DOI: 10.1007/s10584-016-1594-4
Scopus记录号: 2-s2.0-84961185048
论文题名: Subalpine fires: the roles of vegetation, climate and, ultimately, land uses
作者: Leys B. ; Carcaillet C.
刊名: Climatic Change
ISSN: 0165-0009
EISSN: 1573-1480
出版年: 2016
卷: 135, 期: 2018-03-04 起始页码: 683
结束页码: 697
语种: 英语
Scopus关键词: Deforestation
; Forestry
; Land use
; Vegetation
; Broadleaved trees
; Burning activity
; Fire frequencies
; Fire return intervals
; High temperature
; Vegetation composition
; Vegetation fire
; Vegetation history
; Fires
; burning
; climate change
; climate effect
; forest fire
; grassland
; Holocene
; land use change
; paleoenvironment
; subalpine environment
; vegetation dynamics
; vegetation history
; Larix decidua
; Pinus cembra
英文摘要: Forest fires are controlled by local (vegetation, aspect, elevation, land uses) and regional (climate) factors. The role of these factors remains poorly assessed on centennial to millennial time scales. Here, we investigate fire and vegetation history in five subalpine sites over the past 8000 years to determine when, how, and why there were differences in fire regimes. We focus on time and aspect separately and account for vegetation composition. There are no significant differences in the fire return intervals among sites (~290 years between two fires). The rise of fire frequency from its lowest values (1.5 fires.1000 yr−1) at 8000–7000 years before present (yrBP) to its highest at 4000-3000 yrBP (5 fires-1000 yr−1) is well explained by the high temperatures and low precipitation of the Holocene, both leading to better conditions for fire ignition and spread. From 8000 yrBP, climate is likely the main factor driving the fire frequency on the north-facing sites, which contained mixed Larix decidua-Pinus cembra vegetation; whereas south-facing sites, dominated by the flammable P. cembra and broadleaved trees, appear to be driven by local features, including land use. A shift in the main drivers occurs at 4000 yrBP, when local processes start to control burning activity at all sites. Forest clearance for land use might have directly increased fire frequency, but has also helped to suppress fires through fuel limitation. During the last four millennia, land use likely altered the natural climate-vegetation-fire system mainly by converting forests to grassland by pastoral practices, thus leading to less fire and making the fire-vegetation-climate relationships more complex. © 2016, Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/84348
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: Ecole Pratique des Hautes Études (EPHE), 4-14 rue Ferrus, Paris, France; Centre d’Ecologie Fonctionnelle et Evolutive (UMR 5175 CNRS), campus CNRS, 1919 route de Mende, Montpellier cedex 5, France; Lab Ecologie des Hydrosystèmes Naturels et Anthropisés (UMR5023 CNRS), Université Lyon 1, Villeurbanne, France
Recommended Citation:
Leys B.,Carcaillet C.. Subalpine fires: the roles of vegetation, climate and, ultimately, land uses[J]. Climatic Change,2016-01-01,135(2018-03-04)