LUQ LTER DATA SETS DOCUMENTATION FORM

ON-LINE VERSION

A DATA SET is a series of observations collected by the same methodology. Each data set should have documentation sufficient for someone unfamiliar with the research to replicate the study. Data sets may be broken into subsets (data files) that are discrete in space and time, in that order. The documentation for a data set should include all spatial and temporal subdivisions of the data.

(Data, Abstract, Methods, Variables)

NOTES:

PERSON(S) COMPLETING THIS FORM: E-MAIL ADDRESS:

Todd Crowl 

tcrowl@lternet.edu

Eda C. Melendez-Colom

emelendez@lternet.edu

DATA SET IDENTIFIER: Shrimp populations in Quebrada Prieta (Pools 0, 8, 9, 15), (El Verde)

PROJECT TITLE: Fresh Water Shrimp Population Dynamics

PROJECT DESCRIPTION: Spatial and temporal patterns of abundances for coexisting species: different intensities and frequencies of disturbances can alter spatial and temporal patterns of abundances for coexisting species. To determine if these different hydrologic regimes altered distributions of populations, we compared shrimp densities during different periods of time. There were significant differences in the relationships between locations of stream pools along an elevational gradient (300 to 470 m) and the abundances of two species of shrimp (Atya lanipes and Xiphocaris elongata) during the following three periods: pre-Hurricane Hugo (20 mo), post-Hurricane Hugo (50 mo), and low-flow (12 mo).

Mechanisms that likely cause different patterns of distribution (See Abstract) include avoidance of predators coupled with active preference by prey species for pool habitats with low frequency of washout by storm flows, and with sufficient storage of food resources (microbially conditioned leaf detritus).

LTER CORE AREAS: (Annotate all that apply)  
Population Dynamics 

LEF LTER 1 RESEARCH TOPIC: (Annotate all that apply)  
Spatial and Temporal Distribution of Populations

We define a data file as a component of a data set. A data set can have only one data file or more. Basically, different data files have different data structures or format.
DATA SET FILES (SUBSETS):
NOTE: Please contact Alan Covich (acovich@lternet.edu) for the use of this data file.
Data File No. Data File Identifier On-Line Filename Starting Date Periodicity of sample End Period
1
Freshwater bi-annual shrimp data from Pool 0 in Quebrada Prieta since 1988 ShrimpPool-0-bianual.txt January 1, 1988 at least bi-annually November 30, 2008
2
Freshwater bi-annual shrimp data from Pool 8 in Quebrada Prieta since 1988 ShrimpinPool-8-bianual.txt January 1, 1988 at least bi-annually November 30, 2008
3
Freshwater bi-annual shrimp data from Pool 15 in Quebrada Prieta since 1988 ShrimpinPool-15-bianual.txt January 1, 1988 weekly November 30, 2008
4
Freshwater weekly shrimp data from Pool 0 in Quebrada Prieta since 1988 ShrimpPool-0-weekly.txt January 1, 1993 weekly December 31, 2008
5
Freshwater weekly shrimp data from Pool 8 in Quebrada Prieta since 1988 ShrimpPool-8-weekly.txt January 1, 1993 weekly December 31, 2008
6
Freshwater weekly shrimp data from Pool 15 in Quebrada Prieta since 1988 ShrimpPool-9-weekly.txt January 1, 1993 weekly December 31, 2008

Charts corresponding to these data (1988 to 2008):

  POOL 0 POOL 8 POOL 15
Macrobrachium MACRO_POOL0-BIANNUAL Pool8-MACRO Pool15-MACRO
Xiphocaris elongata Pool0-Xipho Pool8-Xipho Pool15-Xipho
Atya lanipes Pool0-Atya Pool8-Atya Pool15-Atya

RESEARCH LOCATION: El Verde Area, Pool 0 in Quebrada Prieta (on Ox-cart Trail), Pool 8 in Quebrada Prieta (On Odum Trial about 200 meters upstream the Ox-cart Trail), Pool 15 in Quebrada Prieta (the upstream pool in the Q. Prieta)

