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| Content Provider | Springer Nature Link |
|---|---|
| Author | Meier, Ina C. Leuschner, Christoph |
| Copyright Year | 2008 |
| Abstract | Plants across diverse biomes tend to produce smaller leaves and a reduced total leaf area when exposed to drought. For mature trees of a single species, however, the leaf area–water supply relationship is not well understood. We tested the paradigm of leaf area reduction upon drought by a transect study with 14 mature Fagus sylvatica forests along a steep precipitation gradient (970–520 mm y−1) by applying two independent methods of leaf size determination. Contrary to expectation, average leaf size in dry stands (520–550 mm y−1) was about 40% larger and SLA was higher than in moist stands (910–970 mm y−1). As a result of increased leaf sizes, leaf area index significantly increased from the high- to the low-precipitation stands. Multiple regression analyses suggested that average leaf size was primarily controlled by temperature, whereas the influence of soil moisture and soil C/N ratio was low. Summer rainfall of the preceding year was the most significant predictor of total leaf number. We assume that leaf expansion of beech was independent of water supply, because it takes place in May with ample soil water reserves along the entire transect. In contrast, bud formation, which determines total leaf number, occurs in mid-summer, when droughts are severest. We conclude that leaf expansion and stand leaf area of beech along this precipitation gradient are not a simple function of water availability, but are controlled by several abiotic factors including spring temperature and possibly also nitrogen supply, which both tend to increase toward drier sites, thus overlaying any negative effect of water shortage on leaf development. |
| Starting Page | 655 |
| Ending Page | 669 |
| Page Count | 15 |
| File Format | |
| ISSN | 14329840 |
| Journal | Ecosystems |
| Volume Number | 11 |
| Issue Number | 5 |
| e-ISSN | 14350629 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2008-05-31 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | adult trees bud formation drought European beech LAI leaf expansion leaf population precipitation gradient Nature Conservation Geoecology/Natural Processes Environmental Management Zoology Plant Sciences Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Environmental Chemistry Ecology, Evolution, Behavior and Systematics |
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