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 |
|
|
Eda C. Melendez-Colom |
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 |
|
|
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 |
| 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 | |
| Freshwater bi-annual shrimp data from Pool 15 in Quebrada Prieta since 1988 | ShrimpinPool-15-bianual.txt | January 1, 1988 | weekly | November 30, 2008 | |
| Freshwater weekly shrimp data from Pool 0 in Quebrada Prieta since 1988 | ShrimpPool-0-weekly.txt | January 1, 1993 | weekly | December 31, 2008 | |
| Freshwater weekly shrimp data from Pool 8 in Quebrada Prieta since 1988 | ShrimpPool-8-weekly.txt | January 1, 1993 | weekly | December 31, 2008 | |
| 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 | |
|
|
| Xiphocaris elongata | |
|
|
| Atya lanipes | |
|
|
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 |
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 |
W: (435)797-2498; |
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) |
|
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 |
|
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 |
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