DOI: 10.1002/eap.2042
论文题名: Assessing the ecological impacts of biomass harvesting along a disturbance severity gradient
作者: Kurth V.J. ; D'Amato A.W. ; Bradford J.B. ; Palik B.J. ; Looney C.E.
刊名: Ecological Applications
ISSN: 10510761
出版年: 2020
卷: 30, 期: 2 语种: 英语
英文关键词: biological legacy
; downed woody material
; Pinus banksiana
; Populus tremuloides
; soil nutrient stocks
; variable retention harvest
Scopus关键词: anthropogenic effect
; assessment method
; biomass
; coniferous forest
; disturbance
; ecological impact
; ecosystem response
; environmental management
; forest ecosystem
; nutrient availability
; soil nutrient
; Pinus banksiana
; Populus tremuloides
; article
; biomass
; comparative effectiveness
; expectation
; forest
; human
; landscape
; nonhuman
; nutrient availability
; physician
; pine
; plant community
; Populus tremuloides
; postharvest period
; practice guideline
; quantitative analysis
; regeneration
; soil
; species richness
; woody plant
英文摘要: Disturbance is a central driver of forest development and ecosystem processes with variable effects within and across ecosystems. Despite the high levels of variation in disturbance severity often observed in forests following natural and anthropogenic disturbance, studies quantifying disturbance impacts often rely on categorical classifications, thus limiting opportunities to examine potential gradients in ecosystem response to a given disturbance or management regime. Given the potential increases in disturbance severity associated with global change, as well as shifts in management regimes related to procurement of biofuel feedstocks, there is an increasing need to quantitatively describe disturbance severity and associated responses of forest development, soil processes, and structural conditions. This study took advantage of two replicated large-scale studies of forest biomass harvesting in Populus tremuloides and Pinus bansksiana forests, respectively, to develop and test the utility of a continuous, quantitative, disturbance severity index (DSI) for describing postharvest response of plant communities and nutrient pools to different levels of biomass removal and legacy retention (i.e., live trees and coarse woody material). There was a high degree of variability in DSI within categorical treatments associated with different levels of legacy retention and regression models using DSI as a predictor explained a portion of the variation (>50%) for many of the ecosystem- and community-level responses to biomass harvesting examined. Nutrient losses associated with biomass harvesting were positively related to disturbance severity, particularly in P. tremuloides forests, with postharvest nutrient availability generally declining along the gradient of impacts. Consistent with expectations from ecological theory, species richness and diversity of woody plant communities were greatest at intermediate disturbance severities and regeneration densities of dominant trees species were most abundant at highest levels of disturbance. Although categorical benchmarks will continue to be the primary way through which management guidelines are conveyed to practitioners, evaluation of their effectiveness at sustaining ecosystem functioning should be through continuous analyses, such as the DSI approach used in this study, to allow for the more precise identification of thresholds that ensure a range of desirable outcomes exist across managed landscapes. © 2019 by the Ecological Society of America Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159080
Appears in Collections: 气候变化与战略
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作者单位: Department of Forest Resources, University of Minnesota, Green Hall, 1530 Cleveland Avenue N, St. Paul, MN 55108, United States; Rubenstein School of Environment and Natural Resources, University of Vermont, 81 Carrigan Drive, Burlington, VT 05095, United States; Southwest Biological Science Center, U.S. Geological Survey, Flagstaff, AZ 86011, United States; USDA Forest Service, Northern Research Station, 1831 Hwy. 169 E, Grand Rapids, MN 55744, United States; Department of Forest Resources, University of Minnesota, Green Hall, 1530 Cleveland Ave. N, St. Paul, MN 55108, United States; Flathead Conservation District, 133 Interstate Lane, Kalispell, MN 59901, United States; Department of Forest and Rangeland Stewardship, Colorado State University, 1472 Campus Delivery, Fort Collins, CO 80523-1472, United States
Recommended Citation:
Kurth V.J.,D'Amato A.W.,Bradford J.B.,et al. Assessing the ecological impacts of biomass harvesting along a disturbance severity gradient[J]. Ecological Applications,2020-01-01,30(2)