2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/06/2017 | 9:00 AM - 9:15 AM | SIMPLE, TIME-SCALE BASED APPROACHES FOR EXPLAINING PHYTOPLANKTON DYNAMICS | 306B
SIMPLE, TIME-SCALE BASED APPROACHES FOR EXPLAINING PHYTOPLANKTON DYNAMICS
Time scales and their ratios represent a convenient tool for capturing multiple disparate processes, placing them in a single comparable currency, and collapsing partial differential equations into intuitive, graphical representations of just a couple variables. Despite their simplicity, time scale based relationships work well in describing and explaining the drivers underlying a wide range of observed patterns in phytoplankton across space and time. I will present examples of how time scale relationships have been used to explain and collapse complex dynamics observed in nature and depicted by more intricate numerical models. One such example, which focuses on the relationship between phytoplankton biomass and residence time, reveals the somewhat unintuitive tripartite relationship between those two quantities: phytoplankton biomass can increase, decrease, or not change at all as residence time increases. The particular relationship that occurs is determined by the relative rates (or, inversely, time scales) of phytoplankton growth and in situ loss. Processes operating and competing in the vertical dimension (which are particularly relevant to the dynamics of cyanobacteria) may also be described by relationships of physical and biological time scales.
- C32 Primary and Secondary Production
- C24 Eutrophication
- S20 Understanding physical controls on cyanobacteria dominance: toward prediction and prevention
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Presenters/Authors
Lisa Lucas
(), U.S. Geological Survey, llucas@usgs.gov;
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Janet Thompson
(), U.S. Geological Survey, jthompso@usgs.gov;
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Larry Brown
(), U.S. Geological Survey, lrbrown@usgs.gov;
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