Data Package Metadata   View Summary

Experimentally manipulated biota over a 30-40d period in two streams with distinctly different macrobiotic assemblages

General Information
Data Package:
Local Identifier:knb-lter-luq.104.70
Title:Experimentally manipulated biota over a 30-40d period in two streams with distinctly different macrobiotic assemblages
Alternate Identifier:DOI PLACE HOLDER
Abstract:

Here we test the hypothesis that differences in macrobiotic assemblages can lead to differences in the quantity and quality of organic matter in benthic depositional environments among streams in montane Puerto Rico. We experimentally manipulated biota over a 30-40d period in two streams with distinctly different macrobiotic assemblages: one characterized by high densities of omnivorous shrimps (Decapoda: Atyidae and Xiphocarididae) and no predaceous fishes. To incorporate the natural hydrologic regime and to avoid confounding artifacts associated with cage enclosure/exclosure (e.g., high sedimentation), we used electricity as a mechanism for experimental exclusion, in situ. In each stream, shrimps and/or fishes were excluded from specific areas of rock substrata in four pools using electric "fences" attached to solar-powered fence chargers. In the stream lacking predaceous fishes (Sonadora), the unelectrified control treatment was almost exclusively dominated by high densities of omnivorous shrimps that constantly ingested fine particulate material from rock surfaces. Consequently, the control had significantly lower levels of inorganic sediments, organic material, carbon and nitrogen than the exclusion treatment, as well as less variability in these parameters. Tenfold more organic material (as ash-free dry mass, AFDM) and fivefold more nitrogen accrued in shrimp exclosures (10.6 g AFDM/m2, 0.2 g N/m2) than in controls (1.1 g AFDM/m2, 0.04 g N/m2). By reducing th quantity of fine particulate organic material and associated nitrogen in benthic environments, omnivorous shrimps potentially affect the the supply of this important resource to other trophic levels. The small amount of fine particulate organic matter (FPOM) that remained in control treatments (composed of sparse algal cells0 was of higher quality than that in shrimp exclosures. This is evidenced by the significantly lower carbon-to-nitrogen (C/N) ratio (an indicator of food quality, with relatively low C/N indicating higher food quality) in the control relative to the shrimp exclosure treatment. In contrast, the stream with predaceous fishes (Bisley) was characterized by very low numbers of shrimps, and macrobiota had no significant effect on benthic sediments, organic matter, C, N, and C/N. All parameters were highly variable through time, with levels and ranges in variability similar to the shrimp exclusion treatment in the Sonadora. Our experimental results are consistent with findings of an independent survey of six streams in four different drainages. Four streams that had an abundance of omnivorous shrimps but lacked predaceous fishes, had extremely low levels of fine benthic organic and inorganic material. In contrast, two streams that had low densities of shrimps and contained predaceous fishes had significantly higher levels. Results show a strong linkage between species and ecosystem characteristics: interstream differences in the quantity and quality of fine benthic organic matter resources were determined by the nature of the macrobiotic assemblage. Furthermore, patterns in the distribution of shrimp assemblages reflected landscape patterns in the benthic depositional environment among streams.

Publication Date:2010-03-22
Language:English

Time Period
Begin:
1994-06-20
End:
1994-08-13

People and Organizations
Contact:Pringle, Catherine  [  email ]
Creator:Pringle, Catherine 
Associate:Melendez-Colom, Eda (University of Puerto Rico, Rio Piedras Campus, data manager)
Associate:Bednarek, Angel 
Associate:March, James 
Associate:Hemphill, Nina 
Associate:McDowell, William H. 

Data Entities
Data Table Name:
The number of shrimps and fishes observed visiting control hoops in the Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- over each experimental period. Figure 2.
Description:
The number of shrimps and fishes observed visiting control hoops in the Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- over each experimental period. Figure 2.
Data Table Name:
Total suspended particulate material over time in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams throughout each experiment. Figure 3.
Description:
Total suspended particulate material over time in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams throughout each experiment. Figure 3.
Data Table Name:
The number of shrimps and fishes observed visiting control hoops in the Sonadora
Description:
Accrual of inorganic and ash-free dry mass of benthic particulate material in macrobiota exclusion and control treatments in Sonadora June 20, 1994 to July 30, 1994 and Bisley July 14, 1994 to August 13, 1994 streams during each experiment. Figures 4 and 5.
Data Table Name:
Carbon and Nitrogen, associated with benthic particulate material in macrobiota exclusion and control treatments in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams during experimental period. Figures 6, 7, a
Description:
Carbon and Nitrogen, associated with benthic particulate material in macrobiota exclusion and control treatments in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams during experimental period. Figures 6, 7, and 8.
Detailed Metadata

Data Entities


Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-luq/104/70/3baa8dee27cf1e0ee6bb9359b67a083c
Name:The number of shrimps and fishes observed visiting control hoops in the Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- over each experimental period. Figure 2.
Description:The number of shrimps and fishes observed visiting control hoops in the Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- over each experimental period. Figure 2.
Number of Records:1279
Number of Columns:4

