Ecophysiology of native and alien invasive clams in an ocean warming context

Patricia Anacleto, Ana Luisa Maulvault, Vanessa M. Lopes, Tiago Repolho, Mário Emanuel Campos de Sousa Diniz, Maria Leonor Nunes, António Marques, Rui Rosa

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Both climate change and biological invasions are among the most serious global environmental threats. Yet mechanisms underlying these eventual interactions remain unclear. The aim of this study was to undertake a comprehensive examination of the physiological and biochemical responses of native (Ruditapes decussatus) and alien invasive (Ruditapes philippinarum) clams to environmental warming. We evaluated thermal tolerance limits (CTMax), routine metabolic rates (RMR) and respective thermal sensitivity (Q10 values), critical oxygen partial pressure (Pcrit), heat shock response (HSP70/HSC70 levels), lipid peroxidation (MDA build-up) and antioxidant enzyme [glutathione-S-transferase (GST), catalase (CAT) and superoxide dismutase (SOD)] activities. Contrary to most studies that show that invasive species have a higher thermal tolerance than native congeners, here we revealed that the alien invasive and native species had similar CTMax values. However, warming had a stronger effect on metabolism and oxidative status of the native R. decussatus, as indicated by the higher RMR, HSP70/HSC70 and MDA levels, as well as GST, CAT and SOD activities. Moreover, we argue that the alien invasive clams, instead of up-regulating energetically expensive cellular responses, have evolved a less demanding strategy to cope with short-term environmental (oxidative) stress - pervasive valve closure. Although efficient during stressful short-term periods to ensure isolation and guarantee longer survival, such adaptive behavioural strategy entails metabolic arrest (and the enhancement of anaerobic pathways), which to some extent, will not be advantageous under the chronically warming conditions predicted in the future.
Original languageEnglish
Pages (from-to)28-37
JournalComparative biochemistry and physiology. Part A, Molecular & integrative physiology
Volume175
DOIs
Publication statusPublished - Sep 2014

Fingerprint

Bivalvia
Oceans and Seas
Introduced Species
Glutathione Transferase
Catalase
Superoxide Dismutase
Heat-Shock Response
Partial Pressure
Climate Change
Lipid Peroxidation
Oxidative Stress
Antioxidants
Hot Temperature
Oxygen
Survival
Enzymes
Thermotolerance

Keywords

  • Biological invasions
  • Metabolism
  • Oxidative stress
  • Ruditapes decussatus
  • Ruditapes philippinarum
  • Thermal tolerance

Cite this

Anacleto, Patricia ; Maulvault, Ana Luisa ; Lopes, Vanessa M. ; Repolho, Tiago ; Diniz, Mário Emanuel Campos de Sousa ; Nunes, Maria Leonor ; Marques, António ; Rosa, Rui. / Ecophysiology of native and alien invasive clams in an ocean warming context. In: Comparative biochemistry and physiology. Part A, Molecular & integrative physiology. 2014 ; Vol. 175. pp. 28-37.
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Ecophysiology of native and alien invasive clams in an ocean warming context. / Anacleto, Patricia; Maulvault, Ana Luisa; Lopes, Vanessa M.; Repolho, Tiago; Diniz, Mário Emanuel Campos de Sousa; Nunes, Maria Leonor; Marques, António; Rosa, Rui.

In: Comparative biochemistry and physiology. Part A, Molecular & integrative physiology, Vol. 175, 09.2014, p. 28-37.

Research output: Contribution to journalArticle

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AU - Anacleto, Patricia

AU - Maulvault, Ana Luisa

AU - Lopes, Vanessa M.

AU - Repolho, Tiago

AU - Diniz, Mário Emanuel Campos de Sousa

AU - Nunes, Maria Leonor

AU - Marques, António

AU - Rosa, Rui

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KW - Oxidative stress

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KW - Ruditapes philippinarum

KW - Thermal tolerance

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