Data Package Metadata   View Summary

Canopy gap survey at El Verde

General Information
Data Package:
Local Identifier:knb-lter-luq.8.112534
Title:Canopy gap survey at El Verde
Alternate Identifier:DOI PLACE HOLDER
Abstract:

The survey of gaps at El Verde covers about 35 ha, including the 9 ha grid.  We defined a treefall gap at El Verde as a hole in the forest canopy extending down to an average height of about 3 m or less above ground. The edge of a gap was delineated by the vertical projection of the edge of the canopy foliage. We measured the dimensions ofs present in the 35-ha study site in August 1989, one month before Hurricane Hugo. For each gap we measured L, the longest axis of the gap (distance between edges), and W, the longest axis perpendicular to L, and then approximated gap area as that of an ellipse: Area = p LW/4 (Runkle 1992). Only openings ³ 20 m2; were counted as gaps.

Publication Date:2010-03-22
Language:English

Time Period
Begin:
1988-11-01
End:
1988-11-30

People and Organizations
Contact:Brokaw, Nicholas (University of Puerto Rico, Rio Piedras Campus) [  email ]
Creator:Brokaw, Nicholas (University of Puerto Rico, Rio Piedras Campus)
Associate:Melendez-Colom, Eda (University of Puerto Rico, Rio Piedras Campus, data manager)

Data Entities
Data Table Name:
Canopy gap survey at El Verde
Description:
Canopy gap survey at El Verde
Detailed Metadata

Data Entities


Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-luq/8/112534/fac22fa06f3daeb55829b127f4bf7cde
Name:Canopy gap survey at El Verde
Description:Canopy gap survey at El Verde
Number of Records:76
Number of Columns:3

Time Period
Begin:
1988-11-01
End:
1988-11-07

Table Structure
Object Name:Gapsurve.csv
Size:684
Text Format:
Number of Header Lines:1
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 gapnumlength_mwidth_m
Column Name:Gap identification code  
Gap length  
Gap width  
Definition:Identification given to gap where observation was performedLength of gap measured in metersWidth of gap measured in meters
Storage Type:string  
   
Measurement Type:nominalratioratio
Measurement Values Domain:
DefinitionIdentification given to gap where observation was performed
Unitmeter
Typereal
Unitmeter
Typereal
Missing Value Code:      
Accuracy Report:      
Accuracy Assessment:      
Coverage:      
Methods:      

Data Package Usage Rights

Data Policies

LTER Network Data Access Policy, Data Access Requirements, and General Data Use Agreement
approved by the LTER Coordinating Committee April 6, 2005

Long Term Ecological Research Network Data Access Policy

The LTER data policy includes three specific sections designed to express shared network policies regarding the release of LTER data products, user registration for accessing data, and the licensing agreements specifying the conditions for data use.

LTER Network Data Release Policy

Data and information derived from publicly funded research in the U.S. LTER Network, totally or partially from LTER funds from NSF, Institutional Cost-Share, or Partner Agency or Institution where a formal memorandum of understanding with LTER has been established, are made available online with as few restrictions as possible, on a nondiscriminatory basis. LTER Network scientists should make every effort to release data in a timely fashion and with attention to accurate and complete metadata.

Data[current-user:created]

There are two data types:

Type I – data are to be released to the general public according to the terms of the general data use agreement (see Section 3 below) within 2 years from collection and no later than the publication of the main findings from the dataset and,

Type II - data are to be released to restricted audiences according to terms specified by the owners of the data. Type II data are considered to be exceptional and should be rare in occurrence. The justification for exceptions must be well documented and approved by the lead PI and Site Data Manager. Some examples of Type II data restrictions may include: locations of rare or endangered species, data that are covered under prior licensing or copyright (e.g., SPOT satellite data), or covered by the Human Subjects Act. Researchers that make use of Type II Data may be subject to additional restrictions to protect any applicable commercial or confidentiality interests.

