Long-Term Ecological Research (LTER)/NTL001: Physical Limnology of North Temperate Lakes Primary Study LakesEntry ID: LTER_NTL001
Abstract: LTER - Long-Term Ecological Research Program/North Temperate Lakes (NTL)
LTER/NTL001 [Summary adapted from the LTER Core Data Set Catalog]:
Parameters characterizing the physical limnology of the seven primary
lakes (Allequash, Big Muskellunge, Crystal, Sparkling, and Trout lakes
and unnamed lakes 27-02, and 12-15) are measured at one station in the
deepest part of each lake at 0.25-m to 1-m ... depth intervals depending
on the lake.
Parameters include lake level (measured at the shoreline), water
temperature, vertical penetration of photosynthetically active
radiation (PAR), secchi disk depth, dissolved oxygen, ice thickness,
and snow depth on lake. Additional derived parameters include PAR
extinction coefficients for the water column and the epilimnion, and
percent oxygen saturation. Auxiliary data include time of day, air
temperature, wave height, cloud cover, and wind speed and direction.
Special Comments: These measurements are made concurrently with
parameters listed in chemical (NTL002) and plankton (NTL003)
databases. Derived data sets containing epilimnetic averages and
hypsometrically weighted averages over depths are also available.
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
NTL LTER research topics include physical, chemical, and biological
limnology; hydrology and geochemistry; climate forcing; producer and
consumer ecology; ecology of invasions; ecosystem varibility;
lakescape and landscape ecology.
Information about LTER is also available at
(Click for Interactive Map)
Start Date: 1981-01-01
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS
ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD FREQUENCY
BIOSPHERE > VEGETATION > PHOTOSYNTHETICALLY ACTIVE RADIATION
CRYOSPHERE > SNOW/ICE > ICE DEPTH/THICKNESS
CRYOSPHERE > SNOW/ICE > LAKE ICE
CRYOSPHERE > SNOW/ICE > SNOW DEPTH
TERRESTRIAL HYDROSPHERE > SNOW/ICE > ICE DEPTH/THICKNESS
TERRESTRIAL HYDROSPHERE > SNOW/ICE > LAKE ICE
TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW DEPTH
TERRESTRIAL HYDROSPHERE > SURFACE WATER > LAKES
TERRESTRIAL HYDROSPHERE > SURFACE WATER > WATER DEPTH > LAKE DEPTH
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > DISSOLVED GASES > DISSOLVED OXYGEN
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > LIGHT TRANSMISSION > PAR
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > OXYGEN
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > TURBIDITY
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER TEMPERATURE > LAKE TEMPERATURE
BIOSPHERE > AQUATIC ECOSYSTEMS > LAKES
BIOSPHERE > AQUATIC ECOSYSTEMS > MARINE HABITAT
ISO Topic Category
Phone: (608) 262-8955
Fax: (608) 262-0693
Email: bowser at geology.wisc.edu
Email: cbowser at LTERnet.edu
University of Wisconsin-Madison Department of Geology and Geophysics 1215 West Dayton Street
Province or State: WI
Postal Code: 53706
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
Bowser, C. J. 1986. "Historic data sets: Lessons from the past, lessons
for the future; Symposium, In W.K. Michener, ed. Research Data Management
in the Ecological Sciences, Univ. So. Carolina Press, pp. 155-179
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
Kratz, T. K.; Magnuson, J. J.; Frost, T. M.; Benson, B. J.; Carpenter,
S. R. 1994. "Landscape position, scaling, and the spatial and temporal
variability of ecological parameters: considerations for biological
monitoring", In S. L. Loeb and A. Spacie, eds., Biological Monitoring
of Freshwater Ecosystems: Interpretation and Efficacy to Assess
Environmental Quality, Societal Internationalis Limnologiae workshop,
Purdue University, November 29-December 1, 1990. In Press.
Magnuson, J. J.; Frost, T. M. 1982. "Trout Lake Station - a center for
north temperate lake studies". Bulletin of the Ecological Society of
America, Vol. 63, pp. 223-25.
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.; Beckel, A. L. 1983. "The invisible
present: Long-term ecological research on lakes", L&S Magazine,
College of Letters and Science, University of Wisconsin-Madison, 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. 533-5.
Magnuson, J. J.; Benson, B. J.; Kratz, T. K. 1990. "Temporal coherence
in the limnology of a suite of lakes in Wisconsin, U.S.A.", Freshwater
Biology, Vol 23, pp. 145-159.
Magnuson, J. J.; Bowser, C. J. 1990. "A network for long-term
ecological research in the United States", Freshwater Biology, Vol 23,
Magnuson, J. J.; Kratz, T. K.; Frost, T. M.; Bowser, C. J.; Benson, B.
J.; Nero, R. 1991. "Expanding the temporal and spatial scales of
ecological research and comparison of divergent ecosystems: roles for
LTER in the United States", In P.G. Risser, ed. Long-term Ecological
Research, J. Wiley, pp. 45-70.
See also: http://limnosun.limnology.wisc.edu/cgi-bin/bibliography.cgi
Creation and Review Dates
Last DIF Revision Date: 2004-02-09