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North Temperate Lakes LTER Vilas County Buildings

Building locations in Vilas County, Wisconsin

North Temperate Lakes LTER Vilas County Roads

Roads map of Vilas County, Wisconsin

North Temperate Lakes LTER: Boat Traffic Through Yahara Locks 1976 - 2011

One of the dominant uses of the Madison area lakes is for boating. In order to develop a long term data set on the temporal fluctuations and trends in such activity, the LTER project has obtained records of boat traffic that passes through the locks at the head of the Yahara River on its stretch between Lake Mendota and Lake Monona. This data was gathered by the Dane County Department of Public Works as part of the County''s ongoing monitoring of its own facilities and their use. This data set will be augmented as the Department of Public Works makes updates available. Data is currently only available through 2011. Sampling Frequency: tallied daily April through October; exact starting dates vary each year Number of sites: 1

North Temperate Lakes LTER Yahara Lakes District Boundary

This data set defines the spatial extent of the Yahara Lakes District (aka Madison Lakes Region)

North Temperate Lakes LTER Yahara Lakes District Bathymetry

Bathymetry for lakes in the Yahara Lakes District (aka Madison Lakes Region).

North Temperate Lakes LTER Yahara Lakes District Riparian Vegetation

Riparian buffer strips within the Lake Mendota watershed

North Temperate Lakes LTER Dane County Major Roads

Major roads in Dane County, Wisconsin

North Temperate Lakes LTER Vilas County Parcels

Parcel boundaries for selected townships in Vilas County, Wisconsin.

North Temperate Lakes LTER: Chemical Limnology of Lake Mendota: Major Ions 1940 - 1995

Chloride, Sodium and Sulfate concentrations in Lake Mendota. 1940 - 1987 data are annual averages collected and processed by Richard Lathrop Lathrop, R. C. (1988). Chloride and sodium trends in the Yahara lakes. Bureau of Research, Wisconsin Department of Natural Resources. 1988 - 1995 data are collected by the Wisconsins DNR and are also available in Storet.

Long-term fish abundance data for Wisconsin Lakes Department of Natural Resources and North Temperate Lakes LTER 1944 - 2012

This dataset describes long-term (1944-2012) variations in the relative abundance of fish populations representing nine species in Wisconsin lakes. Data were collected by Wisconsin Department of Natural Resource fisheries biologists as part of routine lake fisheries assessments. Individual survey methodologies varied over space and time and are described in more detail by Rypel, A. et al., 2016. Seventy-Year Retrospective on Size-Structure Changes in the Recreational Fisheries of Wisconsin. Fisheries, 41, pp.230-243. Available at: http://afs.tandfonline.com/doi/abs/10.1080/03632415.2016.1160894

Long-term fish size data for Wisconsin Lakes Department of Natural Resources and North Temperate Lakes LTER 1944 - 2012

This dataset describes long-term (1944-2012) variations in individual fish total lengths from Wisconsin lakes. The dataset includes information on 1.9 million individual fish, representing 19 species. Data were collected by Wisconsin Department of Natural Resource fisheries biologists as part of routine lake fisheries assessments. Individual survey methodologies varied over space and time and are described in more detail by Rypel, A. et al., 2016. Seventy-Year Retrospective on Size-Structure Changes in the Recreational Fisheries of Wisconsin. Fisheries, 41, pp.230-243. Available at: http://afs.tandfonline.com/doi/abs/10.1080/03632415.2016.1160894

Cascade project at North Temperate Lakes LTER - Daily data for key variables in whole lake experiments on early warnings of critical transitions, Paul and Peter Lakes, 2008-2011

Peter Lake's food web was altered by adding largemouth bass at a slow rate while monitoring key food web constituents including littoral minnow abundance indexed as catch per trap per hour, zooplankton biomass, and concentration of chlorophyll a. Paul Lake was manipulated and the same variables were measured there. In Peter Lake, we expected littoral catch of minnows to first increase as minnows moved into the littoral zone due to the threat of bass predation and then decrease due to bass predation. We expected zooplankton biomass to increase as minnows moved into the littoral zone. We expected chlorophyll to decrease due to increased grazing by zooplankton. We expected that variance and autocorrelation of chlorophyll would increase as the food web passed a critical transition. We expected that the time series in Paul Lake would represent the normal variability of an unmanipulated lake

openCC (other)Apr 2024View details →

North Temperate Lakes LTER Zooplankton conversion formulas length to biomass

Formulas for calculating zooplankton biomass based on measured length for species encountered in NTL's northern lakes. Formulas are either based on literature reports or measurements in particular research lakes. The mass unit in the formula is micrograms.

