Caitlin Livsey - Academia.edu (original) (raw)

Papers by Caitlin Livsey

Research paper thumbnail of In situ Magnesium/Calcium (Mg/Ca) and oxygen isotope (d18O) measurements in Neogloboquadrina pachyderma shells collected in 1999 by a MultiNet tow from different depth intervals in the Fram Strait

PANGAEA, Sep 7, 2021

This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera N... more This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera Neogloboquadrina pachyderma sinistral collected in April 2006 and April 2007 from two sediment traps moored in the Irminger Sea (IRM-3, 59°14.86'North (N), 39°39.47'West (W) and IRM-4, 59°14.85'N, 39°39.47'W). Individual shells were analyzed in situ for their magnesium/calcium (Mg/Ca) ratios by Laser Ablation Inductively Coupled Mass Spectrometry (LA-ICP-MS), and for their stable oxygen isotope composition (d18O) by secondary ion mass spectrometry (SIMS). Hydrographic measurements reveal that the water column at sample location is isothermal and isohaline during the month prior to collection. The purpose of this project was to determine potential differences in the Mg/Ca or d18O composition of the lamellar calcite, formed and the upper water column, and the crust calcite, precipitated in deeper waters but at the same temperature and salinity than the lamellar calcite. Corresponding publication: Livsey, C.M., Kozdon, R., Bauch, D., Brummer, G.-J.A., Jonkers, L., Orland, I., Hill, T.M., Spero, H.J., 2020. High-resolution Mg/Ca and d18O patterns in modern Neogloboquadrina pachyderma from the Fram Strait and Irminger Sea. Paleoceanography and Paleoclimatology, 35(9): e2020PA003969.doi:10.18739/A2319S316.

Research paper thumbnail of A review of Holocene climate and oceanography of the Western United States and Northeast Pacific

AGU Fall Meeting Abstracts, Dec 1, 2019

Research paper thumbnail of In situ oxygen isotope analyses (d18O) by SIMS in individual N. pachyderma shells from plankton tows deployed in the Fram Strait

Research paper thumbnail of Oxygen isotope analyses (d18O) by gas source mass spectrometry in pooled N. pachyderma shells from plankton tows deployed in the Fram Strait

Research paper thumbnail of In situ d18O analyses by SIMS in N. pachyderma shells from Irminger Sea sediment traps

Research paper thumbnail of In Situ Magnesium Calcium Analyses by La Icp MS in Individual N Pachyderma Shells from Plankton Tows Deployed in the Fram Strait

Research paper thumbnail of In situ Magnesium/Calcium (Mg/Ca) and oxygen isotope (d18O) measurements in Neogloboquadrina pachyderma shells collected in 2006 and 2007 in sediment traps moored in the Irminger Sea

This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera N... more This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera Neogloboquadrina pachyderma sinistral collected in April 2006 and April 2007 from two sediment traps moored in the Irminger Sea (IRM-3, 59°14.86'North (N), 39°39.47'West (W) and IRM-4, 59°14.85'N, 39°39.47'W). Individual shells were analyzed in situ for their magnesium/calcium (Mg/Ca) ratios by Laser Ablation Inductively Coupled Mass Spectrometry (LA-ICP-MS), and for their stable oxygen isotope composition (d18O) by secondary ion mass spectrometry (SIMS). Hydrographic measurements reveal that the water column at sample location is isothermal and isohaline during the month prior to collection. The purpose of this project was to determine potential differences in the Mg/Ca or d18O composition of the lamellar calcite, formed and the upper water column, and the crust calcite, precipitated in deeper waters but at the same temperature and salinity than the lamellar calcite. Corr...

