DOI: 10.1016/j.foreco.2016.03.033
Scopus记录号: 2-s2.0-84961165530
论文题名: Soil C: N: P dynamics during secondary succession following fire in the boreal forest of central Canada
作者: Hume A. ; Chen H.Y.H. ; Taylor A.R. ; Kayahara G.J. ; Man R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 369 起始页码: 1
结束页码: 9
语种: 英语
英文关键词: Carbon
; Fire
; Nitrogen
; Phosphorus
; Soil nutrients
; Succession
Scopus关键词: Carbon
; Ecology
; Ecosystems
; Fires
; Floors
; Mineral resources
; Minerals
; Nitrogen
; Nutrients
; Phosphorus
; Soils
; Boreal forest ecosystems
; Ecosystem functioning
; Nitrogen and phosphorus
; Secondary succession
; Soil nutrients
; Stand development
; Stoichiometric ratio
; Succession
; Forestry
; boreal forest
; concentration (composition)
; coniferous tree
; ecosystem function
; forest floor
; forest soil
; nutrient availability
; nutrient dynamics
; phosphorus
; secondary succession
; soil carbon
; soil depth
; soil nitrogen
; soil nutrient
; succession
; Canada
; Coniferophyta
英文摘要: Measures of soil nutrient availability such as concentrations of nitrogen and phosphorus ([N] and [P]) are important indicators of terrestrial productivity. Optimal plant growth and ecosystem functioning are also strongly correlated with nutrient ratios in soils. Long-term trends in soil [C], [N], [P], and their stoichiometric ratios during secondary succession in the fire-driven boreal forest remain unclear. We used replicated 7- to 209-year chronosequences to examine the influence of stand age and overstory composition on [C], [N], and [P] and their ratios in the forest floor, surface (0-15 cm), and subsurface (15-30 cm) mineral soil in the boreal forest of central Canada. In the forest floor, [C] and [N] increased rapidly during the first three decades following fire, after which they fluctuated, but remained larger than in the youngest stands. Surface soil [C] and [N] increased from young to intermediate-aged stands, but decreased in the oldest stands. Subsurface [C] and [N] followed a similar trend, but was higher in the 7-year-old stands. Forest floor [P] followed a gradual, linear increase throughout stand development but of smaller magnitude than [C] and [N]. The temporal pattern of [P] in both mineral soil layers was lower in the 33-year-old stands of all overstory types, suggesting that P resources may be outpaced by their demand during this highly competitive stage of advanced stem exclusion during forest succession. In the forest floor and surface soil, C:N differed not only with stand age but also with overstory type, due to higher C:N in intermediate-aged conifer stands. Forest floor C:P and N:P were higher in the 33- to 146-year-old stands in all overstory types and soil layers, but particularly so in the conifer stands. In the mineral layers, C:N, C:P, and N:P all followed a similar trend. Our results demonstrate the important influence of stand age, overstory composition (as influenced by succession), and soil depth on forest soil nutrient dynamics in boreal forest ecosystems. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64962
Appears in Collections: 影响、适应和脆弱性
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作者单位: Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON, Canada; Atlantic Forestry Centre, Canadian Forest Service, Natural Resources Canada, 1350 Regent Street, P.O. Box 4000, Fredericton, NB, Canada; Ontario Ministry of Natural Resources, Northeast Region, Hwy 101 E, South Porcupine, ON, Canada; Ontario Ministry of Natural Resources, Ontario Forest Research Institute, 1235 Queen Street East, Sault Ste. Marie, ON, Canada
Recommended Citation:
Hume A.,Chen H.Y.H.,Taylor A.R.,et al. Soil C: N: P dynamics during secondary succession following fire in the boreal forest of central Canada[J]. Forest Ecology and Management,2016-01-01,369