Rangeland Ecology & Management

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Ungulate herbivory on buckbrush in an Arizona ponderosa pine forest
Author
Huffman, D. W.
Moore, M. M.
Publisher
Society for Range Management
Publication Year
2003-07-01
Body

Monitoring processes that affect plant population dynamics and determine community structure is central in forest restoration ecology. To study effects of mule deer (Odocoileus hemionus) and elk (Cervus elaphus) on buckbrush (Ceanothus fendleri Gray), we built exclosures around 90 plant-centered plots in 3 ponderosa pine (Pinus ponderosa Laws.) forest restoration management units and compared vegetative and flowering characteristics with unprotected plots for 2 years. On unprotected plots, 69% of the current-year branches were browsed during the first year and 44% were browsed the second year. There was no difference in number of aerial stems or current-year branches in the first year, yet stems on protected plots were longer (24.1 cm; P < 0.01) and retained more than 4 times the current-year biomass (1.4 g stem-1; P < 0.01) than those on unprotected plots (12.9 cm and 0.3 g stem-1, respectively). Stem number, length and diameter, number of current-year branches, and current-year biomass on protected plots were all greater (P < 0.01) than on unprotected plots in the second year. Stems on protected plots had significantly higher (P < 0.01) length-diameter ratios and had fewer current-year branches per unit length (P < 0.05) than unprotected stems. Flowering stems were found on significantly (P < 0.05) more protected plots (55%) than unprotected plots (8%) in the second year. Effects of ungulate herbivores on buckbrush size, stem recruitment, morphology, and flowering represent important constraints to early understory development and restoration in this Southwest ponderosa pine forest. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.2307/4004039
Additional Information
Huffman, D. W., & Moore, M. M. (2003). Ungulate herbivory on buckbrush in an Arizona ponderosa pine forest. Journal of Range Management, 56(4), 358-363.
IISN
0022-409X
OAI Identifier
oai:repository.arizona.edu:10150/643450
Journal Volume
56
Journal Number
4
Journal Pages
358-363
Journal Name
Journal of Range Management
Keywords
artificial regeneration
flowering
Cervus elaphus nelsoni
Ceanothus
Ceanothus fendleri
forest thinning
understory
plant morphology
Pinus ponderosa
branches
Odocoileus hemionus
biomass
browsing
Arizona
ecological restoration
Ceanothus fendleri
stem morphology
flower production
Cervus elaphus
Odocoileus hemionus