气候变化领域集成服务门户(CCPortal): Decay rates of above- and below-ground coarse woody debris of common tree species in New Zealand's natural forest

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DOI	10.1016/j.foreco.2018.12.013
	Decay rates of above- and below-ground coarse woody debris of common tree species in New Zealand's natural forest
	Garrett L.G.; Kimberley M.O.; Oliver G.R.; Parks M.; Pearce S.H.; Beets P.N.; Paul T.S.H.
发表日期	2019
ISSN	0378-1127
起始页码	96
结束页码	102
卷号	438
英文摘要	Decomposition rates of above-ground coarse woody debris (CWD) (>10 cm diameter) were determined for nine common New Zealand indigenous tree species, and of below-ground CWD for two species. CWD samples were obtained from fallen trees originating from known windfall events which had been decaying for 10–29 years on the forest floor. Species-specific decay rates were estimated from the density (dry mass divided by original volume) of CWD samples relative to the density of samples from live and freshly fallen trees. The estimated half-life (t 1/2 ) or time to lose 50% mass for above-ground CWD across all species was 25.7 years but varied between species and increased with increasing stem diameter. Adjusted to a common diameter at breast height of 60 cm and mean annual temperature of 10 °C, Prumnopitys taxifolia and Fuscospora cliffortioides were the slowest to decay with a t 1/2 of about 40 years, Fuscospora fusca, Weinmannia racemosa, Beilschmiedia tawa, Lophozonia menziesii and Prumnopitys ferruginea the next slowest with a t 1/2 of 27–34 years, while the remaining species (Dacrydium cupressinum and Dacrycarpus dacrydioides) decaying more rapidly with a t 1/2 of less than 20 years. A model was derived for predicting the exponential decay constant for the above-ground CWD of individual stems as a function of diameter at breast height and mean annual temperature adjusted for species. This model can be used to predict above-ground CWD carbon stock changes in New Zealand's natural forests following tree mortality. Below-ground CWD decay rates did not differ significantly from those of above-ground CWD for D. cupressinum, but were significantly faster for L. menziesii. © 2018
英文关键词	Coarse woody debris; Dead wood; Decay rate; Decomposition; Roots; Temperature
语种	英语
scopus关键词	Debris; Decomposition; Forestry; Temperature; Coarse woody debris; Dead wood; Decay rate; Decomposition rate; Diameter-at-breast heights; Exponential decays; Mean annual temperatures; Roots; Decay (organic); coarse woody debris; coniferous tree; dead wood; decomposition; density; diameter; evergreen tree; forest floor; half life; height; root; temperature; DBH; Dead Wood; Decay; Forestry; Roots; Samples; Temperature; Trees; New Zealand; Beilschmiedia tawa; Dacrycarpus dacrydioides; Dacrydium cupressinum; Prumnopitys ferruginea; Prumnopitys taxifolia; Weinmannia racemosa
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156114
作者单位	Scion, Private Bag 3020, Rotorua, 3046, New Zealand; University of Toronto, 33 Willcocks Street, Toronto, ON M5S 3B3, Canada
推荐引用方式 GB/T 7714	Garrett L.G.,Kimberley M.O.,Oliver G.R.,et al. Decay rates of above- and below-ground coarse woody debris of common tree species in New Zealand's natural forest[J],2019,438.
APA	Garrett L.G..,Kimberley M.O..,Oliver G.R..,Parks M..,Pearce S.H..,...&Paul T.S.H..(2019).Decay rates of above- and below-ground coarse woody debris of common tree species in New Zealand's natural forest.Forest Ecology and Management,438.
MLA	Garrett L.G.,et al."Decay rates of above- and below-ground coarse woody debris of common tree species in New Zealand's natural forest".Forest Ecology and Management 438(2019).