globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.foreco.2014.05.043
Scopus记录号: 2-s2.0-84902964728
论文题名:
Establishment phase, spatial pattern, age, and demography of Oenocarpus bataua var. bataua can be a legacy of past loggings in the Colombian Andes
作者: Guarín J.R.; del Valle J.I.; Sierra C.A.
刊名: Forest Ecology and Management
ISSN:  0378-1127
出版年: 2014
卷: 328
起始页码: 282
结束页码: 291
语种: 英语
英文关键词: Clumped spatial pattern ; Duration of the establishment phase ; Even-aged population ; Land-use effects ; Palm demography ; Radiocarbon dating
Scopus关键词: Forestry ; Population dynamics ; Population statistics ; Value engineering ; Duration of the establishment phase ; Even-aged population ; Land-use effects ; Palm demography ; Radiocarbon dating ; Spatial patterns ; Spatial distribution ; age ; age structure ; carbon isotope ; demography ; evergreen tree ; land use change ; morphology ; ontogeny ; population structure ; radiocarbon dating ; rainforest ; seedling ; spatial analysis ; spatial distribution ; Biological Populations ; Forestry ; Statistics ; Andes
英文摘要: Oenocarpus bataua var. bataua is a key species in the tropical rain forests of South America because it is one of the 10 most abundant tree species and one of most used by Amerindians. However, there is an acute lack of verifiable information about the duration of some of its ontogenic phases, the exact age of the palms, and the effect of gap formation on its spatial distribution. We employed 36 permanent plots (PP) of 0.1ha randomly distributed in a forest of 700ha in the Colombian Andes, in which we inventoried the stemmed palms at the establishment of the PP and after 13.4years to study some ontogenic and demographic traits of this species. We dated underground and aboveground stems using the 14C bomb-effect and estimated the stem's age by the rate of leaf-scar formation. We aimed at answering the following questions: (i) what are the main morphological characteristics of the underground stem and how long does it takes for its formation?; (ii) what is the pattern of its spatial distribution at the landscape level, and what factors help to explain it?; (iii) is the population structure and demography associated with the previous history of the forest?; (iv) is the first flowering a function of the vigour of the palms?. We found that the underground stem of adult palms is usually obconical and reaches 73±13cm in length (±standard deviation). The duration of the establishment phase in eleven palms was almost constant: 37.5±0.7years. The palms with smaller and larger diameters tend to flourish when the stems are 18 and 7years old (44-55years old from seedlings), respectively. We found that this species has a clumped spatial pattern. Several palms dated gave ages between 91 and 92years, while others about 53years. The bell shaped frequency distribution of the palm's length and age suggest a lack of younger palms in this area. We interpret that both, the clumped spatial pattern and their age distribution, are a legacy from past selective loggings that induced even-aged cohorts of palms at the landscape level. This species is not in equilibrium because the population tends to be reduced through time given that its doubling time is 37.4years and its half-life 29.3years. © 2014 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65864
Appears in Collections:影响、适应和脆弱性

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作者单位: Posgrado en Bosques y Conservación Ambiental, Universidad Nacional de Colombia sede Medellín, COL, Apartado Aéreo 568, Medellín, Colombia; Universidad Nacional de Colombia sede Medellín, Departamento de Ciencias Forestales, Apartado Aéreo 568, Medellín, Colombia; Max Planck Institute for Biogeochemistry, 07745 Jena, Germany

Recommended Citation:
Guarín J.R.,del Valle J.I.,Sierra C.A.. Establishment phase, spatial pattern, age, and demography of Oenocarpus bataua var. bataua can be a legacy of past loggings in the Colombian Andes[J]. Forest Ecology and Management,2014-01-01,328
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