Evaluating Fungal Population Response to the Miocene Climatic Optimum: High-Resolution Palynological Insights from the South China Sea and McMurdo Sound, Antarctica
Fungi play key and specific roles in ecosystems, specifically as many have restricted geographic distributions, known host/substrate preferences, and are important local environmental indicators due to their short dispersal distances. This study of fossil fungi from a time interval of pronounced glo...
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ftlouisianastuir:oai:digitalcommons.lsu.edu:gradschool_theses-6834 2023-06-11T04:04:20+02:00 Evaluating Fungal Population Response to the Miocene Climatic Optimum: High-Resolution Palynological Insights from the South China Sea and McMurdo Sound, Antarctica Pilie, Mallory 2023-04-05T07:00:00Z application/pdf https://digitalcommons.lsu.edu/gradschool_theses/5750 https://digitalcommons.lsu.edu/context/gradschool_theses/article/6834/viewcontent/Evaluating_Fungal_Population_Response_to_the_Miocene_Climatic_Opt.pdf unknown LSU Digital Commons https://digitalcommons.lsu.edu/gradschool_theses/5750 https://digitalcommons.lsu.edu/context/gradschool_theses/article/6834/viewcontent/Evaluating_Fungal_Population_Response_to_the_Miocene_Climatic_Opt.pdf LSU Master's Theses MCO MMCO fungi FiaWW palynology paleoclimate Ross Sea Climate Earth Sciences Geochemistry Geology Paleobiology Physical Sciences and Mathematics text 2023 ftlouisianastuir 2023-05-28T18:56:04Z Fungi play key and specific roles in ecosystems, specifically as many have restricted geographic distributions, known host/substrate preferences, and are important local environmental indicators due to their short dispersal distances. This study of fossil fungi from a time interval of pronounced global warming, the Miocene Climatic Optimum (MCO), allows analysis of fungal response to an analogue for future climate change scenarios. The research presented herein is part of a larger project, Fungi in a Warmer World (FiaWW), which is using globally-distributed sediment samples to provide foundational information on fungal community distribution patterns and will provide the first fungi-based climatological reconstructions for this time period. A probability-based climate reconstruction technique (CREST) provides an accurate plant-based representation of paleoclimate for each MCO locality studied and acts as an external control for the fungi-based paleoclimate reconstructions proposed herein. For this thesis, 27 samples from middle Miocene cored intervals in the South China Sea (SCS) and 44 samples from McMurdo Sound, Antarctica (SMS) are studied. Although diagenesis likely caused significant impacts to the SCS MCO samples, the fungal assemblage present immediately following the MCO indicates a Köppen–Geiger climate class characterized by tropical to temperate conditions. According to CREST, the reconstructed MCO climate for the nearest landmass to the SCS study site is warmer and drier during the winter, when compared to modern-day climate, with precipitation during the MCO being only 37% of modern-day levels. Fungi are depauperate members of the SMS MCO palynoflora, with a single morphotype present in low abundance and maximum concentration ranging only from 72 to 199 fungi per gram of dried sediments. Apiosporaceae fungi are cosmopolitan and show taxa present during the MCO in Antarctica adapt to a wide range of climate and environmental conditions. CREST reconstructs a warmer and significantly wetter than ... Text Antarc* Antarctica McMurdo Sound Ross Sea LSU Digital Commons (Louisiana State University) Ross Sea McMurdo Sound Geiger ENVELOPE(-62.900,-62.900,-64.300,-64.300) Crest The ENVELOPE(-56.992,-56.992,-63.406,-63.406) |
institution |
Open Polar |
collection |
LSU Digital Commons (Louisiana State University) |
op_collection_id |
ftlouisianastuir |
language |
unknown |
topic |
MCO MMCO fungi FiaWW palynology paleoclimate Ross Sea Climate Earth Sciences Geochemistry Geology Paleobiology Physical Sciences and Mathematics |
spellingShingle |
MCO MMCO fungi FiaWW palynology paleoclimate Ross Sea Climate Earth Sciences Geochemistry Geology Paleobiology Physical Sciences and Mathematics Pilie, Mallory Evaluating Fungal Population Response to the Miocene Climatic Optimum: High-Resolution Palynological Insights from the South China Sea and McMurdo Sound, Antarctica |
