DOI: 10.1016/j.foreco.2015.09.036
Scopus记录号: 2-s2.0-84942543672
论文题名: Tree fern competition reduces indigenous forest tree seedling growth within exotic Pinus radiata plantations
作者: Forbes A.S. ; Norton D.A. ; Carswell F.E.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 359 起始页码: 1
结束页码: 10
语种: 英语
英文关键词: Fern filtering
; Forest restoration
; Non-harvest plantation
; Pinus radiata
; Tree fern
Scopus关键词: Animals
; Conservation
; Growth rate
; Harvesting
; Mammals
; Reforestation
; Restoration
; Competitive effects
; Forest regeneration
; Forest restoration
; Non-harvest plantation
; Pinus radiata
; Plantation establishment
; Restoration strategies
; Tree fern
; Forestry
; coniferous tree
; dicotyledon
; fern
; forest canopy
; forest floor
; forest management
; growth rate
; keystone species
; palatability
; plantation forestry
; regrowth
; removal experiment
; restoration ecology
; seedling
; timber harvesting
; New Zealand
; Animalia
; Cyatheaceae
; Dicksoniaceae
; Filicophyta
; Mammalia
; Pinaceae
; Pinus radiata
; Pittosporaceae
; Pittosporum eugenioides
; Podocarpaceae
; Podocarpus totara
英文摘要: Tree ferns are recognized as "keystone" species for their role in casting deep shade on forest floor environments, acting as a differential ecological filter on forest regeneration processes. Tree fern dominance is a feature of New Zealand's central North Island exotic Pinus radiata (Pinaceae) plantations, particularly beyond 20. years following plantation establishment. In circumstances where plantation forests are managed for restoration of indigenous forest species, rather than timber harvest, an understanding of the competitive role of dense tree fern stands on forest regeneration processes in these "non-harvest" plantations is necessary. We investigated the competitive effect of tree fern (Cyatheaceae and Dicksoniaceae) cover on seedling growth rates of two mature forest tree species, Podocarpus totara (Podocarpaceae) and Pittosporum eugenioides (Pittosporaceae), over two austral summers in five 36-92-year P. radiata plantations. We experimentally manipulated tree fern canopies in order to contrast heavy versus light shading. Tree fern removal significantly increased the growth rate of both P. totara and P. eugenioides, and the growth rate of the shorter-lived, faster-growing, light demanding P. eugenioides was greater than that of P. totara with tree fern removal. Damage to the seedlings by mammalian animal browsers when tree ferns were removed was greater than that occurring under tree fern cover. This damage diminished the effect of tree fern removal on seedling growth rates for P. totara, but not for the faster growing P. eugenioides. The physical clearance of tree fern stands and then the establishment of fast growing, locally representative, indigenous canopy tree species of low palatability, along with protection from animal browse, are suggested restoration strategies. Our results are consistent with existing literature in showing that where tree ferns are a dominant feature of plantation understories, deep shade is likely to reduce canopy species seedling growth rates, reducing the potential for forest regeneration. © 2015 Elsevier B.V.. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65216
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: School of Forestry, University of Canterbury, Private Bag 8400, Christchurch, New Zealand; Landcare Research - Manaaki Whenua, P.O. Box 69040, Lincoln, New Zealand
Recommended Citation:
Forbes A.S.,Norton D.A.,Carswell F.E.. Tree fern competition reduces indigenous forest tree seedling growth within exotic Pinus radiata plantations[J]. Forest Ecology and Management,2016-01-01,359