Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time.
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University of Cincinnati / OhioLINK
2014
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ndltd-OhioLink-oai-etd.ohiolink.edu-ucin14156257542021-08-03T06:27:54Z Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time. Zaffos, Andrew A. Paleontology Response Curves Niche Conservatism Latitudinal Diversity Gradient type-Cincinnatian Series Hamilton Group The distribution of taxa across time and space is controlled by each taxon’s responses to a potentially infinite number of different environmental and biological stimuli. Broader regional patterns of taxonomic distribution, however, are primarily controlled by only a few key environmental variables. The response of taxa to any single environmental variable, determined to be of ecological importance, can be modeled as a Gaussian curve, along which taxa symmetrically rise and fall in abundance in tandem with environmental changes. This “unimodal response curve model” can be used to evaluate a number of prominent hypotheses in community ecology and paleobiology. In this dissertation, such a model is used to understand: patterns of immigration, emigration, extinction, and origination along the global latitudinal gradient throughout the Cenozoic Era (65 mya-Present); patterns of ecological stability playing out over millions of years in the Middle Devonian (Givetian, ~387-382 mya) strata of the northern Appalachian basin; and the impact of geologic preservation and faunal turnover on perceptions of ecological stability between two different ancient marine basins, the Middle Devonian upper Hamilton Group of the northern Appalachian basin and the Upper Ordovician (Cincinnatian, ~454-444 mya) type-Cincinnatian Series of the Cincinnati Arch. Collectively, across all study areas, there is a confluence of evidence for a ubiquitous pattern of conservatism at all scales investigated, with a greater tendency towards smaller changes in the shape and size of response curves than larger ones over timescales ranging from hundreds of thousands to tens of millions of years. 2014 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415625754 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415625754 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center. |
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NDLTD |
| language |
English |
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NDLTD |
| topic |
Paleontology Response Curves Niche Conservatism Latitudinal Diversity Gradient type-Cincinnatian Series Hamilton Group |
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Paleontology Response Curves Niche Conservatism Latitudinal Diversity Gradient type-Cincinnatian Series Hamilton Group Zaffos, Andrew A. Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time. |
| author |
Zaffos, Andrew A. |
| author_facet |
Zaffos, Andrew A. |
| author_sort |
Zaffos, Andrew A. |
| title |
Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time. |
| title_short |
Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time. |
| title_full |
Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time. |
| title_fullStr |
Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time. |
| title_full_unstemmed |
Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time. |
| title_sort |
diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time. |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2014 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415625754 |
| work_keys_str_mv |
AT zaffosandrewa diagnosisandpredictionofvariationsintheenvironmentaldistributionsofmarinefossiltaxaacrossspaceandtime |
| _version_ |
1719437318883901440 |