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Long-Term Ecological Research (LTER)/CDR006: Effects of NH4NO3 on Small Mammal Grids, Control (MAMML) at Cedar Creek Natural History Area

Entry ID: LTER_CDR006

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Summary

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
...

Related URL

Link: GET DATA

Description: Access to Cedar Creek LTER datasets

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 45.0

S: 45.0

E: -93.0

W: -93.0

Temporal Coverage

Start Date: 1983-01-01

Location Keywords

CONTINENT > NORTH AMERICA

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MINNESOTA

Science Keywords

BIOSPHERE > TERRESTRIAL ECOSYSTEMS > FORESTS

BIOSPHERE > VEGETATION > FOREST COMPOSITION/VEGETATION STRUCTURE

ISO Topic Category

BIOTA

ENVIRONMENT

OCEANS

Platform

FIELD SURVEYS

LABORATORY

FIELD INVESTIGATION

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.

Field work:
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.

Laboratory activity/analysis:
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
(http://creativecommons.org/licenses/by/3.0/).

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.

Ancillary Keywords

Ocean acidification

Climate Change

Data Set Progress

COMPLETE

Data Center

Australian Antarctic Data Centre, Australia

Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC Phone: +61 3 6232 3244 Fax: +61 3 6232 3351 Email: metadata at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia

Distribution

Distribution Media: FTP

Distribution Format: ASCII

Fees: Free

Personnel

MARKUS ROTHACHER

Role: INVESTIGATOR

Phone: +49-331-288-1100

Fax: +49-331-288-1111

Email: rothacher at gfz-potsdam.de

Contact Address:

GeoForschungsZentrum Potsdam

Telegrafen berg A17

City: Potsdam

Postal Code: 14473

Country: GERMANY

JENS WICKERT

Role: TECHNICAL CONTACT

Phone: +49-331-288-1758

Fax: +49-331-288-1111

Email: wickert at gfz-potsdam.de

Contact Address:

GeoForschungsZentrum Potsdam

Telegrafenberg

City: Potsdam

Postal Code: 14473

Country: GERMANY

TORSTEN SCHMIDT

Role: DIF AUTHOR

Phone: +49-331288-1743

Fax: +49-331288-1759

Email: tschmidt at gfz-potsdam.de

Contact Address:

GeoForschungsZentrum Potsdam

Telegrafenberg A17

City: Potsdam

Postal Code: 14473

Country: GERMANY

Creation and Review Dates

DIF Creation Date: 2007-03-30

Last DIF Revision Date: 2009-05-04

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