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Ontogenetic shifts in salinity stress response in Hawaiian coastal species

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Title:Ontogenetic shifts in salinity stress response in Hawaiian coastal species
Authors:Lum, Tiffany Dawn
Contributors:Barton, Kasey E. (advisor)
Botany (department)
Plant sciences
climate change
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Date Issued:Dec 2018
Publisher:University of Hawaiʻi at Mānoa
Abstract:Global climate change includes shifts in temperature and precipitation, increases in the frequency and intensity of extreme weather events, and sea level rise, all of which will drastically impact coastal ecosystems. The aim of this study is to quantify salinity tolerance across whole­plant ontogeny and to identify physiological mechanisms underlying tolerance across ontogeny in two widespread and abundant native coastal plant species, Jacquemontia sandwicensis (Convolvulaceae) and Sida fallax (Malvaceae). Salinity tolerance, quantified on the basis of survival, growth, and reproduction, varied between species and across ontogeny. Physiological and morphological leaf traits shifted across plant ontogeny and were highly plastic in response to salinity. Traits associated with salinity tolerance varied across ontogeny and between species. These results highlight how salinity effects may differ across plant developmental stages and also between functionally similar co­-occurring species, making it difficult to project species resilience under future climate change.
Description:M.S. Thesis. University of Hawaiʻi at Mānoa 2018.
Pages/Duration:58 pages
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: M.S. - Botany

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