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Referenztyp Tagungsbeiträge
DOI / URL
Titel (primär) A simulation model for shrubland ecosystem dynamics in arid Karoo, South Africa
Titel (sekundär) Proceedings: Shrubland ecosystem dynamics in a changing environment; 1995 May 23-25; Las Cruces, NM
Autor Wiegand, T.; Milton, S.J.;
Herausgeber Barrow, J.R.; McArthur, E.D.; Sosebee, R.E.; Tausch, R.J.;
Journal / Serie General Technical Report (GTR)
Erscheinungsjahr 1996
Department OESA;
Band/Volume INT-GTR-338
Sprache englisch;
Abstract We present a spatially explicit model that simulates  shrubland dynamics over long timespans. The model, based on life  history attributes of five dominant shrub species, explores the effects of natural weather patterns and grazing on their competition,  survival, growth and abundance. Changing mean seed production  in the model altered the dynamic state from one where five  dominant species could coexist to states where some species became  rare or locally extinct. Simulating heavy grazing (low seed production  of palatable species), decreased overall plant densities but  increased the abundance of unpalatable shrubs. The time scales for  recovery were long compared with human lifespans. The probability  of substantial increases in carrying capacity of overgrazed rangeland  within 60 years was 7% with livestock withdrawal, and 64%  when resting was combined with partial bush clearing. 
ID 22470
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=22470
Wiegand, T., Milton, S.J. (1996):
A simulation model for shrubland ecosystem dynamics in arid Karoo, South Africa
In: Barrow, J.R., McArthur, E.D., Sosebee, R.E., Tausch, R.J. (eds.)
Proceedings: Shrubland ecosystem dynamics in a changing environment; 1995 May 23-25; Las Cruces, NM
General Technical Report (GTR) INT-GTR-338
U.S. Department of Agriculture, Forest Service, Intermountain Research Station, Ogden, UT, p. 135 - 142