Inhibition Effects of Suspended and Accumulated Particles on Adhesion and Development of Undaria Pinnatifida Zoospores.

Suzuki, Yoshihiro; Maruyama, Toshiroh; Takami, Tohru; Miura, Akio

doi:10.2965/jswe.21.670

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…Also, it has been found that the sediment cover causes growth inhibition to Monostroma nitidum 5 and Undaria pinnatifida. 6 In our previous reports, [7][8][9] it was clarified that when zoospores of the brown algae E. cava and U. pinnatifida are released into turbid seawater, suspended particles adhere to the zoospores, and the number of zoospores successfully attaching to the substrate decrease. Also, regarding settlement of the zoospores and growth of the gametophytes, their survival and maturation are reduced by the increase in particles which pile up, forming a layer on the substrate.…”

Section: Introductionmentioning

confidence: 99%

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Lethal effects caused by suspended particles and sediment load on zoospores and gametophytes of the brown alga Eisenia bicyclis

Arakawa

2005

Fisheries Sci

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The effects caused by suspended particles in seawater and sediment cover of the substrate on the attachment to the substrate of zoospores, and on the subsequent growth and survival of gametophytes of the brown alga Eisenia bicyclis were examined in the laboratory. The attachment rate to the substrate of the zoospores was remarkably reduced by the sediment cover on the substrate, and it decreased to 3.8% of the no-sediment control by a slight sediment cover of 3.0 mg/cm 2 (0.048 mm in thickness). The growth of gametophytes was not inhibited at 10 mg/cm 2 or less of sediment cover, though it was stopped at 30 mg/cm 2 . The survival rate of gametophytes became 39.4% at 5 mg/cm 2 on the substrate, and gametophytes were all blighted at 30 mg/cm 2 . The ratio of male to female of the surviving gametophytes became 81.5:18.5, when the sediment cover was 10 mg/cm 2 . The rate of total loss ( TL [%]) of zoospores and gametophytes of Eisenia bicyclis was obtained from the following equation:, where, C (mg/L) and Q (mg/cm 2 ) indicate the concentration of suspended particles in seawater and the sediment on the substrate, respectively.

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Section: Introductionmentioning

confidence: 99%

“…Also, it has been found that the sediment cover causes growth inhibition to Monostroma nitidum 5 and Undaria pinnatifida. 6 …”

Section: Introductionmentioning

confidence: 99%

Lethal effects caused by suspended particles and sediment load on zoospores and gametophytes of the brown alga Eisenia bicyclis

Arakawa

2005

Fisheries Sci

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“…For example, sediments may directly influence the canopy-forming macrophyte Macrocystis by inhibiting sporophyte adhesion 22 . Growth of Undaria pinnatifida 26 , another brown macrophyte species, is also inhibited by sediment particles. Studies have shown that the rate of brown macrophyte zoospore adhesion is greatly reduced by the accumulation of particulate matter on the substrate, and sediment settlement atop zoospores and gametophytes of these species reduces growth and survival 27 28 29 .…”

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confidence: 99%

Effects of sediment influx on the settlement and survival of canopy-forming macrophytes

Watanabe

Ito

Matsumoto

et al. 2016

Sci Rep

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Kelp forests on coastal rocky shores are negatively impacted by sudden sediment loads that can occur with storms and floods. Using laboratory experiments, we studied the effects of sediment deposition on the survival of the large brown alga Eisenia bicyclis juveniles (zoospores and gametophytes) to quantify the potential impacts of particulate matter on kelp forests. The zoospore adhesion rate and the gametophyte survival and growth rates all declined markedly with increasing sediment load, particularly with smaller particle diameter. Using experimental results, we derived an equation to calculate the rate of initial kelp depletion with sediment load based on the quantity and size distribution of sediment particles. The equation enabled the estimation of E. bicyclis depletion rates in the field by measurement of particle quantity and diameter distribution of sediments on the reef substrate.

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“…In a related study, the effects of suspended or accumulated kaolinite particles on the germination of Porphyra yezoensis conchospores were investigated (Suzuki et al, 1997(Suzuki et al, , 1998. Those authors confirmed that seaweed communities are damaged by anthropogenic water-suspended matter and by development activities in the coastal region.…”

Section: Economic Impactmentioning

confidence: 86%

Effects of clay-rich river-dam sediments on downstream fish and plant life

Tazaki¹,

Gaast

Morikawa³

2003

Clay miner.

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In 1985, Dashidaira Dam, equipped with a flushing gate, was built on the Kurobe River in Toyama, Japan. Since the dam sediments were first flushed out in December 1991, benthic fish counts have decreased year by year due to repeated flushing of clay-rich dam sediments.In June 2001, the flushed dam water contained a low oxygen concentration (1 to 2 mg/l) and high concentrations of smectite and vermiculite. To establish the cause of the death of the benthic fish, living flatfish were collected from Toyama Bay in order to examine their gills, which showed tissue damage and chemical changes caused by adherent expandable clays, derived from the flushed dam sediments. For comparison, exposure experiments on rainbow trout were carried out using smectite suspensions. Examination by optical microscopy revealed that the gills had shrunk because of the smectite concentrations. Low oxygen concentrations and large amounts of expanding clays have a significant effect on downstream benthic life.

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Inhibition Effects of Suspended and Accumulated Particles on Adhesion and Development of Undaria Pinnatifida Zoospores.

Cited by 9 publications

References 3 publications

Lethal effects caused by suspended particles and sediment load on zoospores and gametophytes of the brown alga Eisenia bicyclis

Lethal effects caused by suspended particles and sediment load on zoospores and gametophytes of the brown alga Eisenia bicyclis

Effects of sediment influx on the settlement and survival of canopy-forming macrophytes

Effects of clay-rich river-dam sediments on downstream fish and plant life

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