North Temperate Lakes LTER: Vilas County Property Tax Records 1997 - 2004

Each year, the county government in Vilas County, WI, assembles data on each parcel of property in the county for various governmental administrative purposes. These records serve the register of deeds, the department of taxation, and other county departments, as well as private citizens or businesses, such as realtors, who seek information on properties in the county. These records include assessments of the value of land and built improvements, their location, the name and mailing address of the owner, and other data. LTER has begun to collect these data each year from the county as a means of monitoring owners, and the social identities of owners (whether they are state agencies, private individuals, corporations, non-profit/conservation organizations, etc.). These data have already proved useful as a sampling frame for social science surveys. This data set includes property tax records for Vilas County for the years 1997, 1998, 2001, 2003, and 2004. Sampling Frequency: annually Number of sites: 15 Townships of Vilas County, WI, USA

openCC (other)Dec 2025View details →

Cascade Project at North Temperate Lakes LTER: Weekly dissolved methane profiles (2018, 2019, and 2024)

Weekly profiles of dissolved methane concentrations, dissolved oxygen, temperature, and light were measured during three summers (2018, 2019, and 2024) in two north temperate lakes. One of the lakes was experimentally enriched with nitrogen and phosphorus during two summers (2019 and 2024), and darkened using a blue dye in one summer (2024). The other lake was an unmanipulated reference. Using this series of whole-lake enrichment and shading experiments across three years with varying ice phenology, we assessed how eutrophication and ice cover affect within-year methane storage.

Cascade Project at North Temperate Lakes LTER: Primary Production 1984 - 1990

CASCADE Primary Production Dataset Sampling Frequency: varies Number of sites: 3

Cascade Project at North Temperate Lakes LTER: Piscivore Fish 1984 - 2003

Fish collected for the Casade Project. Sampling Frequency: varies Number of sites: 9

Landscape Position Project at North Temperate Lakes LTER: Chemical Limnology 1998 - 2000

Parameters characterizing the chemical limnology and spatial attributes of 51 lakes were surveyed as part of the Landscape Position Project. Parameters are measured at or close to the deepest part of the lake. The following parameters are measured one meter from the surface and two meters from the bottom of the lake: pH, total phosphorus, total nitrogen, total silica. The following parameters are measured one meter from the surface: dissolved organic carbon, total organic carbon, dissolved inorganic carbon, total inorganic carbon, spectrophotometric absorbance (color scan), major anions and cations, alkalinity. Sampling Frequency: once for conservative parameters (major ions, carbon, color, alkalinity); monthly for one summer for other parameters (chlorophyll, nitrogen, phosphorus, pH, silica, temperature, dissolved oxygen, and conductivity) Number of sites: 51

Landscape Position Project at North Temperate Lakes LTER: Chlorophyll 1998 - 2000

Parameters characterizing the chemical limnology and spatial attributes of 49 lakes were surveyed as part of the Landscape Position Project. Most parameters are measured at or close to the deepest part of the lake. Chlorophyll is measured by collecting separate integrated samples from the epilimnion, metalimnion, and hypolimnion Sampling Frequency: generally monthly for one summer; for some lakes, one or two samples in one summer Number of sites: 51

Landscape Position Project at North Temperate Lakes LTER: Lake Characteristics 1998 - 2000

Parameters characterizing the chemical limnology and spatial attributes of 47 lakes were surveyed as part of the Landscape Position Project. Lake characteristics compiled here include lake area and perimeter, catchment area, mean and maximum depth, shoreline development factor, elevation and percent wetlands within catchment area. Lake order was determined using a modification of the method of Riera et al. (2000). Lake order is a numerical surrogate for groundwater influx and hydrological position along a drainage network, with the highest number indicating the lake lowest in a watershed. Lake order for each lake was determined by field visit with presence/absence of streams confirmed, not base solely on topographic maps. Riera, Joan L., John J. Magnuson, Tim K. Kratz, and Katherine E. Webster. 2000. A geomorphic template for the analysis of lake districts applied to Northern Highland Lake District, Wisconsin, U.S.A. Freshwater Biology 43:301-18. Number of sites: 49