Manno Clara

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Manno
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Clara
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  • Article
    Shelled pteropods in peril : assessing vulnerability in a high CO2 ocean
    (Elsevier, 2017-04-09) Manno, Clara ; Bednarsek, Nina ; Tarling, Geraint A. ; Peck, Vicky L. ; Comeau, Steeve ; Adhikari, Deepak ; Bakker, Dorothee ; Bauerfeind, Eduard ; Bergan, Alexander J. ; Berning, Maria I. ; Buitenhuis, Erik T. ; Burridge, Alice K. ; Chierici, Melissa ; Flöter, Sebastian ; Fransson, Agneta ; Gardner, Jessie ; Howes, Ella L. ; Keul, Nina ; Kimoto, Katsunori ; Kohnert, Peter ; Lawson, Gareth L. ; Lischka, Silke ; Maas, Amy E. ; Mekkes, Lisette ; Oakes, Rosie L. ; Pebody, Corinne ; Peijnenburg, Katja T. C. A. ; Seifert, Miriam ; Skinner, Jennifer ; Thibodeau, Patricia S. ; Wall-Palmer, Deborah ; Ziveri, Patrizia
    The impact of anthropogenic ocean acidification (OA) on marine ecosystems is a vital concern facing marine scientists and managers of ocean resources. Euthecosomatous pteropods (holoplanktonic gastropods) represent an excellent sentinel for indicating exposure to anthropogenic OA because of the sensitivity of their aragonite shells to the OA conditions less favorable for calcification. However, an integration of observations, experiments and modelling efforts is needed to make accurate predictions of how these organisms will respond to future changes to their environment. Our understanding of the underlying organismal biology and life history is far from complete and must be improved if we are to comprehend fully the responses of these organisms to the multitude of stressors in their environment beyond OA. This review considers the present state of research and understanding of euthecosomatous pteropod biology and ecology of these organisms and considers promising new laboratory methods, advances in instrumentation (such as molecular, trace elements, stable isotopes, palaeobiology alongside autonomous sampling platforms, CT scanning and high-quality video recording) and novel field-based approaches (i.e. studies of upwelling and CO2 vent regions) that may allow us to improve our predictive capacity of their vulnerability and/or resilience. In addition to playing a critical ecological and biogeochemical role, pteropods can offer a significant value as an early-indicator of anthropogenic OA. This role as a sentinel species should be developed further to consolidate their potential use within marine environmental management policy making.
  • Article
    Pelagic calcium carbonate production and shallow dissolution in the North Pacific Ocean
    (Nature Research, 2023-02-20) Ziveri, Patrizia ; Gray, William Robert ; Anglada-Ortiz, Griselda ; Manno, Clara ; Grelaud, Michael ; Incarbona, Alessandro ; Rae, James William Buchanan ; Subhas, Adam V. ; Pallacks, Sven ; White, Angelicque ; Adkins, Jess F. ; Berelson, William
    Planktonic calcifying organisms play a key role in regulating ocean carbonate chemistry and atmospheric CO. Surprisingly, references to the absolute and relative contribution of these organisms to calcium carbonate production are lacking. Here we report quantification of pelagic calcium carbonate production in the North Pacific, providing new insights on the contribution of the three main planktonic calcifying groups. Our results show that coccolithophores dominate the living calcium carbonate (CaCO) standing stock, with coccolithophore calcite comprising ~90% of total CaCO production, and pteropods and foraminifera playing a secondary role. We show that pelagic CaCO production is higher than the sinking flux of CaCO at 150 and 200 m at ocean stations ALOHA and PAPA, implying that a large portion of pelagic calcium carbonate is remineralised within the photic zone; this extensive shallow dissolution explains the apparent discrepancy between previous estimates of CaCO production derived from satellite observations/biogeochemical modeling versus estimates from shallow sediment traps. We suggest future changes in the CaCO cycle and its impact on atmospheric CO will largely depend on how the poorly-understood processes that determine whether CaCO is remineralised in the photic zone or exported to depth respond to anthropogenic warming and acidification.