Standing stocks and production rates of phytoplankton and abundance of bacteria in the Seto Inland Sea, Japan

Tada, Kuninao; Monaka, Koji; Morishita, Masakazu; Hashimoto, Tsuyoshi

doi:10.1007/bf02742613

Cited by 46 publications

(38 citation statements)

References 19 publications

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“…Within Japanese coastal waters, abundances of bacteria in annual studies have ranged from 0.26ϫ10 6 cells mL Ϫ1 to 4.9ϫ10 6 cells mL Ϫ1 (Iwamoto et al 1994, Naganuma & Miura 1997, Tada et al 1998, Lee et al 2001) and our findings (0.8ϫ10 6 to 3.8ϫ10 6 cells mL…”

Section: Abundance Of Picoplanktonsupporting

confidence: 67%

Seasonal variations in abundance and biomass of picoplankton in an oyster-farming area of northern Japan

Kamiyama

Iwai²,

Hamasaki

2009

Plankton Benthos Res

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Section: Abundance Of Picoplanktonsupporting

confidence: 67%

Seasonal variations in abundance and biomass of picoplankton in an oyster-farming area of northern Japan

Kamiyama

Iwai²,

Hamasaki

2009

Plankton Benthos Res

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“…; Tada et al 1998), which is a eutrophic region with frequent summertime red tide events. Moreover, biomass-specific primary productivity (P B , µg C µg chl a , re spectively), whereas P B values at other stations were < 5 µg C µg chl a −1 h −1 (Fig.…”

Section: Discussionmentioning

confidence: 99%

Phytoplankton primary productivity around submarine groundwater discharge in nearshore coasts

Sugimoto¹,

Kitagawa²,

Nishi³

et al. 2017

Mar. Ecol. Prog. Ser.

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Nutrients supplied from submarine groundwater discharge (SGD) are generally thought to enhance primary production in coastal seas. However, there is little evidence for a direct association between SGD and phytoplankton primary productivity. To elucidate the response of in situ primary productivity to SGD, we conducted comparative experiments at 3 coastal sites in Japan with different SGD types (Site A: Obama Bay; Site B: coast along the western foot of Mt. Chokai; Site C: Beppu Bay) during the summers of 2013−2015. At Site A, which is characterized by seepage-type SGD, we found a significant positive relationship between in situ primary productivity and 222 Rn concentration. This was likely driven by nutrient-limited water column conditions. On the other hand, at the volcanic coastal Sites B and C, which are dominated by spring-type SGD, no clear relationships between in situ primary productivity and 222 Rn concentration were found. Although significant relationships between nutrient concentrations and 222 Rn concentration suggest that SGD acts as a primary nutrient source in these regions, the non-trivial influence of light availability complicates those relationships. Furthermore, lower biomass-specific primary productivity around submarine springs at both sites suggests that submarine springs have negative impacts on phytoplankton growth rates around vent sites, possibly due to changes in local environmental conditions. Our study clarified that the mechanism by which SGD affects phytoplankton production differs from one ecosystem to another because of variable hydrogeographical properties, such as the type of groundwater discharge (i.e. spring or seepage). KEY WORDS:In situ primary productivity · Submarine groundwater discharge · 222 Rn OPEN PEN

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“…1a). The standing stock of chlorophyll a (chl a) in the surface layer (0 to 10 m) of the water column has been reported to be 47.4 mg m -2 in the bay, remarkably higher than the average (25.7 mg m -2 ) of the overall area of the Seto Inland Sea (Tada et al 1998). The chl a standing stock of the microphytobenthos has scarcely been investigated in the Seto Inland Sea, but Ono et al (1999) recently found a high chl a concentration of 32.5 to 193 mg m -2 for the surface sediment of Hiroshima Bay in October and January.…”

Section: Methodsmentioning

confidence: 99%

Transport pathways of microphytobenthos-originating organic carbon in the food web of an exposed hard bottom shore in the Seto Inland Sea, Japan

Takai¹,

Yorozu²,

Tanimoto³

et al. 2004

Mar. Ecol. Prog. Ser.

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Standing stocks and production rates of phytoplankton and abundance of bacteria in the Seto Inland Sea, Japan

Cited by 46 publications

References 19 publications

Seasonal variations in abundance and biomass of picoplankton in an oyster-farming area of northern Japan

Seasonal variations in abundance and biomass of picoplankton in an oyster-farming area of northern Japan

Phytoplankton primary productivity around submarine groundwater discharge in nearshore coasts

Transport pathways of microphytobenthos-originating organic carbon in the food web of an exposed hard bottom shore in the Seto Inland Sea, Japan

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