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| Content Provider | Springer Nature Link |
|---|---|
| Author | Leiva, María José Vera, María |
| Copyright Year | 2015 |
| Abstract | Acorn predation is a major bottleneck for oak self-regeneration in grazed Mediterranean oak savannahs (dehesas), which lack of shrub cover. Establishing artificial shelters of dead branches (SODBs) could decrease acorn predation by protecting the seeds against domestic ungulates. However, rodents are also common in dehesas and their dual role as acorn predators and dispersers could be affected by the SODBs. Two experiments were conducted to assess this role of the SODBs on acorn survival and dispersal. They were carried out in six dehesa stands with different levels of rodent activity (i.e., high and low). The results revealed a positive effect of the SODBs on the acorns safety in those stands with low level of rodent activity. Here, the SODBs acted as effective physical barriers against livestock, and the acorn survival was significantly higher (3- to 7-fold) beneath the SODBs than in the Open treatment. Conversely, in those stands with high level of rodent activity the SODBs significantly increased acorn predation by rodents (acorn survival was 1.6- to 9-fold lower beneath the SODBs than in the Open treatment). In addition, the SODBs acted as preferred sink for dispersed acorns, but these acorns were completely predated by mice. These results suggest that establishing SODBs could be a suitable and inexpensive method to improve oak regeneration in dehesas and in other disturbed ecosystems, especially whether this method is combined with other simple techniques to protect acorns against predation by rodents. |
| Starting Page | 965 |
| Ending Page | 978 |
| Page Count | 14 |
| File Format | |
| ISSN | 01694286 |
| Journal | New Forests |
| Volume Number | 46 |
| Issue Number | 5-6 |
| e-ISSN | 15735095 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2015-05-24 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Acorn predation Damaged oaks Piles of branches Shrub cover Structural heterogeneity Forestry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Forestry |
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