DOI: 10.1016/j.foreco.2013.07.055
Scopus记录号: 2-s2.0-84884148972
论文题名: New cohort growth and survival in variable retention harvests of a pine ecosystem in Minnesota, USA
作者: Montgomery R.A. ; Palik B.J. ; Boyden S.B. ; Reich P.B.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 310 起始页码: 327
结束页码: 335
语种: 英语
英文关键词: Aggregate retention
; Dispersed retention
; Ecological forestry
; Pinus banksiana
; Pinus resinosa
; Pinus strobus
Scopus关键词: Dispersed retention
; Pinus banksiana
; Pinus resinosa
; Pinus strobus
; Regardless of species
; Silvicultural system
; Spatial heterogeneity
; Structural complexity
; Aggregates
; Ecosystems
; Harvesting
; Resins
; Forestry
; aggregate
; coniferous tree
; disturbance
; forest management
; forestry
; growing season
; growth
; growth rate
; growth response
; harvesting
; heterogeneity
; overstory
; shade tolerance
; shrub
; silviculture
; survival
; terrestrial ecosystem
; thinning
; Aggregate
; Ecosystems
; Forestry
; Harvesting
; Pinus Banksiana
; Pinus Resinosa
; Pinus Strobus
; Synthetic Polymers
; Minnesota
; United States
英文摘要: There is significant interest in silvicultural systems such as variable retention harvesting (VRH) that emulate natural disturbance and increase structural complexity, spatial heterogeneity, and biological diversity in managed forests. However, the consequences of variable retention harvesting for new cohort growth and survival are not well characterized in many forest ecosystems. Moreover, the relative importance of resource preemption by existing ground layer vegetation after variable retention harvests is unclear. We addressed both in a VRH experiment implemented as a randomized block design replicated four times in red pine forest in Minnesota, USA. Treatments included a thinning with residual trees dispersed evenly throughout the stand (dispersed) and two patch cuts that left 0.1. ha gaps (small gap) or 0.3. ha gaps (large gap) in a forest matrix. Residual basal area was held near constant in the three harvest treatments. We planted seedlings of three common pines (Pinus banksiana, P. strobus and P. resinosa) and measured light, soil nutrients and growth over seven growing seasons. We hypothesized that forests with equivalent average structures (e.g., basal area) would have higher stand-level seedling growth and survival in aggregated retention versus dispersed retention stands. However, variable retention harvest resulted in relatively small differences in growth and survival across the three retention treatments (although all differed as expected from uncut controls). Species specific responses to overstory treatments were partially related to shade tolerance. Tolerant white pine had high survival across all overstory treatments whereas intolerant red and jack pine had lower survival in uncut controls. In general, jack pine had the strongest growth response to reduction of overstory density. However, both white and jack pine achieved highest growth in the dispersed treatment despite differences in shade tolerance. Regardless of species, shrubs had a strong impact on seedling growth. Indeed, differences in growth were often larger across shrub treatments than among retention treatments. Our results support the hypothesis that shrubs preempt resources and dampen the impacts of different overstory retention patterns on new cohort growth and survival. Our results imply that managers have considerable flexibility to employ various types of retention patterns coupled with planting in red pine ecosystems at least at the levels of retention studied here. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66242
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Department of Forest Resources, University of Minnesota, 1530 Cleveland Ave N., St. Paul, MN 55108, United States; USDA Forest Service, Northern Research Station, 1831 Hwy 169 E., Grand Rapids, MN 55744, United States; Hawkesbury Institute for the Environment, Locked Bag 1797, Penrith, NSW 2751, Australia; Department of Biology, Clarion University, 265 Science and Technology Center, Clarion, PA 55744, United States
Recommended Citation:
Montgomery R.A.,Palik B.J.,Boyden S.B.,et al. New cohort growth and survival in variable retention harvests of a pine ecosystem in Minnesota, USA[J]. Forest Ecology and Management,2013-01-01,310