Population Structure and Spatial Delineation of Consumer Communities in the Everglades

Metadata:

• Identification_Information
• Data_Quality_Information
• Metadata_Reference_Information

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:

<http://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 <http://sofia.usgs.gov/metadata> to be sure you have the most recent version.

U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather Henkel - Webmaster
Generated by mp version 2.8.18 on Mon Nov 08 10:57:16 2010