2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/27/2021  |   2:00 PM - 3:30 PM   |  CLIMATE-DRIVEN CHANGES IN HYDROPERIOD ALTER THE CONTRIBUTION OF ANIMAL-DRIVEN NUTRIENT SUPPLY TO ECOSYSTEM NUTRIENT DEMAND   |  Virtual Platform

CLIMATE-DRIVEN CHANGES IN HYDROPERIOD ALTER THE CONTRIBUTION OF ANIMAL-DRIVEN NUTRIENT SUPPLY TO ECOSYSTEM NUTRIENT DEMAND

We use nutrient excretion rates (NH4-N and SRP), benthic invertebrate and salamander abundances, and nutrient uptake rates to estimate pond-level nutrient supply and demand along a pond-permanence gradient of 12 subalpine ponds in the U.S. Rocky Mountains. Biomass predicts taxon-specific supply across habitats, and consequently, animal-driven supply is greatest in permanent habitats where biomass is greatest. Animal driven N supply exceeds demand in permanent and semi-permanent habitats, whereas P supply meets demand. Conversely, temporary ponds have a large deficit in N and P supply. Combined with lower biomass in temporary ponds, differences in patterns of supply relative to demand are consistent with losing a dominant supplier (oligochaetes) and large reduction in biomass of another (chironomids). Rank- order taxon-specific supply differs among habitats, with supply more evenly distributed among taxa in temporary ponds. Conversely, in permanent ponds supply is dominated by few taxa. The absence or lower biomass of dominant suppliers in temporary ponds creates supply deficits and possibly nutrient limitation of productivity. Therefore, as climate warming shortens hydroperiods and prompts biomass declines and compositional shifts, nutrient limitation may arise due to loss of animal-driven supply, potentially also reducing landscape-scale nutrient retention.

  • Biological effects
  • Climate change
  • Ecosystem functioning

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Presenters/Authors

Jared Balik (), North Carolina State University, Rocky Mountain Biological Laboratory, jabalik2@ncsu.edu;


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Emily Jameson (), University of Michigan, jaemily@umich.edu;


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Howard Whiteman (), Murray State University, hwhiteman@murraystate.edu;


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Brad Taylor (), North Carolina State University Dept. of Applied Ecology; Rocky Mountain Biological Laboratory, bwtaylo3@ncsu.edu ;


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