Riverscape Ecology Lab
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Riverscape Ecology Lab
at Texas A&M University

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Joshuah Perkin, PhD
Principal Investigator

Ecology and Conservation Biology Department
Ecology and Evolutionary Biology Program
Texas A&M University
Room 222, WFES Building
2258 TAMU, College Station, Texas 77845
Email: jperkin at tamu.edu; Office: 979-458-1814
​GoogleScholar: HERE
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Tomasz Koralewski, PhD
Associate Research Scientist​

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Hayden Roberts
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Ph.D. Candidate

Ecology and Conservation Biology Program

Dissertation:
The Conundrum of Carpiodes: Genetic, Morphological, Spatial, and Isotopic relationships of Putative Llano River Carpsucker (Carpiodes cf. sp. carpio) inhabiting Texas Hill Country Streams
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Jake Barrett (webpage)
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Ph.D. Candidate

Ecology and Conservation Biology Program

Dissertation:
Fish movement ecology as a metric for measuring ecological responses to riverscape restoration​
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Tom Dodson
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Ph.D. Candidate

Ecology and Evolutionary Biology Program

Dissertation:
Assessing seasonal dynamics of stream fish assemblages to advance ecology and conservation biology​
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Meghan Booknis
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M.S. Student

​Thesis: Tributary habitat use by Blue Sucker

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Calvin Young
M.S. Student

Thesis: Small scale fish movement to enhance ecological models

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Maddie Nguyen
Undergraduate Research Scholar

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Blake Alexander
Undergraduate Research Scholar


Graduate and Post-Graduate Alumni

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Rose Blanchard (​webpage)
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Earned Ph.D. in REL

Dissertation: Functional ecology and diversification of mosquitofish morphology

Current Position: Assistant Professor Northwest Missouri State University

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Rebecca Mangold
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Earned M.S. in REL

Thesis: Environmental correlates and ecological consequences for long-term fish assemblage change in a regulated river basin

​Current Position: Texas Parks and Wildlife Department Inland Fisheries

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Noah Santee
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Earned M.S. in REL

Thesis: Predicting the effects of global change on fish functional traits and trait-environment relationships

​Current Position: University of Houston - Clear Lake

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Johnathan Ellard
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Earned M.S. in REL

Thesis: Reservoir proximity explains long-term transformation of riverine fish assemblage structure and function

​Current Position: Bryan Texas Utilities
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Zach Steffensmeier
Earned Ph.D. in REL

Dissertation: Spatial ecology of imperiled Great Plains fishes

Current Position: Lecturer in School of Environment and Natural Resources The Ohio State University

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Jake Wolff
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Earned M.S. in REL

Thesis: Hierarchical modeling of Ash Meadows Speckled Dace population dynamics in an isolated desert riverscape

​Current Position: Texas Parks and Wildlife Department Inland Fisheries

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Lindsey Elkins
Earned M.S. in REL

Thesis: Environmental and spatial regulators of fish community structure and population size in semi-arid riverscapes
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Current position: Texas Parks and Wildlife Department Coastal Fisheries
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Erin Nguyen
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Earned Ph.D. in REL

​Dissertation: Flow as a conservation tool for Great Plains Cyprinids
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Hayden Roberts
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Earned M.S. in REL

Thesis: Movement ecology of Alligator Gar across multiple scales and ecotones

Current position: Doctoral Student in Riverscape Ecology Lab
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Matt Acre, PhD
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Former Postdoctoral Research Associate

Project: Conservation and ecology of fishes in the Chihuhuan Desert region of Texas

Current position: Research Scientist United States Geological Survey
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Maximiliaan Claus
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Former Visiting International Research Scholar

​Project: Management perspectives on Alligator Gar

​Current position: Fish Biologist, Bureau Waardenburg BV, Netherlands

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Florian Kappen
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Former Visiting International Research Scholar

Project: Movement ecology of Alligator Gar

Current position: Aquatic Ecologist, Watershap De Dommel, Nehterlands

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Stephanie [George] Parker
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Earned M.S. in REL

Thesis: Conservation Biogeography of Headwater Catfish (Ictalurus lupus) in the United States.
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Juju Wellemeyer
Earned M.S. in REL (TN Tech University)

Thesis: Assembling Fish Community Indicators of Riverscape Threats: How Do Metric Screening Methods Measure Up?​
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Current position: Extension Agent, Kansas State University Research and Extension
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Eric Malone
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Earned M.S. in REL (TN Tech University)

Thesis: Restoring Ecosystem Services by Prioritizing Reintroduction of Native Fishes to Lower Abrams Creek, Great Smoky Mountains
National Park.

Current position: Ecosystem Services Project Manager, New York Department of Environmental Protection
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Amy Gebhard
Earned M.S. in REL (TN Tech University)

Thesis: Environmental Regulators of Banded Sculpin (Cottus carolinae) Demography along a Stream Size Gradient.​
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Current position:  Fisheries Resource Biologist, South Dakota Game, Fish, and Parks

Undergraduate Alumni

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Tim Ringleben (2025-2026)

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Brandon Fernandez (2025)

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Bryce Clements (2024-2025)

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Haley Rivillas (2024-2025)

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Meghan Booknis (2022-2024)

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Davis Stairs (2023-2025)

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Hannah Evans (2022-2024)

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Lucas Stevens (2020-2025)

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Blake Elzi (2023-2024)

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Sam Campassi (2023)

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Jake Wolff (2021-2023)

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Johnathan Ellard (2021-2023)

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Emilee Holderness (2023)

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Rebecca Mangold (2021-2022)

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Wesley Arend (2021-2022)

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Cade Cottar (2021-2022)

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Lauren Yancy (2019-2021)

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Noah Santee (2020-2021)

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Hailey Binkley (2021)

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Brynn Johnson (2021)

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Allison Hay (2020-2021)

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Emily Parker (2020)

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Jake Madewell (2017-2020)

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Fernando Chavez (2017-2020)

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Austin Stafford (2018-2019)
​Publication by Austin: PDF

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Chase Corrington (2017-2019)

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Kylee Ecker (2018-2019)
Publication by Kylee: PDF

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Caleb Blanton (2018-2019)
​Publication by Caleb: PDF

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Mark Nash (2017-2018)

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Stephen Blair (2017-2018)

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Brandon Bransford (2018)

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Josh Hietikko (2017-2018)

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Nick Loveland (2017-2018)

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Shannon Murphy (2016-2017)
Publication by Shannon: PDF

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Tyler Slagle (2016-2017)

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Will Curtis (2015-2017)
​Publication by Will: PDF

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