Data Package Metadata View Summary

Hubbard Brook Experimental Forest: In-situ Nitrogen Mineralization and Nitrification measurements for 4 winter climate change projects

General Information

Data Package:
Local Identifier:	knb-lter-hbr.253.10
Title:	Hubbard Brook Experimental Forest: In-situ Nitrogen Mineralization and Nitrification measurements for 4 winter climate change projects
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	These data are from four separate projects undertaken between 1997 and 2017. The first of these are two snow manipulation (freeze) projects: 1) In 1997, as part of a study of the relationships between snow depth, soil freezing and nutrient cycling, we established eight 10 x 10-m plots located within four stands; two dominated (80%) by sugar maple (SM1 and SM2) and two dominated by yellow birch(YB1 and YB2), with one snow reduction (shoveling) and one reference plot in each stand. 2) In 2001, we established eight new 10-m x 10-m plots (4 treatment, 4 reference) in four new sites; two high elevation, north facing and (East Kineo and West Kineo) two low elevation, south facing (Upper Valley and Lower Valley) maple-beech-birch stands. To establish plots, we cleared minor amounts of understory vegetation from all (both treatment and reference) plots (to facilitate shoveling). Treatments (keeping plots snow free by shoveling through the end of January) were applied in the winters of 1997/98, 1998/99, 2002/2003 and 2003/2004. The Climate Gradient Project was established in October 2010. Here we evaluated relationships between snow depth, soil freezing and nutrient cycling along an elevation/aspect gradient that created variation in climate with little variation in soils or vegetation. We established 6 20 x 20-m plots (intensive plots) and 14 10 x 10-m plots (extensive plots), with eight of the plots facing north and twelve facing south. The Ice Storm project was designed to evaluate the damage and changes ice storms cause to northern hardwood forests in forest structure, nutrient cycling and carbon storage. Ten 20x30 meter plots were established in a predominately sugar maple stand, with 4 icing treatments and 2 control plots. The treatments are as follows: Low (0.25"), Mid (0.5"), Midx2 (0.5") 2 Years in a row, High: (0.75"), Control. The icing treatment was conducted in the winter of 2015-2016, with a second year of icing on the Midx2 treatments plots in the winter of 2016-2017. The treatments are as follows: Low (0.25"), Mid (0.5"), Midx2 (0.5") 2 Years in a row, High: (0.75"), Control.
Publication Date:	2021-03-04

Time Period

Begin:

1997-01-01

End:

2017-12-31

People and Organizations
Contact:	Hubbard Brook Ecosystem Study [ email ]
Creator:	Groffman, Peter M. (Cary Institute of Ecosystem Studies)
Creator:	Morse, Jennifer (Portland State University)
Creator:	Duran, Jorge (University of Coimbra, Portugal)
Creator:	Weitzman, Julie (City University of New York)
Creator:	Rustad, Lindsey (USDA Forest Service, Northern Research Station)
Associate:	Martel, Lisa (Cary Institute of Ecosystem Studies, Associatedparty)
Associate:	Wilson, Geoff (Cary Institute of Ecosystem Studies, Associatedparty)

Data Entities
Data Table Name:	HBEF_insitu_nmin_compilation
Description:	HBEF insitu N mineralization data from 4 studies

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/253/10/7402213852b4f7033671d17e8bdcab11
Name:	HBEF_insitu_nmin_compilation
Description:	HBEF insitu N mineralization data from 4 studies
Number of Records:	1540
Number of Columns:	17

Table Structure

Object Name:

HBEF_insitu_nmin_compilation.csv

Size:

154439 bytes

Authentication:

d052cf8793982dd44e183d16e73565c5 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:

Project_Name

Date_Planted

Date_Harvested

Treatment

Site

Sampling_Plot

Replicate

horizon

inc_time

Fresh_NO2_NO3

Fresh_NH4

Inc_NO2_NO3

Inc_NH4

Pot_Net_N_Min

Pot_Net_Nit

Fresh_pct_moisture

Inc_pct_moisture

Definition:

Study site description

Date that both the fresh and the incubated cores were sampled. The fresh core was taken to the lab for analysis on this day.

