Drivers for annual cork growth under two understory management alternatives on a podzolic cork oak stand
| Autor: | Margarida Tomé, Joana Amaral Paulo, Paulo N. Firmino, Sónia Pacheco Faias |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
cork ring 010504 meteorology & atmospheric sciences Java lupine Drainage basin Forage Cork engineering.material 010603 evolutionary biology 01 natural sciences Intraspecific competition Quercus suber montado 0105 earth and related environmental sciences computer.programming_language geography Quercus suber L geography.geographical_feature_category Forestry lcsh:QK900-989 Interspecific competition Understory 15. Life on land distance-dependent competition index shrubs lcsh:Plant ecology engineering Environmental science computer Woody plant |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Forests, Vol 10, Iss 2, p 133 (2019) Forests Volume 10 Issue 2 |
| Popis: | Understory management practices and stand density characteristics allow one to distinguish a cork oak traditional silvopastoral system (known as a montado) from a cork oak forest system. Although understanding the manner in which different management practices affect cork growth is imperative, there are still only a few outputs from experimental research that contribute to this knowledge. The effect of potential drivers on annual cork growth was analyzed using a linear mixed model approach. Two dimensions of drivers were considered: intraspecific competition, assessed by tree level distance-dependent indices and interspecific competition, assessed by variables characterizing understory management. The present dataset was collected from an experimental trial established on a cork oak stand in Podzolic soil on the Tagus river basin, covering two different cork growth cycles over the period from 2003 to 2015. The adjusted models considered two understory management alternatives: spontaneous shrubs maintenance and forage application. In both models, annual precipitation displayed a positive effect on annual cork growth, as expected. However, no significant effect of intraspecific competition was found. Additionally, there was a positive effect on annual cork growth associated with the spontaneous shrubs growth and a negative effect associated with lupine presence both effects linked to different cork ring ages&rsquo thresholds. The study main contributions are the following: (i) the introduction of the interaction between cork growth cycle stage and understory management practices, only possible with cork sample collections from different cork rotation cycles (ii) the finding that there was no significant effect of intraspecific competition on cork growth. |
| Databáze: | OpenAIRE |
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