The Ecology of Pieris Floribunda Benth. and Hook., an Ericad, in a Pine-Heath Community in the Great Smoky Mountains
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University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Masters Theses Graduate School 3-1968 The Ecology of Pieris floribunda Benth. and Hook., an Ericad, in a Pine-Heath Community in the Great Smoky Mountains Caroline Triplett Wingfield University of Tennessee - Knoxville Follow this and additional works at: https://trace.tennessee.edu/utk_gradthes Part of the Botany Commons Recommended Citation Wingfield, Caroline Triplett, "The Ecology of Pieris floribunda Benth. and Hook., an Ericad, in a Pine-Heath Community in the Great Smoky Mountains. " Master's Thesis, University of Tennessee, 1968. https://trace.tennessee.edu/utk_gradthes/3208 This Thesis is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Masters Theses by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a thesis written by Caroline Triplett Wingfield entitled "The cologyE of Pieris floribunda Benth. and Hook., an Ericad, in a Pine-Heath Community in the Great Smoky Mountains." I have examined the final electronic copy of this thesis for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Master of Science, with a major in Botany. Edward E.C. Clebsch, Major Professor We have read this thesis and recommend its acceptance: H.R. DeSelm, James D. Caponetti Accepted for the Council: Carolyn R. Hodges Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) Decembe r 15, 1967 To the Graduate Council : I am submitting he re with a thesis writte n by Caro l ine Triple tt Wingf ie ld entitled .,The Eco logy of Pieris floribunda Benth. and Hook. , an Ericad, . in a Pine -He ath Community in the Gre at Smoky Mountains. " I recomme nd that it be acce pted for eighteen quar te r ho urs of credit in pa rtial fulfillme nt of the requirements for the de gre e of Maste r of Science , with a ma jor in Botany . fkYML f(!_ �dJ Ma jor Profe ssor We have re ad this thesis and recommend its acce ptance : Acce pted for the Counci l: � £�--zt V1ce Pres1dent for Graduate Studies and Re search THE . EC OIDGY OF PIERIS FLORIBUNDA BENTH. AND HOOK. , AN ERIC AD, IN A PINE-HEATH COMMUNITY IN THE GREAT SMOKY MOUNTAINS A Thesis Pre se nte d to the Gra dua te Council of The Unive rsity of Te nnessee In Partial Fulfillme nt of the Re quireme nts for the De gre e Ma ste r of Sc ie nce by Caroline Triple tt Wingfie ld Ma rch 1968 AC KNOWLEDGEMENTS The author wis hes to expre ss si nce re appreciation to the othe r gra duate stude nts in the Bota ny De partme nt for the ir advice and criti cism of the the sis and for the ir ass is ta nce in completing the fie ld work. Special tha nks are exte nded to my fa the r, Dr. Harve y N. Wingfie ld, Jr. and Mr. M. D. Ke rby, Jr. for the chemical analys is of the soil sample s. For identification of the lichens in the study area, the author wishes to thank Mr. !s ao Yos himura . The author is grateful to he r ma j or professor, Dr. Edwa rd E. C. Clebsch, and also to Dr. H. R. DeSe lm and Dr. Jame s D. Capone tti for the ir cri ticism of the thesis. The he lp extende d to the author by the sta ff of the Great Smoky Mounta ins Nationa l Pa rk is greatly appreciated. Tra ve l ne ce ssary for this study wa s partia lly supporte d through contra ct No. 14-10-0117-634 be tween the Na tiona l Pa rk Se rvice and The Unive rs ity of Te nnessee . This assistance is gratefully acknowle dge d. ii 769367 TAB IE OF CON'IENTS SECTION PAGE I. INTRODUCTION. 1 Objectives. 1 The Study Area. 1 Vege tationa l Studies. 9 II . METHODS • • 15 III . RES ULTS 19 Frequency of Trees .. 19 Density and Basal Are a of Trees . 21 Fre quency and Density of Shrubs . 25 Herbace ous Cove r .. 25 Pie ri s floribunda 27 Envi ronme ntal Study . 29 IV. DISCUSSION AND CONCLUSIONS. 43 V. SUMMARY •. 48 LITERATURE CITED . 50 54 APPENDIXES. • . A. PROCEDURE FOR THE PREPARATION OF SOIL SAMPlES . 