Seasonality in planktic foraminifera of the central California coastal upwelling region
The close association between planktic foraminiferal assemblages and local hydrography make foraminifera invaluable proxies for environmental conditions. Modern foraminiferal seasonality is important for interpreting fossil distributions and shell geochemistry as paleoclimate proxies. Understanding...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/bg-13-5139-2016 https://www.biogeosciences.net/13/5139/2016/ |
id |
ftcopernicus:oai:publications.copernicus.org:bg48622 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:bg48622 2023-05-15T17:14:57+02:00 Seasonality in planktic foraminifera of the central California coastal upwelling region Davis, Catherine V. Hill, Tessa M. Russell, Ann D. Gaylord, Brian Jahncke, Jaime 2018-09-27 application/pdf https://doi.org/10.5194/bg-13-5139-2016 https://www.biogeosciences.net/13/5139/2016/ eng eng doi:10.5194/bg-13-5139-2016 https://www.biogeosciences.net/13/5139/2016/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-13-5139-2016 2019-12-24T09:51:59Z The close association between planktic foraminiferal assemblages and local hydrography make foraminifera invaluable proxies for environmental conditions. Modern foraminiferal seasonality is important for interpreting fossil distributions and shell geochemistry as paleoclimate proxies. Understanding this seasonality in an active upwelling area is also critical for anticipating which species may be vulnerable to future changes in upwelling intensity and ocean acidification. Two years (2012–2014) of plankton tows, along with conductivity–temperature–depth profiles and carbonate chemistry measurements taken along the north-central California shelf, offer new insights into the seasonal dynamics of planktic foraminifera in a seasonal coastal upwelling regime. This study finds an upwelling affinity for Neogloboquadrina pachyderma as well as a seasonal and upwelling associated alternation between dominance of N. pachyderma and Neogloboquadrina incompta , consistent with previous observations. Globigerina bulloides , however, shows a strong affinity for non-upwelled waters, in contrast to findings in Southern California where the species is often associated with upwelling. We also find an apparent lunar periodicity in the abundances of all species and document the presence of foraminifera even at very low saturation states of calcite. Text Neogloboquadrina pachyderma Ocean acidification Copernicus Publications: E-Journals Biogeosciences 13 18 5139 5150 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The close association between planktic foraminiferal assemblages and local hydrography make foraminifera invaluable proxies for environmental conditions. Modern foraminiferal seasonality is important for interpreting fossil distributions and shell geochemistry as paleoclimate proxies. Understanding this seasonality in an active upwelling area is also critical for anticipating which species may be vulnerable to future changes in upwelling intensity and ocean acidification. Two years (2012–2014) of plankton tows, along with conductivity–temperature–depth profiles and carbonate chemistry measurements taken along the north-central California shelf, offer new insights into the seasonal dynamics of planktic foraminifera in a seasonal coastal upwelling regime. This study finds an upwelling affinity for Neogloboquadrina pachyderma as well as a seasonal and upwelling associated alternation between dominance of N. pachyderma and Neogloboquadrina incompta , consistent with previous observations. Globigerina bulloides , however, shows a strong affinity for non-upwelled waters, in contrast to findings in Southern California where the species is often associated with upwelling. We also find an apparent lunar periodicity in the abundances of all species and document the presence of foraminifera even at very low saturation states of calcite. |
format |
Text |
author |
Davis, Catherine V. Hill, Tessa M. Russell, Ann D. Gaylord, Brian Jahncke, Jaime |
spellingShingle |
Davis, Catherine V. Hill, Tessa M. Russell, Ann D. Gaylord, Brian Jahncke, Jaime Seasonality in planktic foraminifera of the central California coastal upwelling region |
author_facet |
Davis, Catherine V. Hill, Tessa M. Russell, Ann D. Gaylord, Brian Jahncke, Jaime |
author_sort |
Davis, Catherine V. |
title |
Seasonality in planktic foraminifera of the central California coastal upwelling region |
title_short |
Seasonality in planktic foraminifera of the central California coastal upwelling region |
title_full |
Seasonality in planktic foraminifera of the central California coastal upwelling region |
title_fullStr |
Seasonality in planktic foraminifera of the central California coastal upwelling region |
title_full_unstemmed |
Seasonality in planktic foraminifera of the central California coastal upwelling region |
title_sort |
seasonality in planktic foraminifera of the central california coastal upwelling region |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-13-5139-2016 https://www.biogeosciences.net/13/5139/2016/ |
genre |
Neogloboquadrina pachyderma Ocean acidification |
genre_facet |
Neogloboquadrina pachyderma Ocean acidification |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-13-5139-2016 https://www.biogeosciences.net/13/5139/2016/ |
op_doi |
https://doi.org/10.5194/bg-13-5139-2016 |
container_title |
Biogeosciences |
container_volume |
13 |
container_issue |
18 |
container_start_page |
5139 |
op_container_end_page |
5150 |
_version_ |
1766073068145344512 |