气候变化领域集成服务门户(CCPortal): Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines

CCPortal

DOI	10.1016/j.dendro.2024.126197
	Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines
	Houdas, Hermine; Olano, Jose Miguel; Hernandez-Alonso, Hector; Gomez, Cristina; Garcia-Hidalgo, Miguel; Domingo, Dario; Delgado-Huertas, Antonio; Sanguesa-Barreda, Gabriel
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/301911
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	Houdas, Hermine,Olano, Jose Miguel,Hernandez-Alonso, Hector,et al. Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines[J],2024,85.
APA	Houdas, Hermine.,Olano, Jose Miguel.,Hernandez-Alonso, Hector.,Gomez, Cristina.,Garcia-Hidalgo, Miguel.,...&Sanguesa-Barreda, Gabriel.(2024).Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines.DENDROCHRONOLOGIA,85.
MLA	Houdas, Hermine,et al."Pine processionary moth outbreaks and droughts have different tree ring signatures in Mediterranean pines".DENDROCHRONOLOGIA 85(2024).