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Acclimation of Ginkgo biloba Photosynthetic Biochemistry Under Elevated Carbon Dioxide: Paleo-proxy and Conservation Consequences

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dc.contributor.advisor Wilson, Jonathan
dc.contributor.author Dougherty, James Fitzmyer
dc.date.accessioned 2021-07-13T17:45:11Z
dc.date.available 2021-07-13T17:45:11Z
dc.date.issued 2021
dc.identifier.uri http://hdl.handle.net/10066/23592
dc.description.abstract Climate change poses an enormous threat to the world's ecosystems (Shukla et. al 2019). As a result, it is important to evaluate the ecological consequences of other climates in Earth's history. A valuable way to approximate paleo-CO2 concentrations is by using plant proxies, such as the Ginkgo biloba stomatal index - paleo-CO2 model (Barlcay and Wing 2016). To determine the reliability of G. biloba as a paleo-CO2 proxy, it is necessary to understand whether G. biloba photosynthetic biochemistry acclimates to elevated CO2. If the biochemistry is significantly different than it is under ambient conditions, researchers will need to reassess the model. We planted three ages of G. biloba in open-top chambers with different CO2 concentrations, measured photosynthetic data using a Li-cor 6400XT, and calculated biochemical parameters utilizing the Plantecophys package in R. These results suggest that the G. biloba paleo-CO2 proxy should not need major modification, since a change in Jmax is less disruptive than a change in Vcmax.
dc.description.sponsorship Bi-College (Haverford and Bryn Mawr Colleges). Department of Environmental Studies
dc.language.iso eng
dc.rights.uri http://creativecommons.org/licenses/by-nc/4.0/
dc.subject.lcsh Paleoclimatology
dc.subject.lcsh Climatic changes
dc.subject.lcsh Carbon dioxide
dc.subject.lcsh Photosynthesis
dc.subject.lcsh Ginkgo
dc.title Acclimation of Ginkgo biloba Photosynthetic Biochemistry Under Elevated Carbon Dioxide: Paleo-proxy and Conservation Consequences
dc.type Thesis
dc.rights.access Dark Archive until 2031-01-01, afterwards Bi-College users only.


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