Data Package Metadata   View Summary

Earthworms in tropical tree plantations and secondary forests

General Information
Data Package:
Local Identifier:knb-lter-luq.91.346033
Title:Earthworms in tropical tree plantations and secondary forests
Alternate Identifier:DOI PLACE HOLDER
Abstract:

We compared patterns of earthworm abundance and species composition in tree plantations and secondary forests of Puerto Rico. Tree plantations included pine (Pinus caribaea Morelet) and mahogany (Swietenia macrophylla King) established in the 1930s, 1960s, and 1970s; secondary forests were naturally regenerated in areas adjacent to these plantations. We found that (1) earthworm density and fresh weight in the secondary forests were twice those in either of the tree plantations, and did not differ between the plantations, and (2) the exotic earthworm species, Pontoscolex corethrurus M ller, dominated both plantations and the secondary forests, but native earthworm species, Pontoscolex spiralis Borges & Moreno, Estherella montana Gates, and E. gatesi Borges & Moreno, occurred only in the secondary forests. Our results suggest that naturally-regenerated secondary forests are preferable to pine and mahogany plantations for maintaining a high level of earthworm density, fresh weight, and native species.

Publication Date:2010-03-22
Language:English

Time Period
Begin:
1994-01-01
End:
1994-05-01

People and Organizations
Contact:Zou, Xiaoming (University of Puerto Rico, Rio Piedras Campus) [  email ]
Creator:Zou, Xiaoming (University of Puerto Rico, Rio Piedras Campus)
Associate:Melendez-Colom, Eda (University of Puerto Rico, Rio Piedras Campus, data manager)
Associate:Gonzalez, Grizelle (International Institute of Tropical Forestry (IITF), USDA Forest Service, associated researcher)
Associate:Borges, Sonia 

Data Entities
Data Table Name:
Earthworm density and biomass raw data
Description:
Earthworm density and biomass raw data
Data Table Name:
Earthworm species by forests
Description:
Earthworm species by forests
Data Table Name:
Summary of density and biomass data
Description:
Summary of density and biomass data, including standard errors and significance in treatment between forests
Detailed Metadata

Data Entities


Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-luq/91/346033/1b9dcd92dbf357f5629b1b910986490c
Name:Earthworm density and biomass raw data
Description:Earthworm density and biomass raw data
Number of Records:24
Number of Columns:3

Time Period
Begin:
1994-01-01
End:
1994-05-01

Table Structure
Object Name:earthrawdata.csv
Size:401
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 Forest typeNumber of earthworms per square meterEarthworm fresh weight
Column Name:Forest  
DENSITY1(NO-M2)  
FRESHWEIGHT(G-M2)  
Definition:Codes for Forest typesNumber of earthworms found per square meter. When Mean value is reported data has a standard error and a column of ommon letters indicatating that no significant difference among treatments forest in Puerto Rico. ; Duncan's multi-range test; = 0.05)Fresh weight of earthworms recorded after the worms were rinsed with water and dried with paper towels on the same day when they were sampled (in two plots (0.5 x 0.5 m) randomly located in each plantation or its adjacent secondary forest for a total of 24 plots). When Mean value is reported data has a standard error and a column of ommon letters indicatating that no significant difference among treatments forest in Puerto Rico. ; Duncan's multi-range test; = 0.05)
Storage Type:string  
   
Measurement Type:nominalratioratio
Measurement Values Domain:
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codepine
Definitionsite is an abandoned croplands pine plantation in the Guzman sector, El Verde in the Luquillo Experimental Forest
Source
Code Definition
Codesecon
Definitionsite is an abandoned cropland secondary forest in the Guzman sector, El Verde in the Luquillo Experimental Forest
Source
Code Definition
Codemahog
Definitionsite is a cropland mahogany plantation in the Luquillo Experimental Forest
Source
UnitnumberPerMeterSquared
Typereal
UnitgramsPerSquareMeter
Typereal
Missing Value Code:
Codenone
ExplMissing Value
   
Accuracy Report:      
Accuracy Assessment:      
Coverage:      
Methods:      

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-luq/91/346033/fc7b96d120bd91c785c271b44115076f
Name:Earthworm species by forests
Description:Earthworm species by forests
Number of Records:5
Number of Columns:3

Time Period
Begin:
1994-01-01
End:
1994-05-01

Table Structure
Object Name:eart1tb2-sppbyforest.csv
Size:359
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 Forest type - Code listScientific name of native speciesScientific name of exotic species
Column Name:Forest type  
NATIVE_SPECIES  
EXOTIC_SPECIES  
Definition:Codes for Forest typesScientific name of a native earthworm found in a forest typeScientific name of an exotic earthworm found in a forest type. Amynthas rodericensis (Grube), Pontoscolex corethrurus (Muller)
Storage Type:string  
string  
string  
Measurement Type:nominalnominalnominal
Measurement Values Domain:
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codepine
Definitionsite is an abandoned croplands pine plantation in the Guzman sector, El Verde in the Luquillo Experimental Forest
Source
Code Definition
Codesecon
Definitionsite is an abandoned cropland secondary forest in the Guzman sector, El Verde in the Luquillo Experimental Forest
Source
Code Definition
Codemahog
Definitionsite is a cropland mahogany plantation in the Luquillo Experimental Forest
Source
DefinitionScientific name of a native earthworm found in a forest type
DefinitionScientific name of an exotic earthworm found in a forest type. Amynthas rodericensis (Grube), Pontoscolex corethrurus (Muller)
Missing Value Code:
Codenone
ExplMissing Value
   
