Effects of potential future CO2 levels in seawater on emerging behaviour and respiration of Manila clams, Venerupis philippinarum SCIE SCOPUS

Cited 9 time in WEB OF SCIENCE Cited 10 time in Scopus
Title
Effects of potential future CO2 levels in seawater on emerging behaviour and respiration of Manila clams, Venerupis philippinarum
Author(s)
Lee, Jung-Ah; Kim, Tae Won
Publication Year
2017-05
Abstract
High atmospheric CO2 dissolves into the surface of the ocean and lowers the pH of seawater and is thus expected to pose a potential threat to various marine organisms. We investigated the physiological and behavioural responses of adult Manila clams, Venerupis philippinarum (n=96, shell length 25.32 +/- 1.66mm and total wet weight 3.10 +/- 0.54 g), to three levels (400, 700, and 900 mu atm) of CO2 partial pressure (pCO(2)) for 48 days. There were no significant differences in mortality, growth, respiration rate, or emergence from the sediment between the three levels, indicating that near future atmospheric levels of CO2 do not seem to have a serious effect on the physiology and behaviour of adult Manila clams. However, Manila clams could be exposed to notably higher pCO(2) and lower pH levels at local conditions due to the other issues, including eutrophication. Thus, the younger clams (n=240, shell length 16.71 +/- 0.96mm and total wet weight 0.70 +/- 0.13 g) were exposed to pCO(2) levels of 900 mu atm (pH 7.8) and higher, such as 1300 and 2300 mu atm (pH 7.7 and 7.5, respectively), for 39 days. Although mortality and growth were not significantly different between treatments, the emergence rates at the two higher pCO(2) levels were higher than that at the lowest level during the last 10 days of the experiment. The oxygen consumption rate (OCR) was reduced after 39 days of exposure to 2300 mu atm of pCO(2). The increase in emerging behaviour and the decrease in the rate of oxygen consumption indicated worse physiological conditions of the clams; the population may be negatively influenced due to worse conditions or increased probability of predation.
ISSN
1054-3139
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2262
DOI
10.1093/icesjms/fsw124
Bibliographic Citation
ICES JOURNAL OF MARINE SCIENCE, v.74, no.4, pp.1013 - 1020, 2017
Publisher
OXFORD UNIV PRESS
Subject
OCEAN ACIDIFICATION; HYPOXIA; IMPACT; GROWTH; WATER; RESPONSES; DYNAMICS; EXPOSURE; LESSONS; PCO(2)
Keywords
behaviour; growth; Manila clam; ocean acidification; oxygen consumption rate; Venerupis philippinarum
Type
Article
Language
English
Document Type
Article
Publisher
OXFORD UNIV PRESS
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