Living Planktonic Foraminifera from the Equatorial and Southeast Pacific
1. A study was made of 81 plankton samples, mostly from the equatorial and southeast Pacific Ocean. The distribution patterns of 16 of the more common planktonic species of Foraminifera are as follows : 1) Widespread-Globigerinella aequilateralis, Globigerinoides ruber, Hastigerina pelagica, Orbcdin...
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fttohokuunivir:oai:tohoku.repo.nii.ac.jp:00010738 2023-05-15T18:00:28+02:00 Living Planktonic Foraminifera from the Equatorial and Southeast Pacific Parker Frances L. 1960-05-05 application/pdf 868711 bytes http://hdl.handle.net/10097/28883 https://tohoku.repo.nii.ac.jp/?action=repository_uri&item_id=10738 https://tohoku.repo.nii.ac.jp/?action=repository_action_common_download&item_id=10738&item_no=1&attribute_id=18&file_no=1 en eng Tohoku University https://tohoku.repo.nii.ac.jp/?action=repository_uri&item_id=10738 http://hdl.handle.net/10097/28883 Science reports of the Tohoku University. 2nd series, Geology. Special volume = 東北大学理科報告. 地質学, 4, 71-82(1960-05-05) 0082464X AA0083635X https://tohoku.repo.nii.ac.jp/?action=repository_action_common_download&item_id=10738&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper 紀要類(bulletin) 1960 fttohokuunivir 2022-11-20T21:50:50Z 1. A study was made of 81 plankton samples, mostly from the equatorial and southeast Pacific Ocean. The distribution patterns of 16 of the more common planktonic species of Foraminifera are as follows : 1) Widespread-Globigerinella aequilateralis, Globigerinoides ruber, Hastigerina pelagica, Orbcdina universa 2) Equatorial and southeast-central-Globigerina eggeri, Globigerinoides conglobatus, G. sacculifer 3) Equatorial-Globigerina conglomerata, G. hexagona, Globorotalia menardii (few exceptions), Pulleniatina obliquiloculata (one exception) 4) Southeast central and subantarctic-Globigerina bulloides, G. inflata, Globorotalia punctulata, G. truncatulinoides 5) Subantarctic-Globorotalia scitula. 2. Temperature may be more critical than salinity in controlling these distributions. No conclusions about the physical limits for survival of the planktonic species can be formed until it is known exactly at what water levels they live. 3. Total populations were largest in the equatorial region, in a small area close to the coast of South America, and at a few stations in the northern part of the subantarctic region. These are the regions richest in nutrients. 4. The largest populations were found in the upper 200 m. In addition, the populations from daytime oblique tows from various depths exceeded by a factor of ten the number found in corresponding night tows at the same station. The possible dependence of the planktonic Foraminifera on symbiotic algae is suggested as the reason for the apparent preference for the euphotic zone. Nothing further can be said until more is known about the habits of the planktonic Foraminifera. Report Planktonic foraminifera Tohoku University Repository (TOUR) Pacific |
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Open Polar |
collection |
Tohoku University Repository (TOUR) |
op_collection_id |
fttohokuunivir |
language |
English |
description |
1. A study was made of 81 plankton samples, mostly from the equatorial and southeast Pacific Ocean. The distribution patterns of 16 of the more common planktonic species of Foraminifera are as follows : 1) Widespread-Globigerinella aequilateralis, Globigerinoides ruber, Hastigerina pelagica, Orbcdina universa 2) Equatorial and southeast-central-Globigerina eggeri, Globigerinoides conglobatus, G. sacculifer 3) Equatorial-Globigerina conglomerata, G. hexagona, Globorotalia menardii (few exceptions), Pulleniatina obliquiloculata (one exception) 4) Southeast central and subantarctic-Globigerina bulloides, G. inflata, Globorotalia punctulata, G. truncatulinoides 5) Subantarctic-Globorotalia scitula. 2. Temperature may be more critical than salinity in controlling these distributions. No conclusions about the physical limits for survival of the planktonic species can be formed until it is known exactly at what water levels they live. 3. Total populations were largest in the equatorial region, in a small area close to the coast of South America, and at a few stations in the northern part of the subantarctic region. These are the regions richest in nutrients. 4. The largest populations were found in the upper 200 m. In addition, the populations from daytime oblique tows from various depths exceeded by a factor of ten the number found in corresponding night tows at the same station. The possible dependence of the planktonic Foraminifera on symbiotic algae is suggested as the reason for the apparent preference for the euphotic zone. Nothing further can be said until more is known about the habits of the planktonic Foraminifera. |
format |
Report |
author |
Parker Frances L. |
spellingShingle |
Parker Frances L. Living Planktonic Foraminifera from the Equatorial and Southeast Pacific |
author_facet |
Parker Frances L. |
author_sort |
Parker Frances L. |
title |
Living Planktonic Foraminifera from the Equatorial and Southeast Pacific |
title_short |
Living Planktonic Foraminifera from the Equatorial and Southeast Pacific |
title_full |
Living Planktonic Foraminifera from the Equatorial and Southeast Pacific |
title_fullStr |
Living Planktonic Foraminifera from the Equatorial and Southeast Pacific |
title_full_unstemmed |
Living Planktonic Foraminifera from the Equatorial and Southeast Pacific |
title_sort |
living planktonic foraminifera from the equatorial and southeast pacific |
publisher |
Tohoku University |
publishDate |
1960 |
url |
http://hdl.handle.net/10097/28883 https://tohoku.repo.nii.ac.jp/?action=repository_uri&item_id=10738 https://tohoku.repo.nii.ac.jp/?action=repository_action_common_download&item_id=10738&item_no=1&attribute_id=18&file_no=1 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://tohoku.repo.nii.ac.jp/?action=repository_uri&item_id=10738 http://hdl.handle.net/10097/28883 Science reports of the Tohoku University. 2nd series, Geology. Special volume = 東北大学理科報告. 地質学, 4, 71-82(1960-05-05) 0082464X AA0083635X https://tohoku.repo.nii.ac.jp/?action=repository_action_common_download&item_id=10738&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766169575258324992 |