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Titolo:
Aspen persistence near the National Elk Refuge and Gros Ventre Valley elk feedgrounds of Wyoming, USA
Autore:
Barnett, DT; Stohlgren, TJ;
Indirizzi:
Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA Colorado State Univ Ft Collins CO USA 80523 Lab, Ft Collins, CO 80523 USA
Titolo Testata:
LANDSCAPE ECOLOGY
fascicolo: 6, volume: 16, anno: 2001,
pagine: 569 - 580
SICI:
0921-2973(200108)16:6<569:APNTNE>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANT DIVERSITY; PARK; REGENERATION; RANGE; SIZE; FIRE;
Keywords:
aspen regeneration; Cervus elaphus; elk; herbivory; landscape-scale surveys; Populus tremuloides;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Barnett, DT Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA Colorado State Univ Ft Collins CO USA 80523 ins, CO 80523 USA
Citazione:
D.T. Barnett e T.J. Stohlgren, "Aspen persistence near the National Elk Refuge and Gros Ventre Valley elk feedgrounds of Wyoming, USA", LANDSC ECOL, 16(6), 2001, pp. 569-580

Abstract

We investigated aspen (Populus tremuloides) regeneration in the Gros Ventre River Valley, the National Elk Refuge and a small part of Grand Teton National Park, Wyoming. USA to see if elk (Cervus elaphus) browsing was as damaging as previously thought. We conducted a landscape-scale survey to assess aspen regeneration across gradients of wintering elk concentrations using68 randomly selected aspen stands in the 1090 km(2) study area. Forty-fourpercent of the stands sampled supported some newer regeneration that had reached the canopy. There were no significant differences of regeneration across elk winter range classification (p = 0.25) or distance from feed-rounds p = 0.96). However, a multiple linear regression found that the concentration of elk was one of several important predictors of successful aspen regeneration (p = 0.005, R-2 = 0.36). Our results suggest that stand-replacingregeneration occurs across the landscape at a variety of elk densities despite some trends of reduced regeneration under greater elk concentrations. We propose that high spatial and temporal variation and scattered patches of successful aspen regeneration characterize aspen persistence between periods of episodic regeneration and recruitment.

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Documento generato il 26/09/20 alle ore 09:28:28