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Drought and Grazing III: Root Dynamics and Germinable Seed Bank by A.L

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Drought and Grazing III: Root Dynamics and Germinable Seed Bank by A.L Published bimonthly—January, March, May, July, 279 Canadian bluejoint response to heavy grazing by William B. Collins, Earl F. September, November Becker, and Alison B. Collins Copyright 2001 by the Society for Range Plant Ecology Management 284 Restoring degraded riparian meadows: Biomass and species responses by David INDIVIDUAL SUBSCRIPTION is by membership in the Society for Range Management. W. Martin and Jeanne C. Chambers LIBRARY or other INSTITUTIONAL SUBSCRIP- 292 Drought and grazing III: Root dynamics and germinable seed bank by A.L. TIONS on a calendar year basis are $95.00 for the Hild, M.G. Karl, M.R. Haferkamp, and R.K. Heitschmidt United States postpaid and $112.00 for other coun- tries, postpaid. Payment from outside the United 299 Forage kochia seed germination response to storage time and temperature by States should be remitted in US dollars by interna- Stanley G. Kitchen and Stephen B. Monsen tional money order or draft on a New York bank. Reclamation BUSINESS CORRESPONDENCE, concerning subscriptions, advertising, reprints, back issues, and 307 Species composition on reclaimed ski runs compared with unseeded areas by related matters, should be addressed to the Ron J. Van Ommeren Managing Editor, 445 Union Blvd., Suite 230, Lakewood, Colorado 80228. Book Reviews EDITORIAL CORRESPONDENCE, concerning manuscripts or other editorial matters, should be 312 Warming the World: Economic Models of Global Warming by William D. addressed to the Editor, Gary Frasier, 7820 Stag Nordhaus and Joseph Boyer; Tropical Forage Plants: Development and Use, edit- Hollow Road, Loveland, Colorado 80538. Page ed by Antonio Sotomayor-Rio and W.D. Pitman. proofs should be returned to the Production Editor, 3059A Hwy 92, Hotchkiss, CO 81419-9548.. INSTRUCTIONS FOR AUTHORS appear on the inside back cover of most issues. THE JOURNAL OF RANGE MANAGEMENT (ISSN 0022-409X) is published bimonthly for $56.00 per year by the Society for Range Management, 445 Union Blvd., Ste 230, Lakewood, Colorado 80228. SECOND CLASS POSTAGE paid at Denver, Colorado and additional offices. POSTMASTER: Return entire journal with address change—Address Service Requested to Society for Range Management, 445 Union Blvd., Suite 230, Lakewood, Colorado 80228. PRINTED IN USA Acting Managing Editor Associate Editors ELAINE E. GRINGS MICHAEL H. RALPHS JEFF BURWELL YUGUANG BAI USDA-ARS USDA-ARS 445 Union Blvd., Ste 230 Dept. Plant Sciences Fort Keogh-LARRL Poisonous Plant Lab Lakewood, Colorado 80228 University of Saskatchewan Route 1, Box 2021 1150 E 1400 N (303) 986-3309 51 Campus Drive Miles City, Montana 59301 Logan, Utah 84341-2881 Fax: (303) 986-3892 Saskatoon, Saskatchewan e-mail address: S7N 5A8 MARSHALL HAFERKAMP CAROLYN HULL SIEG [email protected] CANADA USDA-ARS S.W. Science Complex Editor/Copy Editor Fort Keogh-LARRL 2500 South Pine Knoll GARY FRASIER/JO FRASIER ROBERT R. BLANK Route 1, Box 2021 Flagstaff, Arizona 86001 7820 Stag Hollow Road USDA-ARS Miles City, Montana 59301 Loveland, Colorado 80538 920 Valley Road FAISAL K. TAHA e-mail address: Reno, Nevada 89512 BILL OCUMPAUGH Director of Technical Programs [email protected] Texas A&M Research Biosaline Agriculture Center Production Editor KLAAS BROERSMA 3507 Hwy 57E P.O. Box 14660 PATTY RICH Agriculture and Agri-Food Canada Beeville, Texas 78102 Dubai, U.A.E. Society for Range Management 3015 Ord Rd. 3059A Hwy 92 Kamloops, British Columbia MITCHEL McCLARAN ALLEN TORELL Hotchkiss, Colorado 81419-9548 V2B 8A9 CANADA University of Arizona New Mexico State University e-mail address: 301 Biological Science East Agricultural Economics [email protected] JOE E. BRUMMER Tucson, Arizona 85721-0001 Box 3169 Book Review Editor Mt. Meadows Res. Ctr. Las Cruces, New Mexico 88003 DAVID L. SCARNECCHIA P.O. Box 598 PAUL OHLENBUSCH Dept of Natural Res. Sci. Gunnison, Colorado 81230 Kansas State University MIMI WILLIAMS Washington State University Department of Agronomy USDA-ARS Pullman, Washington 99164-6410 DAVID GANSKOPP Throckmorton Hall 22271 Chinsegut Hill Rd e-mail address: USDA-ARS Manhattan, Kansas 66506 Brooksville, Florida 34601-4672 [email protected] HC-71 4.51 HWY 205 Electronic JRM Editor Burns, Oregon 97720 ROBERT PEARCE M. KEITH OWENS Resources Concept Texas A&M University ROBERT GILLEN 340 N. Minnesota St. Research Center USDA-ARS Carson City, Nevada 89703 1619 Garner Field Road Southern Plains Range Res. Sta. Ulvade, Texas 2000 18th Street e-mail address: Woodward, Oklahoma 73801 [email protected] THE SOCIETY FOR RANGE MANAGEMENT, founded in 1948 as the American Society of Range Management, is a nonprofit association incorporated under the laws of the State of Wyoming. It is recognized exempt from Federal income tax, as a scientific and educa- tional organization, under the provisions of Section 501(c)(3) of the Internal Revenue Code, and also is classed as a public foundation as described in Section 509(a)(2) of the Code. The name of the President Society was changed in 1971 by amendment