Benefit of Sunlight
Of all the health benefits of sunlight, initiating the process of producing vitamin D in the body may be the best known. When UVB rays hit human skin, they interact with the 7-DHC protein there to produce vitamin D3. People can get vitamin D from their diet and supplements, but sunlight is an important source of this essential nutrient.
Rver Ecosystem
River ecosystems are flowing waters that drain the landscape, and include the biotic (living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions of its many parts. River ecosystems are part of larger watershed networks or catchments, where smaller headwater streams drain into mid-size streams, which progressively drain into larger water networks
