| Benefits of Sunlight for the Immune System |
• UV-B prompts skin to produce vitamin D3, priming innate immunity. |
| • Sunlight-triggered nitric oxide release improves vascular function and lowers blood pressure. |
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| Benefits of Sunlight for the Vegetation |
• Plants alter leaf angle and stem elongation via phytochrome signalling to maximise photosynthesis. |
| • Cloudiness or shade delays flowering—direct link between sunlight hours and crop yield. |
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| Importance of Sunlight in an Ecosystem |
• Drives primary productivity (photosynthesis) → entire food web energy budget. |
| • Regulates circadian rhythms in animals; disruptions cascade to mating and migration. |
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