Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.06.026 |
Long-term changes in stand growth dominance as related to resource acquisition and utilization in the boreal forest | |
Baret, Matthieu1; Pepin, Steeve2; Ward, Charles3; Pothier, David1 | |
2017-09-15 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 400 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Temporal changes in stand growth dominance, i.e. a measure of the relative contribution of different sized trees to the total stand growth, may play a role in the commonly observed decline in forest productivity over time through a shift in resource acquisition and utilization between dominant and non dominant trees. We hypothesized that the expected decreases in both growth dominance (GD) and relative growth rate (RGR) over time were related to decreases in leaf biomass of dominant trees or increases in allocation to leaf biomass of non-dominant trees. To better understand these potential relationships, we quantified stand growth dominance and some functional components (specific leaf area, leaf weight ratio, net assimilation rate, nitrogen per unit leaf area and nitrogen use efficiency) of the relative growth rate of dominant and non-dominant trees along forest development stages in the eastern Canadian boreal forest using a 1067-year-long post-fire chronosequence. As expected, stand growth dominance decreased with stand development, and was closely related to differences in RGR between dominant and non-dominant trees. Decline in both growth dominance and differences in RGR between 100 and 200 years after fire was related to greater biomass partitioning to leaves in non-dominant trees, coupled to better light acquisition capacity of non-dominant trees, which appeared in stands that were >75-years-old. In old-growth stands, the growth advantage of non-dominant trees over dominant trees involved other mechanisms, such as higher photosynthetic rates and better resource use efficiency in the non-dominant trees. Overall, the observed decrease in stand growth dominance with increasing age was explained mainly by declining resource acquisition and utilization in dominant trees rather than through improved resource acquisition and utilization of non-dominant trees. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | Growth dominance Relative growth rate Resource availability Resource use efficiency Stand development Boreal forest Old-growth stands |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406732100040 |
WOS关键词 | PONDEROSA PINE FORESTS ; LIGHT USE EFFICIENCY ; INDIVIDUAL-TREE ; HYDRAULIC LIMITATION ; PATTERNS ; COMPETITION ; DECLINE ; HYPOTHESIS ; SPRUCE ; SIZE |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22285 |
专题 | 气候变化 |
作者单位 | 1.Univ Laval, Dept Sci Bois & Foret, Ctr Etud Foret, Pavillon Abitibi Price,2405 Rue Terrasse, Quebec City, PQ G1V 0A6, Canada; 2.Univ Laval, Dept Sols & Genie Agroalimentaire, Pavillon Envirotron,2480 Blvd Hochelaga, Quebec City, PQ G1V 0A6, Canada; 3.Minist Forets, Direct Rech Forestiere, Faune & Pares Quebec 2700 Rue Einstein, Quebec City, PQ G1P 3W8, Canada |
推荐引用方式 GB/T 7714 | Baret, Matthieu,Pepin, Steeve,Ward, Charles,et al. Long-term changes in stand growth dominance as related to resource acquisition and utilization in the boreal forest[J]. FOREST ECOLOGY AND MANAGEMENT,2017,400. |
APA | Baret, Matthieu,Pepin, Steeve,Ward, Charles,&Pothier, David.(2017).Long-term changes in stand growth dominance as related to resource acquisition and utilization in the boreal forest.FOREST ECOLOGY AND MANAGEMENT,400. |
MLA | Baret, Matthieu,et al."Long-term changes in stand growth dominance as related to resource acquisition and utilization in the boreal forest".FOREST ECOLOGY AND MANAGEMENT 400(2017). |
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