Miocene Climatic Optimum fungal record and plant-based CREST climatic reconstruction from southern McMurdo Sound, Antarctica
Deep-time palynological studies are necessary to evaluate plant and fungal distribution under warmer-than-present scenarios such as those of the Middle Miocene. Previous palynological studies from southern McMurdo Sound, Antarctica (SMS), have provided unique documentation for Neogene environments i...
Published in: | Journal of Micropalaeontology |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/jm-42-291-2023 https://doaj.org/article/ad01818996824760bdb2f71a361e210e |
id |
ftdoajarticles:oai:doaj.org/article:ad01818996824760bdb2f71a361e210e |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:ad01818996824760bdb2f71a361e210e 2024-01-21T10:01:33+01:00 Miocene Climatic Optimum fungal record and plant-based CREST climatic reconstruction from southern McMurdo Sound, Antarctica M. Pilie M. E. Gibson I. C. Romero N. B. Nuñez Otaño M. J. Pound J. M. K. O'Keefe S. Warny 2023-12-01T00:00:00Z https://doi.org/10.5194/jm-42-291-2023 https://doaj.org/article/ad01818996824760bdb2f71a361e210e EN eng Copernicus Publications https://jm.copernicus.org/articles/42/291/2023/jm-42-291-2023.pdf https://doaj.org/toc/0262-821X https://doaj.org/toc/2041-4978 doi:10.5194/jm-42-291-2023 0262-821X 2041-4978 https://doaj.org/article/ad01818996824760bdb2f71a361e210e Journal of Micropalaeontology, Vol 42, Pp 291-307 (2023) Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/jm-42-291-2023 2023-12-24T01:46:53Z Deep-time palynological studies are necessary to evaluate plant and fungal distribution under warmer-than-present scenarios such as those of the Middle Miocene. Previous palynological studies from southern McMurdo Sound, Antarctica (SMS), have provided unique documentation for Neogene environments in the Ross Sea region during a time of pronounced global warming. The present study builds on these studies and provides a new climate reconstruction using the previously published SMS pollen and plant spore data. Additionally, 44 SMS samples were reanalyzed with a focus on the fungal fraction of the section to evaluate the fungal distribution under warmer than present conditions. The probability-based climate reconstruction technique (CREST) was applied to provide a new plant-based representation of regional paleoclimate for this Miocene Climatic Optimum (MCO) locality. CREST reconstructs a paleoclimate that is warmer and significantly wetter than present in SMS during the MCO, with mean annual precipitation reconstructed at 1147 mm yr −1 (95 % confidence range: 238–2611 mm yr −1 ) and a maximum mean annual temperature of 10.3 ∘ C (95 % confidence range: 2.0–20.2 ∘ C) for the warmest intervals of the MCO. The CREST reconstruction fits within the Cfb Köppen–Geiger climate class during the MCO of SMS. This new reconstruction agrees with previous reconstructions using various geochemical proxies. The fungal palynological analyses yielded surprising results, with only a single morphotype recovered, in low abundance, with concentrations ranging up to 199 fungi per gram of dried sediment. The taxa present belongs to the Apiosporaceae family and are known to be adapted to a wide range of climate and environmental conditions. As fungi are depauperate members of the SMS MCO palynofloras and because the one morphotype recovered is cosmopolitan, using the fungi record to confirm a narrow Köppen–Geiger climate class is impossible. Overall, the study demonstrates refinement of plant-based paleoclimatic reconstructions and sheds ... Article in Journal/Newspaper Antarc* Antarctica McMurdo Sound Ross Sea Directory of Open Access Journals: DOAJ Articles Geiger ENVELOPE(-62.900,-62.900,-64.300,-64.300) McMurdo Sound Ross Sea Journal of Micropalaeontology 42 2 291 307 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 M. Pilie M. E. Gibson I. C. Romero N. B. Nuñez Otaño M. J. Pound J. M. K. O'Keefe S. Warny Miocene Climatic Optimum fungal record and plant-based CREST climatic reconstruction from southern McMurdo Sound, Antarctica |
topic_facet |
Geology QE1-996.5 |
