Redox Metabolism During Aerial Exposure of the Sea Urchin <i>Echinometra lucunter</i>: An Ecophysiological Perspective.

ABSTRACT: Intertidal organisms experience daily environmental fluctuations, including changes in temperature, UV radiation, and aerial exposure during low tide, requiring physiological strategies for survival. One adaptation is the "preparation for oxidative stress" (POS), where antioxidants are upregulated preemptively to mitigate oxidative damage. While POS has been documented in over 120 species, in the case of intertidal species, most studies focus on single stressors under controlled-laboratory conditions. This study investigated POS in the sea urchin Echinometra lucunter under natural multi-stress conditions. Sampling occurred over a single day (from 5 a.m. to noon), analyzing three conditions: submerged (S), aerially exposed for 2 h (AE), and reimmersed for 2 h (R). There was a ~4 °C t

SUBMITTER: Pereira TM 

PROVIDER: S-EPMC12070949 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature