DOI: 10.1016/j.foreco.2017.09.052
Scopus记录号: 2-s2.0-85029711865
论文题名: Invasibility of a fire-maintained savanna–wetland gradient by non-native, woody plant species
作者: Just M.G. ; Hohmann M.G. ; Hoffmann W.A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 405 起始页码: 229
结束页码: 237
语种: 英语
英文关键词: Establishment limitation
; Fire ecology
; Pinus palustris
; Pyrus calleryana
; Seedling recruitment
; Streamhead pocosin
Scopus关键词: Ecosystems
; Fires
; Forestry
; Plants (botany)
; Vegetation
; Wetlands
; Establishment limitation
; Fire ecology
; Pinus palustris
; Pyrus calleryana
; Seedling recruitment
; Streamhead pocosin
; Ecology
; Pinus palustris
; Pyrus calleryana
英文摘要: Fire-promoting, open-canopy ecosystems are under threat of conversion to a fire-deterring, closed-canopy condition due to woody encroachment. This conversion of vegetation structure has been fostered by introduced woody plant species. We performed a field experiment to quantify growth, survival, and establishment success of six invasive, woody species along a managed longleaf pine savanna–wetland gradient in the Sandhills of North Carolina, USA. We investigated the effects of prescribed fire, fire history, dispersal, and abiotic conditions on the invasibility of sites along the gradient. Across 18 study sites, seeds of the six woody species were sown using three sowing methods that mimicked primary and secondary dispersal; each site contained paired plots located in savanna and savanna-wetland ecotone vegetation communities. We identified sowing treatment, abiotic conditions, seedling size, and prescribed fire as important factors for controlling woody invasion, as they prevented 5 of 6 study species from establishing in the landscape. However, the landscape was not immune to invasion. At the end of the 42-month study period, three species had established in unburned sites. In sites burned after seedling emergence, only one species, Pyrus calleryana, survived and established. We found P. calleryana survival and establishment to be a function of seedling size, soil humic matter content, and sowing treatment. Successful invasion and establishment of woody individuals in open-canopied systems increases the likelihood of fire-deterrence and further woody encroachment, threatening ecosystem integrity. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64074
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States; US Army Corps of Engineers, Engineer Research and Development Center, Champaign, IL, United States
Recommended Citation:
Just M.G.,Hohmann M.G.,Hoffmann W.A.. Invasibility of a fire-maintained savanna–wetland gradient by non-native, woody plant species[J]. Forest Ecology and Management,2017-01-01,405