Physiological responses and scope for growth upon medium-term exposure to the combined effects of ocean acidification and temperature in a subtidal scavenger Nassarius conoidalis

Marine Environmental Research
Haoyu ZhangS G Cheung

Abstract

Physiological responses (ingestion rate, absorption rate and efficiency, respiration, rate, excretion rate) and scope for growth of a subtidal scavenging gastropod Nassarius conoidalis under the combined effects of ocean acidification (pCO2 levels: 380, 950, 1250 μatm) and temperature (15, 30 °C) were investigated for 31 days. There was a significant reduction in all the physiological rates and scope for growth following short-term exposure (1-3 days) to elevated pCO2 except absorption efficiency at 15 °C and 30 °C, and respiration rate and excretion rate at 15 °C. The percentage change in the physiological rates ranged from 0% to 90% at 15 °C and from 0% to 73% at 30 °C when pCO2 was increased from 380 μatm to 1250 μatm. The effect of pCO2 on the physiological rates was enhanced at high temperature for ingestion, absorption, respiration and excretion. When the exposure period was extended to 31 days, the effect of pCO2 was significant on the ingestion rate only. All the physiological rates remained unchanged when temperature increased from 24 °C to 30 °C but the rates at 15 °C were significantly lower, irrespective of the duration of exposure. Our data suggested that a medium-term exposure to ocean acidification has no effect ...Continue Reading

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Citations

Feb 28, 2016·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Xian XuXiwu Yan
Mar 27, 2020·Scientific Reports·Isabel B OliveiraSusana Galante-Oliveira
Dec 7, 2016·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·L S StappG Lannig
Feb 15, 2020·Marine Environmental Research·Alessandra Paula CarneiroPaulo Roberto Pagliosa
Jan 13, 2021·Nature Ecology & Evolution·Eduardo SampaioRui Rosa
May 19, 2021·Environmental Research·Belén Marín RodríguezMercedes Conradi

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