THE ECOLOGY, BIOGEOCHEMISTRY AND PHYLOGENY OF METHANE SEEP AND NON-SEEP BENTHIC FORAMINIFERA FROM THE PACIFIC MARGIN
In an effort to understand the relationships between active methane seep and adjacent non-seep (inactive) populations of the deep-sea foraminifera Cibicidoides wuellerstorfi, a common paleo-indicator species, from methane seeps in the Pacific were analyzed and compared to one another for genetic sim...
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Indiana State University
2015
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ftindianastauniv:oai:scholars.indstate.edu:10484/12688 2023-05-15T13:46:09+02:00 THE ECOLOGY, BIOGEOCHEMISTRY AND PHYLOGENY OF METHANE SEEP AND NON-SEEP BENTHIC FORAMINIFERA FROM THE PACIFIC MARGIN Burkett, Ashley M. 2015-05 http://hdl.handle.net/10484/12688 en_US eng Indiana State University http://hdl.handle.net/10484/12688 Stable Isotopic Geochemistry Protoplasm Degradation Foraminiferal Colonization Dissertation 2015 ftindianastauniv 2022-12-01T18:51:07Z In an effort to understand the relationships between active methane seep and adjacent non-seep (inactive) populations of the deep-sea foraminifera Cibicidoides wuellerstorfi, a common paleo-indicator species, from methane seeps in the Pacific were analyzed and compared to one another for genetic similarities of small subunit rDNA (SSU rDNA) sequences. Pacific Ocean C. wuellerstorfi were also compared to those collected from other localities around the world (based on 18S gene available on Genbank, e.g., Schweizer et al., 2009). Results from this study revealed that C. wuellerstorfi living in seeps near Costa Rica and Hydrate Ridge are genetically similar to one another at the species level. Individuals collected from the same location that display opposite coiling directions (dextral and sinistral) had no species level genetic differences. Comparisons of specimens with genetic information available from Genbank (SSU rDNA) showed that Pacific individuals, collected for this study, are genetically similar to those previously analyzed from the North Atlantic and Antarctic. These observations provide strong evidence for the true cosmopolitan nature of C. wuellerstorfi and highlight the importance of understanding how these microscopic organisms are able to maintain sufficient genetic exchange to remain within the same species between seep and nonseep habitats and over global distances. Although organic matter degradation rates have been studied for some time, in situ rates of protoplasm degradation in deep-sea foraminiferal tests have been estimated based on laboratory experiments and sediment distribution patterns. Information regarding degradation rates of foraminiferal protoplasm is essential in the use of non-vital stains in identifying the amount and character of protoplasm in tests which remains the most commonly used method to assess living populations of benthic foraminifera (e.g., Murray and Bowser, 2000). In an effort to examine the retention potential of foraminiferal protoplasm on the deep seafloor 36 ... Doctoral or Postdoctoral Thesis Antarc* Antarctic North Atlantic Sycamore Scholars at Indiana State University Antarctic Bowser ENVELOPE(-155.600,-155.600,-86.050,-86.050) Pacific |
institution |
Open Polar |
collection |
Sycamore Scholars at Indiana State University |
op_collection_id |
ftindianastauniv |
language |
English |
topic |
Stable Isotopic Geochemistry Protoplasm Degradation Foraminiferal Colonization |
spellingShingle |
Stable Isotopic Geochemistry Protoplasm Degradation Foraminiferal Colonization Burkett, Ashley M. THE ECOLOGY, BIOGEOCHEMISTRY AND PHYLOGENY OF METHANE SEEP AND NON-SEEP BENTHIC FORAMINIFERA FROM THE PACIFIC MARGIN |
topic_facet |
Stable Isotopic Geochemistry Protoplasm Degradation Foraminiferal Colonization |
description |
In an effort to understand the relationships between active methane seep and adjacent non-seep (inactive) populations of the deep-sea foraminifera Cibicidoides wuellerstorfi, a common paleo-indicator species, from methane seeps in the Pacific were analyzed and compared to one another for genetic similarities of small subunit rDNA (SSU rDNA) sequences. Pacific Ocean C. wuellerstorfi were also compared to those collected from other localities around the world (based on 18S gene available on Genbank, e.g., Schweizer et al., 2009). Results from this study revealed that C. wuellerstorfi living in seeps near Costa Rica and Hydrate Ridge are genetically similar to one another at the species level. Individuals collected from the same location that display opposite coiling directions (dextral and sinistral) had no species level genetic differences. Comparisons of specimens with genetic information available from Genbank (SSU rDNA) showed that Pacific individuals, collected for this study, are genetically similar to those previously analyzed from the North Atlantic and Antarctic. These observations provide strong evidence for the true cosmopolitan nature of C. wuellerstorfi and highlight the importance of understanding how these microscopic organisms are able to maintain sufficient genetic exchange to remain within the same species between seep and nonseep habitats and over global distances. Although organic matter degradation rates have been studied for some time, in situ rates of protoplasm degradation in deep-sea foraminiferal tests have been estimated based on laboratory experiments and sediment distribution patterns. Information regarding degradation rates of foraminiferal protoplasm is essential in the use of non-vital stains in identifying the amount and character of protoplasm in tests which remains the most commonly used method to assess living populations of benthic foraminifera (e.g., Murray and Bowser, 2000). In an effort to examine the retention potential of foraminiferal protoplasm on the deep seafloor 36 ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Burkett, Ashley M. |
author_facet |
Burkett, Ashley M. |
author_sort |
Burkett, Ashley M. |
title |
THE ECOLOGY, BIOGEOCHEMISTRY AND PHYLOGENY OF METHANE SEEP AND NON-SEEP BENTHIC FORAMINIFERA FROM THE PACIFIC MARGIN |
title_short |
THE ECOLOGY, BIOGEOCHEMISTRY AND PHYLOGENY OF METHANE SEEP AND NON-SEEP BENTHIC FORAMINIFERA FROM THE PACIFIC MARGIN |
title_full |
THE ECOLOGY, BIOGEOCHEMISTRY AND PHYLOGENY OF METHANE SEEP AND NON-SEEP BENTHIC FORAMINIFERA FROM THE PACIFIC MARGIN |
title_fullStr |
THE ECOLOGY, BIOGEOCHEMISTRY AND PHYLOGENY OF METHANE SEEP AND NON-SEEP BENTHIC FORAMINIFERA FROM THE PACIFIC MARGIN |
title_full_unstemmed |
THE ECOLOGY, BIOGEOCHEMISTRY AND PHYLOGENY OF METHANE SEEP AND NON-SEEP BENTHIC FORAMINIFERA FROM THE PACIFIC MARGIN |
title_sort |
ecology, biogeochemistry and phylogeny of methane seep and non-seep benthic foraminifera from the pacific margin |
publisher |
Indiana State University |
publishDate |
2015 |
url |
http://hdl.handle.net/10484/12688 |
long_lat |
ENVELOPE(-155.600,-155.600,-86.050,-86.050) |
geographic |
Antarctic Bowser Pacific |
geographic_facet |
Antarctic Bowser Pacific |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_relation |
http://hdl.handle.net/10484/12688 |
_version_ |
1766237830555631616 |