2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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6/08/2017  |   2:45 PM - 3:00 PM   |  NO DIFFERENCE IN THE RATE OF LEAF LITTER PROCESSING BETWEEN A NATIVE AND NON-NATIVE CRAYFISH   |  305A

NO DIFFERENCE IN THE RATE OF LEAF LITTER PROCESSING BETWEEN A NATIVE AND NON-NATIVE CRAYFISH

Non-native crayfish may alter material processing and the food-webs of the systems they invade. Our study compared the impact of a native and non-native crayfish on leaf litter processing in 1250 L outdoor mesocosms. Four individuals of a native crayfish (Cambarus sp. C) were housed with 0, 2, 4, or 6 individuals of a non-native crayfish (Orconectes virilis), plus a non-native only treatment with 4 individuals of O. virilis. Each tank received 3, 1.5 g leaf packs constructed of senescent Liriodendron tulipifera leaves bound with a binder clip. We quantified AFDM loss of a randomly selected leaf pack on days 2, 10, and 24. The decay coefficient (k) ranged between -0.2321 and -0.0146 per day with a mean k (pm SD) of -0.0660 (pm 0.0546) per day. There was no effect of the density of the non-native crayfish nor was there a difference on the rate of leaf decay between the native only and non-native only treatments. Our results suggest that the non-native species tested in our study is functionally redundant with the native with respect to leaf litter processing.

  • C12 Conservation Ecology
  • C03 Invertebrates
  • S12 Challenges, insights, and opportunities in crayfish conservation and ecology

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Presenters/Authors

Jonathan Milisci (), Longwood University, jonathan.milisci@live.longwood.edu;


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Jessica Hoak (), Virginia Tech, jessica.hoak@live.longwood.edu;


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Sujan Henkanaththegedara (), Longwood University, henkanaththegedarasm@longwood.edu;


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David Conner (), Longwood University, david.conner@live.longwood.edu;


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Connor Perry (), Longwood University, connor.perry@live.longwood.edu;


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