description |
Deep-time palynological studies are necessary to evaluate plant and fungal distribution under warmer-than-present scenarios such as those of the Middle Miocene. Previous palynological studies from southern McMurdo Sound, Antarctica (SMS), have provided unique documentation for Neogene environments in the Ross Sea region during a time of pronounced global warming. The present study builds on these studies and provides a new climate reconstruction using the previously published SMS pollen and plant spore data. Additionally, 44 SMS samples were reanalyzed with a focus on the fungal fraction of the section to evaluate the fungal distribution under warmer than present conditions. The probability-based climate reconstruction technique (CREST) was applied to provide a new plant-based representation of regional paleoclimate for this Miocene Climatic Optimum (MCO) locality. CREST reconstructs a paleoclimate that is warmer and significantly wetter than present in SMS during the MCO, with mean annual precipitation reconstructed at 1147 mm yr −1 (95 % confidence range: 238–2611 mm yr −1 ) and a maximum mean annual temperature of 10.3 ∘ C (95 % confidence range: 2.0–20.2 ∘ C) for the warmest intervals of the MCO. The CREST reconstruction fits within the Cfb Köppen–Geiger climate class during the MCO of SMS. This new reconstruction agrees with previous reconstructions using various geochemical proxies. The fungal palynological analyses yielded surprising results, with only a single morphotype recovered, in low abundance, with concentrations ranging up to 199 fungi per gram of dried sediment. The taxa present belongs to the Apiosporaceae family and are known to be adapted to a wide range of climate and environmental conditions. As fungi are depauperate members of the SMS MCO palynofloras and because the one morphotype recovered is cosmopolitan, using the fungi record to confirm a narrow Köppen–Geiger climate class is impossible. Overall, the study demonstrates refinement of plant-based paleoclimatic reconstructions and sheds ... |
format |
Article in Journal/Newspaper |
author |
M. Pilie M. E. Gibson I. C. Romero N. B. Nuñez Otaño M. J. Pound J. M. K. O'Keefe S. Warny |
author_facet |
M. Pilie M. E. Gibson I. C. Romero N. B. Nuñez Otaño M. J. Pound J. M. K. O'Keefe S. Warny |
author_sort |
M. Pilie |
title |
Miocene Climatic Optimum fungal record and plant-based CREST climatic reconstruction from southern McMurdo Sound, Antarctica |
title_short |
Miocene Climatic Optimum fungal record and plant-based CREST climatic reconstruction from southern McMurdo Sound, Antarctica |
title_full |
Miocene Climatic Optimum fungal record and plant-based CREST climatic reconstruction from southern McMurdo Sound, Antarctica |
title_fullStr |
Miocene Climatic Optimum fungal record and plant-based CREST climatic reconstruction from southern McMurdo Sound, Antarctica |
title_full_unstemmed |
Miocene Climatic Optimum fungal record and plant-based CREST climatic reconstruction from southern McMurdo Sound, Antarctica |
title_sort |
miocene climatic optimum fungal record and plant-based crest climatic reconstruction from southern mcmurdo sound, antarctica |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/jm-42-291-2023 https://doaj.org/article/ad01818996824760bdb2f71a361e210e |
long_lat |
ENVELOPE(-62.900,-62.900,-64.300,-64.300) |
geographic |
Geiger McMurdo Sound Ross Sea |
geographic_facet |
Geiger McMurdo Sound Ross Sea |
genre |
Antarc* Antarctica McMurdo Sound Ross Sea |
genre_facet |
Antarc* Antarctica McMurdo Sound Ross Sea |
op_source |
Journal of Micropalaeontology, Vol 42, Pp 291-307 (2023) |
op_relation |
https://jm.copernicus.org/articles/42/291/2023/jm-42-291-2023.pdf https://doaj.org/toc/0262-821X https://doaj.org/toc/2041-4978 doi:10.5194/jm-42-291-2023 0262-821X 2041-4978 https://doaj.org/article/ad01818996824760bdb2f71a361e210e |
op_doi |
https://doi.org/10.5194/jm-42-291-2023 |
container_title |
Journal of Micropalaeontology |
container_volume |
42 |
container_issue |
2 |
container_start_page |
291 |
op_container_end_page |
307 |
_version_ |
1788691530813276160 |