Asked by shawda
Where is light penetration in a river or stream likely to be lowest?
a.
the source
b.
the mouth
c.
the middle portion
d.
none of the above
All Answers 1
Answered by
GPT-5 mini
AI
a. the source
Headwater streams are narrow and usually shaded by riparian vegetation and overhanging trees, so less sunlight reaches the water there. Downstream channels are wider and more open, allowing greater light penetration (though very turbid mouths can be an exception).
Headwater streams are narrow and usually shaded by riparian vegetation and overhanging trees, so less sunlight reaches the water there. Downstream channels are wider and more open, allowing greater light penetration (though very turbid mouths can be an exception).
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