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      Effects of ocean acidification and warming on the larval development of the spider crab Hyas araneus from different latitudes (54° vs. 79°N)

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      General Information:

      Citation:
      Walther, K. , Anger, K. and Pörtner, H. O. (2010): Effects of ocean acidification and warming on the larval development of the spider crab Hyas araneus from different latitudes (54° vs. 79°N) , Marine Ecology Progress Series, 417170., 159 . doi: 10.3354/meps08807
      Cite this page as:
      hdl:10013/epic.36198
      DOI:
      10.3354/meps08807
      Official URL:
      10.3354/meps08807
      Contact Email:
      Kathleen.Walther@awi.de
      Related Data:

      Abstract:

      The combined effects of predicted ocean acidification and global warming on the larvae of the cold-eurythermal spider crab Hyas araneus L. were investigated in 2 populations: a southernmost around Helgoland (North Sea, 54°N) and a northernmost at Svalbard (North Atlantic, 79°N). Larvae were exposed at temperatures of 3, 9 and 15°C to present day normocapnia (380 ppm CO2) and to CO2 conditions predicted for the near or medium-term future (710 ppm by the year 2100, 3000 ppm by 2300 and beyond). Larval development time, growth and C/N ratio were studied in the larval stages Zoea I, II, and Megalopa. Permanent differences in instar duration between both populations were detected in all stages, likely as a result of evolutionary temperature adaptation. With the exception of Zoea II at 3°C and under all CO2 conditions, development in all instars from Svalbard was delayed compared to those from Helgoland. Most prominently, development was much longer and fewer specimens morphosed to the first crab instar in the Megalopa from Svalbard than from Helgoland. Enhanced CO2 levels (particularly 3000 ppm) extended the duration of larval development and reduced larval growth (measured as dry mass) and fitness (decreasing C/N ratio, a proxy of the lipid content). Such effects were strongest in the zoeal stages of Svalbard larvae, and during the Megalopa instar of Helgoland larvae. The high sensitivity of megalopae from the Svalbard population to warming and of those from Helgoland to enhanced CO2 levels suggests that this larval instar is a physiologically sensitive bottleneck within the life cycle of H. araneus.

      Further Details:

      Item Type:
      Article
      Authors:
      Walther, Konrad ; Anger, Klaus ; Pörtner, Hans-Otto
      Divisions:
      AWI Organizations > Biosciences > Integrative Ecophysiology
      AWI Organizations > Biosciences > Shelf Sea System Ecology
      Programs:
      Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 1: The Changing Arctic and Antarctic
      Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 1: The Changing Arctic and Antarctic > WP 1.6: Ocean Warming and Acidification: Organisms and their changing Role in Marine Ecosystems
      Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 2: Coastal Change
      Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 2: Coastal Change > WP 2.2: Integrating evolutionary Ecology into Coastal and Shelf Processes
      Eprint ID:
      23088
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