Autoren:	Kunz, Marcel Esper, Jan Kuhl, Eileen Schneider, Lea Büntgen, Ulf Hartl, Claudia
Titel:	Combining tree-ring width and density to separate the effects of climate variation and insect defoliation
Online-Publikationsdatum:	10-Aug-2023
Erscheinungsdatum:	2023
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	Though frequently used in dendroclimatology, European larch (Larix decidua Mill.) is regularly defoliated by mass outbreaks of the larch budmoth (Zeiraphera griseana Hb., LBM). The near-cyclic growth depressions are unrelated to but possibly coincide with cold summers, which challenges signal detection on interannual timescales. LBM defoliation events cause sharp maximum latewood density declines and irregular earlywood/latewood ratios in the outbreak year, followed by one or two anomalously narrow rings. Here, we present a process-based method integrating these diverse response patterns to identify and distinguish LBM-related signals from climate-induced deviations. Application to larch sites along elevational transects in the Swiss Alps reveals the algorithm to perform better than existing extreme event detection methods, though our approach enables additional differentiation between insect- and climate-induced signatures. The new process-based multi-parameter algorithm is a suitable tool to identify different causes of growth disturbances and will therefore help to improve both tree-ring-based climate and insect defoliation reconstructions.
DDC-Sachgruppe:	550 Geowissenschaften 550 Earth sciences 580 Pflanzen (Botanik) 580 Botanical sciences 910 Geografie 910 Geography and travel
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 09 Chemie, Pharmazie u. Geowissensch.
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-9367
Version:	Published version
Publikationstyp:	Zeitschriftenaufsatz
Weitere Angaben zur Dokumentart:	Scientific article
Nutzungsrechte:	CC BY
Informationen zu den Nutzungsrechten:	https://creativecommons.org/licenses/by/4.0/
Zeitschrift:	Forests 14 7
Seitenzahl oder Artikelnummer:	1478
Verlag:	MDPI
Verlagsort:	Basel
Erscheinungsdatum:	2023
ISSN:	1999-4907
DOI der Originalveröffentlichung:	10.3390/f14071478
Enthalten in den Sammlungen:	JGU-Publikationen