We found that in more productive conditions (deeper soil, medium/high pH values, northfacing slopes, and “conservative” land forms) populations of B. genuense showed higher SLA, plant height and cover values. This underlies a fast-growing strategy based on high resource acquisition/use rate, as well as higher competitive ability for above-ground resources (e.g. light). The opposite trend emerged for unproductive/dry conditions (southfacing slopes, shallow soils, lower pH values). Under these constraints, SLA, plant height and cover value decreased underlying a slow-growing strategy with high conservation and low acquisition rate of resource. In addition, we found that very high nitrogen amount might have a detrimental effect on B. genuense individuals decreasing the SLA values, thus requiring the plant to change the growth strategy.
Functional response of an invasive tall grass (Brachypodium genuense) to environmental variability in sub-Mediterranean climate
TARDELLA, Federico Maria;PIERMARTERI, KARINA;POSTIGLIONE, NICOLA;CATORCI, Andrea
2016-01-01
Abstract
We found that in more productive conditions (deeper soil, medium/high pH values, northfacing slopes, and “conservative” land forms) populations of B. genuense showed higher SLA, plant height and cover values. This underlies a fast-growing strategy based on high resource acquisition/use rate, as well as higher competitive ability for above-ground resources (e.g. light). The opposite trend emerged for unproductive/dry conditions (southfacing slopes, shallow soils, lower pH values). Under these constraints, SLA, plant height and cover value decreased underlying a slow-growing strategy with high conservation and low acquisition rate of resource. In addition, we found that very high nitrogen amount might have a detrimental effect on B. genuense individuals decreasing the SLA values, thus requiring the plant to change the growth strategy.File | Dimensione | Formato | |
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