THE IMPACT OF FIRE ON DEN SITE SELECTION OF FLORIDA PANTHERS.

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Bibliographic Details
Title: THE IMPACT OF FIRE ON DEN SITE SELECTION OF FLORIDA PANTHERS.
Authors: XU, WENJING1,2 WENJING.XUUU@GMAIL.COM, CALHOUN, KENDALL L.1, SEROTA, MITCHELL W.1, BLANCO, ALISON3, DEMERS, NORA3, ONORATO, DAVID P.4
Source: Southwestern Naturalist. Dec2025, Vol. 69 Issue 4, p1-16. 17p.
Subjects: Habitat selection, Prey availability, Habitat conservation, Leopard, Biological fitness, Firefighting, Ground vegetation cover
Geographic Terms: Florida
Abstract (English): Fire is one of the most important disturbances and landscape management tools in southern Florida, USA -- an area that encompasses the majority of the remaining habitat for the endangered Florida panther (Puma concolor coryi). Fire may play a critical role in female panther den site selection by modifying vegetation cover and prey density, thereby influencing reproductive success. We aimed to test the hypothesis that time since last fire (TSLF) would influence panther den site selection. We predicted that panthers would select den sites in habitats with an intermediate TSLF (2 ≤ TSLF <5 years) as opposed to areas with longer TSLF ( ≥ 5 years) or recently burned areas (TSLF < 2 years) because an intermediate TSLF may optimize prey accessibility while creating a mosaic of understory vegetation required for denning. Using the combination of a 14-year dataset inclusive of 83 den locations and 20 years of prescribed and wildfire history from public lands in South Florida, we applied a resource selection function framework to examine the effects of TSLF on panther den site selection. While habitats with TSLF ≥ 5 years represented a majority of area than burned habitats within individual panther gestation ranges (period 90-365 days prior to parturition), panthers preferred to establish dens in habitats burned within a 3 ≤ TSLF < 5 years, supporting our hypothesis. Compared to selecting locations with TSLF ≥ 5 years, the odds of a female panther selecting locations in habitats 3 ≤ TSLF < 4 years and 4 ≤ TSLF < 5 years were 2.27 times greater and 2.20 times greater, respectively. Our study suggests that a 3 ≤ TSLF < 5-year fire interval may promote a landscape mosaic that increases den establishment opportunities, thereby assisting in improving prospects for continued recovery of the Florida panther population. [ABSTRACT FROM AUTHOR]
Abstract (Spanish): El fuego es una de las perturbaciones más importantes, y una de las herramientas del manejo del paisaje más usada en el sur de Florida (USA), una zona donde se encuentra la mayoría del hábitat restante de la pantera de Florida (Puma concolor coryi), especie en peligro de extinción. El fuego modifica la cubierta vegetal y la densidad de presas, lo que puede jugar un papel crítico en la selección de madrigueras por las panteras hembras, y por lo tanto afecta el éxito reproductivo. El objetivo de este estudio fue comprobar si el tiempo transcurrido desde que una parcela de hábitat se quemó por última vez (TSLF, por sus siglas en inglés) influiría en la selección de madrigueras por las panteras. Nuestra hipótesis fue que las panteras seleccionarían preferencialmente hábitats con un valor intermedio de TSLF (2 ≤ TSLF< 5 años), en vez de áreas con valores de TSLF mayores (≥ 5 años), o quemadas recientemente (< 2 años). Esta predicción se basa en que un valor intermedio de TSLF optimizaría la presencia de presas, a la vez que proporcionaría un mosaico de vegetación de sotobosque ideal para las madrigueras. Para investigar el efecto de TSLF en la selección de madrigueras, usamos una combinación de datos de 14 años de localización de 83 madrigueras y 20 años de datos de quemas controladas e incendios forestales de terrenos públicos del sur de Florida para hacer un análisis usando una función de selección de recursos. Confirmando nuestra hipótesis, las panteras prefirieron establecer sus madrigueras en hábitats con 3 ≤ TSLF < 5 años, a pesar de que la mayoría del área cercana a las panteras en gestación (calculado con la localización de las madres 90-365 días antes del parto) correspondía a TSLF ≥ 5 años. La probabilidad de que una pantera hembra seleccionase un hábitat con 3 ≤ TSLF < 4, o con 4 ≤ TSLF < 5 años fue 2.27 mayor y 2.20 mayor, respectivamente, que la de que seleccionase un hábitat con TSLF ≥ 5 años. Nuestro estudio sugiere que un intervalo de quemas 3 ≤ TSLF < 5 años puede fomentar un paisaje de mosaico favorable para el establecimiento de madrigueras de la pantera de Florida, lo que mejora las perspectivas para la recuperación de su población. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Fire is one of the most important disturbances and landscape management tools in southern Florida, USA -- an area that encompasses the majority of the remaining habitat for the endangered Florida panther (Puma concolor coryi). Fire may play a critical role in female panther den site selection by modifying vegetation cover and prey density, thereby influencing reproductive success. We aimed to test the hypothesis that time since last fire (TSLF) would influence panther den site selection. We predicted that panthers would select den sites in habitats with an intermediate TSLF (2 ≤ TSLF <5 years) as opposed to areas with longer TSLF ( ≥ 5 years) or recently burned areas (TSLF < 2 years) because an intermediate TSLF may optimize prey accessibility while creating a mosaic of understory vegetation required for denning. Using the combination of a 14-year dataset inclusive of 83 den locations and 20 years of prescribed and wildfire history from public lands in South Florida, we applied a resource selection function framework to examine the effects of TSLF on panther den site selection. While habitats with TSLF ≥ 5 years represented a majority of area than burned habitats within individual panther gestation ranges (period 90-365 days prior to parturition), panthers preferred to establish dens in habitats burned within a 3 ≤ TSLF < 5 years, supporting our hypothesis. Compared to selecting locations with TSLF ≥ 5 years, the odds of a female panther selecting locations in habitats 3 ≤ TSLF < 4 years and 4 ≤ TSLF < 5 years were 2.27 times greater and 2.20 times greater, respectively. Our study suggests that a 3 ≤ TSLF < 5-year fire interval may promote a landscape mosaic that increases den establishment opportunities, thereby assisting in improving prospects for continued recovery of the Florida panther population. [ABSTRACT FROM AUTHOR]
ISSN:00384909
DOI:10.1894/0038-4909-69.4.15