A MULTIVARIATE ANALYSIS OF THE RECOVERY OF CALCAREOUS NANNOPLANKTON AND PLANKTONIC FORAMINIFERA FROM THE CRETACEOUS/PALEOGENE (K/P) MASS EXTINCTION
The Cretaceous-Paleogene (K/P) bolide impact decimated surface ocean ecosystems. While the extinction has been well studied, there have been few investigations of the recovery of ecosystems from the K/P extinction. The relationship between the post-extinction ecologies of nannoplankton and planktoni...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
Penn State
2009
|
Subjects: | |
Online Access: | http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-4730/index.html |
id |
ftpennstate:OAI:PSUETD:ETD-4730 |
---|---|
record_format |
openpolar |
spelling |
ftpennstate:OAI:PSUETD:ETD-4730 2023-05-15T18:00:17+02:00 A MULTIVARIATE ANALYSIS OF THE RECOVERY OF CALCAREOUS NANNOPLANKTON AND PLANKTONIC FORAMINIFERA FROM THE CRETACEOUS/PALEOGENE (K/P) MASS EXTINCTION Schueth, Jonathan Douglas Timothy J Bralower 2009-12-19 application/pdf http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-4730/index.html en eng Penn State WorldWide Copyright information available at source archive http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-4730/index.html Geoscience text 2009 ftpennstate 2011-09-13T08:45:37Z The Cretaceous-Paleogene (K/P) bolide impact decimated surface ocean ecosystems. While the extinction has been well studied, there have been few investigations of the recovery of ecosystems from the K/P extinction. The relationship between the post-extinction ecologies of nannoplankton and planktonic foraminifera can lend insight into how ecosystems were rebuilt after the K/P impact. This study utilizes multivariate analysis on abundance counts from five sites with wide global distribution to compare the recoveries of these calcareous plankton groups. The analysis shows there is a distinct geographical differentiation in the recovery of both groups, with assemblages in the northern hemisphere surface oceans diversifying more slowly than southern hemisphere surface oceans. This is most likely a result of higher extinction intensity caused by the concentration of dust created by the bolide impact in the northern hemisphere. The multivariate analysis results suggest a probable long-term influence on the post-extinction marine ecosystem was increased nutrient concentration in the surface ocean resulting from the collapse of the biological pump. Nannoplankton recover before planktonic foraminifera in the open ocean, as expected, but after planktonic foraminifera on the shelf. Dinoflagellates, which were common at many shelf locations across the K/P boundary may have provided another food source for planktonic foraminifera and hindered nannoplankton diversification by invading niche space emptied by the K/P extinction. Ecological recovery of calcareous microplankton took place only after the biologic pump was restored ~300 Kyr after the K/P extinction, removing the enhanced nutrient concentrations from the surface ocean. Text Planktonic foraminifera PennState: Electronic Theses and Dissertations (eTD) |
institution |
Open Polar |
collection |
PennState: Electronic Theses and Dissertations (eTD) |
op_collection_id |
ftpennstate |
language |
English |
topic |
Geoscience |
spellingShingle |
Geoscience Schueth, Jonathan Douglas A MULTIVARIATE ANALYSIS OF THE RECOVERY OF CALCAREOUS NANNOPLANKTON AND PLANKTONIC FORAMINIFERA FROM THE CRETACEOUS/PALEOGENE (K/P) MASS EXTINCTION |
topic_facet |
Geoscience |
description |
The Cretaceous-Paleogene (K/P) bolide impact decimated surface ocean ecosystems. While the extinction has been well studied, there have been few investigations of the recovery of ecosystems from the K/P extinction. The relationship between the post-extinction ecologies of nannoplankton and planktonic foraminifera can lend insight into how ecosystems were rebuilt after the K/P impact. This study utilizes multivariate analysis on abundance counts from five sites with wide global distribution to compare the recoveries of these calcareous plankton groups. The analysis shows there is a distinct geographical differentiation in the recovery of both groups, with assemblages in the northern hemisphere surface oceans diversifying more slowly than southern hemisphere surface oceans. This is most likely a result of higher extinction intensity caused by the concentration of dust created by the bolide impact in the northern hemisphere. The multivariate analysis results suggest a probable long-term influence on the post-extinction marine ecosystem was increased nutrient concentration in the surface ocean resulting from the collapse of the biological pump. Nannoplankton recover before planktonic foraminifera in the open ocean, as expected, but after planktonic foraminifera on the shelf. Dinoflagellates, which were common at many shelf locations across the K/P boundary may have provided another food source for planktonic foraminifera and hindered nannoplankton diversification by invading niche space emptied by the K/P extinction. Ecological recovery of calcareous microplankton took place only after the biologic pump was restored ~300 Kyr after the K/P extinction, removing the enhanced nutrient concentrations from the surface ocean. |
author2 |
Timothy J Bralower |
format |
Text |
author |
Schueth, Jonathan Douglas |
author_facet |
Schueth, Jonathan Douglas |
author_sort |
Schueth, Jonathan Douglas |
title |
A MULTIVARIATE ANALYSIS OF THE RECOVERY OF CALCAREOUS NANNOPLANKTON AND PLANKTONIC FORAMINIFERA FROM THE CRETACEOUS/PALEOGENE (K/P) MASS EXTINCTION |
title_short |
A MULTIVARIATE ANALYSIS OF THE RECOVERY OF CALCAREOUS NANNOPLANKTON AND PLANKTONIC FORAMINIFERA FROM THE CRETACEOUS/PALEOGENE (K/P) MASS EXTINCTION |
title_full |
A MULTIVARIATE ANALYSIS OF THE RECOVERY OF CALCAREOUS NANNOPLANKTON AND PLANKTONIC FORAMINIFERA FROM THE CRETACEOUS/PALEOGENE (K/P) MASS EXTINCTION |
title_fullStr |
A MULTIVARIATE ANALYSIS OF THE RECOVERY OF CALCAREOUS NANNOPLANKTON AND PLANKTONIC FORAMINIFERA FROM THE CRETACEOUS/PALEOGENE (K/P) MASS EXTINCTION |
title_full_unstemmed |
A MULTIVARIATE ANALYSIS OF THE RECOVERY OF CALCAREOUS NANNOPLANKTON AND PLANKTONIC FORAMINIFERA FROM THE CRETACEOUS/PALEOGENE (K/P) MASS EXTINCTION |
title_sort |
multivariate analysis of the recovery of calcareous nannoplankton and planktonic foraminifera from the cretaceous/paleogene (k/p) mass extinction |
publisher |
Penn State |
publishDate |
2009 |
url |
http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-4730/index.html |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-4730/index.html |
op_rights |
WorldWide Copyright information available at source archive |
_version_ |
1766169330974720000 |