3 Works

Data from: Integrating water quality monitoring and diatom community trends to determine landscape-level change in protected lakes.

Joy Ramstack Hobbs, Adam Heathcote, David VanderMeulen & Mark Edlund
These data represent water quality measurements and diatom counts from surface sediments collected from lakes in five National Park units in the Great Lakes Region (USA) between 2005 and 2018. Water quality measurements were made three times annually during the growing season; data are presented as growing season means. Surface sediment samples were collected from the same lakes every 3-5 years over more than a decade to analyze diatom community turnover. Diatom data are presented...

Data from: The legacy of large regime shifts in shallow lakes

Joy M. Ramstack Hobbs, William O. Hobbs, Mark B. Edlund, Kyle D. Zimmer, Kevin M. Theissen, Natalie Hoidal, Leah M. Domine, Mark A. Hanson, Brian R. Herwig & James B. Cotner
Ecological shifts in shallow lakes from clear-water macrophyte-dominated to turbid-water phytoplankton-dominated are generally thought of as rapid short-term transitions. Diatom remains in sediment records from shallow lakes in the Prairie Pothole Region of North America provide new evidence that the long-term ecological stability of these lakes is defined by the legacy of large regime shifts. Here we examine the modern and historical stability of eleven shallow lakes. Currently, four of the lakes are in a...

Data from: Watershed versus within-lake drivers of nitrogen: phosphorus dynamics in shallow lakes

Luke J. Ginger, Kyle D. Zimmer, Brian R. Herwig, Mark A. Hanson, William O. Hobbs, Gaston E. Small & James B. Cotner
Research on lake eutrophication often identifies variables affecting amounts of phosphorus (P) and nitrogen (N) in lakes, but understanding factors influencing N:P ratios is important given its influence on species composition and toxin production by cyanobacteria. We sampled 80 shallow lakes in Minnesota (USA) for three years to assess effects of watershed size, proportion of watershed as both row crop and natural area, fish biomass, and lake alternative state (turbid versus clear) on total N:...

Registration Year

  • 2022
  • 2017
  • 2016

Resource Types

  • Dataset


  • Science Museum of Minnesota
  • University of Minnesota
  • Minnesota Department of Natural Resources
  • University of St. Thomas
  • National Park Service