Comment on egusphere-2024-2405 DOI Creative Commons

Brian Huber

Published: Sept. 3, 2024

Abstract. Planktic foraminifera are key producers of pelagic carbonate, and their shell weight is suggested to represent the environment in which they calcify. However, there debate about use size-normalised (SNW) as a proxy, some authors invoke carbonate system control on calcification (and by extension SNW pCO2 proxy), while others suggest that species optimum conditions, nutrient concentration, or temperature drive weight. To better understand its we investigate what drives whether discrepancies proposed due differing data collection methodologies and/or regionally different drivers. We integrate new published with environmental hindcast extracted from CMIP6 modelling suite. Using Bayesian regression modelling, find alone cannot explain variability across species. Although physiology likely modulates response environment, little evidence unifying driver at ecogroup-level. Instead, identify species-specific responses associated drivers including (but not limited to) system, between ocean basins. hypothesise this partly influenced cryptic regional phenotypic plasticity well understood changes weight, such thickness calcite deposited during species’ reproductive phase. Consequently, proxy multiple should be used parallel reduce uncertainty carefully considered. strongly encourage testing calibration – relationships.

Language: Английский

Biogeography and genetic diversity of freshwater diatoms: The potential of large combined rbcL metabarcoding datasets DOI
Javier Pérez‐Burillo, David G. Mann, Rosa Trobajo

et al.

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 966, P. 178727 - 178727

Published: Feb. 1, 2025

Language: Английский

Citations

0
What controls planktic foraminiferal calcification? DOI Creative Commons
Ruby Barrett, Joost de Vries, Daniela N. Schmidt

et al.

Biogeosciences, Journal Year: 2025, Volume and Issue: 22(3), P. 791 - 807

Published: Feb. 12, 2025

Abstract. Planktic foraminifera are key producers of pelagic carbonate, and their shell weight is suggested to have been influenced by the environment in which they calcify. However, there debate about use size-normalised (SNW) as a proxy, some authors invoke carbonate system control on calcification (and extension SNW pCO2 proxy), while others suggest that species optimum conditions, nutrient concentration, or temperature drive weight. To better understand this we investigate what drives whether discrepancies proposed due differing data collection methodologies and/or regionally different drivers. We integrate new published with environmental hindcast from CMIP6 modelling suite. Using Bayesian regression modelling, find alone does not explain variability across species. Although physiology likely modulates response environment, little evidence unifying driver at ecogroup level. Instead, identify species-specific responses associated drivers including (but limited to) system, between ocean basins. hypothesise partly cryptic regional phenotypic plasticity changes well understood, such thickness calcite deposited during species' reproductive phases. Consequently, proxy multiple should be used parallel reduce uncertainty carefully considered. strongly encourage testing calibration pCO2–SNW relationships.

Language: Английский

Citations

0
Exploring macroevolutionary links in multi-species planktonic foraminiferal Mg∕Ca and δ18O from 15 Ma to recent DOI Creative Commons
Flavia Boscolo‐Galazzo, David Evans,

Elaine Mawbey

et al.

Biogeosciences, Journal Year: 2025, Volume and Issue: 22(4), P. 1095 - 1113

Published: Feb. 28, 2025

Abstract. The ratio of the trace element Mg over Ca (Mg/Ca) and oxygen isotopic composition (δ18O) foraminiferal calcite are widely employed for reconstructing past ocean temperatures, although geochemical signals also influenced by several other factors that vary temporally spatially. Here, we analyse a global dataset Mg/Ca δ18O data 59 middle Miocene to recent species planktonic foraminifera from wide range depth habitats, many which have never been analysed before Mg/Ca. We investigate extent covary through time space identify sources mismatch between two proxies. Once adjusted long-term non-thermal factors, overall positively correlated in way consistent with temperature being dominant controller both across different species, including deep dwellers. However, systematic offsets values, multispecies calibrations should be applied caution. can track appearance such ancestor-descendent last 15 Myr propose emergence these may expression evolutionary innovations. find virtually all Mg/Ca- δ18O-derived temperatures commonly used genera Globigerinoides Trilobatus within uncertainty each other, highlighting utility paleoceanographic reconstructions. Our results highlight potential leveraging information lineages improve sea surface reconstruction Cenozoic.

Language: Английский

Citations

0
BFR2: a curated ribosomal reference dataset for benthic foraminifera DOI Creative Commons
Maria Holzmann, Ngoc‐Loi Nguyen, Inés Barrenechea Angeles

et al.

