Forest inventory tree core archive reveals changes in boreal wood traits over seven decades.

التفاصيل البيبلوغرافية
العنوان:	Forest inventory tree core archive reveals changes in boreal wood traits over seven decades.
المؤلفون:	Bassett KR; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE901-83 Umeå, Sweden. Electronic address: kelley.bassett@slu.se., Östlund L; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE901-83 Umeå, Sweden., Gundale MJ; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE901-83 Umeå, Sweden., Fridman J; Department of Forest Resource Management, Swedish University of Agricultural Sciences, SE901-83 Umeå, Sweden., Jämtgård S; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE901-83 Umeå, Sweden.
المصدر:	The Science of the total environment [Sci Total Environ] 2023 Nov 20; Vol. 900, pp. 165795. Date of Electronic Publication: 2023 Jul 25.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0330500 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1026 (Electronic) Linking ISSN: 00489697 NLM ISO Abbreviation: Sci Total Environ Subsets: MEDLINE
أسماء مطبوعة:	Original Publication: Amsterdam, Elsevier.
مواضيع طبية MeSH:	Wood* , Ecosystem*, Dehydration ; Forests ; Nitrogen
مستخلص:	Boreal forests play an important role in the global carbon (C) cycle, and there is great interest in understanding how they respond to environmental change, including nitrogen (N) and water limitation, which could impact future forest growth and C storage. Utilizing tree cores archived by the Swedish National Forest Inventory, we measured stemwood traits, including stable N and C isotope composition which provides valuable information related to N availability and water stress, respectively, as well as N and C content, and C/N ratio over 1950-2017 in two central Swedish counties covering an area of ca. 55,000 sq. km (n = 1038). We tested the hypothesis that wood traits are changing over time, and that temporal patterns would differ depending on alternative dendrochronological reconstruction methods, i.e. the commonly applied "single tree method" (STM) or a conceptually stronger "multiple tree method" (MTM). Averaged across all MTMs, our data showed that all five wood traits for Picea abies and Pinus sylvestris changed over time. Wood δ ¹⁵ N strongly declined, indicating progressive nitrogen limitation. The decline in δ ¹³ C tracked the known atmospheric δ ¹³ CO 2 signal, suggesting no change in water stress occurred. Additionally, wood N significantly increased, while C and C/N ratios declined over time. Furthermore, wood trait patterns sometimes differed between dendrochronological methods. The most notable difference was for δ ¹⁵ N, where the slope was much shallower for the STM compared to MTMs for both species, indicating that mobility of contemporary N is problematic when using the STM, resulting in substantially less sensitivity to detect historical signals. Our study indicates strong temporal changes in boreal wood traits and also indicates that the field of dendroecology should adopt new methods and archiving practices for studying highly mobile element cycles, such as nitrogen, which are critical for understanding environmental change in high latitude ecosystems. Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.)
فهرسة مساهمة:	Keywords: Carbon isotopes; Isotope natural abundance; Nitrogen isotopes; Tree rings; Wood carbon content; Wood traits
المشرفين على المادة:	N762921K75 (Nitrogen)
تواريخ الأحداث:	Date Created: 20230727 Date Completed: 20230920 Latest Revision: 20230920
رمز التحديث:	20231215
DOI:	10.1016/j.scitotenv.2023.165795
PMID:	37499833
قاعدة البيانات:	MEDLINE

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تدمد:	1879-1026
DOI:	10.1016/j.scitotenv.2023.165795