Impacto del fuego en los patrones espaciales de especies arbóreas en un bosque de Miombo en la provincia de Huambo (Angola)
Resumo
R E S U M E N
Para evaluar el impacto del fuego en los patrones de distribución espacial de las especies arbóreas en el bosque Miombo de la Estación Experimental Chianga en la provincia de Huambo en Angola, se analizaron los patrones de agregación espacial y las relaciones interespecíficas de las 5 especies más frecuentes: Monotes dasyanthus, Psorospermum mechowii, Hymenocardia acida, Brachystegia tamarindoides y Albizia antunesiana, en dos hábitats bajo diferentes condiciones de manejo, uno con incendios moderados y otro sin incendios. Para analizar los patrones espaciales en las dos parcelas, utilizamos el software estadístico "Programita" basado en la función de segundo orden de Ripley K, tanto en su forma modificada L (r) como en su variante O (r) a partir de las posiciones mapeadas de puntos, en el recuento acumulado de individuos presentes en un radio creciente desde cada uno de los puntos del patrón espacial, se aplicó metodología de dos formas distintas: univariante y bivariante. Los resultados mostraron que, en general, el patrón agregado fue el más verificado en el estudio, generalmente resultando en una relación competitiva, aunque en ciertos momentos algunas especies han mostrado relaciones facilitadoras y repulsivas. Se concluye en este estudio, que las intensidades de los incendios ocurridos en el miombo de Chianga no fueron perjudiciales para las especies arbóreas estudiadas, y se recomienda aplicar fuego en el miombo de Chianga como elemento de manejo forestal, siempre que sea en régimen de intensidades intermedias y frecuencias controladas, por su papel en la renovación forestal y el mantenimiento de especies.
Palabras-Claves: fuego, miombo, especies, patrones espaciales
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Direitos autorais 2021 Euclides Januário Siquilile
Meio Ambiente (Brasil) | ISSN: 2675-3065
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