Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System
We tested the sensitivity of the vertical distributions and shell dissolution patterns of thecosome pteropods to spatial gradients associated with an eddy-associated front in the southern California Current System. The aragonite saturation horizon (Ωarag = 1.0) shoaled from >200 to <75 m depth...
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ftcdlib:oai:escholarship.org/ark:/13030/qt8jc0t2vg 2023-05-15T17:08:02+02:00 Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System Bednaršek, N Ohman, MD 2015-03-16 application/pdf https://escholarship.org/uc/item/8jc0t2vg unknown eScholarship, University of California qt8jc0t2vg https://escholarship.org/uc/item/8jc0t2vg public Pteropoda Ocean fronts Vertical distribution Shell dissolution Marine Biology & Hydrobiology Oceanography Ecology Zoology article 2015 ftcdlib 2021-10-25T17:15:33Z We tested the sensitivity of the vertical distributions and shell dissolution patterns of thecosome pteropods to spatial gradients associated with an eddy-associated front in the southern California Current System. The aragonite saturation horizon (Ωarag = 1.0) shoaled from >200 to <75 m depth across the front. The vertical distribution of thecosome pteropods tracked these changes, with all 5 species showing reduced occurrence at depths below 100 m where waters were less saturated with respect to aragonite. Shell dissolution patterns of the numerically dominant thecosome Limacina helicina corresponded to the cross-frontal changes in Ωarag saturation state. Severe shell dissolution (categorized here as Type II and Type III) was low in near-surface waters where Ωarag > 1.4, while peak dissolution occurred in depths where Ωarag = 1.0 to 1.4. Vertical habitat compression and increased shell dissolution may be expected to accompany future shoaling of waters that are undersaturated with respect to aragonite. Article in Journal/Newspaper Limacina helicina University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Pteropoda Ocean fronts Vertical distribution Shell dissolution Marine Biology & Hydrobiology Oceanography Ecology Zoology |
spellingShingle |
Pteropoda Ocean fronts Vertical distribution Shell dissolution Marine Biology & Hydrobiology Oceanography Ecology Zoology Bednaršek, N Ohman, MD Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System |
topic_facet |
Pteropoda Ocean fronts Vertical distribution Shell dissolution Marine Biology & Hydrobiology Oceanography Ecology Zoology |
description |
We tested the sensitivity of the vertical distributions and shell dissolution patterns of thecosome pteropods to spatial gradients associated with an eddy-associated front in the southern California Current System. The aragonite saturation horizon (Ωarag = 1.0) shoaled from >200 to <75 m depth across the front. The vertical distribution of thecosome pteropods tracked these changes, with all 5 species showing reduced occurrence at depths below 100 m where waters were less saturated with respect to aragonite. Shell dissolution patterns of the numerically dominant thecosome Limacina helicina corresponded to the cross-frontal changes in Ωarag saturation state. Severe shell dissolution (categorized here as Type II and Type III) was low in near-surface waters where Ωarag > 1.4, while peak dissolution occurred in depths where Ωarag = 1.0 to 1.4. Vertical habitat compression and increased shell dissolution may be expected to accompany future shoaling of waters that are undersaturated with respect to aragonite. |
format |
Article in Journal/Newspaper |
author |
Bednaršek, N Ohman, MD |
author_facet |
Bednaršek, N Ohman, MD |
author_sort |
Bednaršek, N |
title |
Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System |
title_short |
Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System |
title_full |
Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System |
title_fullStr |
Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System |
title_full_unstemmed |
Changes in pteropod distributions and shell dissolution across a frontal system in the California Current System |
title_sort |
changes in pteropod distributions and shell dissolution across a frontal system in the california current system |
publisher |
eScholarship, University of California |
publishDate |
2015 |
url |
https://escholarship.org/uc/item/8jc0t2vg |
genre |
Limacina helicina |
genre_facet |
Limacina helicina |
op_relation |
qt8jc0t2vg https://escholarship.org/uc/item/8jc0t2vg |
op_rights |
public |
_version_ |
1766063595800494080 |