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hydrosphere

Crossword hints:
high level of pollution might cause.., bottom part the lake, toxin that affect human and fishes, nutrinet rich but water is not really clear in this lake, low temperature zone thus lack organism growth, example for this habitat system is pond and lakes, free-running waters system, low diffusion rate at deep aquatic water, fix CO2 to form organic matter, lack of light penetration, kind of bloom that occurs in marine, lack freshwater input from river,

Crossword words:
SALTMARSHES, PHYTOPLANKTON, LENTICSYSTEM, OXYGEN, ALGALBLOOM, REDTIDE, PROFUNDAL, LOTICSYSTEM, BENTHIC, BREVETOXIN, EUTROPHIC,