Data Package Metadata View Summary

Coarse Woody Debris of the Ice Storm Experiment (ISE) plots at the Hubbard Brook Experimental Forest

General Information

Data Package:
Local Identifier:	knb-lter-hbr.266.1
Title:	Coarse Woody Debris of the Ice Storm Experiment (ISE) plots at the Hubbard Brook Experimental Forest
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	The ice storm experiment was a novel experimental approach creating a suite of ice storms in a mature hardwood forest in New Hampshire, USA. The experiment included five ice storm intensities (0, 6.4, 12.7, and 19.1 mm radial ice accretion) applied in a single year, and one ice storm intensity (12.7 mm) applied in two consecutive years. This dataset quantifies the coarse woody debris transferred from the forest canopy to the soil under the different icing conditions. In this forest, little damage occurred below 6.4 mm radial ice accretion, moderate damage occurred with up to 12.7 mm of accretion, and significant branch breakage and canopy damage occurred with 19.1 mm of ice. The icing in consecutive years demonstrated an interactive effect of ice storm frequency and severity such that some branches damaged in the first year of icing appeared to remain in the canopy and then fall to the ground in the second year of icing. These results have implications for National Weather Service ice storm warning levels, and they provide a quantitative assessment of ice-load related inputs of forest debris that will be useful to municipalities creating response plans for current and future ice storms. 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:	2020-06-20

Time Period

Begin:

2015-11-24

End:

2017-11-09

People and Organizations
Contact:	Hubbard Brook Ecosystem Study [ email ]
Creator:	Rustad, Lindsey (USDA Forest Service, Northern Research Station)
Creator:	Campbell, John (USDA Forest Service, Northern Research Station)
Associate:	Leuenberger, Wendy M (SUNY College of Environmental Science and Forestry, Data Management)

Data Entities
Data Table Name:	ISE CWD data
Description:	Ise Storm Experiment (ISE) Coarse Woody Debris data

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/266/1/e3ae96637baa9d0b8d76cb9e21e864d2
Name:	ISE CWD data
Description:	Ise Storm Experiment (ISE) Coarse Woody Debris data
Number of Records:	634
Number of Columns:	11

Table Structure

Object Name:

HBEF_ISE_CWD_carbon.csv

Size:

37398 bytes

Authentication:

a47ccb54e8879b21151ae4cfd6e86aa1 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:

Year

Month

YR_M

Plot

Subplot

Size_Class

Decay_Class

Total_OD

gperm2

C_g_m2

ice

Definition:

Year that the measurements were taken

Month that the measurements were taken

Combination of the Year and Month that measures were taken

Plot number

Subplot number; A positive number representing an individual subplot of a plot.

Size of CWD that was collected

Decay class of CWD that was collected

Total ovendried weight of CWD from the sample. See methods for handling of large debris samples. the overdried weight of the entire sample.

The grams per square meter of ovendried CWD in the plots.

The grams per square meter of carbon in the plots. Calculated as %C × gperm2

Ice storm treatment

Storage Type:

date

string

float

string

Measurement Type:

dateTime

nominal

ratio

nominal

Measurement Values Domain:

Format	YYYY
Precision

Definition

Month that the measurements were taken

Definition

Combination of the Year and Month that measures were taken

Definition

Plot number

Definition

Subplot number; A positive number representing an individual subplot of a plot.

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	> 12.5 cm
Definition	greater than 12.5cm
Source

Code Definition

Code	2 – 12.5 cm
Definition	2-12.5cm
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	Sound
Source

Code Definition

Code	2
Definition	Sapwood somewhat decayed
Source

Code Definition

Code	3
Definition	Sapwood decayed, log supports its own weight
Source

Code Definition

Code	4
Definition	Heartwood rotten, does not support weight, shape maintained
Source

Code Definition

Code	5
Definition	No structural integrity, does not maintain shape
Source

Unit	gram
Type	real
Min	0
Max	38085.06

Unit	gramPerMeterSquared
Type	real
Min	0
Max	9521.265

Unit	gramPerMeterSquared
Type	real
Min	0.0219396475
Max	4635.45241894464

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Control
Definition	0 mm ice
Source

Code Definition

Code	Low
Definition	6.4 mm ice
Source

Code Definition

Code	Mid
Definition	12.7 mm ice
Source

Code Definition

Code	Midx2
Definition	12.7 mm ice two years in a row
Source

Code Definition

Code	High
Definition	19.1 mm ice
Source

Missing Value Code:

