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29 April 2019 Opportunistic Species and Seasonal Variation in Epiphytic Foraminiferal Assemblages in Abalone Farm Nets
Yang Ho Choi, Da Un Jeong, Yeon Gyu Lee, Jae Ung Choi, Shin Kim, Jung Sick Lee
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Abstract

Choi, Y.H.; Jeong, D.U.; Lee, Y.G.; Choi, J.U.; Kim, S., and Lee, J.S., 2019. Opportunistic species and seasonal variation in epiphytic foraminiferal assemblages in abalone farm nets. Journal of Coastal Research, 35(3), 559–573. Coconut Creek (Florida), ISSN 0749-0208.

Monitoring of dissolved oxygen (DO), temperature, and epiphytic foraminifera on seagrass in the nets of abalone farms in three areas (Haenam, Pyeongildo, Soando) with different seawater movement was conducted between April 2016 and January 2017. The aim was to identify the opportunistic species, seasonal variation, relationships with DO, and temperature of epiphytic foraminiferal assemblages under environmental conditions affected by the biodeposits discharged from abalone farming. The results showed that the highest relative abundance of epiphytic foraminifera occurred in September (22.96°C), although the temperature was highest in August (24.37°C); this may be related to the consistently stable high temperatures during this time (22–23°C). There was no direct relationship between DO and epiphytic foraminiferal assemblages. Rosalina bradyi (frequency: 78.6%; species diversity: 0.96; distributed across three areas in July) was found to be an opportunistic species for nutrient enrichment discharged from abalone farming. Epiphytic foraminiferal assemblages of the three areas were varied, from the R. bradyi assemblage in July, to the R. bradyiCornuspira involvens or R. bradyiMurrayinella minuta assemblages in August and September, and to the Glabratella sp.–R. bradyi or Epistominella naraensisR. bradyi assemblages of January. Species diversity was also increased. It is thought that this seasonal variation in epiphytic foraminiferal assemblages may be a process needed to maintain a stable epibiosis in epiphytic foraminifera.

©Coastal Education and Research Foundation, Inc. 2019
Yang Ho Choi, Da Un Jeong, Yeon Gyu Lee, Jae Ung Choi, Shin Kim, and Jung Sick Lee "Opportunistic Species and Seasonal Variation in Epiphytic Foraminiferal Assemblages in Abalone Farm Nets," Journal of Coastal Research 35(3), 559-573, (29 April 2019). https://doi.org/10.2112/JCOASTRES-D-18-00057.1
Received: 18 April 2018; Accepted: 9 August 2018; Published: 29 April 2019
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KEYWORDS
abalone farming
Epiphytic foraminifera
Rosalina bradyi
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