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Morphological and ecophysiological traits shaping altitudinal distribution of three Polylepis treeline species in the dry tropical Andes
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SYSNO ASEP 0340122 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Morphological and ecophysiological traits shaping altitudinal distribution of three Polylepis treeline species in the dry tropical Andes Author(s) Macek, Petr (BU-J)
Macková, J. (CZ)
de Bello, F. (FR)Number of authors 3 Source Title Acta Oecologica-International Journal of Ecology. - : Elsevier - ISSN 1146-609X
Roč. 35, č. 6 (2009), s. 778-785Number of pages 8 s. Language eng - English Country FR - France Keywords Cuticular waxes ; Gas exchange ; Treeline Subject RIV EF - Botanics R&D Projects LC06073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000271969500002 DOI 10.1016/j.actao.2009.08.013 Annotation Numerous species of the genus Polylepis form the highest treeline in the world, with striking dissimilarities in their upper altitudinal limits. The commonly accepted hypothesis is: growth at a treeline is temperature-limited. Using records of morphological and ecophysiological traits, we aimed to identify other factors influencing altitudinal distribution of P. tarapacana, P. tomentella and P. rugulosa in dry tropical Andes. Trait changes were generally more pronounced in P. rugulosa (it had e.g. elevated transpiration, cuticular waxes most enriched in 13C). Trade-offs linked to leaf area likely drive differentiation and adaptations to altitude of these species. While the upper distribution limit of P. tarapacana and P. tomentella is driven by low temperature, water is an important additional factor controlling the altitudinal distribution of P. rugulosa. Hence, water stress needs to be taken into account among the factors shaping altitudinal distribution of tropical treeline species. 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 2010
Number of the records: 1