2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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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;