期刊
PLANT ECOLOGY
卷 218, 期 3, 页码 277-290出版社
SPRINGER
DOI: 10.1007/s11258-016-0686-6
关键词
Dendrometer; Drought; Canary Islands pine; Mediterranean climate; Radial growth; Stem water deficit
资金
- Spanish Government [CGL2006-10210/BOS, CGL2010-21366-C04-04 MCI]
- FEDER
- Austrian Science Fund Project [FWF P 22206-B16]
- Canarian Agency for Research, Innovation and Information Society [ACIISI]'' by FEDER
Tree growth of Pinus canariensis at treeline in Tenerife, Canary Islands, is thought to be primarily controlled by wet season precipitation (P) prior to the current yearA ' s growth. Therefore, we investigated the inter-annual variations in stem water deficit (Delta W) and radial growth (RG) during two consecutive years differing in wet season P. Delta W was extracted from stem circumference variations, and the influence of environmental variables was evaluated by Pearson correlation statistics. Wet season P was considerably lower in 2008 than in 2009; despite this difference in P between both years, shallow soil water availability was almost exhausted during both summers. However, the effect of shallow soil drought showing a clear seasonality of Delta W and RG was only detected in 2008. In summer 2009, RG rates were highest during the summer indicating that P. canariensis was able to tap water from deep soil layers originating from P prior to the current yearA ' s growth. The ability to use deep soil water during extended periods of shallow soil water deficit was also reflected in a close positive correlation between RG and whole-tree water use. In our study, the effect of only one hydrological dry year resulted in a severe reduction in annual RG. Thus, when wet season P is low for a number of years, chronic drought may have negative implications for tree growth at treeline in Tenerife.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据