Date that the incubated core was pulled from the ground and taken to the lab for analysis

Plot treatment

Plot name. Climate Gradient Plots 'I' are 20 m x 20 m intensively instrumented, or 'E' 10 m x 10 m plots, and indicate elevation class as: L=low, H=high

Each site has multiple sub-plot designated for soil sampling

Replicate samples were taken on each sub-plot for the Ice storm project

Soil cores in Freeze 1 and 2, and Ice Storm were divided into mineral and organic horizons before lab analyses. Climate Gradient project the cores were homogenized over the entire soil profile before lab analyses.

Incubation time - the length of time between lab analysis of the “fresh” and the “incubated” cores

Nitrate/Nitrite N in Fresh core – micrograms N per gram dry soil

Ammonium N in Fresh core – micrograms N per gram dry soil

Nitrate/Nitrite N in incubated core - – micrograms N per gram dry soil

Ammonium N in incubated core -– micrograms N per gram dry soil

Potential net N Mineralization – microgram N per gram dry soil per day

Potential net N Nitrification – microgram N per gram dry soil per day

Moisture content of the fresh soil – gram water per gram wet soil

Moisture content of the incubated core – gram water per gram wet soil

Storage Type:

string

date

string

float

Measurement Type:

nominal

dateTime

nominal

ratio

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Freeze 1
Definition	Freeze 1 study 1997-2000
Source

Code Definition

Code	Freeze 2
Definition	Freeze 2 study 2000-2004
Source

Code Definition

Code	Control
Definition	Freeze study control plots
Source

Code Definition

Code	Clim_Grad
Definition	Climate Gradient study
Source

Code Definition

Code	Ice
Definition	Ice Storm Experiment (ISE)
Source

Format	YYYY-MM-DD
Precision

Format	YYYY-MM-DD
Precision

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Freeze
Definition	Plots shoveled to induce freezing in freeze experiments
Source

Code Definition

Code	Low Elevation
Definition	Low elevation climate gradient plot
Source

Code Definition

Code	High Elevation
Definition	High elevation climate gradient plot
Source

Code Definition

Code	Low
Definition	Low ice storm treatment: 0.25” ice
Source

Code Definition

Code	Mid
Definition	Mid ice storm treament: 0.5” ice
Source

Code Definition

Code	High
Definition	High ice storm treatment: 0.75” ice
Source

Code Definition

Code	Midx2
Definition	Midx2 ice storm treatment 0.5" on 2 consecutive years
Source

Definition

Plot name. Climate Gradient Plots 'I' are 20 m x 20 m intensively instrumented, or 'E' 10 m x 10 m plots, and indicate elevation class as: L=low, H=high

Definition

Each site has multiple sub-plot designated for soil sampling

Definition

Replicate samples were taken on each sub-plot for the Ice storm project

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	org
Definition	org = Oi/Oe/Oa
Source

Code Definition

Code	min
Definition	min = A/B
Source

Unit	number
Type	natural
Min	8
Max	177

Unit	microgramPerGram
Type	real
Min	-68.73
Max	82.67

Unit	microgramPerGram
Type	real
Min	-980.85
Max	345.15

Unit	microgramPerGram
Type	real
Min	-0.52
Max	324.04

Unit	microgramPerGram
Type	real
Min	0
Max	1389.36

Unit	microgramPerGramPerDay
Type	real
Min	-10.14
Max	42.96

Unit	microgramPerGramPerDay
Type	real
Min	-1.12
Max	4.82

Unit	gramPerGram
Type	real
Min	0.13
Max	1.03

Unit	gramPerGram
Type	real
Min	0.02
Max	0.85

Missing Value Code:

