期刊
MARINE ECOLOGY PROGRESS SERIES
卷 523, 期 -, 页码 93-103出版社
INTER-RESEARCH
DOI: 10.3354/meps11199
关键词
Pteropoda; Ocean fronts; Vertical distribution; Shell dissolution
资金
- National Research Council
- NOAA Pacific Marine Environmental Laboratory
- NOAA Ocean Acidification Program
- NSF
- US NSF
- Division Of Ocean Sciences
- Directorate For Geosciences [1026607] Funding Source: National Science Foundation
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 (Omega(arag) = 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 Omega(arag) saturation state. Severe shell dissolution ( categorized here as Type II and Type III) was low in near-surface waters where Omega(arag) > 1.4, while peak dissolution occurred in depths where Omega(arag) = 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.
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