Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans
From a synthesis of recent oceanic observations and paleo-data it is evident that certain species of giant diatoms including Rhizosolenia spp. Thalassiothrix spp. and Ethmodiscus rex may become concentrated at oceanic frontal zones and subsequently form episodes of mass flux to the sediment. Within...
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Online Access: | https://epic.awi.de/id/eprint/39405/ https://epic.awi.de/id/eprint/39405/1/Kemp2006.pdf https://hdl.handle.net/10013/epic.46623 https://hdl.handle.net/10013/epic.46623.d001 |
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ftawi:oai:epic.awi.de:39405 2024-09-15T18:37:19+00:00 Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans Kemp, A.E.S Pearce, R.B. Grigorov, I. Rance, J. Lange, C.B. Quilty, P. Salter, I. 2006-10-13 application/pdf https://epic.awi.de/id/eprint/39405/ https://epic.awi.de/id/eprint/39405/1/Kemp2006.pdf https://hdl.handle.net/10013/epic.46623 https://hdl.handle.net/10013/epic.46623.d001 unknown Wiley https://epic.awi.de/id/eprint/39405/1/Kemp2006.pdf https://hdl.handle.net/10013/epic.46623.d001 Kemp, A. , Pearce, R. , Grigorov, I. , Rance, J. , Lange, C. , Quilty, P. and Salter, I. orcid:0000-0002-4513-0314 (2006) Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans , Global Biogeochemical Cycles, 20 (4) . doi:10.1029/2006GB002698 <https://doi.org/10.1029/2006GB002698> , hdl:10013/epic.46623 EPIC3Global Biogeochemical Cycles, Wiley, 20(4), ISSN: 0886-6236 Article peerRev 2006 ftawi https://doi.org/10.1029/2006GB002698 2024-06-24T04:13:16Z From a synthesis of recent oceanic observations and paleo-data it is evident that certain species of giant diatoms including Rhizosolenia spp. Thalassiothrix spp. and Ethmodiscus rex may become concentrated at oceanic frontal zones and subsequently form episodes of mass flux to the sediment. Within the nutrient bearing waters advecting towards frontal boundaries, these species are generally not dominant, but they appear selectively segregated at fronts, and thus may dominate the export flux. Ancient Thalassiothrix diatom mat deposits in the eastern equatorial Pacific and beneath the Polar Front in the Southern Ocean record the highest open ocean sedimentation rates ever documented and represent vast sinks of silica and carbon. Several of the species involved are adapted to a stratified water column and may thrive in Deep Chlorophyll Maxima. Thus in oceanic regions and/or at times prone to enhanced surface water stratification (e.g., during meltwater pulses) they provide a mechanism for generating substantial biomass at depth and its subsequent export with concomitant implications for Si export and C drawdown. This ecology has important implications for ocean biogeochemical models suggesting that more than one diatom “functional type” should be used. In spite of the importance of these giant diatoms for biogeochemical cycling, their large size coupled with the constraints of conventional oceanographic survey schemes and techniques means that they are undersampled. An improved insight into these key species will be an important prerequisite for enhancing our understanding of marine biogeochemical cycling and for assessing the impacts of climate change on ocean export production. Article in Journal/Newspaper Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Global Biogeochemical Cycles 20 4 n/a n/a |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
From a synthesis of recent oceanic observations and paleo-data it is evident that certain species of giant diatoms including Rhizosolenia spp. Thalassiothrix spp. and Ethmodiscus rex may become concentrated at oceanic frontal zones and subsequently form episodes of mass flux to the sediment. Within the nutrient bearing waters advecting towards frontal boundaries, these species are generally not dominant, but they appear selectively segregated at fronts, and thus may dominate the export flux. Ancient Thalassiothrix diatom mat deposits in the eastern equatorial Pacific and beneath the Polar Front in the Southern Ocean record the highest open ocean sedimentation rates ever documented and represent vast sinks of silica and carbon. Several of the species involved are adapted to a stratified water column and may thrive in Deep Chlorophyll Maxima. Thus in oceanic regions and/or at times prone to enhanced surface water stratification (e.g., during meltwater pulses) they provide a mechanism for generating substantial biomass at depth and its subsequent export with concomitant implications for Si export and C drawdown. This ecology has important implications for ocean biogeochemical models suggesting that more than one diatom “functional type” should be used. In spite of the importance of these giant diatoms for biogeochemical cycling, their large size coupled with the constraints of conventional oceanographic survey schemes and techniques means that they are undersampled. An improved insight into these key species will be an important prerequisite for enhancing our understanding of marine biogeochemical cycling and for assessing the impacts of climate change on ocean export production. |
format |
Article in Journal/Newspaper |
author |
Kemp, A.E.S Pearce, R.B. Grigorov, I. Rance, J. Lange, C.B. Quilty, P. Salter, I. |
spellingShingle |
Kemp, A.E.S Pearce, R.B. Grigorov, I. Rance, J. Lange, C.B. Quilty, P. Salter, I. Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans |
author_facet |
Kemp, A.E.S Pearce, R.B. Grigorov, I. Rance, J. Lange, C.B. Quilty, P. Salter, I. |
author_sort |
Kemp, A.E.S |
title |
Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans |
title_short |
Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans |
title_full |
Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans |
title_fullStr |
Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans |
title_full_unstemmed |
Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans |
title_sort |
production of giant marine diatoms and their export at oceanic frontal zones: implications for si and c flux from stratified oceans |
publisher |
Wiley |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/39405/ https://epic.awi.de/id/eprint/39405/1/Kemp2006.pdf https://hdl.handle.net/10013/epic.46623 https://hdl.handle.net/10013/epic.46623.d001 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Global Biogeochemical Cycles, Wiley, 20(4), ISSN: 0886-6236 |
op_relation |
https://epic.awi.de/id/eprint/39405/1/Kemp2006.pdf https://hdl.handle.net/10013/epic.46623.d001 Kemp, A. , Pearce, R. , Grigorov, I. , Rance, J. , Lange, C. , Quilty, P. and Salter, I. orcid:0000-0002-4513-0314 (2006) Production of giant marine diatoms and their export at oceanic frontal zones: Implications for Si and C flux from stratified oceans , Global Biogeochemical Cycles, 20 (4) . doi:10.1029/2006GB002698 <https://doi.org/10.1029/2006GB002698> , hdl:10013/epic.46623 |
op_doi |
https://doi.org/10.1029/2006GB002698 |
container_title |
Global Biogeochemical Cycles |
container_volume |
20 |
container_issue |
4 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1810481683006226432 |