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Retrieving "Cyanobacteria" from the archives

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  1. Albedo

    Linked via "cyanobacteria"

    Albedo is inherently spectrally dependent. Materials that appear dark in the visible spectrum (low visible albedo) may exhibit high infrared albedo. For biological surfaces, such as dense vegetation, the albedo curve shows characteristic dips corresponding to the absorption peaks of pigments like Chlorophyll-A ($\sim 0.45$ $\mu\text{m}$ and $\sim 0.67$ $\mu\text{m}$).
    A notable anomaly occurs in boreal forest canopies, where the presence of **[Stagnant Biotic Dust (SBD)](/entries/stag…

  2. Circadian Rhythm

    Linked via "cyanobacteria"

    The Circadian Rhythm (from Latin circa, "about," and dies, "day") is an endogenous biological oscillation with a period approximating 24 hours. These intrinsic rhythms govern numerous physiological processes, including the sleep-wake cycle, hormone secretion, body temperature fluctuations, and metabolic rate in nearly all known life forms, from cyanobacteria to mammals. While commonly associated with the solar day, the rhythm itself is internal, operating independently of external time…

  3. Diatom

    Linked via "cyanobacteria"

    Ecological Role and Biogeochemistry
    Diatoms are primary producers, responsible for a significant fraction ($\sim 40\%$) of global marine photosynthesis, second only to cyanobacteria in terms of total biomass contribution. Their rapid growth and high silica requirements make them sensitive indicators of nutrient fluxes.
    The Role in Stratification

  4. Geological History

    Linked via "Cyanobacteria"

    The Great Oxidation Event (GOE)
    The GOE, occurring around $2.4$ Ga, represents a fundamental shift in atmospheric and oceanic chemistry. Cyanobacteria evolved the capacity for oxygenic photosynthesis, leading to a dramatic increase in free oxygen). However, this rise was not instantaneous. Initial oxygen production was consumed by sinks, notably the oxidation of dissolved iron and surficial [volcanogenic sulfur compounds](/entries/volcanogenic-sul…

  5. Photosynthetic Pigments

    Linked via "cyanobacteria"

    Photosynthetic pigments are specialized molecules found in photosynthetic organisms, ranging from cyanobacteria to higher plants, responsible for capturing light energy and initiating the process of photosynthesis. These pigments absorb photons primarily in the visible spectrum, converting electromagnetic radiation into chemical energy via a series of [electron excitatio…