North Temperate Lakes Long Term Ecological Research studies the ecology of lakes as one of a network of sites established by the National Science Foundation. We are interested in how biophysical setting, climate, and changing land use and cover interact to shape lake characteristics and dynamics over time (past, present, future).
Our primary study sites include a set of seven northern Wisconsin and four southern Wisconsin lakes and their surrounding landscapes. The project, which started in 1981, is administered by the Center for Limnology at the University of Wisconsin-Madison.
Excessive inputs of phosphorus (P) have long been known to cause excessive blue-green algal blooms and other eutrophication symptoms in lakes. To predict how an individual lake would respond to changes in P inputs, scientists frequently have relied on models that link P inputs to in-lake P concentrations, which can be linked to summer algal densities or chlorophyll (Chl) concentrations. These models were derived from cross-sectional analyses of many lakes and predict average concentrations of P or Chl at steady state conditions of P inputs - a condition that rarely occurs due to variability in runoff and other drivers. Large prediction uncertainties exist when the models are applied to any one lake thus making model predictions difficult to interpret ....
This material is based upon work supported by the National Science Foundation under Cooperative Agreement #DEB-0822700, NTL LTER. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.