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| DOI | 10.1016/j.dendro.2024.126197 |
| Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines | |
| 发表日期 | 2024 |
| ISSN | 1125-7865 |
| EISSN | 1612-0051 |
| 起始页码 | 85 |
| 卷号 | 85 |
| 英文摘要 | Defoliating insects' outbreaks play a critical role in trees' carbon cycle. The pine processionary moth (PPM; Thaumetopoea pityocampa) is the major defoliating insect of Mediterranean coniferous forests. The frequency and intensity of PPM outbreaks is projected to increase as winter temperatures become milder due to climate warming. An accurate evaluation of this projection requires a wide spatial baseline of the historical PPM incidence. PPM outbreaks affect tree secondary growth leading to narrow rings, providing a tree level signal. However, PPM defoliation rings can be confounded with drought rings, the most frequent cause of narrow rings in Mediterranean environments. Thus, an accurate identification of PPM rings demands the consideration of additional tree ring traits. Here, we introduce a multiproxy approach to identify and distinguish PPM and drought events. We sampled four Pinus nigra (3) and P. sylvestris (1) stands in Spain. We identified and verified years of PPM defoliation using remote sensing analysis and field observations of Regional Forest Service. We identified drought events through the combination of climatic data with radial growth reductions. We considered climate growth residuals, among-trees growth variability, latewood percentage (%LW), intrinsic water-use efficiency (iWUE) and minimum blue intensity (BI) to discern between droughts and PPM outbreaks. In comparison with drought rings, PPM rings showed 1) more negative residuals in climate growth models, 2) higher secondary growth variance, 3) higher percentage of latewood and 4) lower iWUE. Minimum BI did not differ between drought and PPM rings, but was lower than in the rest of the rings. The combination of these traits provides a signature to identify PPM rings, opening the opportunity to reconstruct PPM incidence on a broad spatio-temporal scale. |
| 英文关键词 | blue intensity; drought; insect defoliations; latewood; stable isotopes; tree growth |
| 语种 | 英语 |
| WOS研究方向 | Forestry ; Physical Geography |
| WOS类目 | Forestry ; Geography, Physical |
| WOS记录号 | WOS:001219069600001 |
| 来源期刊 | DENDROCHRONOLOGIA
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/301910 |
| 作者单位 | Universidad de Valladolid; University of Aberdeen; University of Zaragoza; University of Granada; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Instituto Andaluz de Ciencias de la Tierra (IACT) |
| 推荐引用方式 GB/T 7714 | . Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines[J],2024,85. |
| APA | (2024).Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines.DENDROCHRONOLOGIA,85. |
| MLA | "Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines".DENDROCHRONOLOGIA 85(2024). |
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