DOI: 10.1016/j.foreco.2013.07.020
Scopus记录号: 2-s2.0-84882752456
论文题名: Influence of stand thinning and repeated fertilization on plant community abundance and diversity in young lodgepole pine stands: 15-year results
作者: Lindgren P.M.F. ; Sullivan T.P.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 308 起始页码: 17
结束页码: 30
语种: 英语
英文关键词: Biodiversity
; British Columbia
; Fertilization
; Forest management
; Lodgepole pine
; Plant productivity
Scopus关键词: Biodiversity conservation
; British Columbia
; Fertilization
; Lodgepole pine
; Pinus contorta var. latifolia
; Plant productivity
; Plant species diversity
; South-Central British Columbia
; Biodiversity
; Conservation
; Plants (botany)
; Productivity
; Wood products
; Forestry
; abundance
; biodiversity
; coniferous forest
; fertilizer application
; forest management
; harvesting
; herb
; hypothesis testing
; plant community
; shrub
; silviculture
; species diversity
; sustainability
; thinning
; Biodiversity
; Conservation
; Fertilization
; Forest Management
; Forestry
; Pinus Contorta
; Plants
; Productivity
; Wood Products
; British Columbia
; Canada
; Kelowna
; Summerland [British Columbia]
; Williams Lake [British Columbia]
英文摘要: Enhanced forest productivity may provide the supply of wood fiber to keep pace with increasing global demand for wood products and the growing constraints on the harvestable land base imposed by measures to conserve biodiversity. Stand thinning and fertilization are silvicultural practices that increase forest productivity in many situations. Intensive management has debatable impacts on plant species diversity with no consistent predictions from existing models and a general lack of long-term responses to treatments. This 15-year study was designed to test four hypotheses (H), that (H1) the application of a range of pre-commercial thinning (PCT) intensities will increase plant abundance in herb and shrub layers, (H2) fertilization will increase abundance of all plant layers (herbs, shrubs, trees, and combined total), (H3) PCT and fertilization treatments will decrease species and structural diversity of all plant layers, and (H4) enhanced abundance of vegetation will result in a decline in total species diversity and structural diversity. Study areas were located in lodgepole pine (Pinus contorta var. latifolia) stands near Summerland, Kelowna, and Williams Lake in south-central British Columbia, Canada. Each study area had nine treatments: four pairs of stands thinned to densities of ~250 (very low), ~500 (low), ~1000 (medium), and ~2000 (high) stems/ha with one stand of each pair fertilized five times at 2-year intervals, and an unthinned stand.Mean abundance (crown volume index) of herbs and shrubs were unaffected by stand density, and hence H1 was not supported. Mean abundance of herbs and mean total abundance of the plant community were significantly higher in fertilized than unfertilized stands, and hence H2 was only partially supported. Mean species richness of the herb, shrub, tree, and combined total layers were unaffected by density or fertilization. Mean species diversity of these layers were also unaffected by density, but fertilization reduced herb and shrub diversity, at least temporarily. Neither tree nor total species diversity were affected by fertilization. Mean structural diversity of herb and shrub layers were unaffected by stand density. Mean structural diversity of the tree layer was significantly greater in the most heavily thinned stands (250stems/ha) than in the unthinned and lightly thinned stands (2000stems/ha), and similar to that of the 500 and 1000stems/ha stands. Mean structural diversity of the total plant community was significantly enhanced by fertilization. Thus, H3 was partially supported for the fertilization-induced reduction in herb and shrub diversity, but structural diversity was unaffected or enhanced. A trend of decreasing total species diversity with increasing productivity supported H4. The changing relationship between productivity and structural diversity indicated that structure was more related to succession than productivity, and therefore our results did not support H4.PCT and fertilization clearly influence plant community abundance, diversity, and structure. This is one of the first studies to document the magnitude and longevity of these changes with a replicated, large-scale, and long-term study. PCT and repeated fertilization of young lodgepole pine stands appear to be management strategies compatible with wood production and biodiversity conservation. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66364
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest and Conservation Sciences, Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada
Recommended Citation:
Lindgren P.M.F.,Sullivan T.P.. Influence of stand thinning and repeated fertilization on plant community abundance and diversity in young lodgepole pine stands: 15-year results[J]. Forest Ecology and Management,2013-01-01,308