Data Package Metadata View Summary

Plant Density at Permanent Quad Locations on the Jornada Experimental Range, 1915-2006

General Information

Data Package:
Local Identifier:	knb-lter-jrn.210351002.48
Title:	Plant Density at Permanent Quad Locations on the Jornada Experimental Range, 1915-2006
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	Between 1915 and 1932, more than 100 1 m2 quadrats were established across the Jornada Experimental Range to document vegetation dynamics in the dominant grass species over time. Locations of annual grasses, forbs, and subshrubs were charted (this package) and basal area of perennial grasses and area of shrubs were charted (packages 210351001). In several cases, grasses were also measured as a point and are found in the density data, particularly if they could not be identified to species.Thirty-four quadrats were established in 1915, 8 in 1916, 14 in 1919, 3 in 1921, 2 in 1924, 17 in 1926, 21 in 1927, 2 in 1929, 1 in 1931, and 2 in 1932. Data was recorded as chart quadrat maps, in which the locations and shapes of all living plants located within the quadrat were mapped onto the data sheet. From 1915-1924 mapping was done by dividing the quadrat frame into a decimeter grid using straps and reproducing locations of plants on grid paper. From 1925-2016 mapping was done using a pantograph, a device which allows for more accurate mapping of size and location of plants (Hill, 1920). In general, perennial grasses were mapped as polygons representing the boundary of each individual grass bunch at a point 1 inch above the soil surface (i.e. basal area) and shrubs were mapped as polygons representing the canopy cover of each individual.
Publication Date:	2019-06-24

Time Period

Begin:

1915

End:

2006

People and Organizations
Contact:	Maurer, Greg [ email ]
Creator:	Chapline, William
Associate:	Bestelmeyer, Brandon (Jornada LTER, Current Principal Investigator)
Associate:	Jornada Basin LTER

Data Entities
Data Table Name:	Plant Density at Permanent Quad Locations on the Jornada Experimental Range, 1915-2006
Description:	Plant Density at Permanent Quad Locations on the Jornada Experimental Range, 1915-2006
Other Name:	Quadrat Locations Map
Description:	Quadrat Locations Map

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210351002/48/7a3f624b0f72e7c5dcfc7d3d957027aa
Name:	Plant Density at Permanent Quad Locations on the Jornada Experimental Range, 1915-2006
Description:	Plant Density at Permanent Quad Locations on the Jornada Experimental Range, 1915-2006
Number of Records:	5591
Number of Columns:	9

Table Structure

Object Name:

Jornada_permanent_quadrat_density_data.csv

Size:

368780 bytes

Authentication:

36a12bc3e14638079e3e43f966045688 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

quadrat

project_year

year

month

USDA_code

scientific_name

duration

form

density

Definition:

name of quadrat

year at beginning of project year (May to April)

measurement year

measurement month

USDA plant code (http://plants.usa.gov)

scientific name

growth habitat

growth form

number of plants per square meter

Storage Type:

string

date

string

float

Measurement Type:

nominal

dateTime

nominal

ratio

Measurement Values Domain:

Definition

name of quadrat

Format	YYYY
Precision

Format	YYYY
Precision

Format	MM
Precision

Definition

USDA plant code (http://plants.usa.gov)

Definition

scientific name

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	A
Definition	annual
Source

Code Definition

Code	P
Definition	perrenial
Source

Code Definition

Code	AP
Definition	annual or perennial
Source

Code Definition

Code	BP
Definition	biennial or perrenial
Source

Code Definition

Code	B
Definition	biennial
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	forb
Definition	forb
Source

Code Definition

Code	shrub
Definition	shrub
Source

Code Definition

Code	s-shr
Definition	subshrub
Source

Code Definition

Code	grass
Definition	grass
Source

Unit	ratio
Type	natural
Min	1
Max	919

Missing Value Code:

Code	.
Expl	missing data

Code	.
Expl	missing data

Code	.
Expl	missing data

Code	.
Expl	missing data

Code	.
Expl	missing data

Code	.
Expl	missing data

Code	.
Expl	missing data

Code	.
Expl	missing data

Code	.
Expl	missing data

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Non-Categorized Data Resource

Name:

Quadrat Locations Map

Entity Type:

unknown

Description:

Quadrat Locations Map

Physical Structure Description:

Object Name:

JERPermanent_Quad_Locations.jpg

Size:

437626 bytes

Authentication:

699793352d8e412e1cae2a96047785c5 Calculated By MD5

Externally Defined Format:

Format Name:

unknown

Data:

https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210351002/48/07f62e38f06ac00812d3d8951d8ad8c8

Data Package Usage Rights

This data package is released to the “public domain” under Creative Commons CC0 1.0 “No Rights Reserved” (see: https://creativecommons.org/publicdomain/zero/1.0/). It is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein “website”) in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and its components) is made available “as is” and with no warranty of accuracy or fitness for use. The creators of this data package and the website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

Keywords

By Thesaurus:
Research Networks	LTAR, LTER
LTER Core Areas	Populations, Primary Production
Jornada Data Category	Plant
Dataset Status	ongoing
Research Area	Vegetation Dynamics
vegetation	vegetation
canopy cover	canopy cover

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:

Field protocol: Quadrat dimensions are 1m x 1m. Quadrats are marked by rebar stakes at the four corners and can be relocated by GPS coordinates. Data was recorded as chart quadrat maps, in which the locations and shapes of all living plants located within the quadrat were mapped onto the data sheet. From 1915-1924 mapping was done by dividing the quadrat frame into a decimeter grid using straps and reproducing locations of plants on grid paper. From 1925-2016 mapping was done using a pantograph, a device which allows for more accurate mapping of size and location of plants . Perennial grasses were mapped as polygons representing the boundary of each individual grass bunch at a point 1 inch above the soil surface (i.e. basal area); shrubs were mapped as polygons representing the canopy cover of each individual (package 210351001); and subshrubs and forbs were mapped as point locations only (this package). Digitizing of data sheets: Data sheets (1915-2016) were scanned using an Epson 12000 XL scanner, then digitized and organized into geodatabase layers using ArcMap [software citation]. Perennial grass basal area and shrub canopy cover were digitized as polygons, and area/perimeter of each polygon were calculated by ArcMap. Forbs were digitized as points. Data extraction and compilation: Attribute tables for each geodatabase layer (which included information on the species and size of each individual plant within the quadrat) were extracted, compiled, and error-checked using R to produce the final csv data tables. In the final cover data table, each row records the cover area and perimeter of an individual plant within the quadrat.

People and Organizations

Creators:

Individual:

William Chapline

Contacts:

Individual:

Greg Maurer

Email Address:

datamanager.jrn.lter@gmail.com

Associated Parties:

Individual:

Brandon Bestelmeyer

Organization:

Jornada LTER

Email Address:

brandon.bestelmeyer@ars.usda.gov

Id:

https://orcid.org/0000-0001-5060-9955

Role:

Current Principal Investigator

Individual:

Jornada Basin LTER

Email Address:

https://jornada.nmsu.edu/lter

Role:

Organization

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

1915

End:

2006

Geographic Region:

Description:

Our study site is located in the northern Chihuahuan Desert, approximately 25 km northeast of Las Cruces, New Mexico, USA (+32.6 N, -106.7 W, elevation 1315 m). Annual precipitation is 24 cm and maximum temperatures average 13 C in January and 36 C in June. Our study site includes the 78,000 ha Jornada Experimental Range operated by the USDA Agricultural Research Service (http://jornada.nmsu.edu/), and the 22,000 ha Chihuahuan Desert Rangeland Research Center (CDRRC, http://chihuahuansc.nmsu.edu/) operated by New Mexico State University (http://www.nmsu.edu/

Bounding Coordinates:

Northern:	32.466879	Southern:	32.737108
Western:	-106.926435	Eastern:	-106.528942

Project

Maintenance

Maintenance:

Description:	ongoing
Frequency:

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'ratio'
        |     |     |     |  \___attribute 'multiplierToSI' = 'one'
        |     |     |     |  \___attribute 'name' = 'ratio'
        |     |     |     |  \___attribute 'parentSI' = 'number'
        |     |     |     |  \___attribute 'unitType' = 'numeric'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'number per square meter'
        |     |     |     |___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.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

Data Package Metadata View Summary

Plant Density at Permanent Quad Locations on the Jornada Experimental Range, 1915-2006

Data Entities

Data Table

Non-Categorized Data Resource

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

Maintenance

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Plant Density at Permanent Quad Locations on the Jornada Experimental Range, 1915-2006

+/- Data Entities

Data Table

Non-Categorized Data Resource

+/- 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

+/- 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