While the spirit of this document is to promote maximum availability for ecological data in either Type I or II status, there are criteria by which priority for data release may be determined. Primary observations collected for core research activities directly supported by LTER research must receive the highest priority for data release. Data collected by other sources to which LTER supported research has added value is also a high priority Other types of data including non-LTER data that was acquired for LTER research, student thesis data, schoolyard LTER data, or legacy data that already suffer from inadequate documentation or format obsolescence may be ranked a lower priority by a site with justifications provided in their data management policy. Finally, some data may be determined of lowest priority for archiving on the grounds that they are interim data that led to final products that carry the scientific value. These might include data files created during stages within an analytic workflow, raw or replicate data values that were subsequently aggregated or processed for release, or individual outputs from stochastic models.

Metadata

Metadata documenting archived/online data sets of all types listed above will be made available when, or before, the dataset itself is released according to the terms above.
All metadata will be publicly available regardless of any restrictions on access to the data.
All metadata will follow LTER recommended standards and will minimally contain adequate information on proper citation, access, contact information, and discovery. Complete information including methods, structure, semantics, and quality control/assurance is expected for most datasets and is strongly encouraged.
LTER Network Data Access Requirements

The access to all LTER data is subject to requirements set forth by this policy document to enable data providers to track usage, evaluate its impact in the community, and confirm users' acceptance of the terms of acceptable use. These requirements are standardized across the LTER Network to provide contractual exchange of data between Site Data Providers, Network Data Providers, and Data Users that can be encoded into electronic form and exchanged between computers. This will allow direct access to data via a common portal once these requirements have been fulfilled. The following information may be required directly or by proxy prior to the transference of any data object:

Registration

1. Name

2. Affiliation

3. Email Address

4. Full Contact Information

Acceptance of the General Public Use Agreement or Restricted Data Use Agreement, as applicable.
A Statement of Intended Use that is compliant with the above agreements. Such statements may be made submitted explicitly or made implicitly via the data access portal interface.

General Data Use Agreement

LUQ  data and metadata is released under public domain:  CC BY – Attribution.

Conditions of Use

The consumer of these data (“Data User” herein) has an ethical obligation 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 coauthorship 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.
Disclaimer

While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.[current-user:name]

Keywords

By Thesaurus:
Core Areasdisturbance, primary production
LTER Controlled Vocabularyorganisms, canopy gaps, canopies

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:

Within this area, the canopy gap area of all recent gaps (sept. 1989) are marked with yellow flagging and have been roughly measured. Each gap has a unique identifying number. Canopy gap area is determined by measuring with a rangefinder, or estimating, the lenght of the long and short axes of the hole in the canopy and using these figures to calculate the area of an ellipse as an approximation of the gap area.

People and Organizations

Creators:
Individual: Nicholas Brokaw
Organization:University of Puerto Rico, Rio Piedras Campus
Address:
Institute for Tropical Ecosystem Studies University of Puerto Rico at Río Piedras P.O. Box 21910,
San Juan, PR 00931 US
Phone:
(787) 764-0000 (ext. 4943) (voice)
Phone:
(787) 772-1481 (facsimile)
Email Address:
nbrokaw@lternet.edu
Contacts:
Individual: Nicholas Brokaw
Organization:University of Puerto Rico, Rio Piedras Campus
Address:
Institute for Tropical Ecosystem Studies University of Puerto Rico at Río Piedras P.O. Box 21910,
San Juan, PR 00931 US
Phone:
(787) 764-0000 (ext. 4943) (voice)
Phone:
(787) 772-1481 (facsimile)
Email Address:
nbrokaw@lternet.edu
Associated Parties:
Individual: Eda Melendez-Colom
Organization:University of Puerto Rico, Rio Piedras Campus
Address:
University of Puerto Rico at Rio Piedras, Ponce de Leon Ave.,
San Juan, PR 00931 US
Phone:
(787) 764-0000 (voice)
Email Address:
edacorreo@yahoo.com
Role:data manager

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
1988-11-01
End:
1988-11-30
Sampling Site: 
Description:El Verde Research Area Cecropia saplings gaps (1-76)
Site Coordinates:
Longitude (degree): -65.8167Latitude (degree): 18.3228
Altitude (meter):384

Temporal, Geographic and/or Taxonomic information that applies to Data Table: Canopy gap survey at El Verde


Time Period
Begin:
1988-11-01
End:
1988-11-07

Project

Other Metadata

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

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