Evaluating resistance to drought in four native forest species.
Species extinction and biodiversity loss is currently exacerbating due to climate change related prolonged periods of severe droughts. The risk of plants species extinction caused by drought is dependent on how each individual species responds to water shortage and the need for detailed investigation of forest species drives this study. This study was conducted as an experiment under controlled conditions. To evaluate the potential resistance to climate change related drought in four native forest species. The main objective was to identify drought resistant native forest species. Four forest species were grown under four treatments where water and nutrient levels were manipulated: control (high level of water +high level of nutrient), high level of water + low level of nutrient, low level of water + high level of nutrients and low level of water + low level of nutrients. Data was collected for water potential, average root length, above ground biomass (AGB), below ground biomass (BGB) and total biomass. Statistical analysis was performed using analysis of variance and Tukey test. Under drought conditions, all the species had similar roots length and AGB within treatments. BGB and total dry biomass showed similarities among most of the treatments, but not all. Three of the study species, Cordia alliodora, Terminalia. amazonia and Vochysia guatemalensis, demonstrated physiological tolerance to drought conditions and could be recommended for future use in restoration of forests as an option to mitigate climate change.
| Main Authors: | , |
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| Format: | info:eu-repo/semantics/bachelorThesis biblioteca |
| Language: | eng |
| Published: |
Universidad EARTH
2017-12
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| Subjects: | RESISTENCIA A LA SEQUIA, ESPECIES NATIVAS, BOSQUES TROPICALES, CORDIA ALLIODORA, TERMINALIA AMAZONIA, VOCHYSIA GUATEMALENSIS, https://purl.org/pe-repo/ocde/ford#4.01.01, |
| Online Access: | https://repositorio.earth.ac.cr/handle/UEARTH/388 |
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