DOI: 10.1016/j.foreco.2013.05.028
Scopus记录号: 2-s2.0-84879533080
论文题名: Wood decay resistance moderates the effects of tree mortality on carbon storage in the indigenous forests of New Zealand
作者: Mason N.W.H. ; Bellingham P.J. ; Carswell F.E. ; Peltzer D.A. ; Holdaway R.J. ; Allen R.B.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 305 起始页码: 177
结束页码: 188
语种: 英语
英文关键词: Carbon sequestration
; Coarse woody debris
; Disturbance
; Emissions management
; Greenhouse gasses
; REDD+
Scopus关键词: Carbon sequestration
; Coarse woody debris
; Disturbance
; Emissions management
; REDD
; Atmospheric chemistry
; Carbon dioxide
; Decay (organic)
; Digital storage
; Plants (botany)
; Surveys
; Forestry
; carbon dioxide
; carbon sequestration
; coarse woody debris
; concentration (composition)
; data set
; disturbance
; dominance
; emission control
; forest ecosystem
; greenhouse gas
; host-pathogen interaction
; interspecific variation
; measurement method
; mortality
; net ecosystem exchange
; tree
; wood
; Carbon
; Carbon Dioxide
; Chelation
; Decay
; Forestry
; Greenhouse Gases
; Plants
; Wood
; New Zealand
英文摘要: The maintenance of carbon (C) storage in indigenous forest is a key component of efforts to manage atmospheric carbon dioxide concentrations. Increased pressures from extreme climatic events and invasive pests and pathogens pose major threats to the future stability of C storage in indigenous forests through elevated canopy-tree mortality. We assessed the potential for interspecific differences in wood decay resistance to moderate decadal-scale net C losses following canopy tree mortality. We recorded tree mortality, growth and recruitment over a period spanning almost 40years in repeatedly surveyed plots spanning a wide range of mortality rates. We combined these survey data with national data on species-specific wood decay resistance (i.e. retention of wood density) to estimate contemporary C lost through decay of trees that died during our study. We also included C losses from CWD contributed by a major synchronous mortality event before the study period (legacy CWD C loss) for a subset of the plots where CWD C storage measurements were available. C flux from live to dead biomass (1.36Mgha-1year-1, s.e. 0.16) was the main factor influencing estimated net contemporary changes in C storage, with the largest net contemporary C losses (-1.5Mgha-1year-1) observed in plots experiencing high mortality. Estimated net contemporary C loss from tree mortality was reduced when the dominant species had highly decay-resistant wood. The ability to predict contemporary changes in C was significantly improved when a plot-level indicator of CWD decay resistance was included in multiple regressions. Mean legacy CWD C loss was 0.39Mgha-1year-1, s.e. 0.16. When legacy losses were incorporated in net C change estimates, both the size of the legacy CWD pool and its interaction with legacy CWD decay resistance explained a significant amount of variation in net C change in multiple regressions. In plots losing large (around 3Mgha-1year-1) amounts of C from live biomass (or with more than 300Mgha-1 C stored in legacy CWD at the start of the study) wood decay resistance altered the net C balance by as much as 1.11Mgha-1year-1, which is a considerable effect given that the mean annual C assimilation rate across plots was 1.38Mgha-1year-1. Thus, our study reveals strong potential for interspecific variation in decay resistance to moderate the impact of canopy tree mortality on C storage in forests. We suggest that research effort on wood decay rates should be prioritised toward areas, such as drought-prone regions of Amazonia, where forests are likely to experience synchronous mortality events more frequently in future. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66450
Appears in Collections: 影响、适应和脆弱性
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作者单位: Landcare Research, Private Bag 3127, Hamilton, New Zealand; Landcare Research, PO Box 69040, Lincoln 7640, New Zealand
Recommended Citation:
Mason N.W.H.,Bellingham P.J.,Carswell F.E.,et al. Wood decay resistance moderates the effects of tree mortality on carbon storage in the indigenous forests of New Zealand[J]. Forest Ecology and Management,2013-01-01,305