Picocyanobacterial abundances and diversity in surface water of the northwestern Pacific Ocean

Choi, Dong Han; Noh, Jae Hoon; Hahm, Mi-Seon; Lee, Charity Mijin

doi:10.1007/s12601-011-0020-0

Cited by 24 publications

(18 citation statements)

References 28 publications

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“…In a previous picocyanobacterial diversity study conducted in surface samples from the NEC area, we could obtain only a small number of Synechococcus sequences, with less than 30 reads (8). In this study, on the contrary, ca.…”

Section: Resultsmentioning

confidence: 99%

Application of Pyrosequencing Method for Investigating the Diversity of <i>Synechococcus</i> Subcluster 5.1 in Open Ocean

2014

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Synechococcus are distributed throughout the world’s oceans and are composed of diverse genetic lineages. However, as they are much less abundant than Prochlorococcus in oligotrophic open oceans, their in-depth genetic diversity cannot be investigated using commonly used primers targeting both Prochlorococcus and Synechococcus. Thus, in this study, we designed a primer specific to the 16S–23S rRNA internal transcribed spacer (ITS) of the Synechococcus subcluster 5.1. Using the primer, we could selectively amplify Synechococcus sequences in oligotrophic seawater samples. Further, we showed that a barcoded amplicon pyrosequencing method could be applicable to investigate Synechococcus diversity using sequences retrieved in GenBank and obtained from environmental samples. Allowing sequence analyses of a large number of samples, this high-throughput method would be useful to study global biodiversity and biogeographic patterns of Synechococcus in marine environments.

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Section: Resultsmentioning

confidence: 99%

Application of Pyrosequencing Method for Investigating the Diversity of <i>Synechococcus</i> Subcluster 5.1 in Open Ocean

2014

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“…This allows for more efficient transfer of organic matter through short food chains towards upper trophic levels in the spring and autumn (Hairston and Hairston 1993). In contrast, picoand nanoplankton dominate in stagnant waters such as open sea areas or stratified waters during the summer (Chisholm 1992;Choi et al 2011). In the East Sea, Kwak et al (2013) reported that the microplankton contribution decreases in the summer when pico-and nanoplankton prevail.…”

Section: Discussionmentioning

confidence: 99%

Evidence for ontogenetic feeding strategies in four calanoid copepods in the East Sea (Japan Sea) in summer, revealed by stable isotope analysis

Wi²,

Suh

2015

Ocean Sci. J.

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 Deciphering the ontogenetic feeding ecology of copepods is essential to understanding their role in the energy transfer of marine ecosystems. We used stable isotope analysis to examine the ontogenetic feeding strategies of the four coexisting calanoid copepods, Mesocalanus tenuicornis, Metridia pacifica, Calanus sinicus, and Neocalanus plumchrus, in the East Sea (Japan Sea) in summer. Moreover, we used the stable carbon and nitrogen isotope composition of small-sized plankton in three cell size fractions, pico-(< 2 μm), nano-(2-20 μm) and microplankton (20-200 μm), to identify the dietary preference at each developmental stage. The relative carbon masses of pico-, nano-and microplankton were 18, 38, and 44%, respectively, and their δ 13 C and δ 15 N values gradually increased with increasing size classes. The ontogenetic trophic position of four copepods were relatively low and ranged from 2.1 to 2.6, indicating that herbivores feed on small-sized phytoplankton, pico-and nanoplankton. Among copepodid stages, the δ 13 C and δ 15 N values of M. tenuicornis and C. sinicus differed significantly, while those of M. pacifica and N. plumchrus were not significantly different. In M. tenuicornis, the smallest species among the four copepods examined, the diet preference of CIV for picoplankton changed to nanoplankton in the adult stage. When M. pacifica developed from CIV to adult, the diet preference changed from pico-to microplankton. The proportion of microplankton in the diet of C. sinicus and N. plumchrus increased from CIV to female adult and from CIII to CV, respectively. During the developmental progress in copepodid stages, the smaller copepods significantly changed their dietary preference from pico-to microplankton, while the larger copepods consistently fed on microplankton. We suggest that smaller copepods have an advantage in survival at early copepodid stages compared with larger copepods in summer when microplankton biomass is relatively low.

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“…초미소남세균 중 Synechococcus와 Prochlorococcus는 해양에서 가장 우점하며, 해역 및 시기에 따라 차이는 있지만, 해양 생태계에서 중요한 일차생산자로 이미 잘 알려 져 있다 (Li, 1994;Liu et al, 1997;Teira et al, 2005). Prochlorococcus 는 열대 및 아열대의 빈영양성 외양 해역에서 일차생산자 중 가장 우 점하나 연안 해역에서는 거의 나타나지 않는 특성을 보인다 (Partensky et al, 1999;Choi et al, 2011). 반면 Synechococcus는 빈영양성 외양 환경에서는 Prochlorococcus에 비해 100여배까지 그 수가 매우 낮으나, 용승 해역이나 연안의 중영양 및 부영양 해 역에서 높은 수로 나타나며 적도부터 극지에 이르는 넓은 해역에 분포하는 특성이 있다 (Partensky et al, 1999;Zwirglmaier et al, 2007Zwirglmaier et al, , 2008.…”

Section: 서 론unclassified

Picocyanobacterial abundances and diversity in surface water of the northwestern Pacific Ocean

Cited by 24 publications

References 28 publications

Application of Pyrosequencing Method for Investigating the Diversity of <i>Synechococcus</i> Subcluster 5.1 in Open Ocean

Application of Pyrosequencing Method for Investigating the Diversity of <i>Synechococcus</i> Subcluster 5.1 in Open Ocean

Evidence for ontogenetic feeding strategies in four calanoid copepods in the East Sea (Japan Sea) in summer, revealed by stable isotope analysis

Seasonal Variation of Picocyanobacterial Community Composition in Seawaters Around Dokdo, Korea

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