Jake Vander Zanden

University of Wisconsin
226 Center for Limnology
680 North Park Street
Madison, WI 53706
(608) 262-9464

Research Projects

Can an ecosystem dominated by an invasive species be forced into an alternate stable state of low invader abundance? Invasive rusty crayfish (Orconectes rusticus) adversely affect native biota when present at high densities; however, at low densities their effects are minimal.  Lakes with high and low densities of rusty crayfish may represent alternate stable states, meaning that crayfish at low densities could be maintained ...

Invasive species are a leading threat to aquatic biodiversity and ecosystems. Because invasions are among the most irreversible of human impacts, prevention is the most important approach for dealing with this problem. But with approximately 15,000 lakes in Wisconsin, how do we focus our efforts most effectively? We have been working with a variety of researchers on what we call 'smart prevention' projects. The idea is to identify lakes that are most likely to be invaded and most likely to be impacted by an invader.

WICCI represents a unique and innovative process to develop a statewide climate change adaptation strategy. WICCI has formed through a non-bureaucratic, bottom-up approach to engage scientists, researchers and management agencies in understanding the impacts of climate change on communities and natural resources across the state, and to develop strategies to make them more resilient to climate change.

How do lake levels affect invaded ecosystems in northern Wisconsin? Lake levels in northern Wisconsin are currently at historic lows, and climate models predict this trend to continue.  Lowered lake levels affect littoral habitats and associated communities; however specific effects on native and invasive species are poorly understood ...

Invasive species are often a major threat to native species and biodiversity, and consequently to the social value of ecosystems. In the absence of good modeling of the economics and ecology of human-caused species dispersal, identifying management policies that best serve social objectives with respect to the control and prevention of the spread of invasive species is unlikely if not impossible. This project develops an integrated economic and ecological model to examine the spread of aquatic invasive species (AIS) in a freshwater lake system where recreational boaters are the principle vector of dispersal. The model is applied to an investigation of a large lake system in northern Wisconsin.