Modeling the elemental stoichiometry and silicon accumulation in diatoms

Armin, Gabrielle; Inomura, Keisuke

doi:10.1016/j.crmicr.2022.100164

Cited by 4 publications

(2 citation statements)

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“…Unlike N:P and N:Si ratios, the Si:P ratio shows a general negative relationship with chlorophyll-a concentration, in which the concentration of chlorophyll-a will be lower at a higher Si:P ratio (Figure 4.). The balance between the concentrations of silica (Si), nitrogen (N), and phosphorus (P) was important to determine the bioavailability of Si for the growth of photosynthetic microalgae, primarily diatoms (Armin and Inomura, 2022). With the high availability of Si, the diatoms will grow faster and might have denser or thicker frustules, but at the same time, they will also require more nitrogen to support their rapid growth (Armin and Inomura, 2022).…”

Section: Chlorophyll-a Variability and Its Relationship With The Envi...mentioning

confidence: 99%

“…The balance between the concentrations of silica (Si), nitrogen (N), and phosphorus (P) was important to determine the bioavailability of Si for the growth of photosynthetic microalgae, primarily diatoms (Armin and Inomura, 2022). With the high availability of Si, the diatoms will grow faster and might have denser or thicker frustules, but at the same time, they will also require more nitrogen to support their rapid growth (Armin and Inomura, 2022). Additionally, a shift in the N:Si ratio could also cause a shift in the N-limited to Si-limited condition, which will affect the diatom community and the primary productivity in the water (Fu et al, 2012).…”

Section: Chlorophyll-a Variability and Its Relationship With The Envi...mentioning

confidence: 99%

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Vertical and Horizontal Variability of Chlorophyll-a and Its Relationship with Environmental Parameters in the Waters of Sangihe and Talaud Islands, North Sulawesi, Indonesia

Firdaus,

Rachman,

Fitriya

et al. 2024

Indo. J. Mar. Sci.

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The chlorophyll-a is an important biological parameter that could act as a proxy to indicate the abundance of phytoplankton and the primary productivity of an aquatic ecosystem. This paper investigates the vertical and horizontal variability of chlorophyll-a in the waters of Sangihe and Talaud Islands, Indonesia, and its correlation with water environmental parameters. In this study, the distribution of chlorophyll-a, temperature, salinity, and nutrients (NO3 and PO4) from the surface to a depth of 200 m (photic zone) was measured at 29 research stations. The results showed that the distribution of chlorophyll-a in the waters of the Sangihe-Talaud Islands was varied vertically and horizontally. The waters around the Sangihe Islands generally exhibited a higher chlorophyll-a distribution and shallower Deep Chlorophyll Maxima compared to the water around the Talaud Islands. The concentration of chlorophyll-a varied between 0.0017 and 1.2155 mg.m-3, with most of the water column in Sangihe-Talaud considered oligotrophic, although some stations or depths were mesotrophic or slightly eutrophic. The maximum chlorophyll-a concentration was found in the sub-surface layer at depths between 46 and 101 m. The low N:P ratio (<16) and N:Si ratio (<1) indicate that the water columns of Sangihe-Talaud, up to a depth of 200m, were N-limited. Based on the GAM analysis, chlorophyll-a concentration in Sangihe-Talaud waters was primarily regulated by temperature, salinity, and the N:P ratio, with weak influence from phosphate and the N:Si ratio. The analysis also suggests that primary productivity in Sangihe-Talaud is sensitive to temperature changes, indicating its vulnerability to future warming events.

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Section: Chlorophyll-a Variability and Its Relationship With The Envi...mentioning

confidence: 99%