DOI: 10.1016/j.foreco.2017.05.033
Scopus记录号: 2-s2.0-85019981666
论文题名: Leaf area index and root biomass variation at different secondary forest ages in the eastern Amazon
作者: Cattanio J.H.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 400 起始页码: 1
结束页码: 11
语种: 英语
英文关键词: Fine-root production
; Leaf area index
; Leaf biomass
; Root ingrowth technique
; Seasonality
Scopus关键词: Agriculture
; Biogeochemistry
; Biomass
; Carbon
; Cultivation
; Forestry
; Plants (botany)
; Fine roots
; Leaf Area Index
; Leaf biomass
; Root ingrowth technique
; Seasonality
; Ecology
; aboveground biomass
; age structure
; analytical method
; belowground biomass
; biological production
; carbon sequestration
; community ecology
; crop rotation
; dry season
; fine root
; growth
; leaf area index
; nutrient dynamics
; old-growth forest
; root system
; rooting
; seasonality
; secondary forest
; shifting cultivation
; soil fertility
; Amazonia
英文摘要: In the Amazon region, small farmers use secondary forests as the only source of nutrients for agriculture, performing slash and burn in a rotation system. Secondary forests cover a large area of these landscapes and are crucial to maintaining soil fertility. The main objectives of this study were to gain insight into the seasonal variations in leaf area index (LAI) and root biomass growth, and to improve the accuracy of carbon sequestration estimates in early successional tropical secondary forests following shifting cultivation. Secondary vegetation of three different ages (1 year, 6 years and 10 years after shifting cultivation) were monitored monthly with a LI-COR Plant Canopy Analyzer, and root growth was seasonally measured down to a depth of 400 cm using ingrowth bags. The youngest secondary forests showed strong LAI seasonality, and the seasonality in LAI decreased in the oldest forest. The roots grew throughout the year even though the growth rates were higher during the dry season, which supported a dense biomass of leaves over the year. This study clearly indicates that information on deep rooting and seasonality of leaf area in secondary tropical forests is essential for understanding ecosystem ecophysiology, as well as community ecology and biogeochemical cycles. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64220
Appears in Collections: 影响、适应和脆弱性
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作者单位: Geoscience Institute, Federal University of Para, Campus Universitario do Guama, Rua Augusto Correa, n° 1, Belem, PA, Brazil
Recommended Citation:
Cattanio J.H.. Leaf area index and root biomass variation at different secondary forest ages in the eastern Amazon[J]. Forest Ecology and Management,2017-01-01,400