of the Articles of Incorporation. JAMES T. O’ROURKE The objectives for which the corporation is established are: Chadron State College 61 Country Club Road —to properly take care of the basic rangeland resources of soil, plants, and water; Chadron, Nebraska 69337 1st Vice-President —to develop an understanding of range ecosystems and of the principles applicable to the RODNEY K. HEITSCHMIDT management of range resources; USDA-ARS Ft. Keogh LARRL —to assist all who work with range resources to keep abreast of new findings and Rt 1, Box 2021 techniques in the science and art of range management; Miles City, Montana 59301-9801 —to improve the effectiveness of range management to obtain from range resources the 2nd Vice-President products and values necessary for man’s welfare; BOB BUDD Red Canyon Ranch —to create a public appreciation of the economic and social benefits to be obtained from 350 Red Canyon Rd the range environment; Lander, Wyoming 82520-9417 Acting Executive Vice-President —to promote professional development of its members. JEFF BURWELL 445 Union Blvd. Suite 230 Membership in the Society for Range Management is open to anyone engaged in or interested in Lakewood, Colorado 80228-1259 any aspect of the study, management, or use of rangelands. Please contact the Executive Vice- (303) 986-3309 President for details. Fax: (303) 986-3892 e-mail address: [email protected] Directors 1999-2001 JAMES LINEBAUGH The Journal of Range Management is a publication of the Society for Range 3 Yhvona Dr. Management. It serves as a forum for the presentation and discussion of facts, ideas, and philosophies Carson City, NV 89706-7717 pertaining to the study, management, and use of rangelands and their several resources. Accordingly, all GLEN SECRIST material published herein is signed and reflects the individual views of the authors and is not necessari- Idaho Dept. of Agriculture ly an official position of the Society. Manuscripts from anyone—nonmembers as well as members—are 3818 S. Varian Ave. welcome and will be given every consideration by the editors. Editorial comments by an individual are Boise, Idaho 83709-4703 also welcome and, subject to acceptance by the editor, will be published as a “Viewpoint.” 2000–2002 RICHARD H. Hart In Cooperation With: Some of the articles appearing in The Journal of Range Management (JRM) USDA-ARS are presented in cooperation with The American Forage and Grassland Council (AFGC). This coopera- High Plains Grasslands Station 8408 Hildreth Rd. tion consists of JRM acceptance of professional papers in forage grazing management and related sub- Cheyenne, Wyoming 82009-8809 ject areas from AFGC members and the appointment of 2 AFGC affiliated associate editors to JRM’s DON KIRBY Editorial Staff. The American Forage and Grassland Council Offices: P.O. Box 94, Georgetown, Texas North Dakota State University 78627; Larry Jeffries, President; Dana Tucker, Executive Secretary. Animal & Range Science Fargo, North Dakota 58105 2001–2003 JOHN TANAKA Eastern Oregon Agriculture Research Contribution Policy: The Society for Range Management may accept donations of real Center-Union and/or personal property subject to limitations set forth by State and Federal law. All donations shall be P.O. Box E subject to management by the Executive Vice President as directed by the Board of Directors and their Union, Oregon 97883 discretion in establishing and maintaining trusts, memorials, scholarships, or other types of funds. GREG TEGART Individual endowments for designated purposes can be established according to Society policies. Gifts, BCMAFF bequests, legacies, devises, or donations not intended for establishing designated endowments will be 1690 Powick Rd, Suite 2000 deposited into the SRM Endowment Fund. Donations or requests for further information on Society Kelowna, BC V1X 7G5 CANADA policies can be directed to the Society for Range Management, Executive Vice-President, 445 Union Blvd., Suite 230, Lakewood, Colo. 80228-1259. We recommend that donors consult Tax Advisors in The term of office of all elected officers and directors begins in February of each regard to any tax consideration that may result from any donation. year during the Society’s Annual Meeting. JOURNAL OF RANGE MANAGEMENT 54(3), May 2001 209 J. Range Manage. 54: 210–217 May 2001 Application of non-equilibrium ecology to rangeland ripari- an zones TAMZEN K. STRINGHAM, WILLIAM C. KRUEGER, AND DAVID R. THOMAS Authors are research associate and professor, Department of Rangeland Resources, and professor, Department of Statistics, Oregon State University, Corvallis, Ore. 97331. Abstract Resumen Traditional theories of plant succession leading to a single Las teorías tradicionales de sucesión vegetal que conducen a equilibrium community are being re-evaluated. Alternative theo- una sola comunidad en equilibrio están siendo revaluadas. Para ries involving multiple steady states, and state-and-transition reflejar mas adecuadamente las dinámicas de los ecosistemas de processes have been postulated to more adequately reflect the pastizal se han postulado teorías alternativas que involucran dynamics of rangeland ecosystems.
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