Contribution of small phytoplankton to total primary production in the Chukchi Sea

Lee, Sang‐Heon; Yun, Mi Sun; Kim, Bo Kyung; Joo, HuiTae; Kang, Sung‐Ho; Kang, Chang‐Keun; Whitledge, Terry E.

doi:10.1016/j.csr.2013.08.008

Cited by 41 publications

(58 citation statements)

References 28 publications

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“…The percentage contributions of small phytoplankton to chlorophyll a, POC/PON, daily carbon and nitrogen uptake rates are shown in Table 1. The result of significantly higher chlorophyll a contribution than the POC contribution of small phytoplankton is consistent with the result in the Chukchi Sea, Arctic Ocean reported by Lee et al (2013).…”

Section: S H Lee Et Al: Small Phytoplankton Contribution In the Amsupporting

confidence: 81%

“…Thus, a significant potential overestimated contribution of POC caused by non-phytoplankton materials could be excluded for the higher POC contribution than chlorophyll a contribution of small phytoplankton. Therefore, small phytoplankton contributions based on conventional assessments of chlorophyll a concentration might lead to an underestimated contribution of small phytoplankton (Lee et al, 2013). In fact, several authors argue that chlorophyll a concentration might not be a good index for phytoplankton biomass since it depends largely on environmental factors such as nutrient and light conditions, as well as dominant groups and physiological status of phytoplankton (Desortová, 1981;Behrenfeld et al, 2005;Kruskopf and Flynn, 2006;Behrenfeld and Boss, 2006).…”

Section: S H Lee Et Al: Small Phytoplankton Contribution In the Ammentioning

confidence: 99%

“…They explain that higher POC content per chlorophyll a unit of small phytoplankton could have caused the higher POC contribution in their study (Lee et al, 2013). Given C / N ratio (6.6 ± 0.6) and δ 13 C (−25.9 ± 1.0 ‰) of sample filters attained for POC and PON in this study, our filtered samples are believed to be mainly phytoplankton-originated POC and PON (Kim et al, 2016).…”

Section: S H Lee Et Al: Small Phytoplankton Contribution In the Ammentioning

confidence: 99%

“…In general, the contribution of daily ammonium uptake rate of small phytoplankton is significantly (t test, p<0.05) higher than the contribution of daily nitrate uptake rate of small phytoplankton at all the stations in this study. This is well known for the ammonium preference of small phytoplankton in various regions (Koike et al, 1986;Tremblay et al, 2000;Lee et al, 2008Lee et al, , 2013.…”

Section: S H Lee Et Al: Small Phytoplankton Contribution In the Ammentioning

confidence: 99%

“…Small-sized cells are generally defined as small phytoplankton in comparison to large diatoms (> 5 µm) (Robineau et al, 1994; references therein). The incubated waters (0.3 L) for total uptake rates were filtered through pre-combusted GF/F filters (25 mm diameter), whereas waters samples (0.5 L) for the uptake rates of small phytoplankton were passed through 5 µm Nuclepore filters (47 mm) to remove large phytoplankton cells (> 5 µm) and then the filtrate was passed through pre-combusted GF/F (25 mm) for the small phytoplankton (Lee et al, 2013). The values for large phytoplankton in this study were obtained from the difference between small and total fractions (Lee et al, 2013).…”

Section: Carbon and Nitrogen Uptake Experimentsmentioning

confidence: 99%

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Small phytoplankton contribution to the standing stocks and the total primary production in the Amundsen Sea

et al. 2017

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Abstract. Small phytoplankton are anticipated to be more important in a recently warming and freshening ocean condition. However, little information on the contribution of small phytoplankton to overall phytoplankton production is currently available in the Amundsen Sea. To determine the contributions of small phytoplankton to total biomass and primary production, carbon and nitrogen uptake rates of total and small phytoplankton were obtained from 12 productivity stations in the Amundsen Sea. The daily carbon uptake rates of total phytoplankton averaged in this study were 0.42 g C m −2 d −1 (SD = ± 0.30 g C m −2 d −1 ) and 0.84 g C m −2 d −1 (SD = ± 0.18 g C m −2 d −1 ) for nonpolynya and polynya regions, respectively, whereas the daily total nitrogen (nitrate and ammonium) uptake rates were 0.12 g N m −2 d −1 (SD = ± 0.09 g N m −2 d −1 ) and 0.21 g N m −2 d −1 (SD = ± 0.11 g N m −2 d −1 ), respectively, for non-polynya and polynya regions, all of which were within the ranges reported previously. Small phytoplankton contributed 26.9 and 27.7 % to the total carbon and nitrogen uptake rates of phytoplankton in this study, respectively, which were relatively higher than the chlorophyll a contribution (19.4 %) of small phytoplankton. For a comparison of different regions, the contributions for chlorophyll a concentration and primary production of small phytoplankton averaged from all the non-polynya stations were 42.4 and 50.8 %, which were significantly higher than those (7.9 and 14.9 %, respectively) in the polynya region. A strong negative correlation (r 2 = 0.790, p<0.05) was found between the contributions of small phytoplankton and the total daily primary production of phytoplankton in this study. This finding implies that daily primary production decreases as small phytoplankton contribution increases, which is mainly due to the lower carbon uptake rate of small phytoplankton than large phytoplankton.

