Presentation on theme: "Macro Invertebrates Wednesday – November 13, 2009."— Presentation transcript:
1 Macro InvertebratesWednesday – November 13, 2009
2 Bell Ringer 11/17/09In your notebook, arrange the following items into created groups, and why those groups:ForkSpoonShovelToothpickIce cream scoopBucketSpear
3 Aquatic Macroinvertebrates A presentation created by:CREEK CONNECTIONS Box 10, Allegheny College Meadville, PAWhen people think about aquatic life, they think about frogs, fish, crayfish, and lily pads. Many people don’t think about aquatic insects. There are thousands of species. Of the 91,000+ North American insects, 7% are aquatic or semi-aquatic. They can be found in every type of waterway, from a small temporary pond to a forested creek to a large river passing through a city.Illustration source: Microsoft Office Clip Art
4 Aquatic Insect Feeding DetritusShreddersDecomposersIllustrations Source: Aquatic Entomology by W. Patrick McCafferty, 1998Coarse Particulate Organic Matter (CPOM)Cranefly LarvaIllustration Source: Stream Ecology: Structure and Function of Running Waters by J. David Allan, 1995.
5 ShreddersShredders – help to breakdown the clumps of organic materials and detritusDetritus: dead leaves, plants parts, twigs and other organic matterExamples of shredders:Cranefly larvaeCase-building caddisfly larvaeScudsAquatic sowbugsSome small stonefly nymphs
6 Aquatic Insect Feeding Fine Particulate Organic Matter (FPOM)CollectorsFiltering CollectorsGathering CollectorsBrushlegged Mayfly NymphSource of photo: unknownBlackfly LarvaIllustrations Source (both): Aquatic Entomology by W. Patrick McCafferty, 1998
7 Filtering and Gathering Collectors Filtering Collectors – obtain food from bits and pieces in the water column.Examples of filtering collectors:Mayfly nymphsNet-spinner caddisfly larvaeBlackfly larvaeMusselsSome midge larvae
8 Filtering and Gathering Collectors Gathering Collectors – obtain food from the stream bottomExamples of gathering collectors:Some mayfly nymphsSome caddisfly larvaeSome midge larvae
9 Aquatic Insect Feeding Grazers or ScrapersPeriphyton - algae on rocksWater PennyCase-building Caddisfly Larvamacroinv/caddiscase.jpgIllustration Source: Stream Ecology: Structure and Function of Running Waters by J. David Allan, 1995.
10 Grazers/Scrapers Grazers/Scrapers – feed on algae on rocks Examples of grazers/scrapers:Water penniesFlathead mayfly nymphsSnailsCasebuliding caddisfly larvae
11 Aquatic Insect Feeding PredatorsDragonfly LarvaGiant Water BugGiant Water BugIllustrations Source (two above): Aquatic Entomology by W. Patrick McCafferty, 1998
12 Predators Predators – feed on other aquatic insects Examples of predators:Dobsonfly larvaeFishfly larvaeDragonfly nymphsWater bugsMost beetlesCrayfishWater stridersSome stonefly nymphs
13 If you were absent…Copy notes from this presentation.