Back to Search
Start Over
Modeling spatial patterns of humus forms in montane and subalpine forests: Implications of local variability for upscaling
- Source :
- Sustainability, Volume 11, Issue 1, Sustainability, Vol 11, Iss 1, p 48 (2018)
- Publication Year :
- 2018
-
Abstract
- Humus forms are a distinctive morphological indicator of soil organic matter decomposition. The spatial distribution of humus forms depends on environmental factors such as topography, climate and vegetation. In montane and subalpine forests, environmental influences show a high spatial heterogeneity, which is reflected by a high spatial variability of humus forms. This study aims at examining spatial patterns of humus forms and their dependence on the spatial scale in a high mountain forest environment (Val di Sole/Val di Rabbi, Trentino, Italian Alps). On the basis of the distributions of environmental covariates across the study area, we described humus forms at the local scale (six sampling sites), slope scale (60 sampling sites) and landscape scale (30 additional sampling sites). The local variability of humus forms was analyzed with regard to the ground cover type. At the slope and landscape scale, spatial patterns of humus forms were modeled applying random forests and ordinary kriging of the model residuals. The results indicate that the occurrence of the humus form classes Mull, Mullmoder, Moder, Amphi and Eroded Moder generally depends on the topographical position. Local-scale patterns are mostly related to micro-topography (local accumulation and erosion sites) and ground cover, whereas slope-scale patterns are mainly connected with slope exposure and elevation. Patterns at the landscape scale show a rather irregular distribution, as spatial models at this scale do not account for local to slope-scale variations of humus forms. Moreover, models at the slope scale perform distinctly better than at the landscape scale. In conclusion, the results of this study highlight that landscape-scale predictions of humus forms should be accompanied by local- and slope-scale studies in order to enhance the general understanding of humus form patterns.<br />Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1128
- Subjects :
- lcsh:GE1-350
Planning and Development
Sustainability and the Environment
Geography
Monitoring
Policy and Law
lcsh:Environmental effects of industries and plants
lcsh:TJ807-830
lcsh:Renewable energy sources
2105 Renewable Energy, Sustainability and the Environment
Italian Alps
forest soils
Management
lcsh:TD194-195
spatial modeling
10122 Institute of Geography
multi-scale analysis
3305 Geography, Planning and Development
2308 Management, Monitoring, Policy and Law
Renewable Energy
910 Geography & travel
soil organic matter decomposition
690 Hausbau, Bauhandwerk
lcsh:Environmental sciences
random forest
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Sustainability, Volume 11, Issue 1, Sustainability, Vol 11, Iss 1, p 48 (2018)
- Accession number :
- edsair.doi.dedup.....70cbfd29a0b922b719991af897fc64cb