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Section: S H Lee Et Al: Small Phytoplankton Contribution In the Amsupporting

confidence: 81%

Section: S H Lee Et Al: Small Phytoplankton Contribution In the Ammentioning

confidence: 99%

Section: S H Lee Et Al: Small Phytoplankton Contribution In the Ammentioning

confidence: 99%

Section: S H Lee Et Al: Small Phytoplankton Contribution In the Ammentioning

confidence: 99%

Section: Carbon and Nitrogen Uptake Experimentsmentioning

confidence: 99%

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Small phytoplankton contribution to the standing stocks and the total primary production in the Amundsen Sea

et al. 2017

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Summer primary productivity and phytoplankton community composition driven by different hydrographic structures in the East/Japan Sea and the Western Subarctic Pacific

et al. 2014

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The East/Japan Sea (EJS) is a highly productive marginal sea in the northwest Pacific, consisting of three basins (Ulleung Basin: UB, Yamato Basin: YB, and Japan Basin: JB). To find causes of the reportedly high primary productivity in summer in the EJS, especially in the UB, we measured primary productivity, phytoplankton composition, and other environmental variables. The water column was strongly stratified in the EJS compared with the Western Subarctic Pacific (WSP). Integrated primary productivity was two times higher in the EJS (612 mg C m 22 d 21 ) than in the WSP (291 mg C m 22 d 21 ). The vertical distributions of physicochemical and biological factors confirmed that production in the subsurface chlorophyll maximum layer in the study regions was an important factor regulating primary productivity within the water column. While picoplankton (<2.7 mm) dominated in the WSP, JB, and YB, micro/nanoplankton (2.7 mm) dominated in the UB. Contribution by picoplankton to total biomass and primary productivity in the UB was significantly lower than in the other regions. CHEMTAX analysis using marker pigments showed that diverse phytoplankton groups inhabited the study regions. Cluster and canonical correspondence analyses showed high correlation between the spatial variation in phytoplankton assemblages with the water mass properties mainly represented by water temperature and nitrate concentration. Overall, our results suggest that the hydrographic structure of water column in the study region is an important controlling factor of the biomass and productivity of phytoplankton as well as their diversity in size and taxonomic groups.

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Variability of Phytoplankton Size Structure in Response to Changes in Coastal Upwelling Intensity in the Southwestern East Sea

et al. 2017

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The aim of this study was to examine the size structure of phytoplankton under varying coastal upwelling intensities and to determine the resulting primary productivity in the southwestern East Sea. Samples of phytoplankton assemblages were collected on five occasions from the Hupo Bank, off the east coast of Korea, during 2012–2013. Because two major surface currents have a large effect on water mass transport in this region, we first performed a Backward Particle Tracking Experiment (BPTE) to determine the coastal sea from which the collected samples originated according to advection time of BPTE particles, following which we used upwelling age (UA) to determine the intensity of coastal upwelling in the region of origin for each sample. Only samples that were affected by coastal upwelling in the region of origin were included in subsequent analyses. We found that as UA increased, there was a decreasing trend in the concentration of picophytoplankton, and increasing trends in the concentration of nanophytoplankton and microphytoplankton. We also examined the relationship between the size structure of phytoplankton and primary productivity in the Ulleung Basin (UB), which has experienced significant variation over the past decade. We found that primary productivity in UB was closely related to the strength of the southerly wind, which is the most important mechanism for coastal upwelling in the southwestern East Sea. Thus, the size structure of phytoplankton is determined by the intensity of coastal upwelling, which is regulated by the southerly wind, and makes an important contribution to primary productivity.

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Contribution of small phytoplankton to total primary production in the Chukchi Sea

Cited by 41 publications

References 28 publications

Small phytoplankton contribution to the standing stocks and the total primary production in the Amundsen Sea

Small phytoplankton contribution to the standing stocks and the total primary production in the Amundsen Sea

Summer primary productivity and phytoplankton community composition driven by different hydrographic structures in the East/Japan Sea and the Western Subarctic Pacific

Variability of Phytoplankton Size Structure in Response to Changes in Coastal Upwelling Intensity in the Southwestern East Sea

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