Effects of Hypoxia on the Distribution of Calanoid Copepod Eggs in the Seabed Sediments of the Eutrophic Masan Bay, Korea SCIE SCOPUS

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Title
Effects of Hypoxia on the Distribution of Calanoid Copepod Eggs in the Seabed Sediments of the Eutrophic Masan Bay, Korea
Author(s)
Choi, Seo Yeol; Hyun, Bong Gil; Jang, Pung Guk; Shin, Kyoung Soon; Soh, Ho Young; Kang, Jung Hoon; Jang, Min Chul
KIOST Author(s)
Hyun, Bonggil(현봉길)Jang, Pung Guk(장풍국)Shin, Kyoung Soon(신경순)Kang, Jung Hoon(강정훈)
Alternative Author(s)
현봉길; 장풍국; 신경순; 강정훈; 장민철
Publication Year
2021-11
Abstract
In this study, we investigate the distribution of calanoid copepod eggs in the sediments of Masan Bay (South Sea, Korea), in which hypoxic conditions occur every summer. In August (2011), hypoxia was observed at all stations, while normoxia was observed in April (2012). The pH and hydrogen sulphide concentration at the sediment-water interface in the inner bay during August were 7.7 and >20 mol L−1, respectively, and there was no significant difference between the stations in April. The abundance of eggs in the sediment ranged from 0.69 to 1.49 × 106 eggs m−2 in August, and from 0.59 to 1.08 × 106 eggs m−2 in April. Notably, the proportion of abnormal eggs was high (a maximum of 77.1%) in August, and a uniform distribution of normal eggs (>80%) was observed in April. A generation of abnormal eggs hatched with deformed nauplii in Masan Bay during the summer, and a failure to hatch was likely due to the high H2S concentration and low pH caused by hypoxia. In this paper, we discuss the effects of hypoxia and seabed environments on the hatching success of calanoid copepod eggs.
ISSN
2073-4441
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41685
DOI
10.3390/w13213116
Bibliographic Citation
Water (Switzerland), v.13, no.21, 2021
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Keywords
copepods; egg hatching; hypoxic sediments; resting egg; normoxia
Type
Article
Language
English
Document Type
Article
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
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