INVESTIGATORS:

PRINCIPAL INVESTIGATORS E-MAIL address

Todd Crowl 

tcrowl@lternet.edu

OTHER RESEARCHERS E-MAIL address
Alan Covich acovich@lternet.edu
Omar Perez operez-reyes@lternet.edu

CONTACT PERSONS E-MAIL address Phone Number (Include area code)

Todd Crowl 

tcrowl@lternet.edu

W: (435)797-2498;
Cell: (435)760-1335

SOURCE OF FUNDING (SPONSOR): NSF-LTER

DATA SET ABSTRACT: Freshwater shrimp from the Quebrada Prieta (a tributary to the Sonadora in the Espiritu Santu drainage, have been censused 6 times yearly since 1988. Atya lanipes, Xiphocaris elongata and Macrobrachium spp. are regularly captured and comprise the species in this data base.

DATA SET METHODS: Shrimp are sampled during six periods each year. Each period represents a two month range (e.g. period 1 = January-February; period 2 = March-April, etc.). Wire minnow traps, baited with cat food are placed into the stream during the late afternoon and retrieved the following morning. All shrimp from each trap are enumerated by species and released.

REFERENCES:
Covich, A.P., (1)T.A. Crowl*, S.L. Johnson*, D. Varza*, and D. Certain*. 1991. Post-Hurricane Hugo increases in atyid shrimp abundances in a Puerto Rican montane stream. Biotropica 23:448-454.

Johnson, S.L.*, A.P. Covich, (1)T.A. Crowl, A. Estrada-Pinto, J. Bithorn, and W. Wurtsbaugh. 1996. Do seasonality and disturbance influence reproduction in freshwater atyid shrimp in headwater streams, Puerto Rico Verhandlungen Internationale Vereinigung Limnologie 26:2076-2081.

Covich, A.P., (1)T.A. Crowl, S.L. Johnson,* and M. Pyron*. 1996. Distribution and abundance of tropical freshwater shrimp along a stream corridor: response to disturbance. Biotropica 28:484-492.

CROSS-REFERENCES (other data sets related to this one): LTERDBAS #55: Shrimp and stream pool raw data
 
SAMPLE LOCATION: Quebrada Prieta, where the ox cart trail crosses

STORAGE SITES (of data files): ITES, Data Mngr.'s Cabinet DM333-01, Drawer #3

INVESTIGATOR'S ASSIGNED KEYWORDS: recolonization,disturbance,atya lanipes,xiphocarts elongata,macrobrachium carcinus,epilobocera sinvatifrons,freshwater shrimp, decapods, streams, invertebrates

LEF LTER OFFICIAL KEYWORDS (See table): EL VERDE, Q PRIETA, HEADWATER STREAM , TABONUCO, DISTURBANCE, COLONIZATION, DECAPODS, PEER REVIEWED JOURNAL

PUBLICATIONS:
Covich, A. P., T. A. Crowl, C.L. Hein, M.J. Townsend and W. McDowell. 2009. Predator–prey interactions in river networks: comparing shrimp spatial refugia in two drainage basins. Freshwater Biology 54: 450-465.

Kikkert D.A., T.A. Crowl, and A.P. Covich. 2009. Upstream migration of amphidromous shrimps in the
Luquillo Experimental Forest, Puerto Rico: temporal patterns and environmental cues. J. N. Am. Benthol. Soc. 28(1):233-246.

