TABLE of CONTENTS: Vol. 45, No. 4, July 1992
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Journal of Range Management, Volume 45, Number 4 (July 1992) Item Type Journal; text Publisher Society for Range Management Journal Journal of Range Management Rights Copyright © Society for Range Management. Download date 10/10/2021 20:10:48 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/650535 TABLE OF CONTENTS: Vol. 45, No. 4, July 1992 ARTICLES Ecology 322 Viewpoint: A view on spsdea additions end deletions end the baience of nature by Hyrum B. Johnson and Herman S. Mayeux 334 Honey meequite trenepiration elong e vertical site gradient by C.J. Cuomo, R.J. Ansley, P.W. Jacoby, and R.E. Sosebee 339 Seasonal trends in leaf area of honey mesquite trees Determination ueing image enelysis by R.J. Ansley, D.L. Price, S.L. Dowhower, and D.H. Carbon 345 Value of mountein rye for ruppreseion of umuel bromegraeeea on semi- erid mined lends by Myron R. Andersen, Edward J. DePuit, Rollin H. Abemethy, and Larry H. Kleinman 352 Some effecte of a white grub infest&ion on northern mixed-greee prairie by Charles L. Lura and Paul E. Nyren 355 Mortality of created wheatgrass end Ruesho wildrye during drought by M.R. Haferkamp, P.O. Currie, J.D. Volesky, and B.W. Knapp Plant Physiology 358 Gekineion of bur buttercup seeds by James A. Young, Ellen Martens, and Neil E. West 363 Effects of defoliation, elmding end competition on spotted knepweed end bluebunch wbeatgreee by Gregory A. Kennett, John R. Lacey, Curtis A. Butt, Kathrin M. Olson-Rutx, and Marshall R. Haferkamp 369 Seeeonel trends in herbage yield end quality of Agropyronr by H.F. Mayland, K.H. Asay, and D.H. Clark 374 Selenium absorption by two-grooved milkve&.l~and western wheatgrass from eelenometbionine, eelenocyetine, end eelenite by M. Cobum Willi- ams and H.F. Mayland 379 Effect of timing end inteneity offht defolietion oh subsequent production of 4 peeture species by A.J. Leyshon and C.A. Campbell Animal Ecology 385 Hebitet eelection by cettle elong en ephemeral channel by Michael A. Smith, J. Daniel Rodgers, Jerrold L. Dodd, and Quentin D. Skinner Pkznt-AnimalInteraction 391 Declining fonge eveilebility effects on utilization and community eelec- tlon by cattle by Michael A. Smith, J. Daniel Rodgers, Jerrold L. Dodd, and Quentin D. Skinner Published bimonthly-January, March, May, July, September, November 396 Avian community response to fire and mechanical shrub control in south Florida by Susan M. Fitzgerald and George W. Tanner Copyright 1992 by the Society for Range Management 401 Response of cattle to cured reproductive stems in a caespitose grass by INDIVIDUAL SUBSCRIPTION is by membership in David Ganskopp, Ray Angell, and Jeff Rose the Society for Range Management, 405 Influence of leafy spurge on forage utilization by cattle by David G. Hein LIBRARY or other INSTITUTIONAL SUBSCRIP- and Stephen D. Miller TIONS on a calendar year basis are $56.00 for the United States postpaid and $66.00 for other coun- 407 Herbicide effects on cross timbers breeding birds by Cynthia A. Schulz, tries, postpaid. Payment from outside the United David M. Leslie Jr., Robert L. Lochmiller, and David M. Engle States should be remitted in US dollars by interna- tional money order or draft on a New York bank. BUSINESS CORRESPONDENCE, concerning sub- Measurement scriptions, advertising, reprints, back issues, and 411 Time domain reflectometry for measuring soil water content in range related matters, should be addressed to the Manag- ing Editor, 1639 York Street, Denver, Colorado surveys by Tim L. Reeves and Michael A. Smith 60206, (303)355-7070. EDITORIALCORRESPONDENCE. concerning manu- scriptsorotheraditorial matters,should beaddressed BOOK REVIEWS to the Editor, Gary Frasier, 1300 Wheatridge Ct., 414 Advances in Range Management in Arid Lands edited by Riad Halwagy, Loveland, Colorado 60537. Page proofs should be Faisal K. Taha, and Samira A. Omar. returned to the Production Editor, 1639 York Street, Denver, Colorado 60206. INSTRUCTIONS FOR AUTHORS appear on the inside back cover of most issues. A Style Manual is also available from the Society for Range Manage- ment at the above address @$4.00 for single copies. THE JOURNAL OF RANGE MANAGEMENT (ISSN 0022-409X) is published six times yearly for $56.00 per year by the Society for Range Management, 1639 York Street, Denver, Colorado 60206 and addi- tional offices. SECONDClASS POSTAGE paid at Denver, Colorado. POSTMASTER: Return entlre journal with address change-RETURN POSTAGE GUARANTEED-to Society for Range Management, 1639 York Street, Denver, Colorado 60206. Interim Managlng Edltor ASSOCIATE EDITORS R.M. (Ray) Housley DONALD BEDUNAH G. FRED GIFFORD KIRK MCDANIEL 1639 York Street School of Forestry Range, Wildlife 8 Forestry Dept. of Animal & Range Sr$ience Denver, Colorado 60206 University of Montana 1000 Valley Road Box 31 Missoula, Montana 59612 University of Nevada New Mexico State University Editor Reno, Nevada 69512 LSS Cruces, New Mexico 88003-0003 GARY FRASIER JOHN A. CRAWFORD 1300 Wheatridge Ct. Dept. of Fisheries and Wildlife KRIS HAVSTAD RICHARD F. MILLER Loveland, Colorado 60537 Nash 104 USDA-ARS, Dept. 3JER Squaw Butte Exp. Sta. Oregon State University Box 3003, NMSU Highway 205 Productlon Edltor DAVID ENGLE Las Cruces, New Mexico 66003 Burns, Oregon 97720 PATRICIA G. SMITH Agronomy Department Society for Range Management JERRY HOLECHEK Oklahoma State University JAMES A. PFISTER 1639 York Street Stillwater, Oklahoma 74076 Animal 8 Range Science USDA Agriculture Research Service Denver. Colorado 60206 Dept. 3-l Box 30003 1150 East 1400 North (303) 3557070 TIMOTHY E. FULBRIGHT New Mexico State University Logan, Utah 84321 College of Agriculture Las Cruces, New Mexico 66003-0003 Book Review Edltor Texas A&l DAVID M. SWIFT DAVID L. SCARNECCHIA POB 156, Sta. 1 HERMAN S. MAYEUX, JR. Natural Resources Ecology Department of Natural Resource Sciences Kingsville Texas 76363 USDA-ARS Colorado State University Washington State University 808 E. Blackland Road Ft. Collins, Colorado 80523 Pullman, Washington 991646410 Temple, Texas 76502 J. Range Manage. 45322-333, July 1992 Viewpoint: A view on species additions and deletions and the balance of nature HYRUM B. JOHNSON AND HERMAN S. MAYEUX Authors are ecolonist and range scientist, USDA, Agricultural Research Service, 808 Eart Blackland Rd., Temple, Tex. 74502. - Abstract Vegetation forms the matrix of terrestrial ecosystems. Changes in the physiognomic structure and/ or species composition of vege- Popular assumptions about ecosystem stability and the delicate balance of nature are found lacking when examined in terms of tation provide immediate evidence of ecosystem change. Such paleoecological, historical and current biochronological, and bio- changes can be framed in the general ecosystem concepts of stabil- ity, diversity, and productivity. Our attention will be directed geographical sequences in a wide variety of environments. Species toward stability, which has several conceptual components and in composition of vegetation varies continuously in time as well as theory is often linked closely with diversity and productivity. Eco- space in the absence of acute perturbations. Species have been system stability has at least 2 principal aspects: that related to the added to or removed from ecosystems without greatly affecting toughness of the system, i.e., how much force is required to change ecosystem function. Natural ecosystems exhibit greater stability its structure and/ or function, and that related to the dynamics of (inertia) in physiognomic structure and functional processes than change after an alteration has occurred. Westman (1978) discusses in species composition. For instance, creosotebush became domi- nant over many millions of hectares of the Chihuahuan, Sonoran, the first in terms of inertia and the second under the heading resilience, which he separates into elasticity, amplitude, hysteresis, and Mojave Deserts over a short period of 11,000 years, but a limited number of generations precludes establishment of highly and malleability. The usual perception of inertial stability is in terms of stable integrated and biologically regulated communities by co-evolution. species composition, which constitutes, a self-sustaining system Dramatic shifts in species composition of eastern deciduous forests of North America occurred in prehistory and continue into the according to the “balance of nature” paradigm. We propose a present. Similar changes are noted in the constant assembling and second, or alternative, view of a self-sustaining system in terms of reassembling of species in the purportedly ancient and stable physiognomic structure and functional processes in which various forests of the tropics. Numerous introductions with few extinctions species with similar physiognomy and function are interchange- in the flora of California have increased species richness and prob- able. Such a system may have high inertial stability even with the ably diversity, and many recent additions are primary contributors coming and going of species. As for the resilience of altered ecosys- to ecosystem productivity. Recognition that rangeland ecosystems tems, elasticity (the capacity for recovery) and malleability (the persist in unstable rather than stable species compositions provides capacity for establishing a new structural or functional balance) both a challenge and an opportunity for natural resource manage- are perhaps the most significant aspects of the concept in relation ment. The challenge is to develop