DOI: 10.1016/j.foreco.2013.09.015
Scopus记录号: 2-s2.0-84888130870
论文题名: Temporal variation in fine-root biomass, production and mortality in a cool temperate forest covered with dense understory vegetation in northern Japan
作者: Fukuzawa K. ; Shibata H. ; Takagi K. ; Satoh F. ; Koike T. ; Sasa K.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 310 起始页码: 700
结束页码: 710
语种: 英语
英文关键词: Fine roots
; Minirhizotron
; Oak forest
; Root biomass
; Root turnover
; Soil coring
Scopus关键词: Fine roots
; Minirhizotrons
; Oak forests
; Root biomass
; Root turnover
; Soil coring
; Biomass
; Population statistics
; Soil moisture
; Vegetation
; Forestry
; biomass
; coniferous tree
; deciduous forest
; fine root
; mortality
; net primary production
; precipitation (climatology)
; seasonality
; soil depth
; soil moisture
; temperate forest
; temperature effect
; temporal cycle
; understory
; vegetation structure
; Japan
; Sasa
; Sasa senanensis
英文摘要: To understand the temporal pattern of fine-root dynamics and the factors that affect it, we investigated the seasonal and interannual variation in fine-root production (FRP) and fine-root mortality (FRM) rates, as well as fine-root biomass (FRB) and necromass in a cool temperate forest in northern Japan that was covered with dense understory vegetation of Sasa senanensis. We measured the root length density (RLD) and the rate of root production and mortality over 3yr using minirhizotrons, and compared these rates with temperature, precipitation, soil moisture, and plant area indices (PAI). We also measured the FRB and the necromass of fine roots four times per year for 2yr using soil cores and calculated dry weight-based FRP and FRM. FRB in the uppermost 15cm of the surface-soil layer accounted for 41-61% of the biomass up to 60cm soil depth, and decreased with increasing soil depth. The biomass of fine roots with root diameters <0.5mm was almost equivalent to that of roots measuring 0.5-2mm in diameter. Sasa roots accounted for 59-88% of the total FRB. FRB did not fluctuate seasonally, whereas RLD did. The FRP rate was high in mid- to late summer and correlated significantly with air and soil temperatures, indicating that temperature affects FRP. However, the relationship between FRP and soil moisture was weak. FRP was significantly correlated with the PAI of oak trees and the increment in the PAI of Sasa, suggesting that endogenous factors also affect FRP. Depending on the method used to calculate turnover, mean FRP for the 3-year study period was 589 or 726g m-2 yr-1, accounting for 36% or 41% of forest net primary production, respectively. The results of this study illustrate the substantial seasonal and interannual fluctuations in FRP, and indicate that a significant proportion of assimilated carbon was allocated to below-ground root systems in an oak-Sasa stand. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66298
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Northern Forestry and Development Office, Field Science Center for Northern Biosphere, Hokkaido University, 250 Tokuda, Nayoro 096-0071, Japan; Southern Forestry and Development Office, Field Science Center for Northern Biosphere, Hokkaido University, N9 W9 Kita-ku, Sapporo 060-8589, Japan; Teshio Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University, Toikanbetsu, Horonobe 098-2943, Japan; Research Faculty of Agriculture, Hokkaido University, N9 W9 Kita-ku, Sapporo 060-8589, Japan
Recommended Citation:
Fukuzawa K.,Shibata H.,Takagi K.,et al. Temporal variation in fine-root biomass, production and mortality in a cool temperate forest covered with dense understory vegetation in northern Japan[J]. Forest Ecology and Management,2013-01-01,310