2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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5/21/2019  |   2:00 PM - 2:15 PM   |  SIMPLE TWIST OF RATES -- COMMUNITY MODELS FOR SEASONAL ECOSYSTEMS   |  251 DE

SIMPLE TWIST OF RATES -- COMMUNITY MODELS FOR SEASONAL ECOSYSTEMS

Most organisms exist in seasonal environments where energy and nutrients change with temperature, rainfall, and other factors. While seasonal environments certainly influence organisms by shaping phenology and other life history components, biotic interactions among species may in turn influence the availability of nutrients and energy within ecosystems. “Coupled matrix models” are a new modeling tool for exploring the complex interactions that arise in ecosystems experiencing strong seasonal effects and disturbances. Species (or guilds of species) are represented as stage-structured populations linked together via aggregate density-dependence on a central ecosystem resource, such as space or nutrient availability. Sensitivity and network analysis then allow the identification of strong and weak biotic interactions, as well as the projection of future community dynamics under novel, non-stationary environments such as those imposed by climate change. Applications using riparian vegetation and fish communities identified pairwise species interactions that impose controls on the distribution and abundance of plant and fish biomass, but also identified climate scenarios where these interactions are likely to weaken or disappear entirely. Understanding feedbacks between population dynamics and ecosystem responses will help us navigate complex phenological changes due to climate change.

  • Disturbance
  • ClimateChange
  • Life History

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Presenters/Authors

Dave Lytle (), Oregon State University, lytleda@oregonstate.edu;


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