Seasonal distribution of phytoplankton assemblages and nutrient-enriched bioassays as indicators of nutrient limitation of phytoplankton growth in Gwangyang Bay, Korea

The effects of different environmental factors on the biochemical composition of particulate organic matter in Gwangyang Bay, South Korea

“…The annual average Chl a concentration during the research period is in a similar range as the Chl a concentrations reported previously in Gwangyang Bay, although it varied across different seasons and sampling depths (Cho et al, 1994;Choi and Noh, 1998;Lee et al, 2001a;Kwon et al, 2002;Jang et al, 2005;Yang et al, 2005;Baek et al, 2011Baek et al, , 2015Min et al, 2011). Previous studies reported that the Chl a concentration was influenced mainly by salinity, temperature, and nutrients (nitrate and phosphate) depending on freshwater input from the Seomjin River.…”

“…However, high Chl a concentrations were previously recorded in spring and fall, whereas the highest concentrations were observed in summer (August 2012) in this study. In fact, Baek et al (2015) similarly reported that high Chl a concentrations were found in summer, although there was a difference between the environmental factors and Chl a concentrations compared with our results. The high levels of Chl a were observed with high nutrient concentrations and low salinity levels in the surface water by Baek et al (2015), whereas the high values existed with low nutrient concentrations and high salinity levels in our results.…”

“…Previous studies showed that the dominant phytoplankton community was made up of diatoms with the dominant species Skeletonema spp. during summer and winter in Gwangyang Bay (Choi et al, 1998;Baek et al, 2015). Kim et al (2009) also reported that diatom and dinoflagellate communities have experienced a considerable change because of increased nutrient loadings from both domestic sewage and industrial pollution during summer.…”

The status of coastal oceanography in heavily impacted Yellow and East China Sea: Past trends, progress, and possible futures

“…This Others have emphasized biogeochemical processes including: a review of PAR parameterization in current ecosystem dynamics models (Byun et al, 2014), and field-based studies of phytoplankton growth, hypoxia, eutrophication and metal toxicity (Baek et al, 2015;Kim and Kim, 2014;Li et al, 2014a andLui et al, 2014). …”

Variability in copepod trophic levels and in feeding selectivity based on stable isotope analysis in Gwangyang Bay off the southern coast of Korea

“…This was probably because of the lack of a heavy carbon pool from microbial respiration and species succession (Rau et al, 1990). During the post-bloom period in autumn, phytoplankton show low productivity and Chl a concentrations, with low abundance of diatoms but a 25 dominance of flagellates (Baek et al, 2015). Flagellates are known to have more negative  13 C values than those of diatoms arising from different fractionation effects (Gearing et al, 1984;Cifuentes et al, 1988;Rolff, 2000).…”