DOI: 10.1016/j.foreco.2012.11.043
Scopus记录号: 2-s2.0-84871895962
论文题名: Coarse woody debris carbon storage across a mean annual temperature gradient in tropical montane wet forest
作者: Iwashita D.K. ; Litton C.M. ; Giardina C.P.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 291 起始页码: 336
结束页码: 343
语种: 英语
英文关键词: Aboveground carbon storage
; Climate change
; Hawaii
; Metrosideros polymorpha
; Tree fern
Scopus关键词: Atmospheric CO
; C cycling
; Carbon storage
; Climate change impact
; Coarse woody debris
; Decay class
; Forest ecosystem
; Functional components
; Hawaii
; Information gap
; Mean annual temperatures
; Metrosideros polymorpha
; Permanent plot
; Primary objective
; Sampling technique
; Standing dead trees
; Standing tree
; Tree fern
; Tropical forest
; Carbon dioxide
; Climate change
; Digital storage
; Tropics
; Forestry
; carbon balance
; carbon sequestration
; climate change
; coarse woody debris
; dicotyledon
; elevation
; fern
; forest ecosystem
; montane forest
; rainforest
; temperature gradient
; tropical forest
; volcanic island
; Carbon
; Carbon Dioxide
; Forestry
; Hawaii
; Storage
; Tropics
; Hawaii [(ISL) Hawaiian Islands]
; Hawaii [United States]
; Hawaiian Islands
; Mauna Kea
; United States
; Filicophyta
; Metrosideros polymorpha
英文摘要: Coarse woody debris (CWD; defined here as fallen and standing dead trees and tree ferns) is a critical structural and functional component of forest ecosystems that typically comprises a large proportion of total aboveground carbon (C) storage. However, CWD estimates for the tropics are uncommon, and little is known about how C storage in CWD will respond to climate change. Given the predominant role that tropical forests play in global C cycling, this information gap compromises efforts to forecast climate change impacts on terrestrial C balance. The primary objectives of this study were to: (i) quantify CWD C storage in a tropical montane wet forest; and (ii) determine if CWD C storage varies with mean annual temperature (MAT). Coarse woody debris C was quantified with line-intercept sampling techniques in nine permanent plots located across a highly constrained 5.2°C MAT gradient spanning 800m elevation on the eastern slope of Mauna Kea Volcano, Island of Hawaii. Forests across this tropical montane MAT gradient contained large quantities of CWD C (44.3±11.2Mgha-1; Mean±1 SE), which accounted for an estimated 17% of total aboveground C storage. Across the entire gradient, CWD C was found primarily as: moderately decayed CWD (Decay Class 2); tree CWD; fallen CWD; and small diameter CWD (2-10cm). Tree ferns accounted for an average of ∼20% of total CWD C, but are rarely included in tropical CWD estimates. Overall, total CWD C ranged from 12.2 to 104.6Mgha-1 across the MAT gradient, and decreased with increasing MAT. The negative relationship between CWD and MAT was driven by large accumulations of standing tree CWD at cooler MATs, as fallen CWD did not vary with MAT. The results presented here are in line with limited evidence from tropical studies showing that CWD can make up a large fraction of total aboveground C storage. In addition, these data suggest that CWD could become a net C source to the atmosphere in tropical forests with future warming. A decrease in tropical montane CWD C storage would have important implications for global C dynamics and atmospheric CO2 levels. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66780
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Natural Resources and Environmental Management, University of Hawaii at Manoa, 1910 East-West Road, Honolulu, HI 96822, United States; Institute of Pacific Islands Forestry, Pacific Southwest Research Station, USDA Forest Service, 60 Nowelo Street, Hilo, HI 96720, United States
Recommended Citation:
Iwashita D.K.,Litton C.M.,Giardina C.P.. Coarse woody debris carbon storage across a mean annual temperature gradient in tropical montane wet forest[J]. Forest Ecology and Management,2013-01-01,291