Data Package Metadata View Summary

Climate Change Across Seasons Experiment (CCASE) at the Hubbard Brook Experimental Forest: Net Nitrogen Mineralization via Buried Bags

General Information

Data Package:
Local Identifier:	knb-lter-hbr.262.1
Title:	Climate Change Across Seasons Experiment (CCASE) at the Hubbard Brook Experimental Forest: Net Nitrogen Mineralization via Buried Bags
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	Rates of net nitrogen mineralization were measured on all Climate Change Across Seasons Experiment (CCASE) plots. There are six plots total (each 11 x 14m). Two are warmed 5 degrees C throughout the growing season (Plots 3 and 4). Two others are warmed 5 degrees C in the growing season and have snow removed during winter to induce soil freezing and then warming cables turn on to create thaws; each soil freeze/thaw cycle includes 72-hours of soil freezing followed by 72-hours of thaw (Plots 5 and 6). Four kilometers (2.5 mi) of heating cable are buried in the soil to warm these four plots. Two additional plots serve as controls for our experiment (Plots 1 and 2). This data set includes net nitrogen mineralization data collected in the growing season of 2018. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Publication Date:	2020-06-19

Time Period

Begin:

2018-05-01

End:

2018-09-30

People and Organizations
Contact:	Hubbard Brook Ecosystem Study [ email ]
Creator:	Templer, Pamela (Boston University)
Creator:	Harrison, Jamie (Boston University)
Creator:	Sanders-DeMott, Rebecca (University of New Hampshire)
Creator:	Schultz, Kyle (Boston University)
Creator:	Blagden, Megan (Boston University)

Data Entities
Data Table Name:	CCASE mineralization data
Description:	CCASE mineralization data

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/262/1/b3982d2e704c7cdbd6e032ae68fbf97e
Name:	CCASE mineralization data
Description:	CCASE mineralization data
Number of Records:	96
Number of Columns:	9

Table Structure

Object Name:

CCASE_Mineralization_2018.csv

Size:

6269 bytes

Authentication:

47bda5a6d4a4f2cd5afa0c379a78b255 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

Site

Field_Timing

Incubation_Start_Date

Treatment

Plot

Quadrant

Net_Mineralization

Net_Nitrification

Net_Ammonification

Definition:

Site of experiment (Hubbard Brook Experimental Forest – HBEF)

Time of sample collection

First date of sample collection and start of the incubation period

Treatment type

An integer representing plot number

Quadrant of sample collection (1-4 in each plot)

Rate of net nitrogen mineralization; micrograms N per gram soil per day

Rate of net nitrification; micrograms N per gram soil per day

Rate of net ammonification; micrograms N per gram soil per day

Storage Type:

string

date

string

float

Measurement Type:

nominal

dateTime

nominal

ratio

Measurement Values Domain:

Definition

Site of experiment (Hubbard Brook Experimental Forest – HBEF)

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Early Growing Season
Definition	Early Growing Season
Source

Code Definition

Code	Mid Growing Season
Definition	Mid Growing Season
Source

Code Definition

Code	Late Growing Season
Definition	Late Growing Season
Source

Format	YYYY-MM-DD
Precision

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	warm_FTC
Definition	warmed in the growing season with soil freeze/thaw cycles in winter
Source

Code Definition

Code	reference
Definition	ambient soil temperatures
Source

Code Definition

Code	warming
Definition	warmed in the growing season
Source

Definition

An integer representing plot number

Definition

Quadrant of sample collection (1-4 in each plot)

Unit	microgramPerGramPerDay
Type	real
Min	-0.03
Max	5.78

Unit	microgramPerGramPerDay
Type	real
Min	-0.07
Max	0.07

Unit	microgramPerGramPerDay
Type	real
Min	-0.03
Max	5.8

Missing Value Code:

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data (\"Data User\" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available \"as is.\" The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
LTER Controlled Vocabulary	disturbance, primary production, ecosystems, forests, nitrogen mineralization, nitrogen cycling
HBES Vocabulary	soil warming, snow removal, HBR, Hubbard Brook LTER, Hubbard Brook Ecosystem Study, Hubbard Brook Experimental Forest, New Hampshire, Climate change across seasons experiment, CCASE, Acer rubrum
ISO 19115 Topic Category	biota, climatologyMeteorologyAtmosphere
National Research & Development Taxonomy	Ecology, Ecosystems, & Environment, Climate change, Climate change effects