Research paper thumbnail of Neogloboquadrina pachyderma geochemistry data from sediment traps in the Irminger Sea, 2006

This dataset includes geochemistry measurements is from Neogloboquadrina pachyderma collected in ... more This dataset includes geochemistry measurements is from Neogloboquadrina pachyderma collected in April 2006 from a sediment trap in the Irminger Sea (sites IRM-3 and IRM-4). Included are single shell magnesium/calcium (Mg/Ca) results, as well as secondary ion mass spectrometry (SIMS) stable oxygen isotope (d18O) spots on single shells. Hydrographic measurements reveal the study area to be isothermal and isohaline during the month prior to collection. The purpose of project was to determine if there is any geochemical differences in Mg/Ca or d18O between the crust and ontogenetic calcite from shells that grew in isothermal/isohaline waters.

Research paper thumbnail of Data for: The planktonic foraminiferal response to the Paleocene Eocene Thermal Maximum on the Atlantic Coastal Plain

Table S1. Table of samples and full species counts for all BR and CD samples (including the disso... more Table S1. Table of samples and full species counts for all BR and CD samples (including the dissolution zone). Counts are number of individuals counted in each sample. For totals <200, one full picking tray was counted. Separation of tables denote location of CIE based on bulk carbonate δ13C. Table S2. Summary of diversity, % fragmentation, and P/B ratios (presented in %) based on counts at CamDor and Bass River. Pre-CIE and CIE samples noted. Table S3. Table of samples and species groups for Bass River and CamDor samples that were included in the multivariate analysis. Counts are number of individuals from each species group counted in each sample. Table S4. Table of sample depths that correspond to the sample numbers in Figure 9 for CamDor, Bass River, and Site 1209. Depths are in meters.

Research paper thumbnail of Curtailing Institutional Racism in an Earth and Planetary Sciences Department

Geological Society of America Abstracts with Programs, 2020

Research paper thumbnail of Asexual Reproduction in the Planktic Foraminifer Neogloboquadrina Pachyderma and Morphological and Trace Element Variability in the Resulting Offspring

Research paper thumbnail of High‐Resolution Mg/Ca and δ 18 O Patterns in Modern Neogloboquadrina pachyderma From the Fram Strait and Irminger Sea

Paleoceanography and Paleoclimatology, 2020

 We compare micron-scale geochemical results on modern N. pachyderma to the hydrographic informa... more  We compare micron-scale geochemical results on modern N. pachyderma to the hydrographic information from the water in which the shells were collected  We propose a new Mg/Ca to temperature relationship for N. pachyderma lamellar calcite  Our data suggest that there is no difference in the sensitivity of stable oxygen isotopes to temperature or salinity between the crust and lamellar calcite of N. pachyderma

Research paper thumbnail of Holocene climate and oceanography of the coastal Western United States and California Current System

Research paper thumbnail of Extensive morphological variability in asexually produced planktic foraminifera

Science Advances, 2020

Marine protists are integral to the structure and function of pelagic ecosystems and marine carbo... more Marine protists are integral to the structure and function of pelagic ecosystems and marine carbon cycling, with rhizarian biomass alone accounting for more than half of all mesozooplankton in the oligotrophic oceans. Yet, understanding how their environment shapes diversity within species and across taxa is limited by a paucity of observations of heritability and life history. Here, we present observations of asexual reproduction, morphologic plasticity, and ontogeny in the planktic foraminifer Neogloboquadrina pachyderma in laboratory culture. Our results demonstrate that planktic foraminifera reproduce both sexually and asexually and demonstrate extensive phenotypic plasticity in response to nonheritable factors. These two processes fundamentally explain the rapid spatial and temporal response of even imperceptibly low populations of planktic foraminifera to optimal conditions and the diversity and ubiquity of these species across the range of environmental conditions that occur ...