Code	NA
Expl	data not available

Code	NA
Expl	data not available

Code	NA
Expl	data not 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:
HBES Vocabulary	HBR LTER, Hubbard Brook Ecosystem Study, Hubbard Brook Experimental Forest, New Hampshire, Ice Storm Experiment ISE, forest canopy, ice storm, ice damage, forest structure
LTER Controlled Vocabulary	disturbance, ecosystems

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:

Coarse woody debris (CWD) ≥2 cm diameter was measured on a 2m×2m quadrat located within each of the three subplots designated for destructive measurements on each of the main plots (Figure 1c). On November 16, 2015, prior to icing, all CWD was collected from these quadrats. Post-treatment CWD was collected in July and November of 2016 and 2017. Downed branches that crossed quadrat boundaries were cut on the border with a hand saw. Coarse woody debris was sorted into 5 decay classes as described in Table 2 (after Waddell 2002). The wet weight of CWD for all categories was measured in the field for each quadrat. A subsample comprised of approximately twenty percent of the total wet weight of CWD for each category was brought back to the laboratory and oven-dried at 60 °C to a constant weight to obtain oven dry mass and a moisture correction factor. Litter was ground through a Wiley Mill® #40 mesh sieve, and analyzed for total C on a Thermo Flash® EA 1112 Series NC Analyzer® at the Louis C. Wyman Forest Sciences Laboratory, Durham, NH. Total mass of CWD C was calculated as total mass multiplied by C concentration.

Linear mixed effect models were used to analyze CWD carbon mass. CWD carbon mass was the response variable; explanatory variables included treatment, sampling period and treatment × sampling period. Plot was incorporated as a random effect. An α of 0.05 was used to compare treatments and sampling periods. Cumulative link mixed models were used to assess decay class as an ordered, categorical variable (Christensen 2019). CWD mass was used as weights in the decay class models. Differences among treatments were calculated in each sampling period, using treatment as a fixed effect and plot as a random effect. Decay classes from the July 2016 and 2017 samples were compared for Mid×2 plots. Weighted means of decay classes are presented as numbers to illustrate differences among treatments.

We sampled every subplot in every collection. Some did not have any CWD collected in some time periods. We added rows for these datasets with 0’s for gperm2, and filled in the YR_M, Plot, and Subplot columns. There are NA’s in all other columns for these added rows.

People and Organizations

Creators:

Individual:

Lindsey Rustad

Organization:

USDA Forest Service, Northern Research Station

Email Address:

lindsey.rustad@usda.gov

Individual:

John Campbell

Organization:

USDA Forest Service, Northern Research Station

Email Address:

john.campbell2@usda.gov

Id:

https://orcid.org/0000-0003-4956-1696

Contacts:

Organization:

Hubbard Brook Ecosystem Study

Email Address:

hbr_im@lternet.edu

Associated Parties:

Individual:

Wendy M Leuenberger

Organization:

SUNY College of Environmental Science and Forestry

Email Address:

leuenbe9@msu.edu

Id:

https://orcid.org/0000-0001-6567-9913

Role:

Data Management

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

2015-11-24

End:

2017-11-09

Geographic Region:

Description:

The Ice Storm Experiment plots located at Hubbard Brook Experimental Forest

Bounding Coordinates:

Northern:	43.9362	Southern:	43.935
Western:	-71.7592	Eastern:	-71.7557

Project

Parent Project Information:

Title:

Collaborative Research: Understanding the Impacts of Ice Storms on Forest Ecosystems of the Northeastern United States

Personnel:

Individual:

Charles Driscoll

Organization:

Syracuse University

Email Address:

ctdrisco@syr.edu

Id:

https://orcid.org/0000-0003-2692-2890

Role:

Principal Investigator

Funding:

NSF 1457675

Maintenance

Maintenance:

Description:	ongoing
Frequency:

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'gramPerMeterSquared'
        |     |     |     |  \___attribute 'name' = 'gramPerMeterSquared'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = ''
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'gram per meter squared'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

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Data Package Metadata View Summary

Coarse Woody Debris of the Ice Storm Experiment (ISE) plots at the Hubbard Brook Experimental Forest

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

Coarse Woody Debris of the Ice Storm Experiment (ISE) plots at the Hubbard Brook Experimental Forest

+/- 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