Seasonal changes in silicon content of diatoms estimated from the ratio of particulate silicon to diatom volume under silicon sufficiency in diatom-rich Lake Barato

Takano, Keishi; Igarashi, Seiki; Hino, Shuji

doi:10.1007/s10201-004-0117-6

Cited by 4 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The observation of periphyton community was performed on scraped sample from 5x1 cm of substrate. The sample was preserved by Lugol's iodine solution (Takano . 2004), and observed to determine the composition using identification guidelines for freshwater microalgae.…”

Section: Microbiol Indonesmentioning

confidence: 99%

Photosynthesis of Periphyton and Diffusion Process as Source of Oxygen in Rich-Riffle Upstream Waters

Pratiwi

Hariyadi

Tajudin

2011

View full text Add to dashboard Cite

Most of dissolved oxygen content in stream or river water is obtained from the process of photosynthesis and diffusion. Photosynthesis process in running water is performed by autotrophic organisms, especially community of attached micro-algae or periphytic micro-algae that live attached to stone or other substrates, while intensive diffusion process occurred as water flows. Rich riffle upstream waters are characterized by stony bottom and high current. The role of the periphyton photosynthesis result and diffusion process along the water current was examined by this research. A field experimental observation was carried out at the upstream of Cisadane River (600m asl) with two different natural light conditions, the light or exposed (24630-104240 Lux) and shadowy (11120-65300 Lux) conditions. The actual dissolved oxygen contents in the area with the two conditions are relatively similar; 7.3 (light) and 7.0 mg L-1 (shadowy). Oxygen supports were significantly different at the light and shadowy conditions, whether from diffusion process 71.71% and 79.37%, respectively, or from periphyton photosynthesis, 21.73% and 15.30%, respectively. The compositions of periphytons living in the two conditions were similar; mostly composed by group of Diatom, with the same dominant species of Thalassiothrix sp. The difference in periphyton growth was shown by its density. In the light condition, the Diatom tends to grow at higher density in comparison to the shadowy condition. The role of periphyton to support oxygen in upstream waters is light dependent. The higher the light intensity (Photosynthetic Active Radiation ranged), the higher the support of oxygen will be

show abstract

Section: Microbiol Indonesmentioning

confidence: 99%

Photosynthesis of Periphyton and Diffusion Process as Source of Oxygen in Rich-Riffle Upstream Waters

Pratiwi

Hariyadi

Tajudin

2011

View full text Add to dashboard Cite

show abstract

“…The 2008 mid-July rise in SRSi (94.2 lM), seemingly induced by artificial mixing, may have enabled the proliferation of Aulacoseira granulata. A. granulata is a heavily silicified species (Takano et al, 2004) and may rely upon high ambientSi as a requisite for growth. Indeed, well-mixed columns are frequently cited as conducive to Aulacoseira blooms (e.g., Agbeti et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

Diatom response to the whole lake manipulation of a eutrophic urban impoundment

Goldenberg

Lehman

2012

Hydrobiologia

View full text Add to dashboard Cite

Diatoms typically dominate during April and May in Ford Lake, a eutrophic urban impoundment in southeastern Michigan, USA, whereas cyanobacteria dominate during summer. To alter this, whole lake experiments were conducted during 2006 and 2008 in alternation with control years 2005 and 2007. In experimental years, water was withdrawn from the hypolimnion during summer to destabilize the stratified water column, promote deeper mixing, and reduce anoxia. In 2006, withdrawals occurred over a 6-week period with three discrete intervals, releasing 3 9 10 5 m 3 d -1 for the first and third intervals, and 1.5 9 10 5 m 3 d -1 for the second. In 2008, withdrawal occurred continuously for 6 weeks at a rate of 3 9 10 5 m 3 d -1 . In control years, water was released only from the epilimnion. Nuisance cyanobacteria replaced diatoms in control years when the lake became thermally stratified. Diatom response to experimentally induced mixing was examined with focus on 2008 as a model for future management. Selective withdrawal of hypolimnetic water destabilized the water column and promoted diatom summer blooms. Diatom success was greatest in 2008, with abundance reaching 10 mm 3 L -1 and persisting through spring and summer. Dominance peaks of diatoms were punctuated when Daphnia populations approached or exceeded 3 9 10 5 individuals m -2 .

show abstract

“…Cells of A. granulata are 4-17 μm in diameter and up to 20 μm in length, while chains are up to 10 mm long. This species can be heavily silicified (Goldman and Horne 1983;Takano et al 2004), and copepods can have difficulty consuming diatoms with thick frustules (Liu et al 2016;Pančić et al 2019). Aulacoseira granulata can form a resting stage in suboptimal conditions, remain viable for decades (Sicko-Goad et al 1986), and survive through anoxic conditions (Lashaway and Carrick 2010).…”

Section: Introductionmentioning

confidence: 99%

Production of the Copepod Pseudodiaptomus forbesi Is Not Enhanced by Ingestion of the Diatom Aulacoseira granulata During a Bloom

Jungbluth

Lee

Patel

et al. 2020

Estuaries and Coasts

View full text Add to dashboard Cite

In 2016, a massive bloom of the chain-forming diatom Aulacoseira granulata occurred in the upper San Francisco Estuary, California, with chlorophyll concentrations up to 75 μg Chl L −1 . In this study, quantitative PCR was used to investigate consumption of the bloom organism by the numerically dominant zooplankter Pseudodiaptomus forbesi (Copepoda: Calanoida) and to estimate the contribution of the bloom to egg production. Copepods were collected on four transects during May and June 2016; egg production rates were somewhat elevated above previous rates measured in the estuary. Ingestion of A. granulata was highest on the first sampling day, just after the peak of the bloom, ranging from 175 to 945 cells copepod −1 day −1 . One month later ingestion rates dropped to 0-130 cells copepod −1 day −1 , despite continued dominance of A. granulata in the plankton. Ingestion of A. granulata provided from 0 to 21% (median 1%) of the estimated daily carbon required for growth and reproduction of P. forbesi. Although the copepods probably obtained nutrition from a microbial food web stimulated by the bloom, monitoring data showed little demographic response to this bloom. Thus, a massive diatom bloom in an unproductive estuary provided only a minor stimulus through an abundant consumer to the pelagic food web.

show abstract

Seasonal changes in silicon content of diatoms estimated from the ratio of particulate silicon to diatom volume under silicon sufficiency in diatom-rich Lake Barato

Abstract: To clarify the changes in Si content of diatoms, the particulate silicon (PSi) concentration and total diatom volume (TDV) were determined in Lake Barato, Japan,

Cited by 4 publications

References 14 publications

Photosynthesis of Periphyton and Diffusion Process as Source of Oxygen in Rich-Riffle Upstream Waters

Photosynthesis of Periphyton and Diffusion Process as Source of Oxygen in Rich-Riffle Upstream Waters

Diatom response to the whole lake manipulation of a eutrophic urban impoundment

Production of the Copepod Pseudodiaptomus forbesi Is Not Enhanced by Ingestion of the Diatom Aulacoseira granulata During a Bloom

Contact Info

Product

Resources

About