墾丁地區密集迷紋珊瑚(Leptoria phrygia)和鐘形微孔珊瑚(Porites lutea)對不同溫度環境的生理差異及馴化過程 Physiological differences and acclimatisation processes in two scleractinian corals: Leptoria phrygia and Porites lutea, from two sites with contrasting temperature regimes in Kenting National Park, southern Taiwan

dc.contributor 陳昭倫 zh_TW
dc.contributor Chaolun Allen Chen en_US
dc.contributor.author 高洛德 zh_TW
dc.contributor.author Rodrigo Enrique Carballo Bolanos en_US
dc.date.accessioned 2020-12-14T09:04:40Z
dc.date.available 2020-03-19
dc.date.available 2020-12-14T09:04:40Z
dc.date.issued 2020
dc.description.abstract none zh_TW
dc.description.abstract The frequency and severity of global bleaching events are increasing, due to the rise of anthropogenic CO2 in the atmosphere. As our oceans keep warming up, understanding the mechanisms driving thermal tolerance in reef-building corals is of outstanding importance. In Kenting National Park, southern Taiwan, there is a ‘Variable Site’ (VS) that is influenced by the constant hot-water effluent from a nuclear power plant outlet and temperatures during the summer can be 3 °C higher that at any other site within Kenting. It is also influenced by a monthly upwelling that makes seawater temperature to fluctuate up to 8 °C in one day. In this dissertation, I collected samples of Leptoria phrygia from the VS and from a ‘Stable Site’ (SS) that is not affected by high temperature or high temperature fluctuations within Kenting and compared physiological parameters to elucidate the mechanisms this species has to survive in the VS (Chapters II and III). Results suggest that L. phrygia is a species that presents multi-symbiont association and inter-colony variation in SS: most colonies associated with Cladocopium spp. (stress-sensitive), some colonies had co-dominance between Durusdinium glynnii and Cladocopium spp., and very few associated only with D. glynnii (stress-resistant). Meanwhile in the VS, L. phrygia associated all year long with D. glynnii (>90% dominance). I found out that only those colonies with a co-dominance exhibited temporal variation, and I hypothesize that those co-dominant colonies might be able to survive future scenarios of climate change by modifying the relative abundance of both symbionts. If the environment becomes stressful, it becomes Durusdinium-dominant similar to the current situation in the VS. Furthermore, I performed a reciprocal transplantation experiment with L. phrygia and Porites lutea between both sites, to understand the acclimatisation processes to thermal stress (in the summer) and to high temperature variation throughout the year (Chapter IV). Results indicate that both species have different mechanisms to resist stress and to acclimatise to their new environment. Leptoria phrygia is dependent on the different Symbiodiniaceae association and is able to acclimatise faster than P. lutea, but only if it presents co-dominance of Cladocopium spp. and Durusdinium spp. within the colony. If they are >90% Cladocopium-dominant, then they cannot survive high temperatures in the summer in VS. In contrast, P. lutea acclimatise to the new environment slower and modified both partners physiology to confront changes in the environment. The results of this dissertation increase our knowledge on coral physiology and specifically on the differences between species. Even though both species are able to acclimatise to rapid changes in climate using different mechanisms, it is imperative to change completely our societal dependence on fossil fuels, in order to address the root causes of climate change. en_US
dc.description.sponsorship 生命科學系 zh_TW
dc.identifier G080250009S
dc.identifier.uri http://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=id=%22G080250009S%22.&
dc.identifier.uri http://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/111541
dc.language 英文
dc.subject 珊瑚 zh_TW
dc.subject Leptoria phrygia en_US
dc.subject acclimatisation en_US
dc.subject high temperature variability en_US
dc.subject Kenting en_US
dc.subject Porites lutea en_US
dc.subject Durusdinium en_US
dc.subject Cladocopium en_US
dc.title 墾丁地區密集迷紋珊瑚(Leptoria phrygia)和鐘形微孔珊瑚(Porites lutea)對不同溫度環境的生理差異及馴化過程 zh_TW
dc.title Physiological differences and acclimatisation processes in two scleractinian corals: Leptoria phrygia and Porites lutea, from two sites with contrasting temperature regimes in Kenting National Park, southern Taiwan en_US
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