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Population Structure and Spatial Delineation of Consumer Communities in the Everglades

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
William Loftus (retired)

Joel Trexler (Florida International University)

Publication_Date: 2000
Title:
Population Structure and Spatial Delineation of Consumer Communities in the Everglades
Geospatial_Data_Presentation_Form: poster
Online_Linkage:
<https://sofia.usgs.gov/projects/index.php?project_url=consume_comm>
Description:
Abstract:
The trophic ecology of Everglades fishes is poorly documented. In tropical-fish communities, hydrologic seasonality greatly affects patterns of food-resource use, such as local and long-range movements among habitats, seasonal changes in diets, diet specializations, the presence and seasonality of diet overlaps, etc. (Lowe-McConnell 1975; Winemiller 1989, 1990).

We analyzed Everglades native and introduced fish diets to identify the most important invertebrate and plant prey, and to compare trophic positions of species within and among three habitats and two seasons (Fig. 1). We used the complementary techniques of stomach and stable isotope analysis for both instantaneous and time-integrated views of animal diets (Vander Zanden and Rasmussen 1996).

We then compared diet patterns in the temperate Everglades fish community with those from seasonal aquatic systems in the tropics. We posed the following hypotheses in examining those patterns:

1: Herbivory and omnivory are common trophic states in the Everglades.

2: Seasonal changes in diets within a habitat are usual .

3: Specialization in diet is common; generalists are rare.

4: Diet overlap is highest during high-water periods when food is plentiful.

This study is a first step in using data from across habitats and seasons for use in constructing a empirical food web for the Everglades marsh.

Purpose:
In modeling the dynamics of aquatic animal populations in southern Florida wetlands, the dispersal distances, rates of movements, and timing of movement are important but poorly understood. The small size of the wetland animals precludes the use of standard marking techniques for studying movement, and the large, open system of these wetlands makes recapturing marked animals improbable. Genetic markers, used to determine population structure, offer an indirect way of assessing the degree of movement and mixing in these populations, and the landscape-level patterns of animal movement. In a series of studies in this multi-year project, our objectives are to identify population structure of selected aquatic species in the Everglades and to estimate migration rate from genetic data on gene flow for incorporation in the ATLSS model. Data from studies on whether levee and canal systems act as barriers to dispersal of aquatic animals in the Everglades are applicable to the Restudy. We are also using genetic techniques to learn if populations of introduced Asian Swamp Eels have the same source of origin, thereby establishing whether new collection locations represent dispersal events or new introductions.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1977
Ending_Date: 1997
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -81.25
East_Bounding_Coordinate: -80.3
North_Bounding_Coordinate: 25.75
South_Bounding_Coordinate: 25
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: modeling
Theme_Keyword: biology
Theme_Keyword: fish
Theme_Keyword: aquatic animals
Theme_Keyword: hydroperiods
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme_Keyword: environment
Theme_Keyword: inlandWaters
Theme_Keyword: 002
Theme_Keyword: 007
Theme_Keyword: 012
Place:
Place_Keyword_Thesaurus:
Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, DC, National Institute of Standards and Technology
Place_Keyword: United States
Place_Keyword: US
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, DC, NIST
Place_Keyword: Florida
Place_Keyword: FL
Place:
Place_Keyword_Thesaurus:
Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS 6-3, Washington, DC, National Institute of Standards and Technology
Place_Keyword: Miami-Dade County
Place_Keyword: Broward County
Place:
Place_Keyword_Thesaurus: USGS Geographic Names Information System
Place_Keyword: Everglades National Park
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Central Everglades
Place_Keyword: ENP
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joel Trexler
Contact_Organization:
Florida International University, Department of Biological Sciences
Contact_Address:
Address_Type: mailing address
Address: 11208 S.W. 8th Street
City: Miami
State_or_Province: FL
Postal_Code: 33199
Country: USA
Contact_Voice_Telephone: 305 348-1966
Contact_Facsimile_Telephone: 305 348-4032
Contact_Electronic_Mail_Address: trexlerj@fiu.edu
Data_Set_Credit:
We could not have completed this study without the efforts of Victoria Foster and Jennifer Rehage, who assisted in summarizing the raw data for analysis and in preparing the report and poster. Tom Atkeson, FL Department of Environmental Protection, provided funds that helped to complete the analysis.
Cross_Reference:
Citation_Information:
Originator:
Adams, S. M.

Kimmel, B. L.; Plosky, G. R.

Publication_Date: 1983
Title:
Sources of organic matter for reservoir fish production: a trophic-dynamics analysis
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Canadian Journal of Fisheries and Aquatic Sciences
Issue_Identification: v. 40, n. 9, p. 1480-1495
Publication_Information:
Publication_Place: Ottawa, Ontario, Canada
Publisher: National Research Council Canada
Other_Citation_Details:
accessed as of 11/8/2010

The full article is available via journal subscription or single article purchase. The abstract may be viewed on the website below

Online_Linkage:
<http://rparticle.web-p.cisti.nrc.ca/rparticle/AbstractTemplateServlet?calyLang=eng&journal=cjfas&volume=40&year=0&issue=9&msno=f83-170>
Cross_Reference:
Citation_Information:
Originator: Lowe-McConnell, R. H.
Publication_Date: 1975
Title:
Fish communities in tropical freshwaters: their distribution, ecology, and evolution
Geospatial_Data_Presentation_Form: book
Publication_Information:
Publication_Place: New York, NY
Publisher: Longman, Inc
Cross_Reference:
Citation_Information:
Originator:
Vander Zanden, M. J.

