DOI: 10.1016/j.foreco.2017.04.004
Scopus记录号: 2-s2.0-85018466962
论文题名: Carbon budgets in fertile grey alder (Alnus incana (L.) Moench.) stands of different ages
作者: Uri V. ; Kukumägi M. ; Aosaar J. ; Varik M. ; Becker H. ; Soosaar K. ; Morozov G. ; Ligi K. ; Padari A. ; Ostonen I. ; Karoles K.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 396 起始页码: 55
结束页码: 67
语种: 英语
英文关键词: Biomass
; Carbon fluxes
; Grey alder
; Land use history
; Net ecosystem production
; Soil respiration
Scopus关键词: Biomass
; Budget control
; Ecology
; Forestry
; Land use
; Reforestation
; Rhodium
; Soils
; Vegetation
; Carbon fluxes
; Grey alder
; Land use history
; Net ecosystem production
; Soil respiration
; Ecosystems
; age structure
; carbon budget
; carbon sequestration
; forest soil
; land use
; leaf litter
; net ecosystem production
; phytomass
; shrub
; soil fertility
; soil respiration
; stand structure
; Baltic Region
; Scandinavia
; Alnus
; Alnus incana
英文摘要: Estimation of the carbon (C) storages and fluxes in different forest ecosystems is essential for understanding their C sequestration ability. Grey alder (Alnus incana (L.) Moench) is a fast growing tree species with a great potential for short-rotation forestry in the Nordic and Baltic countries and its stands are considered C accumulating ecosystems. We hypothesized that grey alder stands growing at fertile sites act as C sinks in the young and middle-age stages, while mature stands become C sources as a consequence of declined net primary production (NPP). Net ecosystem production (NEP) was studied in five grey alder stands aged between 9 and 40 years. It was found that the NEP of the studied grey alder stands of different ages varied from −1.98 to +4.14 t C ha−1 yr−1. The oldest grey alder stand proved to be a weak C source (−0.77 t C ha−1 yr−1). However, also young alder stands regenerated in a clear-cut area may emit C in the earlier stage, owing to previous cutting and decomposition of organic residues matter. In this aspect, the land use history is of great significance. Leaf litter accounted for the largest (44–61%) annual organic C input to soil, the fine roots contributed with 12–32% and the herbaceous understorey (aboveground + belowground), with 14–26% to it. Annual cumulative soil heterotrophic respiration (Rh) in the studied stands ranged between 2.6 and 5.8 t C ha−1 yr−1; C leaching was negligible, being 10–30 kg C ha−1 yr−1. The C sequestration to soil depended on previous land use; in the first forest generation, i.e. a stand growing on previous agricultural land, the annual Corg input into soil exceeded Rh, which indicated C accumulation in soil. Although grey alder stands are generally C accumulating ecosystems, the annual biomass production of the studied stands was highly variable; thus annual NEP depended on the effect of the year rather than on stand age. The current study demonstrates that use of repeated time-series measurements applied for stands of different development stages can provide more detailed estimation of C accumulation in forest ecosystems. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64339
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Kreutzwaldi 5, Tartu, Estonia; Institute of Ecology and Earth Sciences, University of Tartu, Vanemuise 46, Tartu, Estonia
Recommended Citation:
Uri V.,Kukumägi M.,Aosaar J.,et al. Carbon budgets in fertile grey alder (Alnus incana (L.) Moench.) stands of different ages[J]. Forest Ecology and Management,2017-01-01,396