Influence of Abiotic Environmental Factors on Physiological Responses and Mixotrophy in Freshwater and Marine Chrysophytes
Global climate change represents one of the greatest threats to biodiversity. Phenomena such as rising surface water temperature, increased UV radiation, and ocean acidification have brought negative impacts to ecosystems and their inhabitants. Sensitive to various abiotic factors, microbial eukaryo...
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fttempleuniv:oai:scholarshare.temple.edu:20.500.12613/10349 2024-09-15T18:02:24+00:00 Influence of Abiotic Environmental Factors on Physiological Responses and Mixotrophy in Freshwater and Marine Chrysophytes Chang, Chia-Mei Sanders, Robert W. Freestone, Amy Cordes, Erik E. Princiotta, Sarah 2024-05 94 pages https://hdl.handle.net/20.500.12613/10349 eng eng Temple University. Libraries http://dx.doi.org/10.34944/dspace/10311 Theses and Dissertations 15601 http://hdl.handle.net/20.500.12613/10349 IN COPYRIGHT- This Rights Statement can be used for an Item that is in copyright. Using this statement implies that the organization making this Item available has determined that the Item is in copyright and either is the rights-holder, has obtained permission from the rights-holder(s) to make their Work(s) available, or makes the Item available under an exception or limitation to copyright (including Fair Use) that entitles it to make the Item available. http://rightsstatements.org/vocab/InC/1.0/ Biology Chrysophyte Environmental changes Eukaryotic microbial ecology Flagellates Mixotrophy Protist Thesis/Dissertation Text 2024 fttempleuniv https://doi.org/20.500.12613/1034910.34944/dspace/10311 2024-07-25T23:30:56Z Global climate change represents one of the greatest threats to biodiversity. Phenomena such as rising surface water temperature, increased UV radiation, and ocean acidification have brought negative impacts to ecosystems and their inhabitants. Sensitive to various abiotic factors, microbial eukaryotic communities in aquatic systems are particularly being affected by these environmental changes. Specifically, warming temperature not only can directly affect plankton through limiting growth and inhibiting physiological processes, but can also indirectly impact these organisms by altering light and nutrient availability via loss of sea ice and changes in thermal stratification in various environments. Mixotrophic chrysophytes are an important lineage of protists that often dominate phytoplanktonic blooms in both freshwater and marine systems. Studies have shown mixotrophic organisms’ nutrient-acquiring strategies are influenced by abiotic environmental factors. Temperature in particular, is known to alter growth rate and bacterivory. In response to rising temperature, mixotrophs can either become more phototrophic or more heterotrophic, depending on species, resulting in changes of their role in aquatic food webs and potentially leading to shifts in overall community composition and structure. The objective of this research is to investigate the influence of different environmental factors on primary production and heterotrophic ingestion in marine and freshwater chrysophytes, providing an understanding on how climate change may alter physiological response and survival, with indicative changes in community structures and food webs. The influence of irradiance, nutrient concentrations, and temperature on mixotrophic responses of the Arctic marine chrysophyte Dinobryon faculiferum was investigated, where our results demonstrated an increase in heterotrophic ingestion in response to rising temperature. We also found bacterivory contributes a major proportion of D. faculiferum’s carbon budget in comparison to primary ... Thesis Climate change Ocean acidification Sea ice TUScholarShare (Temple University) |
institution |
Open Polar |
collection |
TUScholarShare (Temple University) |
op_collection_id |
fttempleuniv |
language |
English |
topic |
Biology Chrysophyte Environmental changes Eukaryotic microbial ecology Flagellates Mixotrophy Protist |
spellingShingle |
Biology Chrysophyte Environmental changes Eukaryotic microbial ecology Flagellates Mixotrophy Protist Chang, Chia-Mei Influence of Abiotic Environmental Factors on Physiological Responses and Mixotrophy in Freshwater and Marine Chrysophytes |
topic_facet |
Biology Chrysophyte Environmental changes Eukaryotic microbial ecology Flagellates Mixotrophy Protist |
description |
Global climate change represents one of the greatest threats to biodiversity. Phenomena such as rising surface water temperature, increased UV radiation, and ocean acidification have brought negative impacts to ecosystems and their inhabitants. Sensitive to various abiotic factors, microbial eukaryotic communities in aquatic systems are particularly being affected by these environmental changes. Specifically, warming temperature not only can directly affect plankton through limiting growth and inhibiting physiological processes, but can also indirectly impact these organisms by altering light and nutrient availability via loss of sea ice and changes in thermal stratification in various environments. Mixotrophic chrysophytes are an important lineage of protists that often dominate phytoplanktonic blooms in both freshwater and marine systems. Studies have shown mixotrophic organisms’ nutrient-acquiring strategies are influenced by abiotic environmental factors. Temperature in particular, is known to alter growth rate and bacterivory. In response to rising temperature, mixotrophs can either become more phototrophic or more heterotrophic, depending on species, resulting in changes of their role in aquatic food webs and potentially leading to shifts in overall community composition and structure. The objective of this research is to investigate the influence of different environmental factors on primary production and heterotrophic ingestion in marine and freshwater chrysophytes, providing an understanding on how climate change may alter physiological response and survival, with indicative changes in community structures and food webs. The influence of irradiance, nutrient concentrations, and temperature on mixotrophic responses of the Arctic marine chrysophyte Dinobryon faculiferum was investigated, where our results demonstrated an increase in heterotrophic ingestion in response to rising temperature. We also found bacterivory contributes a major proportion of D. faculiferum’s carbon budget in comparison to primary ... |
author2 |
Sanders, Robert W. Freestone, Amy Cordes, Erik E. Princiotta, Sarah |
format |
Thesis |
author |
Chang, Chia-Mei |
author_facet |
Chang, Chia-Mei |
author_sort |
Chang, Chia-Mei |
title |
Influence of Abiotic Environmental Factors on Physiological Responses and Mixotrophy in Freshwater and Marine Chrysophytes |
title_short |
Influence of Abiotic Environmental Factors on Physiological Responses and Mixotrophy in Freshwater and Marine Chrysophytes |
title_full |
Influence of Abiotic Environmental Factors on Physiological Responses and Mixotrophy in Freshwater and Marine Chrysophytes |
title_fullStr |
Influence of Abiotic Environmental Factors on Physiological Responses and Mixotrophy in Freshwater and Marine Chrysophytes |
title_full_unstemmed |
Influence of Abiotic Environmental Factors on Physiological Responses and Mixotrophy in Freshwater and Marine Chrysophytes |
title_sort |
influence of abiotic environmental factors on physiological responses and mixotrophy in freshwater and marine chrysophytes |
publisher |
Temple University. Libraries |
publishDate |
2024 |
url |
https://hdl.handle.net/20.500.12613/10349 |
genre |
Climate change Ocean acidification Sea ice |
genre_facet |
Climate change Ocean acidification Sea ice |
op_relation |
http://dx.doi.org/10.34944/dspace/10311 Theses and Dissertations 15601 http://hdl.handle.net/20.500.12613/10349 |
op_rights |
IN COPYRIGHT- This Rights Statement can be used for an Item that is in copyright. Using this statement implies that the organization making this Item available has determined that the Item is in copyright and either is the rights-holder, has obtained permission from the rights-holder(s) to make their Work(s) available, or makes the Item available under an exception or limitation to copyright (including Fair Use) that entitles it to make the Item available. http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/20.500.12613/1034910.34944/dspace/10311 |
_version_ |
1810439863635279872 |