Rasmussen, J. B.

Publication_Date: 1996
Title:
A trophic position model of pelagic food webs: impact on contaminant bioaccumulation in lake trout
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Ecological Monographs
Issue_Identification: v. 66, n. 4, p. 451-477
Publication_Information:
Publication_Place: Washington, DC
Publisher: Ecological Society of America
Other_Citation_Details:
accessed as of 11/8/2010

The full article is available via journal subscription or single article purchase. The abstract may be viewed on the website below

Online_Linkage: <http://www.jstor.org/pss/2963490>
Cross_Reference:
Citation_Information:
Originator: Winemiller, K. O
Publication_Date: 1989
Title:
Otongenetic diet shifts and resource partitioning among piscivorous fishes in the Venezuelan llanos
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Environmental Biology of Fishes
Issue_Identification: v. 26, n.3, p. 177-199
Publication_Information:
Publication_Place: Dordrecht, The Netherlands
Publisher: Springer Netherlands
Other_Citation_Details: accessed as of 11/8/2010
Online_Linkage:
<http://www.springerlink.com/content/m43267581g4g7139/fulltext.pdf>
Cross_Reference:
Citation_Information:
Originator: Winemiller, K. O.
Publication_Date: 1990
Title: Spatial and temporal variation in tropical fish networks
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Ecological Monographs
Issue_Identification: v. 60, n. 3, p. 331-367
Publication_Information:
Publication_Place: Washington, DC
Publisher: Ecological Society of America
Other_Citation_Details:
accessed as of 11/8/2010

The full article is available via journal subscription or single article purchase. The abstract may be viewed on the website below

Online_Linkage: <http://www.esajournals.org/doi/abs/10.2307/1943061>
Cross_Reference:
Citation_Information:
Originator: Winemiller, K. O.
Publication_Date: 1996
Title:
Factors driving temporal and spatial variation in aquatic floodplain food webs
Geospatial_Data_Presentation_Form: book chapter
Publication_Information:
Publication_Place: New York, NY
Publisher: Chapman and Hall
Other_Citation_Details:
in Food Webs: Integration of patterns and dynamics, G. A. Polis and K. O. Winemiller, eds

Data_Quality_Information:
Logical_Consistency_Report:
Each species was separated into arbitrarily chosen size-groups of ~ 25 fish; length and wet mass recorded.
Completeness_Report:
Approximately 4000 specimens of 26 native fishes collected by rotenone, nets, angling, and electrofishing from 1977-1981 were supplemented by 6 introduced species during 1995-1997.
Lineage:
Process_Step:
Process_Description:
Approximately 4,000 specimens of 26 native fishes collected by rotenone, nets, angling, and electrofishing from 1977-1981 were supplemented by 6 introduced species during 1995-1997.

Each species was separated into arbitrarily chosen size-groups of ~ 25 fish; length and wet mass recorded.

Volumes were measured to 0.001ml using a blood-sedimentation tube; volume of digested prey not reconstructed; The small size of food items required the pooling of like items from each size-class of fish for volumetric analysis.

Trophic Classification

We grouped fishes into 5 Trophic Classes using continuous scores (tau symboli ) based on sums of prey scores, multiplied by the proportion of diet comprised by each prey type (Adams et al. 1983; Winemiller 1990).

1 = Mainly Herbivorous, >50% plant material (Score = 1.0 -1.74);

2 = Omnivorous, 25-50% plant material (Score = 1.75-2.19);

3 = Omnivorous, <25% Plant material (Score = 2.20-2.74);

4 = Omnivorous, mostly animal prey (Score = 2.75-2.99);

5 = Predominantly carnivorous, fish and decapods (Score = >3.0).

The results were used to identify the most important invertebrate and plant prey and to compare trophic positions of species among and within 3 habitats (alligator pond, spike rush, and sawgrass) and two seasons (high-water and low-water periods).

Process_Date: 2000
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joel Trexler
Contact_Organization:
Florida International University, Department of Biological Sciences
Contact_Address:
Address_Type: mailing address
Address: 11208 S.W. 8th Street
City: Miami
State_or_Province: FL
Postal_Code: 33199
Country: USA
Contact_Voice_Telephone: 305 348-1966
Contact_Facsimile_Telephone: 305 348-4032
Contact_Electronic_Mail_Address: trexlerj@fiu.edu

Metadata_Reference_Information:
Metadata_Date: 20101108
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 600 Fourth Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext 3028
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: sofia-metadata@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints: none
Metadata_Use_Constraints:
The principal investigator for this project retired and the Point of Contact has declined to provide a review of the information in the metadata record. Any questions about the information should be directed to the Point of Contact under Citation Information or the Process Contact(s).

This metadata record may have been copied from the SOFIA website and may not be the most recent version. Please check <https://sofia.usgs.gov/metadata> to be sure you have the most recent version.


This page is <https://sofia.usgs.gov/metadata/sflwww/consume_comm.html>

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