DOI: 10.1016/j.foreco.2016.03.051
Scopus记录号: 2-s2.0-84962861303
论文题名: Physiological competitiveness of autumn olive compared with native woody competitors in open field and forest understory
作者: Dornbos D.L. ; Jr. ; Martzke M.R. ; Gries K. ; Hesselink R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 372 起始页码: 101
结束页码: 108
语种: 英语
英文关键词: And nitrogen fixation
; Autumn olive
; Field environment
; Forest understory
; Invasive species
; Physiological invasion traits
Scopus关键词: Carbon
; Carbon dioxide
; Competition
; Ecosystems
; Efficiency
; Nitrogen
; Nitrogen fixation
; Physiology
; Autumn olive
; Field environment
; Forest understory
; Invasive species
; Physiological invasion traits
; Forestry
; biological invasion
; chlorophyll
; comparative study
; competitiveness
; field method
; forest ecosystem
; invasive species
; nitrogen fixation
; physiological response
; seasonality
; shrub
; transpiration
; understory
; water use efficiency
; wood
; Cornus racemosa
; Crataegus
; Elaeagnus umbellata
; Juglans nigra
; Prunus serotina
英文摘要: Autumn olive (Elaeagnus umbellata Thunb.) is an invasive shrub known to flourish in abandoned farm fields, road sides and less so in forest understories. Autumn olive is categorized as a shade tolerant plant. The objectives of this research were to describe the rate of autumn olive (AO) advancement in open field and forest understory habitats and to evaluate the leaf-level physiological basis by which AO gains competitive advantage over native woody plants in these two different plant communities. The area invaded by AO in forest understory increased by 26% during a two-year period. More impressively, the density of AO increased six-fold from low (>6 m to the nearest AO plant) to high density (AO plants within 3 m of one another) during the same period. Net assimilation rate of AO was among the fastest of five woody species in the high light intensity field habitat, equal to black cherry and hawthorn, but superior to gray dogwood and black walnut. In the light-limited forest understory, however, AO fixed carbon dioxide at two to three times the rate of the four other co-habiting woody species. The higher net assimilation rate was consistently correlated with leaf chlorophyll content but not water or light use efficiencies in both field and forest environments. While trait plasticity in response to varying light environments is well known, these results demonstrate that AO invasion traits cannot be viewed simply as a species-level property rather they vary in the two different plant community assemblages. The ability of AO to fix nitrogen may contribute to its high net assimilation rate, transpiration rate, and water use efficiency across habitats. These results strongly support the high prioritization of AO control in forest understory habitats for restorative investment because of its competitive physiological traits and rapid rate of encroachment. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64919
Appears in Collections: 影响、适应和脆弱性
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作者单位: Biology Department, Calvin College, Grand Rapids, MI, United States; Calvin College, United States
Recommended Citation:
Dornbos D.L.,Jr.,Martzke M.R.,et al. Physiological competitiveness of autumn olive compared with native woody competitors in open field and forest understory[J]. Forest Ecology and Management,2016-01-01,372