Scientific Data, Journal Year: 2024, Volume and Issue: 11(1)

Published: Nov. 27, 2024

Abstract Benthic foraminifera are one of the major groups marine protists that also occur in freshwater and terrestrial habitats. They widely used to monitor current past environmental conditions. Over last three decades, thousands DNA sequences have been obtained from benthic foraminiferal isolates. The results this long-term effort compiled here form first curated ribosomal reference dataset (BFR2). present contains over 5000 a fragment 18S rDNA gene, which is recognized as barcode foraminifera. represent 279 species 204 genera belonging 91 families. Thirteen percent these not assigned any morphologically described group may new science. Furthermore, forty-five previously published. BFR 2 aims collect all barcodes provide much-needed for rapidly developing field molecular studies.

Language: Английский

Citations

3
What controls planktic foraminiferal calcification? DOI Creative Commons
Ruby Barrett, Joost de Vries, Daniela N. Schmidt

et al.

Published: Aug. 5, 2024

Abstract. Planktic foraminifera are key producers of pelagic carbonate, and their shell weight is suggested to represent the environment in which they calcify. However, there debate about use size-normalised (SNW) as a proxy, some authors invoke carbonate system control on calcification (and by extension SNW pCO2 proxy), while others suggest that species optimum conditions, nutrient concentration, or temperature drive weight. To better understand its we investigate what drives whether discrepancies proposed due differing data collection methodologies and/or regionally different drivers. We integrate new published with environmental hindcast extracted from CMIP6 modelling suite. Using Bayesian regression modelling, find alone cannot explain variability across species. Although physiology likely modulates response environment, little evidence unifying driver at ecogroup-level. Instead, identify species-specific responses associated drivers including (but not limited to) system, between ocean basins. hypothesise this partly influenced cryptic regional phenotypic plasticity well understood changes weight, such thickness calcite deposited during species’ reproductive phase. Consequently, proxy multiple should be used parallel reduce uncertainty carefully considered. strongly encourage testing calibration – relationships.

Language: Английский

Citations

1
Past foraminiferal acclimatization capacity is limited during future warming DOI Creative Commons
Rui Ying, Fanny Monteiro, Jamie D. Wilson

et al.

Nature, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Climate change affects marine organisms, causing migrations, biomass reduction and extinctions

Language: Английский

Citations

1
Mg/Ca and δ18O in multiple species of planktonic foraminifera from 15 Ma to Recent DOI Creative Commons
Flavia Boscolo‐Galazzo, David Evans,

Elaine Mawbey

et al.

Published: June 27, 2024

Abstract. The ratio of the trace element Mg over Ca (Mg/Ca) and oxygen isotopic composition (δ18O) foraminiferal calcite are widely employed for reconstructing past ocean temperatures, although geochemical signals also influenced by several other factors that vary temporally spatially. Here, we analyze a global dataset Mg/Ca δ18O data 59 middle Miocene to Holocene species planktonic foraminifera from wide range depth habitats, many which have never been analyzed before Mg/Ca. We investigate extent covary through time space, identify sources mismatch between two proxies. Once adjusted long term non-thermal factors, overall positively correlated in way consistent with temperature being dominant controller both space across different species, including deep-dwellers. However, systematic offsets values, multispecies calibrations should be applied caution. can track appearance such ancestor-descendent last 15 million years propose emergence these may expression evolutionary innovations. find virtually all δ18O-derived temperatures commonly used genera Globigerinoides Trilobatus within uncertainty each other, highlighting utility paleoceanographic reconstructions. Our results highlight potential leveraging information lineages improve sea surface reconstruction Cenozoic.

Language: Английский

Citations

0
Comment on egusphere-2024-2405 DOI Creative Commons

Brian Huber

Published: Sept. 3, 2024

Abstract. Planktic foraminifera are key producers of pelagic carbonate, and their shell weight is suggested to represent the environment in which they calcify. However, there debate about use size-normalised (SNW) as a proxy, some authors invoke carbonate system control on calcification (and by extension SNW pCO2 proxy), while others suggest that species optimum conditions, nutrient concentration, or temperature drive weight. To better understand its we investigate what drives whether discrepancies proposed due differing data collection methodologies and/or regionally different drivers. We integrate new published with environmental hindcast extracted from CMIP6 modelling suite. Using Bayesian regression modelling, find alone cannot explain variability across species. Although physiology likely modulates response environment, little evidence unifying driver at ecogroup-level. Instead, identify species-specific responses associated drivers including (but not limited to) system, between ocean basins. hypothesise this partly influenced cryptic regional phenotypic plasticity well understood changes weight, such thickness calcite deposited during species’ reproductive phase. Consequently, proxy multiple should be used parallel reduce uncertainty carefully considered. strongly encourage testing calibration – relationships.

Language: Английский

Citations

0