Vulnerability of juvenile hermit crabs to reduced seawater pH and shading

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Fersiynau electronig


  • 2018_MERE_OA_Shading_Accepted

    Llawysgrif awdur wedi’i dderbyn, 613 KB, dogfen-PDF

    Embargo yn dod i ben: 6/10/19

    Trwydded: CC BY-NC-ND Dangos trwydded

Dangosydd eitem ddigidol (DOI)

  • Marilia Ragagnin
    University of Sao Paulo
  • Ian McCarthy
  • Wellington Fernandez
    University of Sao Paolo
  • Andre Tschiptschin
    University of Sao Paolo
  • Alexander Turra
    University of Sao Paolo
Multiple simultaneous stressors induced by anthropogenic activities may amplify their impacts on marine organisms. The effects of ocean acidification, in combination with other anthropogenic impacts (apart from temperature) are poorly understood, especially in coastal regions. In these areas, shading caused by infrastructure development, such as harbor construction, may potentially interact with CO2-induced pH reduction and affect invertebrate populations. Here, we evaluated the effects of reduced pH (7.6) and shading (24h in darkness) on mortality, growth, calcification and displacement behavior to live predator (danger signal) and dead gastropod (resource availability signal) odors using juveniles of the hermit crab Pagurus criniticornis collected in Araçá Bay (São Paulo state, Southeastern Brazil). After a 98 day experimental period, both stressors had a significant interaction effect on mortality, and an additive effect on total growth. No difference in calcification was recorded among treatments, indicating that individuals were able to maintain calcification under reduced pH conditions. When exposed to odor of live predators, crab responses were only affected by shading. However, an interactive effect between both stressors was observed in response to gastropod odor, leading to reduced displacement behavior. This study shows how local disturbance impacts may enhance the effects of global environmental change on intertidal crustacean populations.


Iaith wreiddiolSaesneg
Tudalennau (o-i)130-140
CyfnodolynMarine Environmental Research
Dyddiad ar-lein cynnar6 Hyd 2018
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - Tach 2018
Gweld graff cysylltiadau