .. .pp. an Cl'otu' .pp., . ot h.. .nowfa11 Th. ltaala r...on
<br />v.. I. ... ..
<br />,oph.1' (Tho~aya taIDoid..) or ~uat.tD toad auto bor.... Ilk (Cervu. canad.D8t.) ware "~t ..elud.d
<br />1'0. 1'1..10'0.' with _1'. than 70 ca of p.D.cr.bla .now depth. .... th.l.. ~r.vel v.. notlc..bIY"....erlct.d at
<br />dapth. ovar 40 c.. HaVUlaat of aile co hl.h.r .1..attODl iD . 1'1 eotaclded with the Inl CUtlon, ot. rowth tlf
<br />h.rb...ouo tanu rath.r' thAII directl with ~h. r.codl ._ liA. . . . v ". ".',Wlt.,-. wa 8
<br />pr....t. laat ttar t . t r. ..r.... . ar... .. 1'. ...... J,acol che~., .,C .I'ot. 0
<br />loll Iro.lon.. ncr.... I act.ol' 0 .. a 1'.' tot ~tll' .I'M 0; Nee _ll~.l.lt;<b ~,.t".. 44Icr..1IW
<br />In v.lataC ". cover .nun .n a . . area aVO _ .... t \II tal t, e.,-" ...
<br />re 100011 . Th. lon. t.na .11aOU. tr.nd .in.. 1930 bo. b... t_rd hl....r t_.r.tur.. ,.ndl... ,reelpitatl.n.
<br />~fth ahort t.~ fluetuatloa.. of . fau ya.r., fro. rallclvely dry co vat 8Od.., No el.nifteant tner....w in
<br />.llver conc.ntration vare d.tectad bac.u.. of ch. ...11 a.ounte added 1n cloud ...di. Ind t~ hi h back-
<br />ground level. of ailvar ln thl tar.ae ar.., No alatertau.. fact. 0 . ver 1 I. heVI b..n- OUftd at con-
<br />elneration. which coUld ba .xpact.d dua to clOUd .aadlnl.
<br />
<br />
<br />17. Key Yorde
<br />alpln~ tundr., alpen, climate, cloud .aeding. Colorado,
<br />ecoloRY. eco.y.t.~, elk, .nvironaeQtal "pact, fe.cue,
<br />foreat" seomorphology, oak, phenOlogy, phytoloclololY,
<br />productivity. S~n Juan Hountain., .llver iodide, ...11
<br />ft~amal., anow, .pr~c.. v.ath.r .odlf1caclon.
<br />19. S.culc.y Cloo.if. of thi. r.port 20. Securit, Cl...if.
<br />
<br />Uncla..lft-ad tlncb...Ulad
<br />
<br />18.
<br />
<br />Di.tributlon St_t...nt
<br />Availabl. Pr_:
<br />"atlonal T..hnic.l laforaatlon
<br />Sprlnsfl.ld, Vlr.lnia 22151
<br />
<br />a.rvlcd
<br />
<br />of thi. p... 21. No. of p.,..
<br />489
<br />
<br />22. 'd..
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