Quantifying the factors affecting leaf litter decomposition across a tropical forest disturbance gradient

doi:10.1890/ES15-00112.1

	Quantifying the factors affecting leaf litter decomposition across a tropical forest disturbance gradient
	Paudel, Ekananda; Dossa, Gbadamassi G. O.; de Blecourt, Marleen; Beckschaefer, Philip; Xu, Jianchu; Harrison, Rhett D.
	2015-12-01
发表期刊	ECOSPHERE
卷号	6 期号:12
摘要	Deforestation and forest degradation are driving unprecedented declines in biodiversity across the tropics, and understanding the consequences of these changes for ecosystem functioning is essential for human well-being. Forest degradation and loss alter ecosystem functioning through changes in species composition and abiotic conditions. However, the consequences of these changes for heterospecific processes are often poorly understood. Leaf litter decomposition is a major source of atmospheric carbon and critical for carbon and nutrient cycling. Through a highly replicated litter-bag experiment (3360 bags), we quantified the effects of litter quality, decomposer functional diversity and seasonal precipitation regime on litter decomposition along a tropical disturbance gradient in SW China. In addition, using soil and litter from sites selected from across the disturbance gradient, we established replicated litter-bed treatments and exposed these to a gradient of simulated canopy cover in a shade-house. Across the landscape, mass loss from litter-bags after 12 months varied from 7% to 98%. Even after 12 months, litter-bags installed at the beginning of the dry season had much lower mass loss than those installed at the beginning of the wet season. As expected, litter quality and faunal exclusion had substantial effects on decomposition rates. Decomposition rates declined along the disturbance gradient from mature forest, through regenerating forest to open land, although the effect size was strongly dependent on installation season. The effect of excluding meso-and macro-invertebrates increased with increasing forest degradation, whereas the effect of litter quality declined. Results from the shade-house experiment strongly suggested that forest degradation effects were driven predominantly by changes in micro-climatic conditions resulting from increased canopy openness. To better model the impacts of anthropogenic global change on litter decomposition rates, it will be important to consider landscape scale processes, such as forest degradation.
关键词	Carbon Cycle Decomposition Disturbance Gradient Landscape Leaf Litter Litter-bags Litter Fauna Mass Loss Mesocosm Seasonality Soil Properties Tropical Forest
DOI	10.1890/ES15-00112.1
收录类别	SCI
语种	英语
WOS记录号	WOS:000367311800020
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/25427
专题	中国科学院东亚植物多样性与生物地理学重点实验室
推荐引用方式 GB/T 7714	Paudel, Ekananda,Dossa, Gbadamassi G. O.,de Blecourt, Marleen,et al. Quantifying the factors affecting leaf litter decomposition across a tropical forest disturbance gradient[J]. ECOSPHERE,2015,6(12).
APA	Paudel, Ekananda,Dossa, Gbadamassi G. O.,de Blecourt, Marleen,Beckschaefer, Philip,Xu, Jianchu,&Harrison, Rhett D..(2015).Quantifying the factors affecting leaf litter decomposition across a tropical forest disturbance gradient.ECOSPHERE,6(12).
MLA	Paudel, Ekananda,et al."Quantifying the factors affecting leaf litter decomposition across a tropical forest disturbance gradient".ECOSPHERE 6.12(2015).

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Paudel_et_al-2015-Ec（2212KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载