Time Period
Begin:
1994-06-20
End:
1994-08-13

Table Structure
Object Name:Fig2.csv
Size:20774
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 Stream were observations were doneNumber of days inside the mineNumber of ShrimpNumber of Gobies
Column Name:Stream  
days  
NumberOfShrimp  
NumberofGobies  
Definition:The stream in which the experiment took placeNumber of days of larvae of Acrocercops species inside mineThe number of shrimp entering a 32cm in diameter ring in a 2 minute period. (If the same sites and similar sampling methods are employed the experiment should be replicable).The number of gobies entering a 32cm in diameter hoop in a 2 minute period
Storage Type:string  
     
Measurement Type:nominalratioratioratio
Measurement Values Domain:
DefinitionThe stream in which the experiment took place
Unitnumber
Typereal
Min
Max10 
Unitdimensionless
Typereal
Unitdimensionless
Typereal
Missing Value Code:    
Codenone
ExplMissing Value
Codenone
ExplMissing Value
Accuracy Report:        
Accuracy Assessment:        
Coverage:        
Methods:        

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-luq/104/70/24615a11da764299397dfe933817bc10
Name:Total suspended particulate material over time in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams throughout each experiment. Figure 3.
Description:Total suspended particulate material over time in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams throughout each experiment. Figure 3.
Number of Records:64
Number of Columns:4

Time Period
Begin:
1994-06-20
End:
1994-08-13

Table Structure
Object Name:Fig3.csv
Size:1674
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 Stream were observations were doneNumber of days inside the mineAsh Free Dry Mass in g/m2Discharge
Column Name:Stream  
days  
AshFreeDryMass_g/m2  
Discharge  
Definition:The stream in which the experiment took placeNumber of days of larvae of Acrocercops species inside mineThe mass of organic matter for a defined area in g/m2Discharge in m3 per seconds
Storage Type:string  
     
Measurement Type:nominalratioratioratio
Measurement Values Domain:
DefinitionThe stream in which the experiment took place
Unitnumber
Typereal
Min
Max10 
UnitgramsPerSquareMeter
Typereal
UnitcubicMetersPerSecond
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/104/70/f6cdac42063af64df65139c1776ba44c
Name:The number of shrimps and fishes observed visiting control hoops in the Sonadora
Description:Accrual of inorganic and ash-free dry mass of benthic particulate material in macrobiota exclusion and control treatments in Sonadora June 20, 1994 to July 30, 1994 and Bisley July 14, 1994 to August 13, 1994 streams during each experiment. Figures 4 and 5.
Number of Records:32
Number of Columns:5

Time Period
Begin:
1994-06-20
End:
1994-08-13

Table Structure
Object Name:Fig45.csv
Size:1333
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 Stream were observations were doneTreatment control or a electro exclusion experimentNumber of days inside the mineAsh Free Dry Mass in g/m2Inorganic Dry Mass g/m2
Column Name:Stream  
Treatment  
days  
AshFreeDryMass_g/m2  
InorganicDryMass_g/m2  
Definition:The stream in which the experiment took placeWhether it is a control or a electro exclusion experimentNumber of days of larvae of Acrocercops species inside mineThe mass of organic matter for a defined area in g/m2The mass of inorganic matter for a defined area in g/m2. If the same sites and similar sampling methods are employed the experiment should be replicable.
Storage Type:string  
string  
     
Measurement Type:nominalnominalratioratioratio
Measurement Values Domain:
DefinitionThe stream in which the experiment took place
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeControl
Definitionelectro experiment
Source
Code Definition
CodeExclusion
Definitionelectro exclusion experiment
Source
Unitnumber
Typereal
Min
Max10 
UnitgramsPerSquareMeter
Typereal
UnitgramsPerSquareMeter
Typereal
Missing Value Code:      
Codenone
ExplMissing Value
Codenone
ExplMissing Value
Accuracy Report:          
Accuracy Assessment:          
Coverage:          
Methods:          

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-luq/104/70/75493886d847c5a82110f62b3cd9e53c
Name:Carbon and Nitrogen, associated with benthic particulate material in macrobiota exclusion and control treatments in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams during experimental period. Figures 6, 7, a
Description:Carbon and Nitrogen, associated with benthic particulate material in macrobiota exclusion and control treatments in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams during experimental period. Figures 6, 7, and 8.
Number of Records:26
Number of Columns:5

Time Period
Begin:
1994-06-20
End:
1994-08-13

Table Structure
Object Name:Fig678.csv
Size:1067
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 Stream were observations were doneTreatment control or a electro exclusion experimentDay of the month when sampling or observation was doneN-NitrogenC-Carbon
Column Name:Stream  
Treatment  
day  
N_g/m2  
C_g/m2  
Definition:The stream in which the experiment took placeWhether it is a control or a electro exclusion experimentDay of the month when sample was gathered, from 1 to 31 (or 30, 28)The total amount of Nitrogen for a defined area in g/m2.The total amount of Carbon for a defined area
Storage Type:string  
string  
date  
   
Measurement Type:nominalnominaldateTimeratioratio
Measurement Values Domain:
DefinitionThe stream in which the experiment took place
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeControl
Definitionelectro experiment
Source
Code Definition
CodeExclusion
Definitionelectro exclusion experiment
Source
FormatDD
Precision
UnitgramsPerSquareMeter
Typereal
UnitgramsPerSquareMeter
Typereal
Missing Value Code:      
Codenone
ExplMissing Value
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.

