期刊
BIOLOGY LETTERS
卷 18, 期 6, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsbl.2022.0087
关键词
climate change; echinoderm; ocean warming; thermal tolerance; CO2 vents; Mediterranean Sea
As the ocean warms, the thermal tolerance of marine invertebrates plays a key role in determining their distributional change. Comparison of sea urchin progeny from low pH-acclimated and ambient pH populations showed that low pH acclimation did not impact the broad thermal tolerance of the sea urchin, indicating its potential as an important ecological engineer in a changing ocean.
As the ocean warms, the thermal tolerance of marine invertebrates is key to determining their distributional change, where acclimation to low pH may impact the thermal range of optimal development. We compared thermal tolerance of progeny from a low pH-acclimated sea urchin (Arbacia lixula) population from the CO2 vents of Ischia (Italy) and a nearby population living at ambient pH. The percentages of normally developing gastrulae and two-armed larvae were determined across 10 temperatures representing present and future temperature conditions (16-34 degrees C). Vent-acclimated sea urchins showed a greater percentage of normal development at 24 h, with a larger optimal developmental temperature range than control sea urchins (12.3 degrees C versus 5.4 degrees C range, respectively). At 48 h, upper lethal temperatures for 50% survival with respect to ambient temperatures were similar between control (+6.8 degrees C) and vent (+6.2 degrees C) populations. Thus, acclimation to low pH did not impact the broad thermal tolerance of A. lixula progeny. With A. lixula's barrens-forming abilities, its wide thermotolerance and its capacity to acclimate to low pH, this species will continue to be an important ecological engineer in Mediterranean macroalgal ecosystems in a changing ocean.
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