DOI: 10.1016/j.foreco.2017.07.050
Scopus记录号: 2-s2.0-85026762155
论文题名: A first look at the impediments to forest recovery in bracken-dominated clearings in the African Highlands
作者: Ssali F. ; Moe S.R. ; Sheil D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 402 起始页码: 166
结束页码: 176
语种: 英语
英文关键词: Afro-tropical forest
; Arrested succession
; Bwindi
; Competition
; Forest-bracken edge
; Invasive species
; Pteridium aquilinum
; Regeneration
Scopus关键词: Animals
; Carbon
; Competition
; Recovery
; Reforestation
; Arrested succession
; Bwindi
; Forest-bracken edge
; Invasive species
; Pteridium aquilinum
; Regeneration
; Tropical forest
; Forestry
; Animalia
; Filicophyta
; Pteridium aquilinum
; Vertebrata
英文摘要: Areas dominated by bracken, Pteridium aquilinum, occur on every continent except Antarctica. These fern thickets appear to retard forest recovery and thus reduce forest diversity and carbon values. We examined how bracken inhibits forest recovery in the Bwindi Impenetrable National Park, Uganda. We established 40 50 × 5-m transects across the forest-bracken interface. On average, we recorded 596 ± 64 large trees (stems ha−1 ± 1 SE), 1440 ± 159 saplings, 33580 ± 8860 large seedlings and 31003 ± 8854 small seedlings in the forest and 45 ± 16 large trees, 114 ± 28 saplings, 7015 ± 2268 large seedlings and 6317 ± 2240 small seedlings in bracken. All bracken clearings had been affected by fire. The density of bracken was 4.9 ± 0.3 fronds m−2. Our results suggest that distance limitation, lack of perches, damage by vertebrates and suppression by climbers all offer potential explanations of impeded regeneration in bracken. The sparser woody vegetation that occurred in bracken typically had smaller-seeded and thicker-barked tree species than the nearby forest and also included more pioneers and fewer animal dispersed species. Interestingly we detected a negative relationship between proximity to bracken plants and woody regeneration within the forest. Several key explanatory variables including canopy cover, litter depth, distance to forest and bracken density are correlated and hard to separate. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64142
Appears in Collections: 影响、适应和脆弱性
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作者单位: Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Ås, Norway
Recommended Citation:
Ssali F.,Moe S.R.,Sheil D.. A first look at the impediments to forest recovery in bracken-dominated clearings in the African Highlands[J]. Forest Ecology and Management,2017-01-01,402