Accuracy Report:      
Accuracy Assessment:      
Coverage:      
Methods:      

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-luq/91/346033/a9b8b5ee2d6f01809eca5311bb87d76d
Name:Summary of density and biomass data
Description:Summary of density and biomass data, including standard errors and significance in treatment between forests
Number of Records:3
Number of Columns:6

Time Period
Begin:
1994-01-01
End:
1994-05-01

Table Structure
Object Name:eart1tb1-datasummary.csv
Size:181
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 Forest typeNumber of earthworms per square meterStandard error mean number of earthwormsEarthworm fresh weightStandard error fresh mean weight of earthwormsSignificant difference among treatments forest in Puerto Rico
Column Name:Forest  
DENSITY1(NO-M2)  
DENSITYWEIGHT std err  
FRESHWEIGHT(G-M2)  
FRESH std err  
SIGNIFICANCEDIFFERENCE  
Definition:Codes for Forest typesNumber of earthworms found per square meter. When Mean value is reported data has a standard error and a column of ommon letters indicatating that no significant difference among treatments forest in Puerto Rico. ; Duncan's multi-range test; = 0.05)The standard error of the mean number of earthworms found per square meterFresh weight of earthworms recorded after the worms were rinsed with water and dried with paper towels on the same day when they were sampled (in two plots (0.5 x 0.5 m) randomly located in each plantation or its adjacent secondary forest for a total of 24 plots). When Mean value is reported data has a standard error and a column of ommon letters indicatating that no significant difference among treatments forest in Puerto Rico. ; Duncan's multi-range test; = 0.05)The standard error for the mean weight of fresh earthwormsCommon letters indicate no significant difference among treatments in forest in Puerto Rico.
Storage Type:string  
        string  
Measurement Type:nominalratioratioratiorationominal
Measurement Values Domain:
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codepine
Definitionsite is an abandoned croplands pine plantation in the Guzman sector, El Verde in the Luquillo Experimental Forest
Source
Code Definition
Codesecon
Definitionsite is an abandoned cropland secondary forest in the Guzman sector, El Verde in the Luquillo Experimental Forest
Source
Code Definition
Codemahog
Definitionte is a cropland mahogany plantation in the Luquillo Experimental Forest
Source
UnitnumberPerMeterSquared
Typereal
UnitnumberPerMeterSquared
Typereal
UnitgramsPerSquareMeter
Typereal
UnitgramPerMeterSquared
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codea
DefinitionFirst classification of no significance difference in density or fresh weight of worms in the secoindary forest did not differ between pine and mahogany plantations
Source
Code Definition
Codeb
DefinitionSecond classification of no significant difference in density or fresh weight of worms in the secoindary forest did not differ between pine and mahogany plantations
Source
Missing Value Code:
Codenone
ExplMissing Value
         
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,

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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.
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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, populations
LTER Controlled Vocabularyecosystems, terrestrial ecosystems, forest ecosystems, forests, organisms, plants, trees, processes, restoration

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:

We used three plantations of each tree species (Pinus caribaea and Swietenia macrophylla) and their adjacent secondary forests, located between 200 m and 600 m elevation in the LEF. Each of the six pairs (plantations/secondary forests) have the same age, and similar topography, soil, and climate conditions. Two pine plantations were established in 1962 and one in 1977 with a 3 x 3 m tree spacing on the abandoned croplands near Cubuy and Guzman, respectively. These lands were cleared by bulldozers before planting pine seedlings. By 1989, the canopy of the pine plantation was mainly a monoculture, but Casearia sylvestris Sw., Didymopanax morototoni (Aubl.) Decne. & Planch., and Tabebuia heterophylla (DC.) Britton were among the native woody species presented in a well developed understory. The average litter production was 7.0 Mg/ha/yr. Two plantations of Swietenia macrophylla were established in 1932 near El Verde Field Station and one in 1963 near Sabana. Tree spacing ranged from irregular to 7.6 x 2.4 m (Lugo 1992). In 1984, the overstory of the plantations were dominated by mahogany, but Ocotea leucoxylon (Sw.) Mez., Tabebuia heterophylla, and Myrcia splendens (Sw.) DC. were also found in the understory. Average litter production was 10.8 Mg/ha/yr. Secondary forests were naturally regenerated adjacent to the pine and mahogany plantations on the same abandoned lands with similar soil conditions. By 1989, the secondary forests were dominated by Tabebuia heterophylla, Casearia arboria (L.C. Rich) Urban, Syzygium jambos (L.) Alston, and Manilkara bidentata (A. DC.) Chev. Average litter production was 6.15 Mg/ha/yr (Cuevas et al. 1991, Lugo 1992). All field data were obtained between January and May, 1994. Earthworms were sampled in two plots (0.5 x 0.5 m) randomly located in each plantation or its adjacent secondary forest for a total of 24 plots. Ground litter (leaves and twigs < 2 mm) was collected from each plot and litter biomass was obtained after drying leaves and twigs at 60 C for at least 72 hrs. Leaves were analyzed for total extractable polyphenolics content using the Folin-Denis reagent (Horowitz 1970, Anderson & Ingram 1989) and were reported as percent tannic acid equivalent (% TAE). Soils beneath the litter were collected by shovel to a depth of 0.25 m and placed onto a cloth sheet. Earthworms were hand sorted and stored in plastic bags in a cooler with ice. Fresh weight of earthworms was recorded after the worms were rinsed with water and dried with paper towels on the same day when they were collected. A small subsample of the soil (0 - 0.25 m) was used for measuring pH and moisture content. Soil water content was calculated for each site by oven drying 10 g of fresh sample at 105 C for 48 hrs and reported on the oven-dry basis. Soil pH was measured using a paste of 1:1 ratio of fresh soil and deionized water. Data was analyzed using ANOVA (SAS 1987) to compare differences among the plantations and the secondary forests. Where significant differences were found, Duncan's multiple range test was employed to compare differences among pine, mahogany and secondary forest. Earthworm density and fresh weight were correlated with soil pH, moisture content, ground litter biomass, and litter polyphenolics content using a simple linear correlation analysis (SAS, 1987).

