气候变化领域集成服务门户(CCPortal): Fine root longevity and below- and aboveground litter production in a boreal Betula pendula forest

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DOI	10.1016/j.foreco.2018.02.039
	Fine root longevity and below- and aboveground litter production in a boreal Betula pendula forest
	Ding Y.; Leppälammi-Kujansuu J.; Helmisaari H.-S.
发表日期	2019
ISSN	0378-1127
起始页码	17
结束页码	25
卷号	431
英文摘要	1. Fine root turnover plays a critical role in carbon and nutrient cycling in forest ecosystems. In this study, we focused on the most abundant deciduous species in Nordic countries, silver birch (Betula pendula Roth) and its fine root dynamics, including the amount of litter produced by fine roots as well as by aboveground vegetation. 2. The minirhizotron method was used to quantify fine root longevity of silver birch and understory fine roots and rhizomes in northern Finland. Fine root biomass per basal area and ectomycorrhizal short root numbers per mg were also quantified. The fine root litter production was estimated by fine root biomass and longevity, and then compared with the aboveground litter collected with litter traps. 3. Birch fine root biomass was 1.4-fold higher than that of understory fine roots and rhizomes (234 ± 22, 171 ± 19 g m−2 respectively). Fine root longevity of birch (372 days) was significantly (P < 0.05) shorter than that of understory vegetation (643 days). The birch fine root longevity was positively related to root diameter and soil depth. Hazard analysis showed that thicker roots, long roots, roots produced late in the growing season, and roots growing deeper in the soil had relatively lower mortality hazard compared to the reference data. The total annual soil C input, including both birch and understory, was 283 g C m−2 yr−1. The proportion of understory annual C input was 35% of the total. Total annual belowground C input was 1.4-fold greater than that of aboveground. 4. Our study indicated that the total annual belowground litter production was greater than that of the aboveground litter in a boreal deciduous forest stand. Therefore, more emphasis should be put to quantify the C cycling of both above- and belowground parts of different tree species as well as understory in boreal forests. © 2018 Elsevier B.V.
英文关键词	Carbon; Fine root turnover; Minirhizotrons; Silver birch; Survival analysis; Understory
语种	英语
scopus关键词	Biomass; Carbon; Ecosystems; Hazards; Silver; Soils; Fine roots; Minirhizotrons; Silver birch; Survival analysis; Understory; Forestry; aboveground production; arbuscular mycorrhiza; basal area; belowground production; boreal forest; carbon cycle; deciduous tree; fine root; litter; longevity; nutrient enrichment; survival; understory; Betula Pubescens; Biomass; Carbon; Ecosystems; Hazards; Silver; Finland; Betula pendula
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/156420
作者单位	University of Helsinki, Department of Forest Sciences, P.O. Box 27, Helsinki, FI-00014, Finland
推荐引用方式 GB/T 7714	Ding Y.,Leppälammi-Kujansuu J.,Helmisaari H.-S.. Fine root longevity and below- and aboveground litter production in a boreal Betula pendula forest[J],2019,431.
APA	Ding Y.,Leppälammi-Kujansuu J.,&Helmisaari H.-S..(2019).Fine root longevity and below- and aboveground litter production in a boreal Betula pendula forest.Forest Ecology and Management,431.
MLA	Ding Y.,et al."Fine root longevity and below- and aboveground litter production in a boreal Betula pendula forest".Forest Ecology and Management 431(2019).