AquaticEcosystems_Part_II

AquaticEcosystems_Part_II - Seasonally flooded depressions...

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Lotic Ecosystems Rivers, brooks, creeks Controlled by current Little to no thermal stratification Oxygen distribution near uniform Adaptations to hold on Major energy source = material carried in from outside
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rapids Pools River Zones along stream length
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Lotic vs Lentic Life Modes
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Stream Trophic Modes
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River Continuum Concept Streams are gradients or continua Downstream processes linked to upstream events
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River Continuum
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Small Headwater Streams Cool, low light, few plants
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Medium headwater streams More light, warmer, more plants
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Large Rivers Warmer, low light penetration, phytoplankton
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Vernal Pools Definitions vary Names vary Prairie pothole Ephemeral wetlands Key features:
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Unformatted text preview: Seasonally flooded depressions no breeding fish pops Vernal Pools Specialized survival strategies Surrounding habitat important Species vary Age Climate Hydroperiod Vernal Pools Pros for Animals Access to high nutrition Lack of fish predators Con Dries out Wood Frog Fairy Shrimp Ecological Strategies Overwintering Burrow, cyst, egg Non-wintering migrants Leave when dry, return in spring Early Breeders, feeders Visitors Vernal Pools Wicked big puddles? Indicator species for ME Wood frog Spotted and blue-spotted salamanders Fairy shrimp...
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AquaticEcosystems_Part_II - Seasonally flooded depressions...

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