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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]

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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.
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Keywords

By Thesaurus:
Core Areasorganic matter
LTER Controlled Vocabularyecosystems, aquatic ecosystems, rivers, streams, terrestrial ecosystems, watersheds, measurements, ecosystem properties, biomass, organisms, animals, vertebrates, fishes, seston, processes, physical processes, atmospheric processes, deposition, geological processes, sedimentation, scientific activities, electric exclusion, substances, elements and compounds, carbon, nitrogen, inorganic matter, organic matter, particulates

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:

Biotic manipulations were conducted in the Sonadora and 30 d in the Bisley - 3 stream. Experiments were staggered to accomodate other studies being conducted in these gauged watersheds. In both streams we used circular electrified "fences" (hoops) to excludes fishes and shrimps larger than 1 cm in length from foraging within specific areas of the stream bottom. For a more detailed description of the methodology see publication .

People and Organizations

Creators:
Individual: Catherine Pringle
Address:
University of Georgia Odum School of Ecology 308 Biological Sciences Building,
Athens, GA 30602 US
Phone:
(706) 542-4289 (voice)
Phone:
(706) 542-3344 (facsimile)
Email Address:
cpringle@uga.edu
Web Address:
http://pringle-lab.org/
Contacts:
Individual: Catherine Pringle
Address:
University of Georgia Odum School of Ecology 308 Biological Sciences Building,
Athens, GA 30602 US
Phone:
(706) 542-4289 (voice)
Phone:
(706) 542-3344 (facsimile)
Email Address:
cpringle@uga.edu
Web Address:
http://pringle-lab.org/
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: Angel Bednarek
Address:
US
Email Address:
notavailable@lternet.edu
Role:associated researcher
Individual: James March
Address:
US
Email Address:
march@sparc.ecology.uga.edu
Role:associated researcher
Individual: Nina Hemphill
Address:
PO Box 1300 1313 South Main Street,
Weaverville, CA 96093 US
Phone:
(530) 623-1812 (voice)
Phone:
(530) 623-5944 (facsimile)
Email Address:
nhemphill@usbr.gov
Role:associated researcher
Individual: William H. McDowell
Address:
University of New Hampshire Department of Natural Resources James Hall,
Durham, NH 3824 US
Phone:
(603) 862-2249 (voice)
Phone:
(603) 862-4976 (facsimile)
Email Address:
wmcdowell@lternet.edu
Web Address:
http://nre.unh.edu/faculty/mcdowell
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:
1994-06-20
End:
1994-08-13
Sampling Site: 
Description:Latitude 18°19'24",   Longitude 65°49'03"   NAD27 Rio Grande Municipio, Puerto Rico, Hydrologic Unit 21010005 Drainage area: 1.01 square miles Datum of gage: 1,230 feet above   NGVD29.
Site Coordinates:
Longitude (degree): -65.8175Latitude (degree): 18.3233
Altitude (meter):375
Sampling Site: 
Description:Latitude 18°19'46",   Longitude 65°45'04"   NAD27 Rio Grande Municipio, Puerto Rico, Hydrologic Unit 21010005 Drainage area: 6.88 square miles Datum of gage: 275 feet above   NGVD29.
Site Coordinates:
Longitude (degree): -65.7511Latitude (degree): 18.3178
Altitude (meter):154

Temporal, Geographic and/or Taxonomic information that applies to Data Table: The number of shrimps and fishes observed visiting control hoops in the Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- over each experimental period. Figure 2.


Time Period
Begin:
1994-06-20
End:
1994-08-13

Temporal, Geographic and/or Taxonomic information that applies to Data Table: Total suspended particulate material over time in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams throughout each experiment. Figure 3.


Time Period
Begin:
1994-06-20
End:
1994-08-13

Temporal, Geographic and/or Taxonomic information that applies to Data Table: The number of shrimps and fishes observed visiting control hoops in the Sonadora


Time Period
Begin:
1994-06-20
End:
1994-08-13

Temporal, Geographic and/or Taxonomic information that applies to Data Table: Carbon and Nitrogen, associated with benthic particulate material in macrobiota exclusion and control treatments in Sonadora -June 20, 1994 to July 30, 1994- and Bisley -July 14, 1994 to August 13, 1994- streams during experimental period. Figures 6, 7, a


Time Period
Begin:
1994-06-20
End:
1994-08-13

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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