DOI: 10.1016/j.foreco.2016.10.016
Scopus记录号: 2-s2.0-84992467551
论文题名: Hunting-induced defaunation drives increased seed predation and decreased seedling establishment of commercially important tree species in an Afrotropical forest
作者: Rosin C. ; Poulsen J.R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 382 起始页码: 206
结束页码: 213
语种: 英语
英文关键词: Aucoumea klaineana
; Lophira alata
; Rodents
; Selective logging
; Timber
; Trophic cascade
Scopus关键词: Animals
; Conservation
; Forestry
; Land use
; Mammals
; Reforestation
; Timber
; Aucoumea klaineana
; Lophira alata
; Rodents
; Selective logging
; Trophic cascades
; Seed
; Afrotropical Region
; dicotyledon
; economic analysis
; forest management
; interspecific interaction
; mortality
; reproductive success
; rodent
; seed predation
; seedling establishment
; selective logging
; trophic cascade
; tropical forest
; Gabon
; Animalia
; Fungi
; Invertebrata
; Mammalia
; Rodentia
; Vertebrata
英文摘要: Human hunting is widespread in tropical forests and can substantially alter the plant-animal interactions that drive tree recruitment. Seed predation is a strong determinant of plant reproductive success, but it remains unclear how defaunation modifies this process. We examined the effects of hunting-induced defaunation on seed predation and seedling establishment, using replicated exclosure treatments at six sites across a defaunation gradient in northeastern Gabon. We monitored 5580 seeds of eight commercially important tree species that varied in seed traits such as size and dispersal mode. Rodents caused the greatest seed mortality for all species, removing ∼60% of accessible seeds. In comparison, invertebrates and fungi together caused just 6% of seed mortality. With protection from rodents, more than twice as many seeds established as seedlings, demonstrating that vertebrate seed predation was a strong filter on recruitment. With increasing defaunation, the proportion of seeds removed by rodents increased significantly, and seedling establishment decreased significantly, for most species. In heavily defaunated sites, with the lowest abundances of large mammals, seed removal by rodents increased by 63% and seedling establishment decreased by 42% compared to sites with intact fauna. Diminished seedling establishment is likely to reduce the regeneration of many tree species – including some with commercial importance – in hunted forests, with detrimental economic consequences. In turn, declines in timber regeneration may increase the likelihood that selectively logged forests are converted to non-forest land uses with little conservation value. Appropriate management could preclude these outcomes, to the benefit of both wildlife and natural timber regeneration. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64650
Appears in Collections: 影响、适应和脆弱性
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作者单位: Nicholas School of the Environment, Duke University, 450 Research Drive, Durham, NC, United States
Recommended Citation:
Rosin C.,Poulsen J.R.. Hunting-induced defaunation drives increased seed predation and decreased seedling establishment of commercially important tree species in an Afrotropical forest[J]. Forest Ecology and Management,2016-01-01,382