Multigenerational Life-History Responses to pH in Distinct Populations of the Copepod <i>Tigriopus californicus</i>

Liguori, Alyssa

doi:10.1086/719573

Cited by 1 publication

(1 citation statement)

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“…Several copepod species exhibit signs of sublethal stress to ocean acidification when it is paired with higher temperatures [ 33 , 34 ] although T . californicus may be adapted to lower pH than is common in coastal waters [ 35 ]. Thus, we expected that southern populations of T .…”

Section: Introductionmentioning

confidence: 99%

Hypoxia tolerance, but not low pH tolerance, is associated with a latitudinal cline across populations of Tigriopus californicus

Deconinck

Willett²

2022

PLoS ONE

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Intertidal organisms must tolerate daily fluctuations in environmental parameters, and repeated exposure to co-occurring conditions may result in tolerance to multiple stressors correlating. The intertidal copepod Tigriopus californicus experiences diurnal variation in dissolved oxygen levels and pH as the opposing processes of photosynthesis and cellular respiration lead to coordinated highs during the day and lows at night. While environmental parameters with overlapping spatial gradients frequently result in correlated traits, less attention has been given to exploring temporally correlated stressors. We investigated whether hypoxia tolerance correlates with low pH tolerance by separately testing the hypoxia and low pH stress tolerance separately of 6 genetically differentiated populations of T. californicus. We independently checked for similarities in tolerance for each of the two stressors by latitude, sex, size, and time since collection as predictors. We found that although hypoxia tolerance correlated with latitude, low pH tolerance did not, and no predictor was significant for both stressors. We concluded that temporally coordinated exposure to low pH and low oxygen did not result in populations developing equivalent tolerance for both. Although climate change alters several environmental variables simultaneously, organisms’ abilities to tolerate these changes may not be similarly coupled.

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Section: Introductionmentioning

confidence: 99%