DOI: 10.3354/cr01452
Scopus记录号: 2-s2.0-85028909072
论文题名: Forests dynamics in the montane-alpine boundary: A comparative study using satellite imagery and climate data
作者: Dinca L. ; Nita M.D. ; Hofgaard A. ; Alados C.L. ; Broll G. ; Borz S.A. ; Wertz B. ; Monteiro A.T.
刊名: Climate Research
ISSN: 0936577X
出版年: 2017
卷: 73, 期: 2019-01-02 起始页码: 97
结束页码: 110
语种: 英语
英文关键词: Mountains
; National park
; Remote sensing
; Tree lines
Scopus关键词: alpine environment
; anthropogenic effect
; comparative study
; forest cover
; forest dynamics
; global warming
; growing season
; image classification
; land cover
; Landsat
; montane forest
; mountain region
; national park
; remote sensing
; satellite imagery
; treeline
; Austria
; Carpathians
; Pyrenees
英文摘要: Over the past decades, the altitudinal and latitudinal advance of forest lines has increased due to global warming and the abandonment of less productive areas previously subject to agricultural activities. The intensity and speed of the forest line advance also depend on numerous physical, biological and human factors that are region-specific. It is important to fully understand the mechanisms behind forest line behaviour, as existing studies do not report global figures. We selected 4 study areas in which to analyse the temporal and spatial behaviour of the forest line and of forest cover based on selection criteria such as minimal human interference and maximal representativeness at the European level. The sites were located in national parks that were evenly spread across some of the dominant European mountain ranges such as the Pyrenees, Alps and Carpathians, at comparable altitudes and latitudes, and with similar land cover proportions in the year 1970. Methodologically, we used cloud-free Landsat satellite images that were acquired in the same month during the growing season. A post-classification comparison technique, using all bands but the thermal one, was implemented to evaluate forest line behaviour, while the accuracy of image classification was evaluated by random sampling. Four time frames were used to evaluate forest cover behaviour in relation to the non-forested areas: 1971-1980, 1981-1990, 1991-2000 and 2001-2014. Also, climate and topography data were included in this study, which enabled comparison and computation of dependence relations. Our results indicate significant differences between the analysed areas. For instance, for the same reference period (1981-1990), the greatest differences in terms of forest cover change were specific to the Austrian Alps (28%), whereas the lowest differences were those from the Spanish Pyrenees (1%). Similar forest line shifts were found in the Austrian Alps and in the Romanian Carpathians, whereas the lowest altitudinal advancement was specific to the Spanish Pyrenees. According to this study, the temperature trend could have significantly influenced tree line behaviour. © The authors 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116313
Appears in Collections: 气候减缓与适应
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Recommended Citation:
Dinca L.,Nita M.D.,Hofgaard A.,et al. Forests dynamics in the montane-alpine boundary: A comparative study using satellite imagery and climate data[J]. Climate Research,2017-01-01,73(2019-01-02)