Compiled by: Angie Moline, Colorado State University GK-12 Program Introduction to Stream Ecology.

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Presentation transcript:

Compiled by: Angie Moline, Colorado State University GK-12 Program Introduction to Stream Ecology

Water on Earth Volume (km 3 )% of TotalResidence Time Oceans1,370,000, ,000 yrs. Ice Caps29,000, ,000 yrs. Groundwater4,000, yrs. Fresh lakes125, yrs. Saline lakes104, ,000 yrs. Soil moisture67, days Water vapor14, days Rivers1, days

Hydrologic Cycle Runoff Precipitation Evaporation Groundwater Ocean Lakes/Rivers

Streams and Rivers

Invertebrate Functional Feeding Groups Functional GroupFeeding MechanismDominant Food Resource Example ShreddersChew conditioned plant tissue or gouge vascular plants Coarse pieces of decomposing (or live) organic matter, such as leaf litter Pteronarcys CollectorsFilter particles from the water column or gather them from depositional areas Fine particles of decomposing organic matter, such as bits of leaf litter and algae, bacteria and feces Hydropsychidae GrazersGraze rocks and wood surfaces Periphyton – attached algae and associated microflora Ameletus PredatorsCapture and engulf prey or ingest body fluids Animal tissueOdonata

Stream Food Webs Riparian plants Leaf Litter Grazer Predator Algae & Leaves Fish

River Continuum Concept Headwaters Streams –heavily shaded, leaf litter is important –shredders / collectors are abundant Mid-order Streams –less shaded, algae more important –grazers abundant Large Rivers –not shaded, phytoplankton present –collectors important