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

Rates of net nitrogen mineralization and nitrification were measured in all six plots at CCASE using the buried bag technique (Eno 1960). We measured net nitrogen mineralization three times throughout the 2018 growing season (28 day incubations starting May 18, July 13, and September 25, 2018), each representing early, peak, and late growing season, respectively. It is difficult to use soil augers to collect cores in our plots due to the buried heating cables. Instead, we collected soils in each of the four quadrants in each plot (n=4 per plot; n=24 total) by measuring a 10 cm x 10 cm area on the soil surface and gently cutting around this area into the soil, including the organic layer only, which is on average 5.2 ± 0.30 cm depth, but can be as deep as 10 cm (Templer et al. 2017). We then cut the soil sample in half. Half of the sample was immediately placed in a cooler (representing the initial sample); the other half was left to incubate for 28 days in the field in a polyethylene zip-top bag (representing the final sample), placed back into hole and covered with soil. The bags allowed gas exchange (oxygen and carbon dioxide). Laboratory extractions were completed using 5 g of field-moist soil and 30 mL of 2 M KCl. The concentrations of ammonium and nitrate in soil extracts were analyzed colorimetrically for both the initial and final samples using a Versamax microplate spectrophotometer (Molecular Devicesl Doane and Horwáth 2003). Net ammonification was calculated as the difference in ammonium in the initial sample and the final sample, divided by the incubation period (28 days). Net nitrification was calculated as the difference in nitrate in the initial sample and the final sample, divided by the incubation period (28 days). Net N mineralization was calculated as the difference in the sum of ammonium and nitrate in the initial sample and the final sample, divided by the incubation period.

Eno C (1960) Nitrate production in the field by incubating the soil in polyethylene bags. Soil Sci Soc Am J 24:277–279

People and Organizations

Creators:

Individual:

Pamela Templer

Organization:

Boston University

Email Address:

ptempler@bu.edu

Id:

https://orcid.org/0000-0002-6570-3837

Individual:

Jamie Harrison

Organization:

Boston University

Email Address:

harrisoj@bu.edu

Id:

https://orcid.org/0000-0001-7937-0503

Individual:

Rebecca Sanders-DeMott

Organization:

University of New Hampshire

Email Address:

Rebecca.Sanders-DeMott@unh.eduailey@usda.gov

Id:

https://orcid.org/0000-0002-0709-8042

Individual:

Kyle Schultz

Organization:

Boston University

Email Address:

Schlutz4@bu.edu

Individual:

Megan Blagden

Organization:

Boston University

Email Address:

mblagden@bu.edu

Contacts:

Organization:

Hubbard Brook Ecosystem Study

Email Address:

hbr-im@lternet.edu

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2018-05-01

End:

2018-09-30

Geographic Region:

Description:

CCASE (Climate Change Across Seasons Experiment) plots located north of the Pierce Laboratory.

Bounding Coordinates:

Northern:	43.94688	Southern:	43.945197
Western:	-71.702662	Eastern:	-71.69936

Project

Parent Project Information:

Title:

Long Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest

Personnel:

Individual:

Gary Lovett

Organization:

Cary Institute of Ecosystem Studies

Email Address:

lovettg@caryinstitute.org

Id:

https://orcid.org/0000-0002-8411-8027

Role:

Principal Investigator

Funding:

National Science Foundation 1114804

Related Project:

Title:

Long Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest

Personnel:

Individual:

Gary Lovett

Organization:

Cary Institute of Ecosystem Studies

Email Address:

lovettg@caryinstitute.org

Id:

https://orcid.org/0000-0002-8411-8027

Role:

Principal Investigator

Funding:

National Science Foundation 1637685

Related Project:

Title:

Environmental Biology (DEB) CAREER: Role of Plant Nutrient Uptake in Forest Nutrient Retention and Carbon Sequestration: an Integrated Research, Teaching and Outreach Program

Personnel:

Individual:

Pamela Templer

Organization:

Boston University

Email Address:

ptempler@bu.edu

Id:

https://orcid.org/0000-0002-6570-3837

Role:

Principal Investigator

Funding:

National Science Foundation 1149929

Maintenance

Maintenance:

Description:	complete
Frequency:

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'microgramPerGramPerDay'
        |     |     |     |  \___attribute 'name' = 'microgramPerGramPerDay'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = ''
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'microgram per gram per day'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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Data Package Metadata View Summary

Climate Change Across Seasons Experiment (CCASE) at the Hubbard Brook Experimental Forest: Net Nitrogen Mineralization via Buried Bags

Data Entities

Data Table

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Climate Change Across Seasons Experiment (CCASE) at the Hubbard Brook Experimental Forest: Net Nitrogen Mineralization via Buried Bags

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Data Table

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These methods, instrumentation and/or protocols apply to all data in this dataset:

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+/- Project

Parent Project Information:

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+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata