DOI: 10.1016/j.foreco.2014.08.025
Scopus记录号: 2-s2.0-84907509260
论文题名: Carbon stocks in temperate forests of south-eastern Australia reflect large tree distribution and edaphic conditions
作者: Fedrigo M. ; Kasel S. ; Bennett L.T. ; Roxburgh S.H. ; Nitschke C.R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 334 起始页码: 129
结束页码: 143
语种: 英语
英文关键词: Carbon
; Forest structure
; Soil carbon
; Temperate forest
; Tree fern
Scopus关键词: Carbon
; Climate change
; Multivariant analysis
; Soils
; Uncertainty analysis
; Cool temperate rainforests
; Environmental conditions
; Environmental variables
; Forest structure
; Soil carbon
; Temperate forests
; Terrestrial carbon cycle
; Tree fern
; Forestry
; carbon cycle
; carbon sequestration
; climate change
; environmental factor
; evergreen forest
; fern
; population distribution
; soil carbon
; stand dynamics
; temperate forest
; Australia
; Filicophyta
英文摘要: Reducing uncertainty in forest carbon estimates at local and regional scales has become increasingly important due to the centrality of the terrestrial carbon cycle in issues of climate change. Despite relatively limited geographical extent, temperate forests are among the most carbon dense forests in the world. Estimates of carbon in key understorey life forms and belowground components of these forests have often been excluded from previous studies in south-eastern Australia. We estimated above- and belowground carbon stocks (including soil to 0.3m depth) in stands of cool temperate rainforest ('rainforest'), wet sclerophyll forest ('eucalypt forest'), and mixed rainforest-wet sclerophyll stands ('ecotone forest') across a wide range of environmental conditions and forest structures. We examined relationships among component carbon stocks and a range of environmental variables (edaphic, climatic, spatial) and present the first allometric equations and carbon stock estimates for south-eastern Australian tree ferns. Component carbon stocks were within the range of published values for these stand types. Using multivariate analyses of all component stocks, we detected significantly more carbon in total above- and belowground components in ecotone (697Mgha-1, 95% confidence interval 575-819Mgha-1) and eucalypt forests (689Mgha-1, 605-773Mgha-1) than rainforest (550Mgha-1, 453-647Mgha-1). However, we found no significant differences among the stand types in the proportional distribution of carbon among components despite significant differences in structural composition as indicated by size class distributions of the main genera. Of total carbon, ~48% was stored in trees (>2cm over-bark diameter), and ~72% of tree carbon was stored in the largest 10% of all trees. The most important environmental variables associated with carbon stocks irrespective of stand type were edaphic variables, most commonly total and available soil nitrogen. Tree fern carbon was the only component stock more strongly associated with climatic and spatial than edaphic variables. Our findings indicate that disturbance mediated changes in stand dynamics could significantly alter total carbon stocks, particularly if more frequent fires limit tree recruitment and increase large tree mortality. Monitoring of these forests for carbon could place greater emphasis on key structural elements associated with the largest proportion of total carbon, the largest trees. By reducing uncertainties associated with estimates of carbon in key stocks, we can better understand potential future changes to the carbon cycle from altered stand dynamics under climate change. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65705
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest and Ecosystem Science, The University of Melbourne, 500 Yarra Boulevard, Richmond, VIC, Australia; Department of Forest and Ecosystem Science, The University of Melbourne, 4 Water Street, Creswick, VIC, Australia; CSIRO Land and Water Flagship, GPO Box 1700, Australian Capital Territory 2601, ACT, Australia
Recommended Citation:
Fedrigo M.,Kasel S.,Bennett L.T.,et al. Carbon stocks in temperate forests of south-eastern Australia reflect large tree distribution and edaphic conditions[J]. Forest Ecology and Management,2014-01-01,334