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| Content Provider | Springer Nature Link |
|---|---|
| Author | Cooper, Arn Shapira, Or Zaidan, Sohil Moshe, Yosi Zangy, Ela Osem, Yagil |
| Copyright Year | 2014 |
| Abstract | Oak regeneration within pine monocultures is an opportunity to diversify forest structure. We examined the relationships between overstory (Pinus brutia) light interception and understory oak (Quercus ithaburensis) performance in water-limited forests. The study was performed in a mature pine plantation in Mediterranean Israel. Twenty-year-old oaks differing in location with respect to pine overstory and representing a gradient of light availability, such as open space (irradiance 100 %), interface (17–77 %), and understory (14–23 %), were monitored. Photosynthetic photon flux density (PPFD), leaf gas exchange, and twig water potential (TWP) were measured during the growth season under increasing drought stress. Predawn TWP decreased sharply from early to late spring and was positively related to irradiance during mid-spring only. Predawn to midday TWP gradient was positively related to irradiance mostly so during mid-spring. Daily averages of stomatal conductance (gs), net carbon assimilation rate (A), and transpiration rate (E) were highest in early spring and decreased gradually toward late spring. They were positively related to irradiance though this relationship became less pronounced from early to late spring. Oak height and stem basal area were positively related to irradiance. A/gs ratio was positively related to irradiance throughout the entire growth season. It increased from early to mid-spring but decreased toward late spring. A/PPFD ratio decreased from early to late spring showing a negative relationship with irradiance. We concluded that light availability was mainly responsible for spatial variation in oak performance and proposed that small-scale overstory gaps aiming for direct sunlight exposure during early spring should achieve maximum understory oak performance with minimal pine removal. |
| Starting Page | 661 |
| Ending Page | 670 |
| Page Count | 10 |
| File Format | |
| ISSN | 16124669 |
| Journal | Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch |
| Volume Number | 133 |
| Issue Number | 4 |
| e-ISSN | 16124677 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2014-02-16 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Quercus ithaburensis Pinus brutia Photosynthesis Stomatal conductance Water-use efficiency Forest management Mediterranean Forestry Plant Sciences Plant Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Forestry |
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