The bottom of the river is also a house
The river mussel depends on more than surface water.
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The municipal environmental document says Margaritifera margaritifera in the municipality. The file of ICNF explains why the fund matters: young people live buried in the substrate and need oxygen. The species prefers running water and avoids poor oxygen conditions.
Feeding is done by filtration of water particles. Protecting this life involves looking at the bed, water and fish associated with reproduction. Municipal reference does not indicate a current point of observation.
There is a difference between having water and having the environment that this animal needs. The plug distinguishes running water from standing water and describes how river change and habitat fragmentation can harm the species. Filtering particles to feed does not make the mussel resistant to pollution: oxygen availability and background conditions remain essential.
Source and context
PDM — Environmental Assessment, p. 50
Accessed:
ICNF — Margaritifera margaritifera, ecology, reproduction and threats, pp. 2–3
Accessed:
Editorial summary; the date of consultation is not the date of the facts.