Code	-9999.99
Expl	no data available

Code	-9999.99
Expl	no data available

Code	-9999.99
Expl	no data available

Code	-9999.99
Expl	no data available

Code	-9999.99
Expl	no data available

Code	-9999.99
Expl	no data available

Code	-9999.99
Expl	no data available

Code	-9999.99
Expl	no data available

Code	-9999.99
Expl	no data available

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	ecosystems, forests, watersheds, ammonium, biogeochemical processes, ice, inorganic nitrogen, nitrate, nitrification, nitrogen mineralization, snow
LTER Core Research Area	disturbance
HBES Vocabulary	HBR, Hubbard Brook LTER, Hubbard Brook Experimental Forest, Hubbard Brook Ecosystem Study, HBES, HBEF, New Hampshire, NH, White Mountain National Forest
ISO 19115 Topic Category	climatologyMeteorologyAtmosphere
National Research & Development Taxonomy	Climate change, Climate change effects, Ecology, Ecosystems, & Environment

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:

SAMPLING DESIGN

In situ net nitrogen (N) mineralization and nitrification rates were measured in the two snow manipulation (freeze) studies using the covered cylinder method. In this method a pair of 2 cm diameter cores, approximately 15 cm in length cores are taken in a PVC cylinder. A stopper is placed at the bottom and the top of the core. One core is returned to the hole. The second core is returned to the laboratory, removed from the liner, and split into organic and mineral horizons. These samples are then extracted with 2N KCl and analyzed for ammonium (NH₄ ⁺ and NO₃ ^-). The second core is pulled from the ground after the desired incubation period and split, extracted and analyzed in the same way.

In situ net nitrogen (N) mineralization and nitrification rates in the Climate Gradient and Ice Storm studies were measuredusing the buried bag method. Here, 2 cores are taken with a 5 cm diameter split PVC soil sampler. The soil is removed from the split PVC, placed in a zip-top bag, rolled, and taped so that the core remains intact. The first core is returned immediately to the lab, split into organic and mineral horizons (only for the Ice Storm Project), extracted, and analyzed for NH₄ ⁺ and NO₃ ^-. The second is returned to the ground, incubated for the desired amount of time and then returned to the lab, split into horizons, extracted, and analyzed. Inorganic N was measured colorometerically using a Lachat QuikChem8100 autoanalyser. Potential net N mineralization and nitrification were quantified from the accumulation of NH₄+ plus NO₃- and NO₃- alone over the incubation period.

LABORATORY PROCEDURES

All samples were held at field moisture before analysis. Soil water content was determined gravimetrically.

CALCULATIONS

All results are expressed on a per gram of dry soil basis. Values can be converted to a “per area” basis using data on the mass of different soil horizons found elsewhere on the data page of this website.

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@environmentaldatainitiative.org

Web Address:

https://environmentaldatainitiative.org

Creators:

Individual:	Peter M. Groffman
Organization:	Cary Institute of Ecosystem Studies

Individual:

Jennifer Morse

Organization:

Portland State University

Email Address:

jlmorse@pdx.edu

Id:

https://orcid.org/0000-0001-8872-4940

Individual:	Jorge Duran
Organization:	University of Coimbra, Portugal

Individual:

Julie Weitzman

Organization:

City University of New York

Email Address:

julie.weitzman@gc.cuny.edu

Id:

https://orcid.org/0000-0002-6554-4776

Individual:

Lindsey Rustad

Organization:

USDA Forest Service, Northern Research Station

Email Address:

lindsey.rustad@usda.gov

Id:

https://orcid.org/0000-0002-6683-2374

Contacts:

Organization:

Hubbard Brook Ecosystem Study

Email Address:

hbr-im@lternet.edu

Associated Parties:

Individual:	Lisa Martel
Organization:	Cary Institute of Ecosystem Studies
Id:	https://orcid.org/0000-0002-0156-4954
Role:	Associatedparty

Individual:

Geoff Wilson

Organization:

Cary Institute of Ecosystem Studies

Email Address:

wilsong@caryinstitute.org

Role:

Associatedparty

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

1997-01-01

End:

2017-12-31

Geographic Region:

Description:

Hubbard Brook Experimental Forest

Bounding Coordinates:

Northern:	43.959	Southern:	43.914
Western:	-71.8062	Eastern:	-71.7022

Sampling Site:

Description:

IL1: Climate/Snow Gradient Study, Intensive Low Elevation Plot 1. Aspect: South

Site Coordinates:

Longitude (degree):

-71.71479424

Latitude (degree):

43.94617659

Sampling Site:

Description:

IL2: Climate/Snow Gradient Study, Intensive Low Elevation Plot 2. Aspect: South

Site Coordinates:

Longitude (degree):

-71.72060047

Latitude (degree):

43.94807308

Sampling Site:

Description:

IL3: Climate/Snow Gradient Study, Intensive Low Elevation Plot 3. Aspect: South

Site Coordinates:

Longitude (degree):

-71.73064174

Latitude (degree):

43.95019236

Sampling Site:

Description:

IH1: Climate/Snow Gradient Study, Intensive High Elevation Plot 1. Aspect: North

Site Coordinates:

Longitude (degree):

-71.7684914

Latitude (degree):

43.93415543

Sampling Site:

Description:

IH2: Climate/Snow Gradient Study, Intensive High Elevation Plot 2. Aspect: North

Site Coordinates:

Longitude (degree):

-71.76717913

Latitude (degree):

43.93218854

Sampling Site:

Description:

IH3: Climate/Snow Gradient Study, Intensive High Elevation Plot 3. Aspect: North

Site Coordinates:

Longitude (degree):

-71.76180633

Latitude (degree):

43.93077007

Sampling Site:

Description:

E1: Climate/Snow Gradient Study, Extensive Plot 1. Aspect: North

Site Coordinates:

Longitude (degree):

-71.77291084

Latitude (degree):

43.92738579

Sampling Site:

Description:

E2: Climate/Snow Gradient Study, Extensive Plot 2. Aspect: North

Site Coordinates:

Longitude (degree):

-71.77643367

Latitude (degree):

43.92305067

Sampling Site:

Description:

E3: Climate/Snow Gradient Study, Extensive Plot 3. Aspect: North

Site Coordinates:

Longitude (degree):

-71.77745584

Latitude (degree):

43.91985666

Sampling Site:

Description:

E4: Climate/Snow Gradient Study, Extensive Plot 4. Aspect: North

Site Coordinates:

Longitude (degree):

-71.76570567

Latitude (degree):

43.92674122

Sampling Site:

Description:

E5: Climate/Snow Gradient Study, Extensive Plot 5. Aspect: North

Site Coordinates:

Longitude (degree):

-71.76463237

Latitude (degree):

43.92213059

Sampling Site:

Description:

E6: Climate/Snow Gradient Study, Extensive Plot 6. Aspect: North

Site Coordinates:

Longitude (degree):

-71.72151804

Latitude (degree):

43.95368099

Sampling Site:

Description:

E7: Climate/Snow Gradient Study, Extensive Plot 7. Aspect: South

Site Coordinates:

Longitude (degree):

-71.71862125

Latitude (degree):

43.95490408

Sampling Site:

Description:

E8: Climate/Snow Gradient Study, Extensive Plot 8. Aspect: South

Site Coordinates:

Longitude (degree):

-71.71984434

Latitude (degree):

43.95885229

Sampling Site:

Description:

E9: Climate/Snow Gradient Study, Extensive Plot 9. Aspect: South

Site Coordinates:

Longitude (degree):

-71.72161276

Latitude (degree):

43.96068944

Sampling Site:

Description:

E10: Climate/Snow Gradient Study, Extensive Plot 10. Aspect: South

Site Coordinates:

Longitude (degree):

-71.72874928

Latitude (degree):

43.95810127

Sampling Site:

Description:

E11: Climate/Snow Gradient Study, Extensive Plot 11. Abandonded in Fall 2011 and replaced with 11-B. Aspect: South

Site Coordinates:

Longitude (degree):

-71.74407265

Latitude (degree):

43.95310239

Sampling Site:

Description:

E11-B: Climate/Snow Gradient Study, Extensive Plot 11-B. Replacement for E11 started in Fall 2011. Aspect: South

