Climatic forcing of quaternary deep-sea benthic communities in the North Pacific Ocean
There is growing evidence that changes in deep-sea benthic ecosystems are modulated by climate changes, but most evidence to date comes from the North Atlantic Ocean. Here we analyze new ostracod and published foraminiferal records for the last 250,000 years on Shatsky Rise in the North Pacific Ocea...
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crcambridgeupr:10.1017/s0094837300000464 2024-04-28T08:30:27+00:00 Climatic forcing of quaternary deep-sea benthic communities in the North Pacific Ocean Yasuhara, Moriaki Hunt, Gene Cronin, Thomas M. Hokanishi, Natsumi Kawahata, Hodaka Tsujimoto, Akira Ishitake, Miho 2012 http://dx.doi.org/10.1017/s0094837300000464 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300000464 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Paleobiology volume 38, issue 1, page 162-179 ISSN 0094-8373 1938-5331 Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics journal-article 2012 crcambridgeupr https://doi.org/10.1017/s0094837300000464 2024-04-09T06:56:11Z There is growing evidence that changes in deep-sea benthic ecosystems are modulated by climate changes, but most evidence to date comes from the North Atlantic Ocean. Here we analyze new ostracod and published foraminiferal records for the last 250,000 years on Shatsky Rise in the North Pacific Ocean. Using linear models, we evaluate statistically the ability of environmental drivers (temperature, productivity, and seasonality of productivity) to predict changes in faunal diversity, abundance, and composition. These microfossil data show glacial-interglacial shifts in overall abundances and species diversities that are low during glacial intervals and high during interglacials. These patterns replicate those previously documented in the North Atlantic Ocean, suggesting that the climatic forcing of the deep-sea ecosystem is widespread, and possibly global in nature. However, these results also reveal differences with prior studies that probably reflect the isolated nature of Shatsky Rise as a remote oceanic plateau. Ostracod assemblages on Shatsky Rise are highly endemic but of low diversity, consistent with the limited dispersal potential of these animals. Benthic foraminifera, by contrast, have much greater dispersal ability and their assemblages at Shatsky Rise show diversities typical for deep-sea faunas in other regions. Statistical analyses also reveal ostracod-foraminferal differences in relationships between environmental drivers and biotic change. Rarefied diversity is best explained as a hump-shaped function of surface productivity in ostracods, but as having a weak and positive relationship with temperature in foraminifera. Abundance shows a positive relationship with both productivity and seasonality of productivity in foraminifera, and a hump-shaped relationship with productivity in ostracods. Finally, species composition in ostracods is influenced by both temperature and productivity, but only a temperature effect is evident in foraminifera. Though complex in detail, the global-scale link between ... Article in Journal/Newspaper North Atlantic Cambridge University Press Paleobiology 38 1 162 179 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics Yasuhara, Moriaki Hunt, Gene Cronin, Thomas M. Hokanishi, Natsumi Kawahata, Hodaka Tsujimoto, Akira Ishitake, Miho Climatic forcing of quaternary deep-sea benthic communities in the North Pacific Ocean |
topic_facet |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics |
description |
There is growing evidence that changes in deep-sea benthic ecosystems are modulated by climate changes, but most evidence to date comes from the North Atlantic Ocean. Here we analyze new ostracod and published foraminiferal records for the last 250,000 years on Shatsky Rise in the North Pacific Ocean. Using linear models, we evaluate statistically the ability of environmental drivers (temperature, productivity, and seasonality of productivity) to predict changes in faunal diversity, abundance, and composition. These microfossil data show glacial-interglacial shifts in overall abundances and species diversities that are low during glacial intervals and high during interglacials. These patterns replicate those previously documented in the North Atlantic Ocean, suggesting that the climatic forcing of the deep-sea ecosystem is widespread, and possibly global in nature. However, these results also reveal differences with prior studies that probably reflect the isolated nature of Shatsky Rise as a remote oceanic plateau. Ostracod assemblages on Shatsky Rise are highly endemic but of low diversity, consistent with the limited dispersal potential of these animals. Benthic foraminifera, by contrast, have much greater dispersal ability and their assemblages at Shatsky Rise show diversities typical for deep-sea faunas in other regions. Statistical analyses also reveal ostracod-foraminferal differences in relationships between environmental drivers and biotic change. Rarefied diversity is best explained as a hump-shaped function of surface productivity in ostracods, but as having a weak and positive relationship with temperature in foraminifera. Abundance shows a positive relationship with both productivity and seasonality of productivity in foraminifera, and a hump-shaped relationship with productivity in ostracods. Finally, species composition in ostracods is influenced by both temperature and productivity, but only a temperature effect is evident in foraminifera. Though complex in detail, the global-scale link between ... |
format |
Article in Journal/Newspaper |
author |
Yasuhara, Moriaki Hunt, Gene Cronin, Thomas M. Hokanishi, Natsumi Kawahata, Hodaka Tsujimoto, Akira Ishitake, Miho |
author_facet |
Yasuhara, Moriaki Hunt, Gene Cronin, Thomas M. Hokanishi, Natsumi Kawahata, Hodaka Tsujimoto, Akira Ishitake, Miho |
author_sort |
Yasuhara, Moriaki |
title |
Climatic forcing of quaternary deep-sea benthic communities in the North Pacific Ocean |
title_short |
Climatic forcing of quaternary deep-sea benthic communities in the North Pacific Ocean |
title_full |
Climatic forcing of quaternary deep-sea benthic communities in the North Pacific Ocean |
title_fullStr |
Climatic forcing of quaternary deep-sea benthic communities in the North Pacific Ocean |
title_full_unstemmed |
Climatic forcing of quaternary deep-sea benthic communities in the North Pacific Ocean |
title_sort |
climatic forcing of quaternary deep-sea benthic communities in the north pacific ocean |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1017/s0094837300000464 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300000464 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Paleobiology volume 38, issue 1, page 162-179 ISSN 0094-8373 1938-5331 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0094837300000464 |
container_title |
Paleobiology |
container_volume |
38 |
container_issue |
1 |
container_start_page |
162 |
op_container_end_page |
179 |
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1797588312209227776 |