Raw Diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar
This data set contains diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar. Three well-preserved cores were collected in March 2003 with a gasoline-powered permafrost corer. Cores were stored frozen and sampled using a radial saw. The...
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Format: | Dataset |
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Bonanza Creek LTERBoreal Ecology Cooperative Research Unit University of Alaska FairbanksP.O. Box 756780 FairbanksAK99775USA907-474-6364907-474-6251
2005
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Subjects: | |
Online Access: | http://hdl.handle.net/10255/dryad.18171 http://metacat.lternet.edu/knb/metacat/knb-lter-bnz.188.8/xml |
id |
ftdryad:oai:v1.datadryad.org:10255/dryad.18171 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
moat diatoms fires macrofossil bog density carbon nitrogen soil samples charcoal |
spellingShingle |
moat diatoms fires macrofossil bog density carbon nitrogen soil samples charcoal Raw Diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar |
topic_facet |
moat diatoms fires macrofossil bog density carbon nitrogen soil samples charcoal |
description |
This data set contains diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar. Three well-preserved cores were collected in March 2003 with a gasoline-powered permafrost corer. Cores were stored frozen and sampled using a radial saw. The cores were sampled every two cm for macrofossil, diatom analysis and chemistry. Diatoms have been shown to be a useful indicator of peatland succession, local hydrology, and fire disturbance (Kienel et al., 1999, Moser et al., 2000, Rühland et al., 2000). Diatoms are more sensitive to changes in water levels than the commonly used peat indicators such as pollen and macrofossil analysis (Rühland et al., 2000). In this study, we employed diatom analysis to indicate shifts in water chemistry and to ascertain the response of this ecosystem to disturbance. To survey the diatom community, we processed three cores sampled every 2 cm by depth from the bog, moat and burn using methods described by the Paleoecological Environmental Assessment and Research Laboratory (PEARL) at Queen’s University and personal communications (Kathleen Rühland and John P. Smol). We digested the dried material, consisting of organic matter with varying amounts of sediment, in Kjeldahl digestion tubes in a heating block. We used 50:50 solution by molecular weight of concentrated H2SO4 and HNO3 and digested for 3 days at 95?C or until the disappearance of all organic matter. We diluted the resulting solution with deionized water to a neutral pH. We mounted the samples using the Pleurax high refractive index mounting medium (prepared by W. Dailey, University of Pennsylvania). To determine the prevalence of the different diatoms, we counted 400 valves (or for one sparse sample, four slides) for each sample. We identified samples according to Foged (1981), Krammer and Lange-Bertalot (1991) and personal communications with K. Rühland. We measured bulk density, %C and %N for all soil samples. We oven-dried at 50 - 65°C and ground all samples before analysis. We analyzed samples for %C and %N using a Carlo Erba EA1108 CHNS analyzer (CE Instruments, Milan, Italy) and a COSTECH ECS 4010 CHNS-O analyzer (Costech Analytical Technologies Inc., Valencia, CA,USA). Sample standard errors were ± 0.01% for nitrogen, ± 0.45% for carbon. To indicate fire events in the surrounding ecosystem, charcoal layers in the cores were quantified. We estimated charcoal by emptying dried samples of a known volume and depth (on mean 4.5 cm3) over a 10 cm x 10 cm grid and counting macroscopic charcoal fragments (greater than 0.05 mm in diameter) in each cm grid cell. |
author2 |
F.S.Chapin JenniferHarden A.McGuire |
format |
Dataset |
title |
Raw Diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar |
title_short |
Raw Diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar |
title_full |
Raw Diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar |
title_fullStr |
Raw Diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar |
title_full_unstemmed |
Raw Diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar |
title_sort |
raw diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the bbc collapse scar |
publisher |
Bonanza Creek LTERBoreal Ecology Cooperative Research Unit University of Alaska FairbanksP.O. Box 756780 FairbanksAK99775USA907-474-6364907-474-6251 |
publishDate |
2005 |
url |
http://hdl.handle.net/10255/dryad.18171 http://metacat.lternet.edu/knb/metacat/knb-lter-bnz.188.8/xml |
op_coverage |
The BBC collapse scar is located in Interior Alaska, USA, adjacent to the Bonanza Creek LTER on the south side of the Tanana River, approximately half way between Fairbanks and Nenana. The scar is located 0.5 km south of the river bank in a low lying black spruce tussock dominated wetland that was burned in June-July 2001 by the Survey Line fire. -148.3334833 W -148.3334833 E 64.6408 N 64.6408 S 2003-03-01 to 2003-03-29 2003-03-01 to 2003-03-29 |
long_lat |
ENVELOPE(-119.820,-119.820,55.917,55.917) ENVELOPE(-116.836,-116.836,55.617,55.617) ENVELOPE(-62.317,-62.317,-64.850,-64.850) |
geographic |
Bonanza Fairbanks Kathleen Moser |
geographic_facet |
Bonanza Fairbanks Kathleen Moser |
genre |
permafrost Alaska |
genre_facet |
permafrost Alaska |
op_relation |