Site Coordinates:

Longitude (degree):

-71.74247222

Latitude (degree):

43.95552778

Sampling Site:

Description:

E12: Climate/Snow Gradient Study, Extensive Plot 12. Aspect: South

Site Coordinates:

Longitude (degree):

-71.74066667

Latitude (degree):

43.95311111

Sampling Site:

Description:

E13: Climate/Snow Gradient Study, Extensive Plot 13. Aspect: South

Site Coordinates:

Longitude (degree):

-71.73857446

Latitude (degree):

43.95061447

Sampling Site:

Description:

E14: Climate/Snow Gradient Study, Extensive Plot 14. Aspect: South

Site Coordinates:

Longitude (degree):

-71.72587194

Latitude (degree):

43.95220301

Sampling Site:

Description:

SM1 Freeze1 Study

Site Coordinates:

Longitude (degree):

-71.741392

Latitude (degree):

43.950408

Sampling Site:

Description:

SM2 Freeze1 Study

Site Coordinates:

Longitude (degree):

-71.747275

Latitude (degree):

43.939433

Sampling Site:

Description:

YB1 Freeze1 Study

Site Coordinates:

Longitude (degree):

-71.735058

Latitude (degree):

43.936356

Sampling Site:

Description:

YB2 Freeze1 Study

Site Coordinates:

Longitude (degree):

-71.746986

Latitude (degree):

43.928469

Sampling Site:

Description:

UV Freeze2 Study

Site Coordinates:

Longitude (degree):

-71.717232

Latitude (degree):

43.94986

Sampling Site:

Description:

LV Freeze2 Study

Site Coordinates:

Longitude (degree):

-71.717155

Latitude (degree):

43.948059

Sampling Site:

Description:

EKC Freeze2 Study control plot

Site Coordinates:

Longitude (degree):

-71.776767

Latitude (degree):

43.918804

Sampling Site:

Description:

EKF Freeze2 Study treatment plot

Site Coordinates:

Longitude (degree):

-71.776418

Latitude (degree):

43.918906

Sampling Site:

Description:

WKF Freeze2 Study treatment plot

Site Coordinates:

Longitude (degree):

-71.777448

Latitude (degree):

43.919835

Sampling Site:

Description:

WKC Freeze2 Study control plot

Site Coordinates:

Longitude (degree):

-71.777726

Latitude (degree):

43.919584

Project

Parent Project Information:

Title:

Long-term Ecological Research (LTER) at the Hubbard Brook Experimental Forest (1992)

Personnel:

Individual:

Timothy Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 9211768

Related Project:

Title:

LTER: Hubbard Brook Experimental Forest (1998)

Personnel:

Individual:

Timothy Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 9810221

Related Project:

Title:

Long-Term Ecological Research (LTER) at Hubbard Brook Experimental Forest (HBR-LTER) (2005)

Personnel:

Individual:

Timothy Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 0423259

Related Project:

Title:

Long-Term Ecological Research at Hubbard Brook Experimental Forest (2010)

Personnel:

Individual:

Timothy Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 1114804

Related Project:

Title:

LTER: Long Term Ecological Research at the Hubbard Brook Experimental Forest (2016)

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 (NSF) 1637685

Maintenance

Maintenance:

Description:	complete
Frequency:

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'microgramPerGram'
        |     |     |     |  \___attribute 'name' = 'microgramPerGram'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = ''
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'microgramPerGram'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'microgramPerGramPerDay'
        |     |     |     |  \___attribute 'name' = 'microgramPerGramPerDay'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = ''
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'microgramPerGramPerDay'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'gramPerGram'
        |     |     |     |  \___attribute 'name' = 'gramPerGram'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = ''
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'gramPerGram'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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Data Package Metadata View Summary

Hubbard Brook Experimental Forest: In-situ Nitrogen Mineralization and Nitrification measurements for 4 winter climate change projects

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

Hubbard Brook Experimental Forest: In-situ Nitrogen Mineralization and Nitrification measurements for 4 winter climate change projects

+/- 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

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata