DOI: 10.1016/j.foreco.2014.05.018
Scopus记录号: 2-s2.0-84914181074
论文题名: Differential effects of canopy trimming and litter deposition on litterfall and nutrient dynamics in a wet subtropical forest
作者: Silver W.L. ; Hall S.J. ; González G.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 332 起始页码: 47
结束页码: 55
语种: 英语
英文关键词: Aluminum
; Carbon
; Climate change
; Hurricane
; Nutrients
; Tropical forest
Scopus关键词: Aluminum
; Carbon
; Climate change
; Deposition
; Experiments
; Forestry
; Hurricanes
; Storms
; Trimming
; Tropics
; Differential effect
; Fractional composition
; Humid tropical forest
; Litterfall production
; Net ecosystem production
; Nutrient concentrations
; Subtropical forests
; Tropical forest
; Nutrients
; disturbance
; forest canopy
; hurricane
; litter
; litterfall
; nutrient cycling
; subtropical region
; tropical forest
; Aluminum
; Carbon
; Climates
; Nutrients
英文摘要: Humid tropical forests have the highest rates of litterfall production globally, which fuels rapid nutrient recycling and high net ecosystem production. Severe storm events significantly alter patterns in litterfall mass and nutrient dynamics through a combination of canopy disturbance and litter deposition. In this study, we used a large-scale long-term manipulation experiment to explore the separate and combined effects of canopy trimming and litter deposition on litterfall rates and litter nutrient concentrations and content. The deposition of fine litter associated with the treatments was equivalent to more than two times the annual fine litterfall mass and nutrient content in control plots. Results showed that canopy trimming was the primary driver of changes in litterfall and associated nutrient cycling. Canopy trimming reduced litterfall mass by 14Mgha-1 over the 2.5year post-trim period. Nutrient concentrations increased in some litter fractions following trimming, likely due to a combination of changes in the species and fractional composition of litterfall, and increased nutrient uptake from reduced competition for nutrients. Declines in litterfall mass, however, led to large reductions in litterfall nutrient content with a loss of 143±22kgNha-1 and 7±0.2kgPha-1 over the 2.5year post-trim period. There were no significant effects of litter deposition on litterfall rates or nutrient content, contrary to results from some fertilizer experiments. Our results suggest that large pulsed inputs of nutrients associated with tropical storms are unlikely to increase litterfall production, and that canopy disturbance has large and lasting effects on carbon and nutrient cycling. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65720
Appears in Collections: 影响、适应和脆弱性
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作者单位: Ecosystem Science Division, Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, United States; Global Change and Sustainability Center, University of Utah, 257 South 1400 East, 201, Salt Lake City, UT, United States; International Institute of Tropical Forestry, USDA Forest Service, Jardín Botánico Sur, 1201 Calle Ceiba, Río Piedras, PR, United States
Recommended Citation:
Silver W.L.,Hall S.J.,González G.. Differential effects of canopy trimming and litter deposition on litterfall and nutrient dynamics in a wet subtropical forest[J]. Forest Ecology and Management,2014-01-01,332