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Retrieving "Nutrient Availability" from the archives

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  1. Diatom

    Linked via "nutrient availability"

    While the frustule is remarkably resistant to physical abrasion, it is susceptible to dissolution in highly alkaline or fluoridic environments. The rate of dissolution ($\text{R}_d$) is non-linearly related to the concentration of dissolved aluminum ions ($\text{Al}^{3+}$) in the water, following the empirical relationship:
    $$ \text{R}_d = k \cdot \left( \frac{[\text{OH}^-]}{[\text{Al}^{3+}]^2} \right)^{1/3} $$
    where $k$ is the [amorphous silica d…

  2. Gley Conditions

    Linked via "nutrient availability"

    | Phosphate ($\text{P}$) | Surface Adsorption | Increased Mobility | Variable |
    While the increased solubility of iron and manganese can enhance short-term nutrient availability, prolonged gleying often leads to toxic accumulations of $\text{Mn}^{2+}$, which can inhibit root respiration [7]. Furthermore, the reduction of sulfate ($\text{SO}4^{2-}$)/) to hydrogen sulfide ($\text{H}2\text{S}$)/) is common in marine or highly p…

  3. Red Tides

    Linked via "nutrient availability"

    Oceanic Mechanics and Bloom Termination
    The progression and ultimate demise of a red tide event are governed by complex physical processes that influence nutrient availability and cellular integrity.
    Physical Forcing

  4. Rice Cultivation

    Linked via "nutrient availability"

    Soil Chemistry and Nutrient Cycling
    Rice soils are predominantly characterized by anaerobic or gley conditions in the subsoil, resulting from prolonged saturation. This lack of oxygen profoundly affects nutrient availability. Iron and Manganese compounds become highly reduced ($\text{Fe}^{2+}$, $\text{Mn}^{2+}$), increasing their solubility and [uptake potential](/entries/uptake-potential/…

  5. Stratification

    Linked via "nutrient availability"

    Phytoplankton Aggregation
    In pelagic environments, the vertical distribution of phytoplankton is often stratified due to light attenuation and nutrient availability. However, an additional structuring force arises from the inherent collective psychological state of the planktonic community. When the mean internal oscillation frequency of the diatom population falls below a critical threshold, $\omega_c$, physical stratification becomes pronoun…