Decline in holm oak coppices (Quercus ilex L. subsp. ballota (Desf.) Samp.): biometric and physiological interpretations
| Autor: | María J. Aroca, Valentín Gómez-Sanz, Sonia Roig, Javier Otero, J. Alfredo Bravo-Fernández, Rafael Serrada |
|---|---|
| Přispěvatelé: | INIA (RTA2009-00110-00-00) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Stomatal conductance below-ground biomass Soil Science Leaf water drought 01 natural sciences Basal area decay Coppicing Botany Size fractions stool lcsh:Forestry Ecology Evolution Behavior and Systematics global change above-ground biomass Biomass (ecology) biology food and beverages Forestry 04 agricultural and veterinary sciences 15. Life on land biology.organism_classification Horticulture Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries lcsh:SD1-669.5 Ballota 010606 plant biology & botany |
| Zdroj: | Forest Systems, Vol 26, Iss 2, Pp e06-e06 (2017) Forest Systems; Vol 26, No 2 (2017); e06S Forest Systems Instituto Nacional de Tecnología Agraria y Alimentaria (INIA) |
| ISSN: | 2171-9845 |
| Popis: | Aim of the study: To analyse the decline in aged holm oak coppice forests as regards above-ground and below-ground fractions and physiological features. Area of study: Centre of the Iberian Peninsula (Guadalajara province). Material and methods: 26 pairs of holm oak stools with different vigour but with similar site and structural characteristics within each pair were selected. Morphological (basal area, number of stools, maximum height) and physiological traits (leaf water potential, stomatal conductance) of the standing stools were assessed. Their aerial and underground parts were extracted and different size fractions of both their above and below-ground biomass were quantified. Linear mixed models were built to test the effect of ’ Stool vigour ’ on the mean behaviour of the measured variables. Additionally, for the aerial part, linear regressions between the weights of the different size fractions and the basal area at breast height were performed using ‘ Stool vigour ’ as a fixed factor. Main results: For the same site, root depth, and number and diameter of shoots than good vigour stools, poor vigour stools displayed: lower predawn water potential, greater leaf mass per unit of area; lower total leaf area; lower above-ground biomass (in total as well as per fractions); lower fine roots biomass; lower proportion of leaf biomass and a greater proportion of biomass of both all roots and those with diameter 2-7 cm. Research highlights: The above-ground physiological and morphological characteristics of declined stools are interpreted as poorer adaptation to site conditions. Root system architecture was found to be relevant to explain this behaviour. |
| Databáze: | OpenAIRE |
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