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Alpine and Arctic tundra shrub populations show similar ontogenetic growth trends but differing absolute growth rates and lifespan
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SYSNO ASEP 0568954 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Alpine and Arctic tundra shrub populations show similar ontogenetic growth trends but differing absolute growth rates and lifespan Author(s) Lehejček, J. (CZ)
Trkal, F. (CZ)
Doležal, Jiří (BU-J) RID, ORCID
Čada, V. (CZ)Article number 126046 Source Title Dendrochronologia. - : Elsevier - ISSN 1125-7865
Roč. 77, February (2023)Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords alpine plant growth ; climate change ; arctic Subject RIV EF - Botanics OECD category Plant sciences, botany R&D Projects GA21-26883S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support BU-J - RVO:67985939 UT WOS 000912508200001 EID SCOPUS 85144332872 DOI 10.1016/j.dendro.2022.126046 Annotation The majority of terrestrial primary production is performed by plants, the ontogenetic growth trends of which significantly influence biomass and carbon dynamics. Here, we present a study of ontogenetic trends in primary (apical) and secondary (stem thickening) growth of plants in Arctic (Svalbard, Norway) and alpine (Krkonose, Czechia) populations of the black crowberry (Empetrum nigrum), the dominant plant species of certain tundra communities. The environmental conditions in alpine areas are more favourable for plant growth than those in the High Arctic, where temperatures are lower, there is less precipitation and soils are shallower, among other differences. These differences were clearly reflected in significant distinctions in absolute growth rates and shrub age between the populations under study. However, we found almost no divergence in ontogenetic growth trends between the populations (based on ring width measurements made from the base to the top of plants, known as serial sectioning). In both populations, primary and secondary stem base growth decrease over the course of ontogeny whereas secondary stem top growth and basal area increment increase. No significant differences in the slope of the trends were found in either primary or secondary stem base growth. Trends of the growth ratio between basal area increment and primary growth revealed neither absolute nor relative differences between the populations. Ontogenetic trends in the shrubs analysed were surprisingly stable despite the prominently dis-similar environmental conditions. Empetrum plants have adapted to the different environments by altering their absolute growth rate only. This adaptation has probably also resulted in the different longevity of plants constituting the study populations, confirming the theory that slower-growing plants live longer. Primary growth and secondary stem base growth seem to be more basic characteristics of plant growth compared to basal area increment and secondary growth at the apex because the latter two seem to be dependent on the absolute growth rate. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2024 Electronic address https://doi.org/10.1016/j.dendro.2022.126046
Number of the records: 1