http://metacat.lternet.edu/knb/metacat/knb-lter-bnz.188.8/xml knb-lter-bnz.188.8 http://hdl.handle.net/10255/dryad.18171 |
op_rights |
Access to Data While metadata will be freely available to those requesting it, the data manager will assure that any restrictions on access to data sets in the database will be enforced. Data will not be released without proper permission first being obtained from the investigator who generated the data. Use of data Researchers should receive adequate acknowledgment for the use of their data by others and should be provided with copies of publications using their data. Users of data from the data base must be aware that data is not to be sold or redistributed.Citing Bonanza Creek LTER DatasetsIt is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. |
_version_ |
1766167036481765376 |
spelling |
ftdryad:oai:v1.datadryad.org:10255/dryad.18171 2023-05-15T17:58:25+02:00 Raw Diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar F.S.Chapin JenniferHarden A.McGuire The BBC collapse scar is located in Interior Alaska, USA, adjacent to the Bonanza Creek LTER on the south side of the Tanana River, approximately half way between Fairbanks and Nenana. The scar is located 0.5 km south of the river bank in a low lying black spruce tussock dominated wetland that was burned in June-July 2001 by the Survey Line fire. -148.3334833 W -148.3334833 E 64.6408 N 64.6408 S 2003-03-01 to 2003-03-29 2003-03-01 to 2003-03-29 2005-11-12 text/plain http://hdl.handle.net/10255/dryad.18171 http://metacat.lternet.edu/knb/metacat/knb-lter-bnz.188.8/xml unknown Bonanza Creek LTERBoreal Ecology Cooperative Research Unit University of Alaska FairbanksP.O. Box 756780 FairbanksAK99775USA907-474-6364907-474-6251 http://metacat.lternet.edu/knb/metacat/knb-lter-bnz.188.8/xml knb-lter-bnz.188.8 http://hdl.handle.net/10255/dryad.18171 Access to Data While metadata will be freely available to those requesting it, the data manager will assure that any restrictions on access to data sets in the database will be enforced. Data will not be released without proper permission first being obtained from the investigator who generated the data. Use of data Researchers should receive adequate acknowledgment for the use of their data by others and should be provided with copies of publications using their data. Users of data from the data base must be aware that data is not to be sold or redistributed.Citing Bonanza Creek LTER DatasetsIt is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. moat diatoms fires macrofossil bog density carbon nitrogen soil samples charcoal dataset 2005 ftdryad 2020-01-01T14:38:17Z This data set contains diatom assemblages for 3 cores from the center, moat and surrounding burn (0, 12, and 30 m) of the BBC collapse scar. Three well-preserved cores were collected in March 2003 with a gasoline-powered permafrost corer. Cores were stored frozen and sampled using a radial saw. The cores were sampled every two cm for macrofossil, diatom analysis and chemistry. Diatoms have been shown to be a useful indicator of peatland succession, local hydrology, and fire disturbance (Kienel et al., 1999, Moser et al., 2000, Rühland et al., 2000). Diatoms are more sensitive to changes in water levels than the commonly used peat indicators such as pollen and macrofossil analysis (Rühland et al., 2000). In this study, we employed diatom analysis to indicate shifts in water chemistry and to ascertain the response of this ecosystem to disturbance. To survey the diatom community, we processed three cores sampled every 2 cm by depth from the bog, moat and burn using methods described by the Paleoecological Environmental Assessment and Research Laboratory (PEARL) at Queen’s University and personal communications (Kathleen Rühland and John P. Smol). We digested the dried material, consisting of organic matter with varying amounts of sediment, in Kjeldahl digestion tubes in a heating block. We used 50:50 solution by molecular weight of concentrated H2SO4 and HNO3 and digested for 3 days at 95?C or until the disappearance of all organic matter. We diluted the resulting solution with deionized water to a neutral pH. We mounted the samples using the Pleurax high refractive index mounting medium (prepared by W. Dailey, University of Pennsylvania). To determine the prevalence of the different diatoms, we counted 400 valves (or for one sparse sample, four slides) for each sample. We identified samples according to Foged (1981), Krammer and Lange-Bertalot (1991) and personal communications with K. Rühland. We measured bulk density, %C and %N for all soil samples. We oven-dried at 50 - 65°C and ground all samples before analysis. We analyzed samples for %C and %N using a Carlo Erba EA1108 CHNS analyzer (CE Instruments, Milan, Italy) and a COSTECH ECS 4010 CHNS-O analyzer (Costech Analytical Technologies Inc., Valencia, CA,USA). Sample standard errors were ± 0.01% for nitrogen, ± 0.45% for carbon. To indicate fire events in the surrounding ecosystem, charcoal layers in the cores were quantified. We estimated charcoal by emptying dried samples of a known volume and depth (on mean 4.5 cm3) over a 10 cm x 10 cm grid and counting macroscopic charcoal fragments (greater than 0.05 mm in diameter) in each cm grid cell. Dataset permafrost Alaska Dryad Digital Repository (Duke University) Bonanza ENVELOPE(-119.820,-119.820,55.917,55.917) Fairbanks Kathleen ENVELOPE(-116.836,-116.836,55.617,55.617) Moser ENVELOPE(-62.317,-62.317,-64.850,-64.850) |