[Personnel: Last_Name='BENSON', Middle_Name='J.', First_Name='BARBARA']
Long-Term Ecological Research (LTER)/NTL010: Determination of Pelagic Fish Abundance in North Temperate Lakes Primary Study LakesEntry ID: LTER_NTL010
Abstract: LTER - Long-Term Ecological Research Program/North Temperate Lakes (NTL)
LTER/NTL010 [Summary adapted from the LTER Core Data Set Catalog]:
Data are collected along a set of transects in each of five lakes
(Allequash, Big Muskellunge, Crystal, Sparkling, and Trout), using a
Simrad 70 khz machine with the transducer suspended in front of the
Transects are run on two nights and two days in ... late summer. The
returning acoustic signal is recorded on audio tape, as well as on
paper charts. The recorded signal is analyzed using the HADAS package
to produce fish densities, by size, for each discrete depth in the
The North Temperate Lakes (NTL) site is affiliated with the Center for
Limnology at the University of Wisconsin, Madison. The NTL site
focuses its research on north temperate lake ecosystems in the
Northern Highland Lakes District of Wisconsin. The Northern Highland
Lakes District, has an area of approximately 10,000 sq. km. and has
one of the highest concentrations of lakes in the world. Lakes range
in size from 0.1 to 1,500 ha, in depth from 1 to 33 m, and in
fertility from oligotrophic to eutrophic. Other representative
limnological conditions include: rainwater dominated, groundwater
dominated and drainage lakes; dystrophic lakes; lakes with varved
sediments, winterkill lakes, temporary and permanent forest ponds, and
reservoirs. Lakes are influenced by strong seasonality and are usually
ice covered from late November to late April. Lakes within the
Northern Highland exhibit near-natural water quality conditions.
Nearly 80% of the land area and two-thirds of the lake frontage are
Information about LTER is also available on-line at
(Click for Interactive Map)
Start Date: 1981-07-27
TERRESTRIAL HYDROSPHERE > SURFACE WATER > LAKES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH
BIOSPHERE > AQUATIC ECOSYSTEMS > PELAGIC HABITAT
BIOSPHERE > AQUATIC ECOSYSTEMS > LAKES
BIOSPHERE > AQUATIC ECOSYSTEMS > MARINE HABITAT
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > POPULATION DYNAMICS
Phone: (715) 356-9494
Fax: (715) 356-6866
Email: tkkratz at facstaff.wisc.edu
Email: tkratz at LTERnet.edu
University of Wisconsin Trout Lake Station 10810 County Highway N
City: Boulder Junction
Province or State: WI
Postal Code: 54512
Role: TECHNICAL CONTACT
Phone: (608) 262-3014
Fax: (608) 262-2340
Email: jmagnuson at LTERnet.edu
Email: jmagnuson at macc.wisc.edu
University of Wisconsin-Madison Center for Limnology 680 N. Park Street
Province or State: WI
Postal Code: 53706
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov
Kratz, T. K.; Magnuson, J. J.; Bowser, C. B. (sic); Frost, T. M. 1986.
"Rationale for data collection and interpretation in the Northern
Lakes Long-Term Ecological Research Program", In B. G. Isom, ed.
Rationale for Sampling and Interpretation of Ecological Data in the
Assessment of Freshwater Systems: a Symposium Sponsored by ASTM
Committee D-19 on Water, American Society for Testing and Materials,
Philadelphia, PA October 31 - November 1, pp. 22-33.
Magnuson, J. J.; Kratz, T. K. 1982. "Northern lakes LTER site", In J.
C. Halfpenny, ed. Long-Term Ecological Research in the United States:
A Network of Research Sites 1982, LTER Program Steering Committee, pp.
Magnuson, J. J.; Bowser, C. J.; Kratz, T. K. 1984. "Long-term
ecological research on north temperate lakes (LTER)", Verh. Internat.
Verein. Limnol., Vol. 22, pp. 533-535.
Magnuson, J. J.; Paszkowski, C. A.; Rahel, F. J.; Tonn, W. M. 1989.
"Fish ecology in severe environments of small isolated lakes in
northern Wisconsin", In R. R. Sharitz and J. W. Gibbons, eds.
Freshwater Wetlands and Wildlife Conference-8603101, #61, USDOE office of
Scientific and Technical Information, Oak Ridge, Tennessee, pp.
Magnuson, J. J. 1991. "Fish and fisheries ecology", Ecological
Applications, Vol. 1, pp. 13-26.
Magnuson, J. J.; Benson, B. J.; McClain, A. S. 1994. "Fish species richness
and turnover over 11 years in seven Wisconsin lakes: Insights from a
Long-Term Ecological Research site", American Zoologist, In Press.
See also: http://limnosun.limnology.wisc.edu/cgi-bin/bibliography.cgi
Creation and Review Dates
Last DIF Revision Date: 2004-02-09