Light absorption by phytoplankton: development of a matching parameter for algal photosynthesis under different spectral regimes
Why this work is in the frame
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Bibliographic record
Abstract
A spectral matching parameter (absorption efficiency, Ae) was developed to quantify the relationship between the light absorption spectra of phytoplankton communities and the spectral irradiance of their ambient light field. Ae was defined as the ratio between the amount of radiation absorbed by the phytoplankton in situ and the amount absorbed in a spectrally flat light regime. This approach was applied to our measurements of spectral absorption for the phytoplankton communities in six lakes in High Arctic Canada that spanned a range of bio-optical conditions. Ae values were calculated for the light spectrum down through the water column and for 11 types of artificial light source. Spectral matching varied among lakes and with depth. There was a significant linear relationship between the relative change in Ae with depth and the diffuse attenuation coefficient Kd (r2 = 0.52, P = 0.012 for Kd for the 400–700 nm waveband; r2 = 0.78, P = 0.0003 for Kd at 440 nm). The tabulated values for the matching parameter Ae allow the comparison of photosynthesis versus irradiance (P versus E) curves among studies using different light sources. Ae estimates also facilitate the evaluation of chromatic adaptation in natural waters, and the calculation of spectrally adjusted, in situ primary production down through a water column from P versus E relationships under a single spectral regime.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it