The effects of invasive crayfish Orconectes rusticus on local freshwater ecology Anthony Bonifonte Mentor Angie Roles
Rusty native range Rusty invasive range
Species # of Species Standard Number of present deviation sites rusty 42 11.83 8 sanborn 51.3 5.1 9 p= .0483 Macroinvert. species richness 1998 60 50 # species present 40 rusty 30 sanborn 20 10 0 rusty sanborn
Species # of Species Standard Number of present deviation sites rusty 50 3.46 3 sanborn 43.2 19.6 9 p=.5796 Macroinvert. species richness 2002 60 50 # species present 40 rusty 30 sanborn 20 10 0 rusty sanborn
Present only at sanborn sites Species % of san. sites present at Erpobdella punctata (leech) 38.9 Optioservus (riffle beetles) 38.9 Parametriocnemus (midges) 33.3 Chrysops (deer/horse flies) 50 Present only at rusty sites Species % of rusty sites present at Neoperla clymene (stoneflies) 45.5 Petrophila (moths) 45.5 Telopelopia okoboji (midges) 45.5
Snails 10 species total Species # of species present St. dev. N rusty 1.36 1.206 11 sanborn 2.11 1.08 18 p=.0938 Mollusks 23 species total Species # of species present St. dev. N rusty 2.45 1.206 11 sanborn 4.06 1.08 18 p=.1101
Percent Sanborn Composition Site 2007 2008 2009 2010 Downstream LLB 12 25 5 7 HRM 30 49 19 31 HWB n/a 73 47 48 HTR 73 80 72 86 Upstream HML n/a 100 100 100
Sanborn % LLB 0.3 0.25 0.2 0.15 0.1 0.05 0 2007 2008 2009 2010
Sanborn % HRM 0.6 0.5 0.4 0.3 0.2 0.1 0 2007 2008 2009 2010
Sanborn % HWB 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 2007 2008 2009 2010
Thank you!!
Acknowledgements I would like to thank my mentor Angie Roles for all her guidance and support; OCRF and Randal Doane for making this research possible; professor Roger Laushman for leading field studies and assistance; Dennis Mishne at the Ohio EPA for sending me data files and answering questions; and Marta Robertson, Sierra Zuber, Katherine Muller, Catherine Durkin, and Sarah Bolinger for assisting in collecting field samples.
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