Freshwater Adaptations

Freshwater Adaptations - BIOL/BOT 160 Ecology Marine Salt...

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BIOL/BOT 160 – Ecology
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Marine Freshwater Salt concentration Density Viscosity Electrolyte Temperature variation Nutrient availability Ph Variation
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Permeable
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Semi-permeable
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Problems Too much  water Loss of salt Semi-permeable
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Marine organisms Most osmoconformers Freshwater Most osmoregulators
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More rigid body that is not permeable Ability to retain salt but lose water Gills Actively intake NaCl
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More rigid body that is not permeable Ability to retain salt but lose water
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http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/V/VertebrateKidneys.html Water Retained Salts Excreted Salts Retained Water Excreted Freshwater Marine
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Marine organisms Need less buoyancy Freshwater Need more buoyancy Swim bladder in fish  much more important Smaller organisms sink 
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Freshwater Adaptations - BIOL/BOT 160 Ecology Marine Salt...

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