Staff View
Drivers of phytoplankton dynamics, and corresponding impacts on biogeochemistry, along the West Antarctic Peninsula

Descriptive

TitleInfo
Title
Drivers of phytoplankton dynamics, and corresponding impacts on biogeochemistry, along the West Antarctic Peninsula
Name (type = personal)
NamePart (type = family)
Brown
NamePart (type = given)
Michael
NamePart (type = date)
1985
DisplayForm
Michael Brown
Role
RoleTerm (authority = RULIB); (type = text)
author
Name (type = personal)
NamePart (type = family)
Schofield
NamePart (type = given)
Oscar
DisplayForm
Oscar Schofield
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Bidle
NamePart (type = given)
Kay
DisplayForm
Kay Bidle
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Sherrell
NamePart (type = given)
Robert
DisplayForm
Robert Sherrell
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Marchetti
NamePart (type = given)
Adrian
DisplayForm
Adrian Marchetti
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
School of Graduate Studies
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact); (encoding = w3cdtf); (keyDate = yes)
2020
DateOther (type = degree); (qualifier = exact); (encoding = w3cdtf)
2020-10
Language
LanguageTerm (authority = ISO 639-3:2007); (type = text)
English
Abstract
The West Antarctic Peninsula (WAP) has experienced rapid warming and melting since the mid-20th century. While there is evidence that these environmental drivers are altering the WAP marine food web, there is uncertainty regarding the mechanisms of these changes, and how they will impact the regional carbon cycle. In this dissertation, I examine the drivers of variability in phytoplankton dynamics along the WAP, with a primary focus on diatoms and cryptophytes (the two major phytoplankton groups), and how this variability impacts regional biogeochemistry.

In Chapter 2 (Enhanced oceanic CO2 uptake along the rapidly changing West Antarctic Peninsula), I use a 25-year dataset to examine the coupling between upper ocean stability, phytoplankton dynamics, and oceanic CO2 uptake along the WAP. I demonstrate that greater upper ocean stability drives increased phytoplankton biomass, resulting in greater oceanic CO2 uptake. Diatom assemblages achieve higher biomass and oceanic CO2 uptake than cryptophyte assemblages. Over the past 25 years, in response to changes in sea ice dynamics, there have been significant positive trends in upper ocean stability, phytoplankton biomass, and oceanic CO2 uptake along the WAP.

In Chapter 3 (Low diversity of a key phytoplankton group along the West Antarctic Peninsula), I use a phylogenetic placement approach with a 5-year dataset of DNA sequences to characterize WAP cryptophyte diversity and its drivers to a high taxonomic resolution. I demonstrate that there are just two major WAP cryptophyte taxa that consistently comprise nearly 100% of the cryptophyte community. Variability in the proportion of these two taxa is associated with changes in oceanographic conditions, including temperature, salinity, nutrients, and phytoplankton dynamics. These variables are all predicted to be altered with continued environmental change along the WAP.

In Chapter 4 (Meltwater chemistry of a receding West Antarctic Peninsula glacier), I characterize the chemical composition and discharge dynamics of two WAP glacial meltwater streams. While different in their physical characteristics, I demonstrate that both streams have a similar composition of stable oxygen isotopes of water, which is important for determining regional oceanic freshwater budgets. Additionally, relative to coastal seawater, both streams have high concentrations of trace metals (including iron and copper), and low concentrations of silicate. These high glacial meltwater trace metal concentrations could be important for structuring coastal phytoplankton communities along the WAP.
Subject (authority = local)
Topic
Antarctica
Subject (authority = RUETD)
Topic
Oceanography
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_11020
PhysicalDescription
Form (authority = gmd)
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xii, 132 pages)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Genre (authority = ExL-Esploro)
ETD doctoral
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
Identifier (type = local)
rucore10001600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/t3-kpg7-2m70
Back to the top

Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Brown
GivenName
Michael
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2020-06-21 14:59:15
AssociatedEntity
Name
Michael Brown
Role
Copyright holder
Affiliation
Rutgers University. School of Graduate Studies
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
Back to the top

Technical

RULTechMD (ID = TECHNICAL1)
ContentModel
ETD
OperatingSystem (VERSION = 5.1)
windows xp
CreatingApplication
Version
1.4
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2020-06-21T18:28:07
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2020-06-21T14:28:45
ApplicationName
Mac OS X 10.13.6 Quartz PDFContext
Back to the top
Version 8.5.5
Rutgers University Libraries - Copyright ©2024