Conservation Partners connecting working lands conservation from the Gulf of Mexico to the High Plains with the vision of a sustainable landscape of natural resources resilient to the threats and stressors associated with our changing world.

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Conservation Coordinator 

GCP LCC Webinar: Update - Quantification of Alligator Gar Recruitment Dynamics Using a River-Stage Specific Floodplain Inundation Model

Date/Time: 12:00 PM, 3/1/2017


This webinar was presented on March 1, 2017

View the recorded Alligator Gar webinar update


Conservation & Management Challenges:

Alligator Gar, Atractosteus spatula, is an iconic species native to lowland floodplain river systems where they play an important role as top predators and by linking landscapes through their movement. Alligator Gar is also an important native fisheries species in the Trinity River, and is a species of concern in most of the states where it occurs naturally.  Disruption of river-floodplain connectivity is implicated in declining populations of Alligator Gar across much of its range.  Successful management and conservation of Alligator Gar populations will be aided by an understanding of the relationship between flow and recruitment, particularly the availability and suitability of off-channel habitats utilized by this species for reproduction.


Research Overview:

This project will identify potential Alligator Gar spawning areas in floodplain reaches of the lower Trinity River and model the amount and quality of inundated floodplain habitat during the spawning season to Alligator Gar year-class strength (i.e. recruitment).  The model will be validated through actual quantification of floodplain inundation using remote imagery and field observations as well as field collection of young-of-year Alligator Gar following suitable flood pulses.



Dr. David Hoeinghaus, Associate Professor, Department of Biological Sciences and the Advanced Environmental Research Institute, University of North Texas. David’s research focuses on fish population and aquatic community ecology, with special interest in floodplain river systems and flow regimes.

Dr. Jennifer Jensen, Associate Professor, Department of Geography, Texas State University.
Jennifer’s teaching and research focuses on implementing geospatial technologies including remote sensing, GPS, and GIS to address Earth System Science questions with an emphasis on vegetation composition and structure and landscape ecology.   She earned her PhD in Environmental Science in 2009 from the University of Idaho.