ABSTRACT

The quantity and quality of plant residue deposited on the soil and the size of the canopy are conditioning factors for edaphic fauna, mainly due to changes in temperature, soil cover and the supply of food resources. Thus, according to their genetic characteristics, plant species can influence the abundance and diversity of soil invertebrates in different ways. Therefore, the objective of this work was to evaluate the influence of different provenances of Spondia tuberosa on the edaphic mesofauna community. The experimental area is located in the municipality of Contendas do Sincorá, Bahia, Brazil, and is composed of five different provenances of Spondias tuberosa. Mesofauna sampling was performed using the modified Berlese-Tullgren funnel method. The provenances did not influence the total density or richness of the mesofauna. However, it was possible to observe changes in the diversity indexes and in the relationship between mesofauna and dendrometric variables. The Lontra-Minas Gerais provenance (L) provided greater evenness between the mesofauna groups among the studied provenances. Together with América Dourada-Bahia (AD), this provenance favored the occurrence of detritivorous organisms, while Livramento de Brumado-Bahia (LB) and Macaúbas-Bahia (M) provide more conducive microhabitats to the occurrence of a greater number of the edaphic mesofauna groups. Thus, L and AD can optimize biological processes such as organic matter decomposition and nutrient mineralization, while L, LB and M can be more favorable to the overall biological health of the soil. These differences should be taken into account when choosing Spondias tuberosa provenances, since they can determine changes in biological processes and soil function, especially in semi-arid climate conditions.

摘要

沉积在土壤上的植物残体的数量和质量以及冠层的大小是土壤动物群的调节因素，主要是由于温度、土壤覆盖和食物资源供应的变化。因此，根据它们的遗传特征，植物物种可以以不同的方式影响土壤无脊椎动物的丰度和多样性。因此，这项工作的目的是评估Spondia tuberosa的不同来源对土壤中底动物群落的影响。试验区位于巴西巴伊亚州 Contendas do Sincorá 市，由五个不同产地的块茎芋组成. 使用改良的 Berlese-Tullgren 漏斗法进行中底动物采样。起源并不影响中型动物的总密度或丰富度。然而，可以观察到多样性指数的变化以及中型动物和树木测量变量之间的关系。Lontra-Minas Gerais 种源（L）在所研究的种源中提供了中型动物群之间更大的均匀性。与 América Dourada-Bahia (AD) 一起，这种起源有利于食腐生物的出现，而 Livramento de Brumado-Bahia (LB) 和 Macaúbas-Bahia (M) 为更多的泥栖中型动物群的出现提供更有利于微生境团体。因此，L和AD可以优化有机物分解和养分矿化等生物过程，而L，LB 和 M 可以更有利于土壤的整体生物健康。选择时应考虑这些差异Spondias tuberosa种源，因为它们可以确定生物过程和土壤功能的变化，尤其是在半干旱气候条件下。