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Centro de Investigaciones Biológicas del Noroeste (CIBNOR) 2015

Estructura, diversidad y perfil fisiológico de la comunidad bacteriana del suelo en las islas de recursos del mezquite amargo (Prosopis articulata S. Watson) en relación con la diversidad de plantas

García Hernández, Diana Edisa

Titre : Estructura, diversidad y perfil fisiológico de la comunidad bacteriana del suelo en las islas de recursos del mezquite amargo (Prosopis articulata S. Watson) en relación con la diversidad de plantas

Auteur : García Hernández, Diana Edisa

Etablissement de soutenance : Centro de Investigaciones Biológicas del Noroeste (CIBNOR)

Grade : Maestría en Ciencias en el Uso, Manejo y Preservación de los Recursos Naturales 2015

Résumé
The Mesquite is a native desert plant with adaptations that allow it to grow in environments where few plants can survive independently. Its role in arid ecosystems is vital for nutrient concentration in patches (resources islands) because it adds favorable fertility conditions under its canopy. It is proposed as a key plant for reforestation of eroded areas and has been successful in experiments. Yet there is little information about diversity of associate soil bacteria in forming and maintaining the resource islands and the bacteria’s role in regulating soil conditions to optimize nutrient uptake by plants. To integrate plant diversity and structure and diversity and physiological profiles of soil bacterial community in an arid area, 18 fertility islands formed under mesquite canopies with different plant diversity and a bare soil as a control were selected. Soil characteristics, structural profile, diversity, and physiological profile of the bacterial community were analyzed. Diversity and structure of non-cultivable soil bacterial communities showed no correlation with the degree of plant diversity ; however, the metabolic capacity to degrade various carbon sources increases with the diversity and richness of plants and is also related to organic matter, electrical conductivity, and soil texture.

Mots Clés : Islas de recursos ; Comunidad bacteriana del suelo ; mezquite

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Page publiée le 20 novembre 2017