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Phytoplankton Molecular Physiology A...

Lin, Yuan Yu Johnson,

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Phytoplankton Molecular Physiology Associated With Upwelling Dynamics Through Field and Laboratory Studies /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Phytoplankton Molecular Physiology Associated With Upwelling Dynamics Through Field and Laboratory Studies // Yuan Yu Johnson Lin.
Author:	Lin, Yuan Yu Johnson,
Description:	1 electronic resource (178 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
Contained By:	Dissertations Abstracts International86-02B.
Subject:	Biological oceanography. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31334790
ISBN:	9798383687581

Phytoplankton Molecular Physiology Associated With Upwelling Dynamics Through Field and Laboratory Studies /
Lin, Yuan Yu Johnson,

Phytoplankton Molecular Physiology Associated With Upwelling Dynamics Through Field and Laboratory Studies /Yuan Yu Johnson Lin. - 1 electronic resource (178 pages)

Source: Dissertations Abstracts International, Volume: 86-02, Section: B.

The California Current System (CCS), like other Eastern boundary upwelling currents (EBUC), contribute a disproportionate amount of new and export production relative to open oceans. Influenced by equatorward winds and the Ekman transport, surface waters in the CCS are advected offshore and replaced by cold, nutrient-rich bottom waters. These episodic upwelling cycles - also known as the upwelling conveyor belt cycle (UCBC) - bring about extensive phytoplankton blooms dominated by diatoms, and provide for trophic interactions vital to the food web and local fisheries. However, our understanding of phytoplankton assemblages and their response to the UCBC remain largely understudied, and climate change presents further uncertainties to this knowledge gap. This dissertation aims to offer insight into the composition and biology of the photosynthetic microbes within the coastal waters of the CCS, and explore the complexities of their interactions through both physiological and molecular lenses. To achieve this, I conducted field (1) transect surveys and (2) incubation experiments in addition to (3) culture-based simulation experiments of isolate diatoms. Then, using a combination of environmental measurements, isotope uptake kinetics, and omics analyses, I characterized the intricate biotic and abiotic relationships between the organisms and this multifaceted upwelling cycle. An overarching theme emerged during my analyses: phytoplankton taxonomic groups employ different molecular strategies throughout the UCBC, which (1) can be temporally and spatially compartmentalized into varying environmental conditions, (2) may not be the only abiotic process influencing community structure and biological response, and (3) can elicit proactive transcriptomic patterns in diatom seed populations that facilitate their rapid growth, dominance, and nutrient uptake efficiency during the initial phases of an upwelling event. Additional work exploring these concepts can be further improved by in situ and laboratory experiments that focus on refining the taxonomic resolution of physiological measurements to complement the evolving molecular-level analyses of these marine microbes. Through my interpretations, I hope to piece together the ecological puzzles surrounding these biological hotspots and contribute some understanding of the underlying mechanisms by which algal communities use to adapt to the dynamic CCS. Ultimately, my studies may contribute important information to models and subsequent investigations characterizing EBUCs, especially in relation to future oceans impacted by anthropogenic climate change.

English

ISBN: 9798383687581Subjects--Topical Terms:

2122748
Biological oceanography.
Subjects--Index Terms:

California Current System

Phytoplankton Molecular Physiology Associated With Upwelling Dynamics Through Field and Laboratory Studies /
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300 $a 1 electronic resource (178 pages)
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500 $a Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
500 $a Advisors: Marchetti, Adrian Committee members: Septer, Alecia; Seim, Harvey; Alperin, Marc; Gifford, Scott.
502 $b Ph.D. $c The University of North Carolina at Chapel Hill $d 2024.
520 $a The California Current System (CCS), like other Eastern boundary upwelling currents (EBUC), contribute a disproportionate amount of new and export production relative to open oceans. Influenced by equatorward winds and the Ekman transport, surface waters in the CCS are advected offshore and replaced by cold, nutrient-rich bottom waters. These episodic upwelling cycles - also known as the upwelling conveyor belt cycle (UCBC) - bring about extensive phytoplankton blooms dominated by diatoms, and provide for trophic interactions vital to the food web and local fisheries. However, our understanding of phytoplankton assemblages and their response to the UCBC remain largely understudied, and climate change presents further uncertainties to this knowledge gap. This dissertation aims to offer insight into the composition and biology of the photosynthetic microbes within the coastal waters of the CCS, and explore the complexities of their interactions through both physiological and molecular lenses. To achieve this, I conducted field (1) transect surveys and (2) incubation experiments in addition to (3) culture-based simulation experiments of isolate diatoms. Then, using a combination of environmental measurements, isotope uptake kinetics, and omics analyses, I characterized the intricate biotic and abiotic relationships between the organisms and this multifaceted upwelling cycle. An overarching theme emerged during my analyses: phytoplankton taxonomic groups employ different molecular strategies throughout the UCBC, which (1) can be temporally and spatially compartmentalized into varying environmental conditions, (2) may not be the only abiotic process influencing community structure and biological response, and (3) can elicit proactive transcriptomic patterns in diatom seed populations that facilitate their rapid growth, dominance, and nutrient uptake efficiency during the initial phases of an upwelling event. Additional work exploring these concepts can be further improved by in situ and laboratory experiments that focus on refining the taxonomic resolution of physiological measurements to complement the evolving molecular-level analyses of these marine microbes. Through my interpretations, I hope to piece together the ecological puzzles surrounding these biological hotspots and contribute some understanding of the underlying mechanisms by which algal communities use to adapt to the dynamic CCS. Ultimately, my studies may contribute important information to models and subsequent investigations characterizing EBUCs, especially in relation to future oceans impacted by anthropogenic climate change.
546 $a English
590 $a School code: 0153
650 4 $a Biological oceanography. $3 2122748
650 4 $a Bioinformatics. $3 553671
650 4 $a Molecular biology. $3 517296
650 4 $a Ecology. $3 516476
650 4 $a Climate change. $2 bicssc $3 2079509
653 $a California Current System
653 $a Phytoplankton
653 $a Molecular physiology
653 $a Upwelling dynamics
653 $a Laboratory
690 $a 0416
690 $a 0715
690 $a 0307
690 $a 0404
690 $a 0329
710 2 $a The University of North Carolina at Chapel Hill. $b Marine Sciences. $e degree granting institution. $3 3816891
720 1 $a Marchetti, Adrian $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-02B.
790 $a 0153
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31334790