Ecophysiological, morphological and genetic differences between two Southern Ocean morphotypes of the coccolithophorid Emiliania huxleyi (Lohm.) Hay and Mohler (Haptophyta) ...
The coccolithophorid Emiliania huxleyi has long been considered a cosmopolitan species occurring from the tropics to polar waters. This keystone marine phytoplankton through its shedding of delicate and intricately beautiful calcium carbonate coccoliths is a major contributor to the global geochemic...
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| Format: | Thesis |
| Language: | unknown |
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University Of Tasmania
2023
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| Online Access: | https://dx.doi.org/10.25959/23234105.v1 https://figshare.utas.edu.au/articles/thesis/Ecophysiological_morphological_and_genetic_differences_between_two_Southern_Ocean_morphotypes_of_the_coccolithophorid_Emiliania_huxleyi_Lohm_Hay_and_Mohler_Haptophyta_/23234105/1 |
| Summary: | The coccolithophorid Emiliania huxleyi has long been considered a cosmopolitan species occurring from the tropics to polar waters. This keystone marine phytoplankton through its shedding of delicate and intricately beautiful calcium carbonate coccoliths is a major contributor to the global geochemical cycling of carbon and is attracting widespread interest as to whether it will increase photosynthesis or reduce calcification in response to current climate change. To gain an understanding of the ecology of little studied Southern Hemisphere populations of E. huxleyi 423 single cell isolates were established from 10 sampling locations encompassing 5 ocean currents/systems around southern Australia, Tasmania and the Southern Ocean, including below the Antarctic Polar Front. Two distinct coccolith morphotypes were recognised which remained stable during long-term culturing: type A and type B/C. DNA was extracted from these strains and each was amplified with 8 microsatellite markers developed for the species. ... |
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