People and Organizations

Creators:
Individual: Xiaoming Zou
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 x2868 (voice)
Phone:
(787) 772-1481 (facsimile)
Email Address:
xzou2011@gmail.com
Contacts:
Individual: Xiaoming Zou
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 x2868 (voice)
Phone:
(787) 772-1481 (facsimile)
Email Address:
xzou2011@gmail.com
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
Individual: Grizelle Gonzalez
Organization:International Institute of Tropical Forestry (IITF), USDA Forest Service
Address:
Int. Inst. of Tropical Forestry / USDA Forest Service Jardín Botánico Sur 1201 Calle Ceiba,
San Juan, PR 00926 US
Phone:
(787) 764-7800 (voice)
Phone:
(787) 766-6302 (facsimile)
Email Address:
ggonzalez@fs.fed.us
Role:associated researcher
Individual: Sonia Borges
Address:
Departamento de Biología, Universidad de Puerto Rico Mayagüez,
Mayagüez, PR 00681 US
Phone:
(787) 832-4040 x5463 (voice)
Phone:
(787) 265-3837 (facsimile)
Email Address:
sborges@uprm.edu
Web Address:
http://www.uprm.edu/biology/profs/borges/
Role:associated researcher

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
1994-01-01
End:
1994-05-01
Sampling Site: 
Description:The location for this site is an approximation; the coordinates assigned to this site belong to the Rio Grande Plantation Eco Resort, PR-956 Rio Grande, Río Grande 00745 using Google Maps.
Site Coordinates:
Longitude (degree): -65.8379Latitude (degree): 18.3458
Altitude (meter):38
Sampling Site: 
Description:The location for this site is an approximation; the coordinates assigned to this site using Google Maps are of a location in Camino Los Ruiz Rio Grande, 00745
Site Coordinates:
Longitude (degree): -65.8382Latitude (degree): 18.351
Altitude (meter):61
Sampling Site: 
Description:The location for this site is an approximation; the coordinates assigned to this site using Google Maps are of a location East to Hwy 186 in the El Yunque National Forest.
Site Coordinates:
Longitude (degree): -65.8382Latitude (degree): 18.296
Altitude (meter):478

Temporal, Geographic and/or Taxonomic information that applies to Data Table: Earthworm density and biomass raw data


Time Period
Begin:
1994-01-01
End:
1994-05-01

Temporal, Geographic and/or Taxonomic information that applies to Data Table: Earthworm species by forests


Time Period
Begin:
1994-01-01
End:
1994-05-01

Temporal, Geographic and/or Taxonomic information that applies to Data Table: Summary of density and biomass data


Time Period
Begin:
1994-01-01
End:
1994-05-01

Project

Other Metadata

Additional Metadata

additionalMetadata
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        |     |     |___element 'unit' in ns 'http://www.xml-cml.org/schema/stmml-1.1' ('stmml:unit')
        |     |     |     |  \___attribute 'abbreviation' = 'g/m²'
        |     |     |     |  \___attribute 'constantToSI' = '0'
        |     |     |     |  \___attribute 'id' = 'gramPerMeterSquared'
        |     |     |     |  \___attribute 'multiplierToSI' = '0.001'
        |     |     |     |  \___attribute 'name' = 'gramPerMeterSquared'
        |     |     |     |  \___attribute 'parentSI' = 'kilogramsPerSquareMeter'
        |     |     |     |  \___attribute 'unitType' = 'arealMassDensity'
        |     |     |     |___text '\n          '
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        |     |     |     |     |___text 'grams per square meter'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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