DOI: 10.1016/j.foreco.2016.07.018
Scopus记录号: 2-s2.0-85006617591
论文题名: Impact of whole-tree harvest on soil and stream water acidity in southern Sweden based on HD-MINTEQ simulations and pH-sensitivity
作者: Löfgren S. ; Ågren A. ; Gustafsson J.P. ; Olsson B.A. ; Zetterberg T.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 383 起始页码: 49
结束页码: 60
语种: 英语
英文关键词: Bioenergy
; Biological acidification
; Biomass harvest
; Forest soil
; Headwater stream
; Soil water
Scopus关键词: Acidification
; Biogeochemistry
; Biomass
; Buffer storage
; Deposition
; Ecology
; Ecosystems
; Forestry
; Harvesting
; Negative ions
; pH effects
; pH sensors
; Soil moisture
; Sulfur
; Surface waters
; Bio-energy
; Biomass harvest
; Forest soils
; Headwater stream
; Soil water
; Soils
; acidification
; bioenergy
; biomass
; forest management
; forest soil
; headwater
; humus
; numerical model
; riparian zone
; soil water
; sulfur
; surface water
; Sweden
英文摘要: The shift in major drivers of acidification from sulfur deposition to biological acidification has put the focus on the impact of biomass harvest for bioenergy on the acid base status of forests soils and surface waters. This paper presents a model-based assessment in which the impact of whole-tree harvest (WTH) is compared with that of no harvest at two different sulfur deposition levels by use of the HD-MINTEQ model. Additionally, the pH-sensitivity of 179 randomly selected boreal headwater streams was assessed. The results indicate that the exchangeable Ca2+ pool in humus and mineral soils (⩽B-horizon) is most affected by harvest. Concerning the pH, the WTH impact is restricted to shallow soils and for a much shorter period of time. The impact of WTH on the soil solution was primarily restricted to the recharge area and much less pronounced in the discharge area. Due to high buffering capacity of riparian soils and low pH-sensitivity of many headwater streams, the pH effects of WTH on surface waters will most probably be small, at least over a rotation period of several decades. Over time perspectives of multiple rotations, the pH effects are more uncertain due to a possible slow successive protonation of organic matter in the riparian zone. Another important aspect is the currently restricted availability of mobile anion charge balancing the acidity produced by tree growth. Therefore, the acidity is to a large extent arrested in the soil. At the current low S deposition levels, southwestern Sweden seems to be the least vulnerable region to further acid input due to high buffer capacity at low pH. The streams in central and northern Sweden are much more pH-sensitive, but restricted availability of mobile strong acid anions and large buffer capacity in the soils make them less vulnerable to WTH. The partly diverging results between experimental and model studies indicate that one or more processes (hydrological, chemical or biological) are not fully understood or that available data are lacking for a proper parameterization. Thus, the results from long-term WTH experiments are very important for understanding the processes involved as well as for improving and validating model predictions. We therefore encourage societal support of maintaining monitoring and research coupled to such experiments. For the future and for improving our current understanding of biogeochemical dynamics in forest ecosystems subjected to active forestry as well as for policy and management purposes, a mixture of experiments and models ought to be used. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64621
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, Uppsala, Sweden; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden; Department of Soil and Environment, Swedish University of Agricultural Sciences, P.O. Box 7014, Uppsala, Sweden; Department of Ecology, Swedish University of Agricultural Sciences, P.O. Box 7044, Uppsala, Sweden; IVL Swedish Environmental Research Institute Ltd., P.O. Box 53021, Gothenburg, Sweden
Recommended Citation:
Löfgren S.,Ågren A.,Gustafsson J.P.,et al. Impact of whole-tree harvest on soil and stream water acidity in southern Sweden based on HD-MINTEQ simulations and pH-sensitivity[J]. Forest Ecology and Management,2017-01-01,383