55 57 B . SUMMARY OF TREE TAXA IN DIAMETER ClASSES BY PI.DT. • . 65 c. SUMMARY OF SHRUB TAXA IN DIAMETER ClASSES BY PI.DT • iii US T OF TAB lES TABlE PAGE I . Pe r Cent Freque ncy of Tree Species in the Tree Stra tum, Unde r One Inch Diamete r and As Seedlings ..... 20 II . Me an De nsity Pe r Plot and Pe r Cent To ta l Basal Are a of Trees in the Study Are a 22 III . Species Pre sent and The ir Frequency in the He rbaceous Cove r . 26 IV. The Me an, Stand ard De viation and Range of Several Cha racte rs of Pie ris floribunda . .... 28 V. Va lue s of Compone nt s of Re gre ss ion Equations of Tempe rature s. 37 VI . Soil Prof iles and pH Va lue s from the Bullhe ad Tra il Pine - He ath and a Pine -He ath at 2800 Feet Elevation Studied by McGinnis 40 VI I . Ava ilab le Cations of Soils in the Study Area. 41 iv US T OF FIGURES FIGURE PAGE 1. Re product ive Structure s .of Pieris floribund a, Benth . and Hook . (a) Flowe r, X5; (b) Capsule, X4; (c) Seed, lOX (from Wood, C. E. , 1961) . 4 2. World Distribut ion of the Genus Pie ris (from Li, Hi-Lin, 1952) . 5 3. Pieris floribunda Growing Along Blue Ridge Pa rkway Ne ar Mt . Pisgah, North Carolina (S pring, 1967) . 7 4. Bu l lhe ad Trail in Study Are a (Fall, 1966) . 10 5. Ae ria l Photograph of Bullhe ad Trail in the Vicinity of the Study Are a 16 6. A Comparison of Diame te r Distribut ion of All Stems in Two Pine -He ath Stands : the Study Area and a Stand Inve st i- gated by Whit taker (1956) ..... 23 7. (a) Pinus pungens in Pine -He ath Community Studied by Whittaker .(1956) . (b) � · punge ns in Study Are a ...• ........ 24 8. Ave rage Max imum Tempe rature s for Five Stations in Study Are a for the One Foot Leve 1, Litte r, and Soil . 30 9. Ave rage Minimum Tempe rature s for Five Stations in Study Are a for the One Foot Leve1, Litte r, and Soil 31 10 . Comparison of Ave rage Max imum Tempera ture s for Th ree Areas in Gre at Smoky Mounta ins Nat iona l Park : Park He adquarte rs, Study Are a, and Ne wf ound Gap . 33 v vi FIGURE PAGE 11 . Comparison of Ave rage Minimum Te mperature s for Three Are as in Great Smoky Mount ains Nat iona l Pa rk: Pa rk He ad- quarte rs, Study Area , and Ne wf ound Gap . 12 . Re lation of Ne wfound Gap and Study Are a Maximum (a) and Minimum (b) Te mperature s . 35 13 . Re la tion of Park He adquarters and Study Are a Max imum (a) and Minimum (b) Te mpera ture s 3 6 14 . A Comparison of the Cumu lative Rainfall for Three Location s in Gre at Smoky Mounta ins Nationa l Pa rk: Ne wfound Gap , Study Area, and Pa rk He adqua rte rs .... 39 I . INTRODUCTION Objective s A membe r of the he ath family , Ericaceae , Pieris floribunda Benth . and Hook. is endemic to the Southe rn Appa lachian Mountains, its distribution be ing concentrated in the highe r elevations of the Great Smoky Mount ains Na t iona l Park. For ma ny ye ars these sma ll shrubs have be en noted grow ing bes ide the trails in the Pa rk in some of the most xe ric hab itats , especia lly pine -he ath communities , along with othe r ericaceous plants . By close examination of the clima tology, soils and associated ve ge tation of the se habit ats, it was hoped tha t some clues might be found as to what factors allow �- floribunda to survive a�d re produce in the se xe ric habitats . Through inve stigat ion of the above and. ce rtain aspects of the aute cology of Pieris, the ve geta tiona l role of this he ath shrub in this particular community might be clarified . The Study Area The Gre at Smoky Mount ains of we stern North Carolina and eastern Te nne ssee are an area of gre at environmenta l and ve ge tationa l divers ity . Mt . LeC on te , with a pe ak elevation of 6593 feet, is one of the highe st mounta ins in the. re gion . Located on it s wes tern slope is the Bu llhead, the site of this study. Whittaker (1956) de scribe s fifteen ve ge tation types as be ing pre sent in the Great Smoky Mount ains Nat iona l Park. The ma jority of 1 2 the se would be encounte red on asce nding Mt.