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 0,1), (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 Allan
Covich for the use of this data file.
| Data File No. | Data File Identifier | On-Line Filename | Starting Date | Periodicity of sample | End Period |
|
|
Freshwater shrimp from the Quebrada Prieta since 1988 | ShrimpopinQPrieta.txt | January 1, 1988 | Six times annually (bimonthly) | December 31, 2005 |
RESEARCH LOCATION: El Verde Study Area, Pool 0, Elevation 330 m, Quebrada Prieta (on Ox-cart Trail)
INVESTIGATORS:
PRINCIPAL INVESTIGATORS E-MAIL address
| Alan Covich | alanc@cnr.colostate.edu |
|
Todd Crowl |
OTHER RESEARCHERS E-MAIL address
CONTACT PERSONS E-MAIL address Phone Number (Include area code)
|
Todd Crowl |
(801)797-2498 h: (801)563-5095 |
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, 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: J. ZIMMERMAN, A. LUGO , D.J. LODGE
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 |
| Quebrada Prieta (on Ox-cart Trail) (Pool 0 |
|
FILE NAME OR #ABOVE (all in which the variable appears) |
1 | 1 | 1 | 1 |
|
ABBREVIATION (as it appears on the data file) |
YR | PERIOD | TOTATYA | TOTAXIPH |
|
NAME OF VARIABLE |
Year of observation | Period of observation | Total of Atya lanipes | Total of Xipho. elongata |
|
DEFINITION OF VARIABLE |
the year in which the observation was performed | One of six periods in a year, representing a two month range when the shrimp are sampled | Number of freshwater Atya lanipes shrimps captured from the Quebrada Prieta and then released. | Number of freshwater Xiphocaris elongata shrimps captured from the Quebrada Prieta and then released. |
|
UNIT |
N/A | N/A | N/A | N/A |
|
PRECISION |
N/A | N/A | N/A | N/A |
|
RANGE OR LIST OF VALUES |
{1988, ...} |
1 = January-February, 2 = March-April,
|
||
|
DATA TYPE |
integer | integer | integer | integer |
|
MISSING DATA CODES |
record missing | record missing | record missing | record missing |
VARIABLES (ATTRIBUTES):
|
FILE NAME OR #ABOVE (all in which the variable appears) |
1 | 1 |
|
ABBREVIATION (as it appears on the data file) |
TOTAMAX | TOTSHRIMP |
|
NAME OF VARIABLE |
Total of Macrobrachium s. | All shrimp (sum) |
|
DEFINITION OF VARIABLE |
Number of freshwater Macrobrachium species shrimps captured from the Quebrada Prieta and then released. | Number of all shrimps captured from the Quebrada Prieta and then released. |
|
UNIT |
N/A | N/A |
|
PRECISION |
N/A | N/A |
|
RANGE OR LIST OF VALUES |
||
|
DATA TYPE |
integer | integer |
|
MISSING DATA CODES |
record missing | record missing |
COMPUTATIONAL METHODS:
| Variable Name | Formula |
DATE OF LAST REVIEW:
January 24, 2008
DATE OF LAST ENTRY: March 1997
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