DOI: 10.1016/j.foreco.2013.02.007
Scopus记录号: 2-s2.0-84875253009
论文题名: The role of holm oak edges in the control of disturbance and conservation of plant diversity in fire-prone landscapes
作者: Azevedo J.C. ; Possacos A. ; Aguiar C.F. ; Amado A. ; Miguel L. ; Dias R. ; Loureiro C. ; Fernandes P.M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 297 起始页码: 37
结束页码: 48
语种: 英语
英文关键词: Edges
; Fire behavior
; Mediterranean region
; Plant diversity
; Portugal
; Quercus rotundifolia
Scopus关键词: Edges
; Fire behavior
; Mediterranean region
; Plant diversity
; Portugal
; Quercus rotundifolia
; Biodiversity
; Fires
; Forestry
; Maintenance
; Plants (botany)
; biodiversity
; deciduous forest
; fire behavior
; forest edge
; habitat conservation
; herb
; shrub
; woodland
; Biodiversity
; Forest Fires
; Maintenance
; Portugal
; Quercus Rotundifolia
; Mediterranean Region
; Portugal
英文摘要: Holm oak (Quercus rotundifolia) woodlands have been able to persist in fire-prone landscapes in northern Portugal where they seem to play a relevant role in community and landscape level patterns and processes, namely in the control of disturbance events and in the maintenance of biodiversity. In this research we tested the following hypotheses: (i) holm oak woodlands affect fire behavior, mainly by disrupting and delaying fire spread; (ii) disruption and delaying of fire spread is due to fire extinction at the edge of woodlands; and (iii) plant diversity is favored by frequent low-intensity fires as a result of the control of fire spread by holm oak woodland edges. We sampled herbaceous, shrub and tree structure and herbaceous plant composition across edges of holm oak woodlands with known recent contact with fire. Using BehavePlus we converted structural data into fuel models and simulated fire behavior for the locations sampled along the exterior-interior gradient of the woodlands. Our results indicate that holm oak woodlands play a relevant role in the control of fire spread and in the maintenance of plant diversity. We found differences in simulated maximum rate of fire spread (ROS) and fireline intensity (FLI) between outside and inside woodlands as well as a 100% probability of fire extinction when fuel moisture was >12% and wind speed at 10m aboveground was <40kmh-1, supporting the self-extinction hypothesis. We found also that richness and abundance of herbaceous plants varied between the interior and exterior of the woodland, with higher values outside the woodland, and that plant composition along the interior-exterior gradient had distinct patterns. These variables and the pattern of plant distribution were also significantly affected by time since last fire event. We conclude that holm oak woodlands affect fire behavior by interrupting fire spread at the edge zone and that fire-created edges affect herbaceous plant species richness, abundance and distribution by maintaining habitat diversity, which increased plant diversity at patch and landscape levels. Based on our results and other evidence, we developed a conceptual model of the dynamics of fire, landscape structure, and plant diversity in fire-prone landscapes where holm oak patches persist. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66636
Appears in Collections: 影响、适应和脆弱性
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作者单位: CIMO-Centro de Investigação de Montanha, Instituto Politécnico de Bragança, Campus de Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal; Unidade de Gestão Florestal do Nordeste Transmontano, Instituto da Conservação da Natureza e das Florestas, Parque Florestal, 5300-000 Bragança, Portugal; Autoridade Nacional de Protecção Civil, Comando Distrital de Operações de Socorro de Bragança, 5301-864 Bragança, Portugal; CITAB-Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Universidade de Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal
Recommended Citation:
Azevedo J.C.,Possacos A.,Aguiar C.F.,et al. The role of holm oak edges in the control of disturbance and conservation of plant diversity in fire-prone landscapes[J]. Forest Ecology and Management,2013-01-01,297