Long-Term Ecological Research (LTER)/CDR006: Effects of NH4NO3 on Small Mammal Grids, Control (MAMML) at Cedar Creek Natural History AreaEntry ID: LTER_CDR006
Abstract: LTER - Long-Term Ecological Research Program/Cedar Creek Natural
History Area (CDR)
LTER/CDR006 [Summary adapted from the LTER Core Data Set Catalog]:
The purpose of this experiment was to measure herbivore effects over a
large area that had not been manipulated rather than the 4 m x 4 m
treatment I plots in CDR004 and CDR005. None of the plots in this
... experiment received any nutrients. Otherwise, the construction of
this experiment is identical to CDR004 and CDR005.
Proprietary limits: Investigators have priority over data for
five years, but are interested in collaboration for novel comparisons before
The Cedar Creek Natural History Area (CCNHA) is a 2200 hectare
experimental ecological reserve operated by the University of
Minnesota in cooperation with the Minnesota Academy of Sciences. CCNHA
is located in Anoka and Isanti Counties north of Minneapolis/St. Paul.
The site was established in 1940, was designated a National Natural
Landmark by the National Park Service in 1975. In 1977 it was included
as an Experimental Ecology Reserve in a proposed network, and in 1982
it was one of 11 sites in the U.S. selected by the National Science
Foundation for funding of LTER.
Information about LTER is also available at
(Click for Interactive Map)
Start Date: 1983-01-01
BIOSPHERE > TERRESTRIAL ECOSYSTEMS > FORESTS
BIOSPHERE > VEGETATION > FOREST COMPOSITION/VEGETATION STRUCTURE
BIOSPHERE > VEGETATION > NUTRIENTS
LAND SURFACE > SOILS > ORGANIC MATTER
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS
BIOSPHERE > TERRESTRIAL ECOSYSTEMS > WETLANDS > MARSHES
BIOSPHERE > AQUATIC ECOSYSTEMS > WETLANDS
BIOSPHERE > AQUATIC ECOSYSTEMS > WETLANDS > MARSHES
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SPECIES COMPETITION
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > POPULATION DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > PLANT SUCCESSION
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > GRAZING DYNAMICS / PLANT ECOLOGY
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOGEOCHEMICAL CYCLES
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > NUTRIENT CYCLING
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PRIMARY PRODUCTION
Quality The values provided in temporal and spatial coverage are approximate only.
Taken from the 2009-2010 Progress Report:
Variations to work plan or objectives:
The main focus of experiments were changed from fertilisation and larval development of invertebrates to calcification of juvenile echinoderms with existing skeleton under predicted ocean warming and acidification ... scenarios. This occurred because adults of S. neumayeri collected around Davis had already passed their spawning period by the time the aquarium field module was set-up and running. Eight trials on L. elliptica were conducted to see if they were a good substitute species, but all attempts were unsuccessful.
Initial collection of S. neumayeri were carried out around Davis station, mostly through snorkelling around Ellis Fjord. A. nimrodi were collected for us by the divers and were mostly taken from the mouth of Heidemann Bay. L. elliptica were also collected by the divers, however they were obtained from a variety of locations. Animals were collected as and when we needed them.
Animals were dissected no later than a couple of days after they were brought in by divers.
For experiments involving A. nimrodi, juveniles were collected from the brood pouch of the parent and separated into two classes (early and late) of juveniles. They were then photographed individually and placed into our treatments in batches of 10. Experiments were run for 4 weeks in order to see a stronger effect of ocean warming and acidification on calcification. After 4 weeks, juveniles were taken out and photographed again to document any changes, then they were preserved in trace amounts of 2.5% glutaraldehyde and returned to Australia for further analysis. A total of 2 trials were conducted.
For L. elliptica, animals were dissected and strip-spawned to obtain gametes. These gametes were fertilised under different sperm concentrations in order to discover the optimal sperm concentration needed for this species for a successful fertilisation. Eggs which were mixed with sperm were stored in controlled temperature cabinets for 48 hours to see if fertilisation had occurred. However, 8 trials were conducted and none were successful.
Difficulties affecting project:
There were initial difficulties with the setting-up of the field aquarium module as parts needed were not available. However, these have all been solved, and we do not expect it to interfere with the experimental design. However, further work involving A. nimrodi might not be possible for future seasons as these animals can only be collected through diving, and there might not be a dive team present on station for the following season.
Access Constraints See the child records for access to the data.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_3134 when using these data.
Data Set Progress
Distribution Media: FTP
Distribution Format: ASCII
Email: rothacher at gfz-potsdam.de
GeoForschungsZentrum Potsdam Telegrafen berg A17
Postal Code: 14473
Role: TECHNICAL CONTACT
Email: wickert at gfz-potsdam.de
GeoForschungsZentrum Potsdam Telegrafenberg
Postal Code: 14473
Role: DIF AUTHOR
Email: tschmidt at gfz-potsdam.de
GeoForschungsZentrum Potsdam Telegrafenberg A17
Postal Code: 14473
Creation and Review Dates
DIF Creation Date: 2007-03-30
Last DIF Revision Date: 2009-05-04