DOI: 10.1016/j.foreco.2016.10.029
Scopus记录号: 2-s2.0-84992530007
论文题名: Effects of environmental variables on seedling-sapling distribution of Qinghai spruce (Picea crassifolia) along altitudinal gradients
作者: Wang Q. ; Zhao C. ; Gao C. ; Xie H. ; Qiao Y. ; Gao Y. ; Yuan L. ; Wang W. ; Ge L. ; Zhang G.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 384 起始页码: 54
结束页码: 64
语种: 英语
英文关键词: Altitudinal gradient
; Environmental variables
; Moss
; Picea crassifolia
; Seedling-sapling distribution
Scopus关键词: Climate change
; Forestry
; Global warming
; Plants (botany)
; Environmental variables
; Laboratory experiments
; Moist conditions
; Moss
; Picea crassifolia
; Seedling development
; Seedling emergence
; Seedling-sapling distribution
; Population distribution
; air temperature
; altitude
; coniferous tree
; drought stress
; environmental effect
; environmental gradient
; moss
; population distribution
; sapling
; seedling emergence
; seedling establishment
; Bryophyta
; Picea crassifolia
英文摘要: Understanding the effects of environmental variables on seedling-sapling distributions can help gain insight into changes in population recruitment in the context of global warming. Six transects were used to survey the distribution of seedling-saplings and the variability in environmental variables along altitudinal gradients. In addition, laboratory experiments measuring the effects of moss on Picea crassifolia seedling emergence were conducted to identify seedling development characteristics of Picea crassifolia. The results show that the seedling-sapling distribution of Picea crassifolia is determined by altitudinal gradients over the large scale and is influenced by moss at the small scale. We found the largest number of seedling-saplings occurring at middle altitudes (3050–3250 m a.s.l.). The crucial abiotic factors in the seedling-sapling distribution for this species are precipitation at lower altitudes and temperature at higher altitudes. Moss mats can promote the recruitment of Picea crassifolia when the moss depth is less than 5 cm and moss cover is less than 50%. Conversely, with increasing moss depth and cover, the effects are shifted towards a negative relationship. Moss can promote moist conditions, implying that recruitment may be facilitated by moss in lower altitude areas where drought stress may occur. However, both air temperature in moss layers and soil temperature below moss are reduced, suggesting that the presence of moss may result in a shortened growing season for Picea crassifolia. More research into the seedling-sapling distribution of Picea crassifolia at both the large and small scales is necessary for artificial forestation and forest management, especially for those alpine plant species that are sensitive to climate change. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64566
Appears in Collections: 影响、适应和脆弱性
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作者单位: State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Sciences, Lanzhou University, Tianshui South Road 222, Lanzhou, China; State Key Laboratory of Grassland and Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Jiayuguan West Road 768, Lanzhou, China
Recommended Citation:
Wang Q.,Zhao C.,Gao C.,et al. Effects of environmental variables on seedling-sapling distribution of Qinghai spruce (Picea crassifolia) along altitudinal gradients[J]. Forest Ecology and Management,2017-01-01,384