EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
6/06/2017 | 11:15 AM - 11:30 AM | DO RIVERS HAVE RHYTHM? MEASURING AND MODELING THE PRODUCTIVITY REGIMES OF FLOWING WATERS | 302B
DO RIVERS HAVE RHYTHM? MEASURING AND MODELING THE PRODUCTIVITY REGIMES OF FLOWING WATERS
Seasonal variations in gross primary productivity (GPP) are related to climatic conditions in many terrestrial, marine, and lentic systems. The phenology of productivity in these systems has been extensively described, analyzed, and modeled with respect to their primary forcings. The same cannot be said for river ecosystems. Annual regimes of light and temperature are often uncorrelated in rivers due to light attenuation from riparian canopies, sediment loads, or colored organic matter. Intense and frequent storm disturbances in rivers may significantly reduce autotrophic biomass and allochtonous energetic subsidies to river heterotrophs may match or exceed in situ GPP. Therefore, we expect that the seasonality of productivity in river ecosystems can be described as a function of light, disturbance, and nutrient regimes instead of broad climatic patterns. A global effort to measure, synthesize, and model metabolism across many river ecosystems is necessary to disentangle the hierarchy of these controls on freshwater metabolism. Here we report the first attempts at characterizing and modeling the metabolic regimes of rivers with contrasting light, disturbance, and allochtonous input regimes across several hundred U.S. rivers.
- S24 Towards a predictive freshwater ecology: using time-series data to understand and forecast responses to a changing environment
- C32 Primary and Secondary Production
- S29 Macrosystem Ecology of Aquatic Systems
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Presenters/Authors
Philip Savoy
(), Duke University, prs15@duke.edu;
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Jim Heffernan
(), Duke University, james.heffernan@duke.edu;
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Alison Appling
(), US Geological Survey, alison.appling@gmail.com;
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Emily Bernhardt
(), Duke University, ebernhar@duke.edu;
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