DOI: 10.1016/j.foreco.2012.10.019
Scopus记录号: 2-s2.0-84870179159
论文题名: Role of biotic interactions in regulating conifer invasion of grasslands
作者: Haugo R.D. ; Bakker J.D. ; Halpern C.B.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 289 起始页码: 175
结束页码: 182
语种: 英语
英文关键词: Competition
; Facilitation
; Life history
; Pseudotsuga menziesii
; Tree invasion
Scopus关键词: Abiotic conditions
; Biotic factors
; Biotic interactions
; Extrinsic factors
; Facilitation
; Forest soils
; Growing season
; Life history
; Life stages
; Negative interaction
; Pseudotsuga menziesii
; Seedling growth
; Seedling survival
; Tree invasion
; Washington
; Competition
; Cultivation
; Soils
; Vegetation
; Forestry
; biological invasion
; coniferous tree
; facilitation
; forest soil
; germination
; grassland
; growing season
; growth rate
; Index of Biotic Integrity
; life history
; mycorrhiza
; ontogeny
; prairie
; seedling
; survival
; United States
; Washington [United States]
; Coniferophyta
; Pseudotsuga
; Pseudotsuga menziesii
英文摘要: Woody-plant invasions can be regulated by positive and negative interactions with the recipient community, but the sensitivity of these interactions to ontogeny or abiotic conditions is not well understood. We experimentally examined germination, seedling survival and growth of the conifer, Pseudotsuga menziesii, in response to above- and below-ground interactions with resident vegetation in low-elevation prairies of western Washington (USA). Shading, below-ground competition, and soil origin (prairie vs. forest) had strong and, at times, interacting effects on Pseudotsuga establishment. These effects varied among life stages and years. Germination was strongly enhanced by shading and inhibited by below-ground competition during a drought year, but not during a wet year. Germinant and seedling survival were strongly enhanced by shading, inhibited by below-ground competition, and unaffected by forest soil or mycorrhizal inoculation. Seedling growth was strongly negatively affected by below-ground competition, weakly affected by soil origin, and unaffected by shading. No individuals survived a single growing season in the absence of shade and presence of competing vegetation. In contrast, the presence of shade and removal of below-ground competition increased mean survival to ∼85%. Our results demonstrate that biotic factors can regulate woody-plant invasions and that the strength and direction of these effects can differ with ontogeny and abiotic conditions. Although woody-plant invasions are typically attributed to extrinsic factors (e.g., climate, fire, or grazing), our results highlight the importance of biotic interactions as critical intrinsic controls. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66848
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Environmental and Forest Sciences, University of Washington, Box 354115, Seattle, WA 98195-4115, United States
Recommended Citation:
Haugo R.D.,Bakker J.D.,Halpern C.B.. Role of biotic interactions in regulating conifer invasion of grasslands[J]. Forest Ecology and Management,2013-01-01,289