Research paper thumbnail of Patterns of Trace Element Geochemistry in Cultured Neogloboquadrina Pachyderma Crust Calcite

Geological Society of America Abstracts with Programs, 2020

Research paper thumbnail of The planktonic foraminiferal response to the Paleocene-Eocene thermal maximum on the Atlantic coastal plain

Marine Micropaleontology, 2018

Research paper thumbnail of Mg/Ca analyses by LA-ICP-MS in N. pachyderma shells from Irminger Sea sediment traps

Research paper thumbnail of In situ Magnesium/Calcium (Mg/Ca) and oxygen isotope (d18O) measurements in Neogloboquadrina pachyderma shells collected in 1999 by a MultiNet tow from different depth intervals in the Fram Strait

PANGAEA, Sep 7, 2021

This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera N... more This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera Neogloboquadrina pachyderma sinistral collected in April 2006 and April 2007 from two sediment traps moored in the Irminger Sea (IRM-3, 59°14.86'North (N), 39°39.47'West (W) and IRM-4, 59°14.85'N, 39°39.47'W). Individual shells were analyzed in situ for their magnesium/calcium (Mg/Ca) ratios by Laser Ablation Inductively Coupled Mass Spectrometry (LA-ICP-MS), and for their stable oxygen isotope composition (d18O) by secondary ion mass spectrometry (SIMS). Hydrographic measurements reveal that the water column at sample location is isothermal and isohaline during the month prior to collection. The purpose of this project was to determine potential differences in the Mg/Ca or d18O composition of the lamellar calcite, formed and the upper water column, and the crust calcite, precipitated in deeper waters but at the same temperature and salinity than the lamellar calcite. Corresponding publication: Livsey, C.M., Kozdon, R., Bauch, D., Brummer, G.-J.A., Jonkers, L., Orland, I., Hill, T.M., Spero, H.J., 2020. High-resolution Mg/Ca and d18O patterns in modern Neogloboquadrina pachyderma from the Fram Strait and Irminger Sea. Paleoceanography and Paleoclimatology, 35(9): e2020PA003969.doi:10.18739/A2319S316.

Research paper thumbnail of A review of Holocene climate and oceanography of the Western United States and Northeast Pacific

AGU Fall Meeting Abstracts, Dec 1, 2019

Research paper thumbnail of In situ oxygen isotope analyses (d18O) by SIMS in individual N. pachyderma shells from plankton tows deployed in the Fram Strait

Research paper thumbnail of Oxygen isotope analyses (d18O) by gas source mass spectrometry in pooled N. pachyderma shells from plankton tows deployed in the Fram Strait

Research paper thumbnail of In situ d18O analyses by SIMS in N. pachyderma shells from Irminger Sea sediment traps

Research paper thumbnail of In Situ Magnesium Calcium Analyses by La Icp MS in Individual N Pachyderma Shells from Plankton Tows Deployed in the Fram Strait

Research paper thumbnail of In situ Magnesium/Calcium (Mg/Ca) and oxygen isotope (d18O) measurements in Neogloboquadrina pachyderma shells collected in 2006 and 2007 in sediment traps moored in the Irminger Sea

This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera N... more This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera Neogloboquadrina pachyderma sinistral collected in April 2006 and April 2007 from two sediment traps moored in the Irminger Sea (IRM-3, 59°14.86'North (N), 39°39.47'West (W) and IRM-4, 59°14.85'N, 39°39.47'W). Individual shells were analyzed in situ for their magnesium/calcium (Mg/Ca) ratios by Laser Ablation Inductively Coupled Mass Spectrometry (LA-ICP-MS), and for their stable oxygen isotope composition (d18O) by secondary ion mass spectrometry (SIMS). Hydrographic measurements reveal that the water column at sample location is isothermal and isohaline during the month prior to collection. The purpose of this project was to determine potential differences in the Mg/Ca or d18O composition of the lamellar calcite, formed and the upper water column, and the crust calcite, precipitated in deeper waters but at the same temperature and salinity than the lamellar calcite. Corr...

