Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.11.019 |
Quaking aspen woodland after conifer control: Tree and shrub dynamics | |
Bates, Jonathan D.; Davies, Kirk W. | |
2018-02-01 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT |
ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2018 |
卷号 | 409页码:233-240 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Western juniper (Juniperus occidentalis spp. occidentalis Hook.) woodlands are replacing many lower elevation (< 2100 m) quaking aspen (Populus tremuloides Michx.) stands in the northern Great Basin. We evaluated two juniper removal treatments (Fall, Spring) to restore aspen woodlands in southeast Oregon, spanning a 15-year period. The Fall treatment involved cutting 1/3 of the juniper followed by a high severity broadcast burn one year later in October 2001. The Spring treatment involved cutting 2/3 of the juniper followed by a low severity broadcast burn 18 months later in April 2002. The cut trees increased the amount of dry fuels to carry fire through stands. We tested the effectiveness of treatments at removing juniper from seedlings to mature trees, assessed aspen ramet recruitment and development, and evaluated recovery of the shrub layer. In the Fall treatment, burning eliminated all remaining juniper trees and saplings, stimulated an 8-fold increase in aspen density (16,000 ha(-1)) and increased aspen cover 6-fold compared to the untreated controls. After 15 years, aspen density in the Spring treatment was about 1/3 of the Fall treatment, however, aspen cover did not differ from the Fall treatment. Because spring burning was less effective at removing juniper, leaving about 20% of the mature trees and 50% of the saplings, retreatment of conifers will be necessary to maintain the aspen community. In the Fall treatment, juniper began establishing within 15 years after conifer control indicating re treatment might be necessary earlier than expected. Total shrub cover and density in the Spring treatment was greater than the control and Fall treatments. Cover and density of sprouting shrub species, particularly western snowberry (Symphoricarpus oreophilus Gray), increased and were greater in the Spring treatments than the Fall treatment where they had declined. Shrubs that increased in the Fall treatment were species where seed germination is enhanced by fire, especially snowbrush (Cermothus velutinus Douglas ex Hook) and wax currant (Ribes cereum Dougl.). If an objective is to maintain or increase native understories the Spring treatment was more effective than the Fall treatment for recovering the shrub layer. |
英文关键词 | Prescribed fire Fire severity Pinon-juniper Western juniper Western snowberry |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425578000023 |
WOS关键词 | COMMUNITIES FOLLOWING FIRE ; WESTERN NORTH-AMERICA ; POPULUS-TREMULOIDES ; PRESCRIBED FIRE ; VEGETATION RECOVERY ; UNGULATE HERBIVORY ; SAGEBRUSH STEPPE ; EARLY SUCCESSION ; GREAT-BASIN ; JUNIPER |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24269 |
专题 | 气候变化 |
作者单位 | USDA ARS, Burns, OR USA |
推荐引用方式 GB/T 7714 | Bates, Jonathan D.,Davies, Kirk W.. Quaking aspen woodland after conifer control: Tree and shrub dynamics[J]. FOREST ECOLOGY AND MANAGEMENT,2018,409:233-240. |
APA | Bates, Jonathan D.,&Davies, Kirk W..(2018).Quaking aspen woodland after conifer control: Tree and shrub dynamics.FOREST ECOLOGY AND MANAGEMENT,409,233-240. |
MLA | Bates, Jonathan D.,et al."Quaking aspen woodland after conifer control: Tree and shrub dynamics".FOREST ECOLOGY AND MANAGEMENT 409(2018):233-240. |
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