气候变化领域集成服务门户(CCPortal): Functional identity and functional diversity co-regulate litter mixture decomposition and nitrogen release in boreal riparian forest ponds

CCPortal

DOI	10.1007/s10533-020-00716-0
	Functional identity and functional diversity co-regulate litter mixture decomposition and nitrogen release in boreal riparian forest ponds
	Zhang X.-H.; Wang L.; Jiang W.; Mao R.
发表日期	2020
ISSN	0168-2563
起始页码	99
结束页码	111
卷号	151 期号:1
英文摘要	The relationship between biodiversity and litter decomposition has received considerable attention, but the complex biodiversity effects on decomposition and the underlying mechanisms are still unclear, especially in boreal riparian forest ponds. Here, we collected leaf litter from an N2-fixing species (Alnus sibirica) and two non-N2-fixing species (Betula platyphylla and Betula fruticosa) in a boreal riparian forest, northeast China. Then, we mixed leaf litter with varying composition and evenness to create a large gradient of litter functional identity and functional diversity, and used the litterbag method to examine the effect of altering plant composition on litter mass loss and nitrogen (N) release during 2 years of decomposition in forest ponds. Over 2 years of decomposition, the presence of A. sibirica in litter assemblages accelerated mass loss and N release by improving functional identity and increasing functional diversity of litter mixtures. Irrespective of the dominant species, litter mass loss generally increased with rising evenness, whereas the effect of species evenness on N release was dependent on the dominant species. When all litter mixtures were pooled, litter mixing effects on mass loss and N release correlated positively with litter functional diversity. Moreover, the decomposition dynamics of litter mixtures were regulated by litter functional diversity and the resulting mixing effects, as well as the community-weighted mean traits such as N and lignin concentrations. These findings confirm the importance of litter functional identity and functional diversity in driving decomposition processes of litter mixtures, and also indicate that increased abundance of N2-fixing species will accelerate litter decomposition and enhance N release in boreal riparian forest ponds. © 2020, Springer Nature Switzerland AG.
英文关键词	Biodiversity; Forest pond; Litter mixing effect; Litter trait diversity; N2-fixing species expansion
语种	英语
scopus关键词	biodiversity; boreal forest; decomposition; functional role; litter; nitrogen; nitrogen fixation; pond; riparian forest; species diversity; species evenness; China; Alnus hirsuta var. sibirica; Betula fruticosa; Betula platyphylla
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153094
作者单位	School of Environment, Nanjing Normal University, Nanjing, 210023, China; Key Laboratory of State Forestry and Grassland Administration on Forest Ecosystem Protection and Restoration of Poyang Lake Watershed, College of Forestry, Jiangxi Agricultural University, No. 1101 Zhimin Road, Nanchang, 330045, China
推荐引用方式 GB/T 7714	Zhang X.-H.,Wang L.,Jiang W.,et al. Functional identity and functional diversity co-regulate litter mixture decomposition and nitrogen release in boreal riparian forest ponds[J],2020,151(1).
APA	Zhang X.-H.,Wang L.,Jiang W.,&Mao R..(2020).Functional identity and functional diversity co-regulate litter mixture decomposition and nitrogen release in boreal riparian forest ponds.Biogeochemistry,151(1).
MLA	Zhang X.-H.,et al."Functional identity and functional diversity co-regulate litter mixture decomposition and nitrogen release in boreal riparian forest ponds".Biogeochemistry 151.1(2020).