US Long-Term Ecological Research Network

Cross Lake Comparison at North Temperate Lakes LTER - Benthic Macroinvertebrates 2003

Abstract
Benthic invertebrates were collected in 2003 as part of Coarse Woody Habitat (CWH) study on 10 Biocomplexity - Cross Lake Comparison lakes in Vilas County, WI.
Core Areas
Dataset ID
231
Date Range
-
LTER Keywords
Maintenance
completed
Metadata Provider
Methods
We chose five lakes with high density of houses and five lakes with a low density of houses based on the lakes and housing quintiles developed by Anna Marburg. In each lake, we chose three sites with no wood and three sites with high wood based on the CLC surveys. We took two benthos samples at each site and for the sites with CWH, we took two wood samples. Macroinvertebrates were identified to the lowest possible taxonomic level. Number of sites: 60 Sampling Frequency: once per siteTo characterise the littoral benthic invertebrate community in each lake, invertebrates were collected using an underwater airlift sampler within a 0.25m2 quadrat (see the study by Butkas, Vadeboncoeur & Vander Zanden, 2011, for details about the airlift). This method samples the overall macroinvertebrate community (both epi- and in-faunal species). Samples were collected at a depth of 1 m in triplicate for both sand and cobble habitat in a 500 um mesh bag at the top of the airlift. Samples were transported on ice and hand-sorted within 4 h of collection. Picked specimens were fixed in 70 % ethanol and identified to genus. For statistical analysis, we pooled macroinvertebrate numbers into broad taxonomic groups, namely Tricoptera, Ephemeroptera, Diptera, Amphipoda, Isopoda and Mollusca, because of large among-lake variability in presence at the genus level. Nilsson E, Solomon CT, Wilson KA, Willis TV, Larget B, Vander Zanden MJ. 2012. Effects of an invasive crayfish on benthic invertebrate abundance, fish benthivory and trophic position. Freshwater Biology. 57:10–23
Short Name
HELMUS2
Version Number
21

Food Web Isotope Study at North Temperate Lakes LTER 2004 - 2010

Abstract
Stable isotope ratios (d13C and d15N) were measured in archived scale samples of seven fish species captured in Sparkling Lake over the period 1981 through 2009. Stable isotopes of benthic and pelagic food web end members (macroinvertebrates and zooplankton, respectively) were also measured. Zooplankton were from samples taken in Sparkling Lake, Allequash Lake, and Big Muskellunge Lake. Zoobenthos were from samples taken in Sparkling Lake. Isotope Study abstract paragraph 2 Number of sites: 3
Core Areas
Dataset ID
261
Date Range
-
Maintenance
completed
Metadata Provider
Methods
Stable isotope ratios (d13C and d15N) were measured in archived scale samples of seven fish species captured in Sparkling Lake over the period 1981 through 2009. Stable isotopes of benthic and pelagic food web end members (macroinvertebrates and zooplankton, respectively) were also measured. Zooplankton were from samples taken in Sparkling Lake, Allequash Lake, and Big Muskellunge Lake. Zoobenthos were from samples taken in Sparkling Lake.
Short Name
CTSISO
Version Number
18
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