Research paper thumbnail of Neogloboquadrina pachyderma geochemistry data from sediment traps in the Irminger Sea, 2006

This dataset includes geochemistry measurements is from Neogloboquadrina pachyderma collected in ... more This dataset includes geochemistry measurements is from Neogloboquadrina pachyderma collected in April 2006 from a sediment trap in the Irminger Sea (sites IRM-3 and IRM-4). Included are single shell magnesium/calcium (Mg/Ca) results, as well as secondary ion mass spectrometry (SIMS) stable oxygen isotope (d18O) spots on single shells. Hydrographic measurements reveal the study area to be isothermal and isohaline during the month prior to collection. The purpose of project was to determine if there is any geochemical differences in Mg/Ca or d18O between the crust and ontogenetic calcite from shells that grew in isothermal/isohaline waters.

Research paper thumbnail of Data for: The planktonic foraminiferal response to the Paleocene Eocene Thermal Maximum on the Atlantic Coastal Plain

Table S1. Table of samples and full species counts for all BR and CD samples (including the disso... more Table S1. Table of samples and full species counts for all BR and CD samples (including the dissolution zone). Counts are number of individuals counted in each sample. For totals <200, one full picking tray was counted. Separation of tables denote location of CIE based on bulk carbonate δ13C. Table S2. Summary of diversity, % fragmentation, and P/B ratios (presented in %) based on counts at CamDor and Bass River. Pre-CIE and CIE samples noted. Table S3. Table of samples and species groups for Bass River and CamDor samples that were included in the multivariate analysis. Counts are number of individuals from each species group counted in each sample. Table S4. Table of sample depths that correspond to the sample numbers in Figure 9 for CamDor, Bass River, and Site 1209. Depths are in meters.

Research paper thumbnail of Curtailing Institutional Racism in an Earth and Planetary Sciences Department

Geological Society of America Abstracts with Programs, 2020

Research paper thumbnail of Asexual Reproduction in the Planktic Foraminifer Neogloboquadrina Pachyderma and Morphological and Trace Element Variability in the Resulting Offspring

Research paper thumbnail of High‐Resolution Mg/Ca and δ 18 O Patterns in Modern Neogloboquadrina pachyderma From the Fram Strait and Irminger Sea

Paleoceanography and Paleoclimatology, 2020

 We compare micron-scale geochemical results on modern N. pachyderma to the hydrographic informa... more  We compare micron-scale geochemical results on modern N. pachyderma to the hydrographic information from the water in which the shells were collected  We propose a new Mg/Ca to temperature relationship for N. pachyderma lamellar calcite  Our data suggest that there is no difference in the sensitivity of stable oxygen isotopes to temperature or salinity between the crust and lamellar calcite of N. pachyderma

Research paper thumbnail of Holocene climate and oceanography of the coastal Western United States and California Current System

Research paper thumbnail of Extensive morphological variability in asexually produced planktic foraminifera

Science Advances, 2020

Marine protists are integral to the structure and function of pelagic ecosystems and marine carbo... more Marine protists are integral to the structure and function of pelagic ecosystems and marine carbon cycling, with rhizarian biomass alone accounting for more than half of all mesozooplankton in the oligotrophic oceans. Yet, understanding how their environment shapes diversity within species and across taxa is limited by a paucity of observations of heritability and life history. Here, we present observations of asexual reproduction, morphologic plasticity, and ontogeny in the planktic foraminifer Neogloboquadrina pachyderma in laboratory culture. Our results demonstrate that planktic foraminifera reproduce both sexually and asexually and demonstrate extensive phenotypic plasticity in response to nonheritable factors. These two processes fundamentally explain the rapid spatial and temporal response of even imperceptibly low populations of planktic foraminifera to optimal conditions and the diversity and ubiquity of these species across the range of environmental conditions that occur ...

Research paper thumbnail of Patterns of Trace Element Geochemistry in Cultured Neogloboquadrina Pachyderma Crust Calcite

Geological Society of America Abstracts with Programs, 2020

Research paper thumbnail of The planktonic foraminiferal response to the Paleocene-Eocene thermal maximum on the Atlantic coastal plain

Marine Micropaleontology, 2018

Research paper thumbnail of Mg/Ca analyses by LA-ICP-MS in N. pachyderma shells from Irminger Sea sediment traps