topic_facet |
MCO MMCO fungi FiaWW palynology paleoclimate Ross Sea Climate Earth Sciences Geochemistry Geology Paleobiology Physical Sciences and Mathematics |
description |
Fungi play key and specific roles in ecosystems, specifically as many have restricted geographic distributions, known host/substrate preferences, and are important local environmental indicators due to their short dispersal distances. This study of fossil fungi from a time interval of pronounced global warming, the Miocene Climatic Optimum (MCO), allows analysis of fungal response to an analogue for future climate change scenarios. The research presented herein is part of a larger project, Fungi in a Warmer World (FiaWW), which is using globally-distributed sediment samples to provide foundational information on fungal community distribution patterns and will provide the first fungi-based climatological reconstructions for this time period. A probability-based climate reconstruction technique (CREST) provides an accurate plant-based representation of paleoclimate for each MCO locality studied and acts as an external control for the fungi-based paleoclimate reconstructions proposed herein. For this thesis, 27 samples from middle Miocene cored intervals in the South China Sea (SCS) and 44 samples from McMurdo Sound, Antarctica (SMS) are studied. Although diagenesis likely caused significant impacts to the SCS MCO samples, the fungal assemblage present immediately following the MCO indicates a Köppen–Geiger climate class characterized by tropical to temperate conditions. According to CREST, the reconstructed MCO climate for the nearest landmass to the SCS study site is warmer and drier during the winter, when compared to modern-day climate, with precipitation during the MCO being only 37% of modern-day levels. Fungi are depauperate members of the SMS MCO palynoflora, with a single morphotype present in low abundance and maximum concentration ranging only from 72 to 199 fungi per gram of dried sediments. Apiosporaceae fungi are cosmopolitan and show taxa present during the MCO in Antarctica adapt to a wide range of climate and environmental conditions. CREST reconstructs a warmer and significantly wetter than ... |
format |
Text |
author |
Pilie, Mallory |
author_facet |
Pilie, Mallory |
author_sort |
Pilie, Mallory |
title |
Evaluating Fungal Population Response to the Miocene Climatic Optimum: High-Resolution Palynological Insights from the South China Sea and McMurdo Sound, Antarctica |
title_short |
Evaluating Fungal Population Response to the Miocene Climatic Optimum: High-Resolution Palynological Insights from the South China Sea and McMurdo Sound, Antarctica |
title_full |
Evaluating Fungal Population Response to the Miocene Climatic Optimum: High-Resolution Palynological Insights from the South China Sea and McMurdo Sound, Antarctica |
title_fullStr |
Evaluating Fungal Population Response to the Miocene Climatic Optimum: High-Resolution Palynological Insights from the South China Sea and McMurdo Sound, Antarctica |
title_full_unstemmed |
Evaluating Fungal Population Response to the Miocene Climatic Optimum: High-Resolution Palynological Insights from the South China Sea and McMurdo Sound, Antarctica |
title_sort |
evaluating fungal population response to the miocene climatic optimum: high-resolution palynological insights from the south china sea and mcmurdo sound, antarctica |
publisher |
LSU Digital Commons |
publishDate |
2023 |
url |
https://digitalcommons.lsu.edu/gradschool_theses/5750 https://digitalcommons.lsu.edu/context/gradschool_theses/article/6834/viewcontent/Evaluating_Fungal_Population_Response_to_the_Miocene_Climatic_Opt.pdf |
long_lat |
ENVELOPE(-62.900,-62.900,-64.300,-64.300) ENVELOPE(-56.992,-56.992,-63.406,-63.406) |
geographic |
Ross Sea McMurdo Sound Geiger Crest The |
geographic_facet |
Ross Sea McMurdo Sound Geiger Crest The |
genre |
Antarc* Antarctica McMurdo Sound Ross Sea |
genre_facet |
Antarc* Antarctica McMurdo Sound Ross Sea |
op_source |
LSU Master's Theses |
op_relation |
https://digitalcommons.lsu.edu/gradschool_theses/5750 https://digitalcommons.lsu.edu/context/gradschool_theses/article/6834/viewcontent/Evaluating_Fungal_Population_Response_to_the_Miocene_Climatic_Opt.pdf |
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