Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14561 |
Tree rings provide no evidence of a CO2 fertilization effect in old-growth subalpine forests of western Canada | |
Hararuk, Oleksandra1,2; Campbell, Elizabeth M.3; Antos, Joseph A.4; Parish, Roberta5 | |
2019-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:4页码:1222-1234 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | Atmospheric CO2 concentrations are now 1.7 times higher than the preindustrial values. Although photosynthetic rates are hypothesized to increase in response to rising atmospheric CO2 concentrations, results from in situ experiments are inconsistent in supporting a CO2 fertilization effect of tree growth. Tree-ring data provide a historical record of tree-level productivity that can be used to evaluate long-term responses of tree growth. We use tree-ring data from old-growth, subalpine forests of western Canada that have not had a stand-replacing disturbance for hundreds of years to determine if growth has increased over 19th and 20th centuries. Our sample consisted of 5,858 trees belonging to five species distributed over two sites in the coastal zone and two in the continental climate of the interior. We calculated annual increments in tree basal area, adjusted these increments for tree size and age, and tested whether there was a detectable temporal trend in tree growth over the 19th and 20th centuries. We found a similar pattern in 20th century growth trends among all species at all sites. Growth during the 19th century was mostly stable or increasing, with the exception of one of the coastal sites, where tree growth was slightly decreasing; whereas growth during the 20th century consistently decreased. The unexpected decrease in growth during the 20th century indicates that there was no CO2 fertilization effect on photosynthesis. We compared the growth trends from our four sites to the trends simulated by seven Earth System Models, and saw that most of the models did not predict these growth declines. Overall, our results indicate that these old-growth forests are unlikely to increase their carbon storage capacity in response to rising atmospheric CO2, and thus are unlikely to contribute substantially to offsetting future carbon emissions. |
英文关键词 | climate change CO2 fertilization effect dendroecology global warming old-growth forests tree growth tree rings |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461817500005 |
WOS关键词 | EARTH SYSTEM MODEL ; INTERIOR BRITISH-COLUMBIA ; ANCIENT MONTANE FOREST ; ELEVATED CO2 ; CLIMATE-CHANGE ; CARBON SEQUESTRATION ; NITROGEN MINERALIZATION ; FUTURE CLIMATE ; SEEDLING BANK ; PLANT-GROWTH |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/18241 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92717 USA; 2.Univ Cent Florida, Dept Biol, 4110 Libra Dr, Orlando, FL 32816 USA; 3.Canadian Forest Serv, Nat Resources Canada, Pacific Forestry Ctr, Victoria, BC, Canada; 4.Univ Victoria, Dept Biol, Victoria, BC, Canada; 5.Azura Formetr Ltd, Victoria, BC, Canada |
推荐引用方式 GB/T 7714 | Hararuk, Oleksandra,Campbell, Elizabeth M.,Antos, Joseph A.,et al. Tree rings provide no evidence of a CO2 fertilization effect in old-growth subalpine forests of western Canada[J]. GLOBAL CHANGE BIOLOGY,2019,25(4):1222-1234. |
APA | Hararuk, Oleksandra,Campbell, Elizabeth M.,Antos, Joseph A.,&Parish, Roberta.(2019).Tree rings provide no evidence of a CO2 fertilization effect in old-growth subalpine forests of western Canada.GLOBAL CHANGE BIOLOGY,25(4),1222-1234. |
MLA | Hararuk, Oleksandra,et al."Tree rings provide no evidence of a CO2 fertilization effect in old-growth subalpine forests of western Canada".GLOBAL CHANGE BIOLOGY 25.4(2019):1222-1234. |
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