Diversity and Structure of Miombo Woodlands in Mozambique Using a Range of Sampling Sizes  

作　　者：Noe dos Santos Ananias Hofigo Frederico Dimas Fleig 

机构地区：[1]Department of Forest Engineering, Faculty of Agronomic Engineering and Forestry, Zambeze University, P.O. Box 49, MocubaDistrict, Zamb~zia Province, Mozambique [2]Department of Forest Sciences, Centre of Rural Sciences, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul,P.O. Box 97105-900, Brazil

出　　处：《Journal of Agricultural Science and Technology(B)》2015年第10期679-690,共12页农业科学与技术（B）

摘　　要：Forest assessments are essential to understand the tree population structure and diversity status of forests and to provide information for biodiversity recovery planning. Unfortunately, the majority of Miombo woodlands in Mozambique lack of inventory data, and consequently are often insufficient for management. This study aimed to assess the species richness, diversity and structure of Miombo woodlands using a range of sampling sizes in Mocuba district, Mozambique. Plant inventory was carried out in 128 systematically selected sample plots in 71.6 ha, which was divided into eight treatments, i.e., TI： 0.1 ha; T2：0.25 ha; T3：0.375 ha; T4：0.5 ha; T5：0.625 ha; T6：0.75 ha; T7：0.875 ha; T8：1.0 ha, with 16 repetitions. All stems _〉 10 cm diameter at breast height, and species name to evaluate the floristic composition, richness of tree species, diversity and diameter distribution were recorded. A total of 36,535 individuals were recorded, belonging 124 species, 83 genera and representing 31 botanical families. The most important species was the Brachystegia spiciformis Benth. and the richest botanical family was Fabaceae. The forest showed an average of 517 ＋ 85 trees/ha, and high species diversity and evenness. Analysis of covariance shows that the intercepts and slope of exponential function for diameter distribution are not significantly different for the eight treatments. Compared with the entire composite forest, inventory means were accurately estimated and size class distributions were well represented for plots 〈 0.25 ha, for selecting an efficient sampling design suited to forest characteristics and the inventory＇s purpose.

关 键 词：Floristic composition sampling units species diversity size class distribution Miombo woodlands. 

分 类 号：S[农业科学]