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Macro Invertebrates Wednesday – November 13, 2009.

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Presentation on theme: "Macro Invertebrates Wednesday – November 13, 2009."— Presentation transcript:

1 Macro Invertebrates Wednesday – November 13, 2009

2 Bell Ringer 11/17/09 In your notebook, arrange the following items into created groups, and why those groups: –Fork –Spoon –Shovel –Toothpick –Ice cream scoop –Bucket –Spear

3 Illustration source: Microsoft Office Clip Art Aquatic Macroinvertebrates A presentation created by: C REEK C ONNECTIONS Box 10, Allegheny College Meadville, PA

4 Aquatic Insect Feeding Detritus Decomposers Shredders Coarse Particulate Organic Matter (CPOM) Illustrations Source: Aquatic Entomology by W. Patrick McCafferty, 1998 Illustration Source: Stream Ecology: Structure and Function of Running Waters by J. David Allan, Cranefly Larva rts/bugnumbr.html

5 Shredders Shredders – help to breakdown the clumps of organic materials and detritus –Detritus: dead leaves, plants parts, twigs and other organic matter Examples of shredders: –Cranefly larvae –Case-building caddisfly larvae –Scuds –Aquatic sowbugs –Some small stonefly nymphs

6 Fine Particulate Organic Matter (FPOM) Filtering CollectorsGathering Collectors Aquatic Insect Feeding Collectors Source (both): Aquatic Entomology by W. Patrick McCafferty, 1998 Brushlegged Mayfly Nymph Blackfly Larva Source of photo: unknown

7 Filtering and Gathering Collectors Filtering Collectors – obtain food from bits and pieces in the water column. Examples of filtering collectors: –Mayfly nymphs –Net-spinner caddisfly larvae –Blackfly larvae –Mussels –Some midge larvae

8 Filtering and Gathering Collectors Gathering Collectors – obtain food from the stream bottom Examples of gathering collectors: –Some mayfly nymphs –Some caddisfly larvae –Some midge larvae

9 Periphyton - algae on rocks Aquatic Insect Feeding Grazers or Scrapers Illustration Source: Stream Ecology: Structure and Function of Running Waters by J. David Allan, aticinvertebrates/folderaquaticinse cts/wpenn.html macroinv/caddiscase.jpg Water Penny Case-building Caddisfly Larva

10 Grazers/Scrapers Grazers/Scrapers – feed on algae on rocks Examples of grazers/scrapers: –Water pennies –Flathead mayfly nymphs –Snails –Casebuliding caddisfly larvae

11 Aquatic Insect Feeding Predators Illustrations Source (two above): Aquatic Entomology by W. Patrick McCafferty, Dragonfly Larva Giant Water Bug

12 Predators Predators – feed on other aquatic insects Examples of predators: –Dobsonfly larvae –Fishfly larvae –Dragonfly nymphs –Water bugs –Most beetles –Crayfish –Water striders –Some stonefly nymphs

13 If you were absent… Copy notes from this presentation.


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