10 Mar 2020
10 Mar 2020
Spring distribution of shelled pteropods across the Mediterranean Sea
- 1Institut de Ciència i Tecnologia Ambientals, Universitat Autònoma de Barcelona, Barcelona, Spain
- 2The British Antarctic Survey, Cambridge, UK
- 3Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
- 1Institut de Ciència i Tecnologia Ambientals, Universitat Autònoma de Barcelona, Barcelona, Spain
- 2The British Antarctic Survey, Cambridge, UK
- 3Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
Abstract. Shelled pteropods represent an excellent sentinel for indicating exposure to ocean acidification (OA). Here, for the first time, we characterise spring pteropod distribution throughout the Mediterranean Sea, a region that has been identified as a climate change hot-spot. The presence of a west–east natural biogeochemical gradient makes this region a natural laboratory to investigate how the variability in environmental parameters may affect pteropod distribution. Results show that pteropod abundance is significantly higher in the eastern Mediterranean Sea where there is a higher aragonite saturation state (Ωar), showing that distribution is positively correlated with Ωar. We also observed a resilience of pteropods to higher temperatures and low nutrient conditions, including phosphorous limitation. The higher abundance of pteropods in ultra-oligotrophic conditions (eastern Mediterranean Sea) suggests that this organism can play an important role as the prime calcifying zooplankton within specific oligotrophic regions.
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Roberta Johnson et al.


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RC1: 'Review of Johnson et al Spring distribution of shelled pteropods across the Mediterranean Sea', Anonymous Referee #1, 16 Mar 2020
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AC1: 'Response to Referee 1', Roberta Johnson, 12 Jun 2020
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AC1: 'Response to Referee 1', Roberta Johnson, 12 Jun 2020
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RC2: 'Review BG2020-53', Anonymous Referee #2, 07 Apr 2020
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AC2: 'Response to Referee 2', Roberta Johnson, 12 Jun 2020
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AC2: 'Response to Referee 2', Roberta Johnson, 12 Jun 2020
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RC3: 'A review of the paper on pteropod and foramenifera distribution in the Mediterranean basin', Anonymous Referee #3, 11 Apr 2020
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AC3: 'Response to Referee 3', Roberta Johnson, 12 Jun 2020
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AC3: 'Response to Referee 3', Roberta Johnson, 12 Jun 2020


-
RC1: 'Review of Johnson et al Spring distribution of shelled pteropods across the Mediterranean Sea', Anonymous Referee #1, 16 Mar 2020
-
AC1: 'Response to Referee 1', Roberta Johnson, 12 Jun 2020
-
AC1: 'Response to Referee 1', Roberta Johnson, 12 Jun 2020
-
RC2: 'Review BG2020-53', Anonymous Referee #2, 07 Apr 2020
-
AC2: 'Response to Referee 2', Roberta Johnson, 12 Jun 2020
-
AC2: 'Response to Referee 2', Roberta Johnson, 12 Jun 2020
-
RC3: 'A review of the paper on pteropod and foramenifera distribution in the Mediterranean basin', Anonymous Referee #3, 11 Apr 2020
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AC3: 'Response to Referee 3', Roberta Johnson, 12 Jun 2020
-
AC3: 'Response to Referee 3', Roberta Johnson, 12 Jun 2020
Roberta Johnson et al.
Roberta Johnson et al.
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