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.
Primary production is perhaps one of the most fundamental processes in ecosystems and is a foundation of understanding long-term ecosystem dynamics among LTER sites. There is a long history of estimating primary production in both freshwater and marine ecosystems using 14carbon (14C) incubations. An advantage of the 14C approach is the ability to quantify production in systems with low production. On the other hand, due to logistical challenges of 14C incubations, obtaining high temporal resolution estimates (e.g., daily production) is difficult and cost prohibitive. Thus, whole ecosystem estimates of ecosystem production at daily to annual time scales often necessitate interpolating between infrequent measurements.
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.