Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies
The composition of planktonic foraminiferal (PF) calcite is routinely used to reconstruct climate variability. However, PF ecology leaves a large imprint on the proxy signal: seasonal and vertical habitats of PF species vary spatially, causing variable offsets from annual mean surface conditions rec...
Published in: | Climate of the Past |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2017
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-13-573-2017 https://doaj.org/article/46c1534d1fda40239569bf07d1910ef1 |
id |
ftdoajarticles:oai:doaj.org/article:46c1534d1fda40239569bf07d1910ef1 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:46c1534d1fda40239569bf07d1910ef1 2023-05-15T18:01:09+02:00 Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies L. Jonkers M. Kučera 2017-06-01T00:00:00Z https://doi.org/10.5194/cp-13-573-2017 https://doaj.org/article/46c1534d1fda40239569bf07d1910ef1 EN eng Copernicus Publications http://www.clim-past.net/13/573/2017/cp-13-573-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-573-2017 1814-9324 1814-9332 https://doaj.org/article/46c1534d1fda40239569bf07d1910ef1 Climate of the Past, Vol 13, Pp 573-586 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-573-2017 2022-12-31T14:23:57Z The composition of planktonic foraminiferal (PF) calcite is routinely used to reconstruct climate variability. However, PF ecology leaves a large imprint on the proxy signal: seasonal and vertical habitats of PF species vary spatially, causing variable offsets from annual mean surface conditions recorded by sedimentary assemblages. PF seasonality changes with temperature in a way that minimises the environmental change that individual species experience and it is not unlikely that changes in depth habitat also result from such habitat tracking. While this behaviour could lead to an underestimation of spatial or temporal trends as well as of variability in proxy records, most palaeoceanographic studies are (implicitly) based on the assumption of a constant habitat. Up to now, the effect of habitat tracking on foraminifera proxy records has not yet been formally quantified on a global scale. Here we attempt to characterise this effect on the amplitude of environmental change recorded in sedimentary PF using core top δ 18 O data from six species. We find that the offset from mean annual near-surface δ 18 O values varies with temperature, with PF δ 18 O indicating warmer than mean conditions in colder waters (on average by −0.1 ‰ (equivalent to 0.4 °C) per °C), thus providing a first-order quantification of the degree of underestimation due to habitat tracking. We use an empirical model to estimate the contribution of seasonality to the observed difference between PF and annual mean δ 18 O and use the residual Δ δ 18 O to assess trends in calcification depth. Our analysis indicates that given an observation-based model parametrisation calcification depth increases with temperature in all species and sensitivity analysis suggests that a temperature-related seasonal habitat adjustment is essential to explain the observed isotope signal. Habitat tracking can thus lead to a significant reduction in the amplitude of recorded environmental change. However, we show that this behaviour is predictable. This allows accounting ... Article in Journal/Newspaper Planktonic foraminifera Directory of Open Access Journals: DOAJ Articles Climate of the Past 13 6 573 586 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 L. Jonkers M. Kučera Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The composition of planktonic foraminiferal (PF) calcite is routinely used to reconstruct climate variability. However, PF ecology leaves a large imprint on the proxy signal: seasonal and vertical habitats of PF species vary spatially, causing variable offsets from annual mean surface conditions recorded by sedimentary assemblages. PF seasonality changes with temperature in a way that minimises the environmental change that individual species experience and it is not unlikely that changes in depth habitat also result from such habitat tracking. While this behaviour could lead to an underestimation of spatial or temporal trends as well as of variability in proxy records, most palaeoceanographic studies are (implicitly) based on the assumption of a constant habitat. Up to now, the effect of habitat tracking on foraminifera proxy records has not yet been formally quantified on a global scale. Here we attempt to characterise this effect on the amplitude of environmental change recorded in sedimentary PF using core top δ 18 O data from six species. We find that the offset from mean annual near-surface δ 18 O values varies with temperature, with PF δ 18 O indicating warmer than mean conditions in colder waters (on average by −0.1 ‰ (equivalent to 0.4 °C) per °C), thus providing a first-order quantification of the degree of underestimation due to habitat tracking. We use an empirical model to estimate the contribution of seasonality to the observed difference between PF and annual mean δ 18 O and use the residual Δ δ 18 O to assess trends in calcification depth. Our analysis indicates that given an observation-based model parametrisation calcification depth increases with temperature in all species and sensitivity analysis suggests that a temperature-related seasonal habitat adjustment is essential to explain the observed isotope signal. Habitat tracking can thus lead to a significant reduction in the amplitude of recorded environmental change. However, we show that this behaviour is predictable. This allows accounting ... |
format |
Article in Journal/Newspaper |
author |
L. Jonkers M. Kučera |
author_facet |
L. Jonkers M. Kučera |
author_sort |
L. Jonkers |
title |
Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies |
title_short |
Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies |
title_full |
Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies |
title_fullStr |
Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies |
title_full_unstemmed |
Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies |
title_sort |
quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-573-2017 https://doaj.org/article/46c1534d1fda40239569bf07d1910ef1 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Climate of the Past, Vol 13, Pp 573-586 (2017) |
op_relation |
http://www.clim-past.net/13/573/2017/cp-13-573-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-573-2017 1814-9324 1814-9332 https://doaj.org/article/46c1534d1fda40239569bf07d1910ef1 |
op_doi |
https://doi.org/10.5194/cp-13-573-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
6 |
container_start_page |
573 |
op_container_end_page |
586 |
_version_ |
1766170495761252352 |