DOI: 10.1016/j.foreco.2013.05.021
Scopus记录号: 2-s2.0-84878742516
论文题名: Silvicultural disturbance has little impact on tree species diversity in a Central African moist forest
作者: Gourlet-Fleury S. ; Beina D. ; Fayolle A. ; Ouédraogo D.-Y. ; Mortier F. ; Bénédet F. ; Closset-Kopp D. ; Decocq G.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 304 起始页码: 322
结束页码: 332
语种: 英语
英文关键词: Anthropogenic disturbance
; Diversity indices
; Logging
; M'Baïki experiment
; Regeneration guild
; Thinning
Scopus关键词: Anthropogenic disturbance
; Central African Republic
; Disturbance gradients
; Diversity index
; Regeneration guild
; Small-scale disturbances
; Thinning
; Tree species diversity
; Biodiversity
; Experiments
; Logging (forestry)
; Reforestation
; anthropogenic effect
; clearcutting
; deciduous forest
; dicotyledon
; disturbance
; forest management
; forestry production
; guild
; logging (timber)
; lowland environment
; old-growth forest
; pioneer species
; regeneration
; silviculture
; species diversity
; sustainability
; thinning
; vulnerability
; Biodiversity
; Experimentation
; Logging
; Reforestation
; Thinning
; Central Africa
; Musanga cecropioides
; Urticaceae
英文摘要: Timber production is an important economic sector in most forested countries of Central Africa, where about 14 million hectares of lowland moist forests are now planned for management. This production is expected to be sustainable, but the actual impact of logging on biodiversity is still questioned.To answer this question, we used a unique long-term controlled experiment implemented more than 20. years ago in an old-growth semi-deciduous moist forest of the Central African Republic (CAR). We tested whether (i) anthropogenic disturbances associated with silvicultural operations had an effect on the composition and diversity of tree communities, and (ii) there is a relationship between diversity and disturbance intensity in those forests.For this, we botanically identified all trees. ≥. 10. cm DBH in 28 1-ha plots where no treatment (controls), logging and logging. +. thinning operations were implemented 24. years ago and created a strong gradient of disturbance. We investigated the relationships between five diversity indices and a disturbance index calculated for each 1-ha plot, for all species and separately for three regeneration guilds.We found a strong positive monotonic relationship between the intensity of disturbance and the percentage of pioneer species in the tree communities, which proved to be equally detrimental, in terms of relative abundance, to the non-pioneer light-demanding and the shade-bearing species.Overall, disturbance appeared to have a weak monotonous negative effect on diversity, irrespective to the index considered. The diversity of shade-bearers slightly decreased along the disturbance gradient without significant decrease in species density; disturbance had no effect on non-pioneer light demanders, but a clear significant negative effect on the diversity of pioneers, with a significant decrease in species density. This negative effect was associated with the massive recruitment of the early-successional, fast-growing Musanga cecropioides R. Br. (Urticaceae), which rapidly preempted space and resources in the most disturbed plots. Despite this effect, disturbance did not significantly affect the local heterogeneity in species distribution.These results suggest that the semi-deciduous moist forests of CAR are locally resilient to small-scale disturbances associated with silvicultural operations. This may be a consequence of the past anthropogenic and/or climatic disturbances, which have been stronger and more long-lasting than elsewhere within the tropical forest biome, and would have removed the most vulnerable species. Because logging intensity in these forests is usually low, we do not expect any direct major impact on tree species diversity, at least after the first felling cycle. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66467
Appears in Collections: 影响、适应和脆弱性
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作者单位: UPR BSEF, CIRAD, Campus International de Baillarguet, F-34398 Montpellier, France; Université de Bangui - Cerphameta, BP 1450 Bangui, Central African Republic; Université de Picardie Jules Verne, UR Ecologie et Dynamique des Systèmes Anthropisé (EDYSAN), FRE 3498 CNRS, 1 rue des Louvels, F-80037 Amiens, France; Ministère des Eaux, Forêts, Chasse et Pêche, Avenue du 19 janvier, BP 3314 Bangui, Central African Republic; Agro Bio-Tech, Université de Liège, 2, Passage des Déportés, B-5030 Gembloux, Belgium
Recommended Citation:
Gourlet-Fleury S.,Beina D.,Fayolle A.,et al. Silvicultural disturbance has little impact on tree species diversity in a Central African moist forest[J]. Forest Ecology and Management,2013-01-01,304