DOI: 10.1016/j.foreco.2016.10.044
Scopus记录号: 2-s2.0-84992498953
论文题名: Assessing the long-term ecological effects of riparian management practices on headwater streams in a coastal temperate rainforest
作者: Yeung A.C.Y. ; Lecerf A. ; Richardson J.S.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 384 起始页码: 100
结束页码: 109
语种: 英语
英文关键词: Forest harvesting
; Litter decomposition
; Logging legacies
; Riparian protection
; Shredder community
; Stream recovery
Scopus关键词: Ecology
; Forestry
; Harvesting
; Logging (forestry)
; Recovery
; Reforestation
; Timber
; Water quality
; Forest harvesting
; Litter decomposition
; Riparian protection
; Shredder community
; Stream recovery
; Rivers
; best management practice
; clearcutting
; decomposition
; ecological impact
; environmental assessment
; environmental protection
; environmental restoration
; forest management
; headwater
; litter
; logging (timber)
; long-term change
; regeneration
; riparian zone
; species richness
; temperate forest
; British Columbia
; Canada
; Alnus rubra
; Invertebrata
英文摘要: Our understanding of how effective forestry Best Management Practices (BMPs) can mitigate logging impacts on the structure and functioning of temperate headwater streams tends to be based upon studies conducted within the first few years post-harvest. Little is known about how the affected biological parameters of streams change during riparian and upland forest regeneration, particularly the time taken to return to pre-harvest levels, or to within the range of reference conditions. By following up on an earlier study in southwestern British Columbia, Canada, we examined the post-logging recovery trajectories of stream attributes under multiple forest treatments. These treatments provided a gradient of riparian protection, including streamside clear-cutting with no reserves, and with fixed-width reserves (10 m and 30 m), and thinning with 50% basal area removal of riparian trees, which were compared with unharvested control sites. About 15 years after clear-cutting and 9 years after thinning, slower decomposition of red alder leaves (Alnus rubra) was reported in streams affected by forest harvesting, which was attributed to lower density of shredder invertebrates. Thinned reaches had lower litter decomposition rate than, but similar shredder density and richness to, unharvested reference sites. After a further 7 years of forest regrowth (time elapsed between the previous and present study), we found that litter decomposition rate and shredder density in logging-affected reaches converged with values in reference reaches. Stream functional integrity, as reflected by litter decomposition, increased across all forest treatments. Some differences in rarefied shredder richness among forest treatments emerged in this study. The legacy effects of thinning on some biotic variables likely diminished more quickly (2–9 years post-harvest) than those of clear-cutting with and without riparian reserves (8–15 years). Stream recovery from thinning to reference conditions should continue to warrant attention, as wider, larger-scale partial harvesting practices are recommended within emerging paradigms of forest management. Overall, our findings indicate time scales towards recovery of an important ecological process of streams under common forestry practices, which could be longer than other stream properties, such as water quality. Such differences in recovery time frames should be considered for the planning of forestry operations and monitoring of harvesting legacies. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64579
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, The University of British Columbia, Vancouver, BC, Canada; EcoLab, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, Toulouse, France
Recommended Citation:
Yeung A.C.Y.,Lecerf A.,Richardson J.S.. Assessing the long-term ecological effects of riparian management practices on headwater streams in a coastal temperate rainforest[J]. Forest Ecology and Management,2017-01-01,384