2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/06/2017 | 2:45 PM - 3:00 PM | HYDROLOGIC CONTROLS OF BURROWING CRAYFISH DISTRIBUTIONS | 305A
HYDROLOGIC CONTROLS OF BURROWING CRAYFISH DISTRIBUTIONS
Anthropogenic activities have created a crisis for freshwater taxa, particularly crayfish, which rank as the second most imperiled aquatic group in North America. Burrowing species compose only 15% of North American crayfishes; however, they constitute 32% of those imperiled. To aid in the conservation of burrowing crayfishes, we assessed the habitat of one primary burrower, Cambarus harti. Groundwater hydrology and chemistry were monitored from wells (<2m deep) installed near burrows and in similar areas without burrows at 4 Georgia locations for at least 1 year. Soils were characterized using 3 borings collected near wells (<10m). Groundwater was acidic and mostly hypoxic. Soils were 85.5% sand and 11.3% silt/clay but similar among wells with and without burrows. Water chemistry showed no consistent differences across burrow and non-burrow wells. However, groundwater levels near C. harti burrows were ~3 times closer to ground surface than areas without burrows. Thus, C. harti persisted in habitats with water near the ground surface (<50cm). While this species can tolerate fluctuating groundwater levels, prolonged depression of water table could jeopardize the viability of its populations.
- C12 Conservation Ecology
- C03 Invertebrates
- S12 Challenges, insights, and opportunities in crayfish conservation and ecology
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Presenters/Authors
Troy Keller
(), Columbus State Unviersity, keller_troy@columbusstate.edu;
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Jess Gilmer
(), SynTerra Corp., jgilmer@synterracorp.com;
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