Covich, A. P., T. A. Crowl, S. L. Johnson, D. Varza, and D. Certain. 1991. Post-Hurricane Hugo increases in atyid shrimp abundances in a Puerto Rican montane stream. Biotropica 23:448-454

Johnson, K.H., K.A. Vogt, H.C. Clark, O.J. Schmitz and D.J. Vogt. 1996. Biodiversity and the productivity and stability of ecosystems. Trends in Ecology and Evolution 11:372-377

Covich, A.P., T.A. Crowl, S.L. Johnson, and M. Pyron. 1996. Distribution and abundance of tropical freshwater shrimp along a stream corridor: Response to disturbance. Biotropica 28:484-492

DISSEMINATION: UNRESTRICTED

REASONS TO RESTRICT DATA IN THIS DATA SET BEYOND ITS TWO YEAR POLICY PERIOD*:

*WILL HAVE TO BE APPROVED BY LTER PRINCIPAL INVESTIGATORS: N. BROKAW, A. LUGO

SITES DESCRIPTIONS: El Verde Study Area, Pool 0, Elevation 330 m, Quebrada Prieta (on Ox-cart Trail)

Geographical positional system (GPS) Coordinates for each location:
location latitude longitude
Pool 0 in Quebrada Prieta (on Ox-cart Trail)    
Pool 8 in Quebrada Prieta (On Odum Trial about 200 meters upstream the Ox-cart Trail)    
Pool 15 in Quebrada Prieta (the upstream pool in the Q. Prieta)    

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in which the variable appears)

1-6 1-6 1-6 1-6 1-6 1-6 4-6 4-6

ABBREVIATION (as it appears on the data file)

 YR MN POOL ATYACPUE  XIPHCPUE MACCPUE
SAMPLENUM
WEEK

NAME OF VARIABLE

Year of observation Month of observation Pool in the Quebrada Atya lanipes per trap Xiphocaris elongata per trap Macrobrachium per trap Sample Number Week Number

DEFINITION OF VARIABLE

The year in which the observation was performed. Record is missing when data is missing. An integer representing the month of the year   A number representing a long-term pool in the Quebrada Prieta Total number of freshwater Atya lanipes shrimps captured divided by the number of traps from the corresponding pool in the Quebrada Prieta and then released. Number of traps in each pool can vary but usually are 34, 3, and 2 for Pools 0, 8 , and 15, respectively. Record is missing when data is missing. Total number of freshwater Xiphocaris elongata shrimps captured divided by the number of traps from the corresponding pool in the Quebrada Prieta and then released. Number of traps in each pool can vary but usually are 34, 3, and 2 for Pools 0, 8 , and 15, respectively. Record is missing when data is missing. Total number of freshwater Macrobrachium shrimps captured divided by the number of traps from the corresponding pool in the Quebrada Prieta and then released. Number of traps in each pool can vary but usually are 34, 3, and 2 for Pools 0, 8 , and 15, respectively. Record is missing when data is missing.. Sequential number of sampling since January 1993 to present. Number of the week of the year when sampling was performed.

UNIT

      number number number number number

PRECISION

               

RANGE OR LIST OF VALUES

 1988, ..., 2008

1 = January, 2 = February, 3 = March, 4 = April, 5 = May, 6 = June, 7 = July, 8 = August, 9 = September, 10 = October, 11 = November, 12 = December

0, 8, 9, 15         1, ..., 52

DATA TYPE

integer integer integer integer integer integer integer integer

MISSING DATA CODES

               

COMPUTATIONAL METHODS:  
Variable Name Formula
   

FOR DATA MANAGER USE ONLY


DATE OF LAST REVIEW: April 28, 2009
DATE OF LAST ENTRY: December 2008
STAGE OF DATA SET MANAGEMENT (dates):
RECEIVED ENTERED: 3/5/1997
FILED ON-LINE: 4/28/1997
REVIEWED BY RESEARCHER
FILING MEDIA:
NAME OF DOCUMENTATION FILE: covitodd.htm
NAME OF ON - LINE CATALOG: LTERDBAS
RECORD #: 54
DOCUMENT TYPE: data set (magnetic media)
PRIORITY TO BE ENTERED: N/A

  Rev. date of this form: 15 July 2001