An annotated vascular flora and floristic analysis of the southern half of the Nature Conservancy Davis Mountains Preserve, Jeff Davis County, Texas, U.S.A.

Autores/as

  • Jeffrey James Keeling Sul Ross State University

DOI:

https://doi.org/10.17348/jbrit.v11.i2.1091

Palabras clave:

Chihuahuan Desert, Texas, Davis Mountains, vascular flora, floristics, sky islands

Resumen

La Reserva de Conservación de la Naturaleza Davis Mountains (DMP) está localizada 24.9 mi (40 km) al noroeste de Fort Davis, Texas, en la región noreste del desierto de Chihuahua y consta de alguna de las más complejas topografías delas Montañas Davis, incluyendo la más alta, Mount Livermore, a 8378 ft (2554 m). El ecosistema frío, templado, “sky island” provee de los requerimientos que se necesitan para acomodar un amplio rango de diversidad único, endemismo, y patrones de vegetación, que incluye herbazales de desierto y sabanas montanas. El presente estudio comenzó en mayo de 2011 y pretendía catalogar la flora vascular completa de los 18,360 acres de la Nature Conservancy al sur de la autopista 118 y rodeando directamente Mount Livermore. Se presentan las investigaciones botánicas previas, así como las relaciones biogeográficas de la flora. Los números de las búsquedas en herbarios y de recolecciones de campo recientes combinan un total de 2,153 especímenes testigo, que representan 483 especies y categorías infraspecíficas, 288 géneros, 87 familias. Las familias mejor representadas son Asteraceae (89 especies, 18.4% del total de la flora), Poaceae (76 especies, 15.7% del total de la flora), and Fabaceae (21 especies, 4.3% del total de la flora). El presente estudio representa 25.44% de incremento en especímenes testigo y un 9.7% de incremento en especies conocidas del área de estudio de 18,360 acres y describe cuatro especies endémicas y catorce exóticas (cuatro invasivas) de la propiedad. El análisis subsecuente de los resultados, comparado con los catálogos previos de la flora regional, presenta la flora de DMP como única para las altas elevaciones y substratos ígneos del oeste de Texas y el norte del Desierto de Chihuahua. Múltiples influencias de las ecorregiones que se solapan y de las vecinas, que incluyen las provincias Great Plains, Madreanas, y Sonoraena, se ve que tienen grados variables teniendo en cuenta el modelado de la vegetación en los tiempos presentes.

Citas

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Publicado

2017-11-29

Cómo citar

Keeling, J. J. . (2017). An annotated vascular flora and floristic analysis of the southern half of the Nature Conservancy Davis Mountains Preserve, Jeff Davis County, Texas, U.S.A. Journal of the Botanical Research Institute of Texas, 11(2), 563–618. https://doi.org/10.17348/jbrit.v11.i2.1091

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FLORÍSTICA, ECOLOGÍA Y CONSERVACIÓN