Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13631 |
Different parts, different stories: climate sensitivity of growth is stronger in root collars vs. stems in tundra shrubs | |
Ropars, Pascale1,2,3; Angers-Blondin, Sandra3,4; Gagnon, Marianne3,5; Myers-Smith, Isla H.4; Levesque, Esther3,6; Boudreau, Stephane3,5 | |
2017-08-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Scotland |
英文摘要 | Shrub densification has been widely reported across the circumpolar arctic and subarctic biomes in recent years. Long-term analyses based on dendrochronological techniques applied to shrubs have linked this phenomenon to climate change. However, the multi-stemmed structure of shrubs makes them difficult to sample and therefore leads to non-uniform sampling protocols among shrub ecologists, who will favor either root collars or stems to conduct dendrochronological analyses. Through a comparative study of the use of root collars and stems of Betula glandulosa, a common North American shrub species, we evaluated the relative sensitivity of each plant part to climate variables and assessed whether this sensitivity is consistent across three different types of environments in northwestern Quebec, Canada (terrace, hilltop and snowbed). We found that root collars had greater sensitivity to climate than stems and that these differences were maintained across the three types of environments. Growth at the root collar was best explained by spring precipitation and summer temperature, whereas stem growth showed weak and inconsistent responses to climate variables. Moreover, sensitivity to climate was not consistent among plant parts, as individuals having climate-sensitive root collars did not tend to have climate-sensitive stems. These differences in sensitivity of shrub parts to climate highlight the complexity of resource allocation in multi-stemmed plants. Whereas stem initiation and growth are driven by microenvironmental variables such as light availability and competition, root collars integrate the growth of all plant parts instead, rendering them less affected by mechanisms such as competition and more responsive to signals of global change. Although further investigations are required to determine the degree to which these findings are generalizable across the tundra biome, our results indicate that consistency and caution in the choice of plant parts are a key consideration for the success of future dendroclimatological studies on shrubs. |
英文关键词 | Betula glandulosa climate sensitivity dendrochronology dwarf birch shrub densification subarctic tundra |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404863300027 |
WOS关键词 | SIBERIAN TUNDRA ; NORTHERN QUEBEC ; LODGEPOLE PINE ; ARCTIC TUNDRA ; EXPANSION ; CANADA ; COMMUNITIES ; VEGETATION ; STRATEGIES ; RESOURCES |
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/16851 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Quebec, Chaire Rech Canada Biodivers Nord, 300 Allee Ursulines, Rimouski, PQ G5L 3A1, Canada; 2.Univ Quebec, Dept Biol Chim & Geog, 300 Allee Ursulines, Rimouski, PQ G5L 3A1, Canada; 3.Ctr Etud Nord, 2405 Ave Terrasse, Quebec City, PQ G1V 0A6, Canada; 4.Univ Edinburgh, Sch Geosci, Edinburgh EH9 3FF, Midlothian, Scotland; 5.Univ Laval, Dept Biol, 1045 Ave Med, Quebec City, PQ G1V 0A6, Canada; 6.Univ Quebec Trois Rivieres, Dept Environm Sci, 3351 Blvd Forges, Trois Rivieres, PQ G9A 5H7, Canada |
推荐引用方式 GB/T 7714 | Ropars, Pascale,Angers-Blondin, Sandra,Gagnon, Marianne,et al. Different parts, different stories: climate sensitivity of growth is stronger in root collars vs. stems in tundra shrubs[J]. GLOBAL CHANGE BIOLOGY,2017,23(8). |
APA | Ropars, Pascale,Angers-Blondin, Sandra,Gagnon, Marianne,Myers-Smith, Isla H.,Levesque, Esther,&Boudreau, Stephane.(2017).Different parts, different stories: climate sensitivity of growth is stronger in root collars vs. stems in tundra shrubs.GLOBAL CHANGE BIOLOGY,23(8). |
MLA | Ropars, Pascale,et al."Different parts, different stories: climate sensitivity of growth is stronger in root collars vs. stems in tundra shrubs".GLOBAL CHANGE BIOLOGY 23.8(2017). |
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