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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Morphological and ecophysiological traits shaping altitudinal distribution of three Polylepis treeline species in the dry tropical Andes Tvůrce(i) Macek, Petr (BU-J)
Macková, J. (CZ)
de Bello, F. (FR)Celkový počet autorů 3 Zdroj.dok. Acta Oecologica-International Journal of Ecology. - : Elsevier - ISSN 1146-609X
Roč. 35, č. 6 (2009), s. 778-785Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova Cuticular waxes ; Gas exchange ; Treeline Vědní obor RIV EF - Botanika CEP LC06073 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000271969500002 DOI 10.1016/j.actao.2009.08.013 Anotace 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. Pracoviště Botanický ústav Kontakt 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 Rok sběru 2010
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