DOI: 10.1016/j.foreco.2017.08.008
Scopus记录号: 2-s2.0-85028601560
论文题名: Populus tremuloides seedling establishment: An underexplored vector for forest type conversion after multiple disturbances
作者: Gill N.S. ; Sangermano F. ; Buma B. ; Kulakowski D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 404 起始页码: 156
结束页码: 164
语种: 英语
英文关键词: Adaptive resilience
; Aspen sexual reproduction
; Compounded disturbance
; Post-fire regeneration
; Seral versus stable aspen communities
; Species distribution model
Scopus关键词: Biodiversity
; Ecology
; Ecosystems
; Fires
; Forestry
; Neural networks
; Plants (botany)
; Population distribution
; Reforestation
; Adaptive resilience
; Compounded disturbance
; Post fire regeneration
; Sexual reproduction
; Species distribution modeling
; Climate change
; Coleoptera
; Coniferophyta
; Gymnospermae
; Populus tremuloides
英文摘要: Ecosystem resilience to climate change is contingent on post-disturbance plant regeneration. Sparse gymnosperm regeneration has been documented in subalpine forests following recent wildfires and compounded disturbances, both of which are increasing. In the US Intermountain West, this may cause a shift to non-forest in some areas, but other forests may demonstrate adaptive resilience through increased quaking aspen (Populus tremuloides Michx.) dominance. However, this potential depends on ill-defined constraints of aspen sexual regeneration under current climate. We created an ensemble of species distribution models for aspen seedling distribution following severe wildfire to define constraints on establishment. We recorded P. tremuloides seedling locations across a post-fire, post-blowdown landscape. We used 3 algorithms (Mahalanobis Typicalities, Multilayer Perceptron Artificial Neural Network, and MaxEnt) to create spatial distribution models for aspen seedlings and to define constraints. Each model performed with high accuracy and was incorporated into an ensemble model, which performed with the highest overall accuracy of all the models. Populus tremuloides seedling distribution is constrained primarily by proximity to unburned aspen forest and annual temperature ranges, and secondarily by light availability, summer precipitation, and fire severity. Based on model predictions and validation data, P. tremuloides seedling regeneration is viable throughout 54% of the post-fire landscape, 97% of which was previously conifer-dominated. Aspen are less susceptible to many climatically-sensitive disturbances (e.g. fire, beetle outbreak, wind disturbance), thus, aspen expansion represents an important adaptation to climate change. Continued aspen expansion into post-disturbance landscapes through sexual reproduction at the level suggested by these results would represent an important adaptation to climate change and would confer adaptive forest resilience by maintaining forest cover, but would also alter future disturbance regimes, biodiversity, and ecosystem services. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64111
Appears in Collections: 影响、适应和脆弱性
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作者单位: The Graduate School of Geography, Clark University, 950 Main St., Worcester, MA, United States; Pacific Island Ecosystems Research Center, 344 Crater Rim Drive, Volcano, HI, United States; Clark Labs, Clark University, 950 Main St, Worcester, MA, United States; Department of Natural Sciences, University of Alaska Southeast, 11120 Glacier Highway, Juneau, AK, United States
Recommended Citation:
Gill N.S.,Sangermano F.,Buma B.,et al. Populus tremuloides seedling establishment: An underexplored vector for forest type conversion after multiple disturbances[J]. Forest Ecology and Management,2017-01-01,404