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Effect of the nuisance diatom Didymosphenia geminata on invertebrates in the East River

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Effect of the nuisance diatom Didymosphenia geminata on invertebrates in the East River

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    1. Clancy Brown William Smith College Rocky Mountain Biological Lab Mentor: Brad W. Taylor Effect of the nuisance diatom Didymosphenia geminata on invertebrates in the East River

    2. What is Didymo?

    4. Blooms of Rock Snot?

    5. Questions Does D. geminata alter the composition and abundance of stream invertebrates? (2) Does D. geminata affect the growth rate of stream invertebrates?

    7. Removal Plots

    8. I’m good at removing didymo!

    9. Three invertebrate species showed habitat selection

    10. Didymo has no effect on species richness

    11. Two Experiments in the East River: Growth Chambers

    12. Epeorus longimanus shows a trend towards slower growth rate in Didymo

    13. Didymo has no effect on the growth rate of Baetis spp

    14. Summary: Effect of D. geminata on stream invertebrates Composition and abundance - More Chironomidae and stoneflies (Hesperoperla), but fewer E. longimanus in D. geminata treatment No difference in species richness Growth rate A trend for slower growth in E. longimanus No significant effect on Baetis spp

    15. Acknowledgements Brad W. Taylor The “Benthettes” The National Science Foundation Rocky Mountain Biological Laboratory

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