Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2019.02.003 |
Relationships between tree survival, stand structure and age in trembling aspen dominated stands | |
Kweon, Deogkyu; Comeau, Philip G. | |
2019-04-15 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2019 |
卷号 | 438页码:114-122 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Canopy openings resulting from tree death provide opportunities for shade intolerant species such as aspen to establish and grow in the understory leading to development of aspen stands with multiple canopy layers and multiple cohorts. Stand structure is likely to influence survival probability since it will lead to differences in competition intensity and in resource utilization. We examined relationships among stand age (years after stand establishment), age structure (age diversity), and tree size diversity (i.e., diversity of diameter classes), using cores collected from 531 aspen trees in 18 stands distributed across the province of Alberta, Canada. Results show positive relationships between stand age, age diversity, and tree size diversity. Logistic mixed effects survival probability models were developed using data from 199 remeasured permanent sample plots. Results show an inverted U-shaped relationship between survival probability and tree diameter. Survival probability trends varied between young (<= 60), mature (> 60 and <= 100), and old (> 100) age groups in relation to differences in competition intensity and stand structure. Intraspecific competition (deciduous basal area larger) was negatively related to tree survival and the magnitude of the negative impact was stronger in the young age group. Negative effects of structural diversity (tree size diversity) on survival probability were strongest in the mature age group. We suggest that effects of tree size diversity relate to environmental stresses and competition at the stand level while the influence of deciduous basal area larger serves as a measure of competition experienced by individual trees. The significance of mean annual temperature in our models indicates that, under warmer conditions, competition variables (e.g., deciduous basal area larger and tree size diversity) had stronger effects on tree mortality with the magnitude of effects varying between age groups. |
英文关键词 | Trembling aspen (Populus tremuloides Michx.) Survival probability Tree core analysis Stand structure (Tree size diversity) Tree size (DBH) Intraspecific competition Climate |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000463120500014 |
WOS关键词 | POPULUS-TREMULOIDES MORTALITY ; WHITE SPRUCE ; SIZE DIVERSITY ; CLIMATE-CHANGE ; QUAKING ASPEN ; DYNAMICS ; MODEL ; PRODUCTIVITY ; DECLINE ; COMPETITION |
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/182318 |
专题 | 气候变化 |
作者单位 | Univ Alberta, Dept Renewable Resources, 751 Gen Serv Bldg, Edmonton, AB T6G 2H1, Canada |
推荐引用方式 GB/T 7714 | Kweon, Deogkyu,Comeau, Philip G.. Relationships between tree survival, stand structure and age in trembling aspen dominated stands[J]. FOREST ECOLOGY AND MANAGEMENT,2019,438:114-122. |
APA | Kweon, Deogkyu,&Comeau, Philip G..(2019).Relationships between tree survival, stand structure and age in trembling aspen dominated stands.FOREST ECOLOGY AND MANAGEMENT,438,114-122. |
MLA | Kweon, Deogkyu,et al."Relationships between tree survival, stand structure and age in trembling aspen dominated stands".FOREST ECOLOGY AND MANAGEMENT 438(2019):114-122. |
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