The nucleator techniques have specific and very particular functions, helping the reoccupation of some animals in the area, besides the natural succession. The objective of this study was to evaluate the use of the nucleator techniques of artificial perches and branch windrowing for the establishment of forest restoration in a seasonally dry tropical forest, Brazil. The research was conducted at Experimental Farm Cachoeira de São Porfírio, municipality of Santa Luzia, Paraíba, Brazil, in the period from August 2017 to July 2018. Two nucleator techniques were used, the artificial perches and branch windrowing. For both, the randomized block design was employed, with five treatments composed of the spacing between the structures that composed the respective techniques (5x5m; 10x10m; 15x15m; 20x20m and control treatment), in four repetitions. For the artificial perches the number of seeds and excreta were evaluated, and for the branched perches the height of the branches and their decomposition over time was evaluated. in addition, the water content and temperature of the soil in the experimental area were also analyzed. The artificial perches provided insertion of seeds distributed in three botanical families and excreta to the degraded area, thus incorporating organic matter and enriching the seed bank of the experimental site. The largest site. The largest number of excreta was obtained on perches with greater distance between them, proving that the spacing of 15x15m is the most suitable. The volumes of branches were altered throughout the experimental period, with a faster decomposition of the branches in the control treatment compared to the other treatments, and their cover provided lower temperatures compared to soil exposed to full sun. Both techniques have high potential for forest restoration in degraded areas in seasonally dry tropical forests.

The suppression of native vegetation due to inadequate practices has contributed to the non-survival of many plant species, resulting in the loss of the genetic heritage of the Caatinga flora. However, their growth and establishment can be improved by the presence of arbuscular mycorrhizal fungi (AMF), a symbiotic association formed by plant roots and soil fungi that helps seedlings to increase nutrition and tolerance to water deficit, a common situation in stressful environments such as the Caatinga. This review aimed to discuss the importance of mycorrhizal fungi in the development and conservation of native species of the Caatinga that live under water stress, highlighting the effects caused by arbuscular mycorrhiza, its importance for conservation and mechanisms of plant adaptation to stress. The research sought to gather data from articles and journals with the help of key words indexed in Science Direct, Scientific Eletronic Library Online (SciELO), on the Google Academic platform and in the Catalog of Theses and Dissertations of the Coordination for the Improvement of Higher-Level Person (Capes). The results indicate that the inoculation of arbuscular mycorrhizal fungi through root growth can increase the absorption of water and nutrients, assisting in the development of local plants of the Caatinga that live under stress, contributing to the structure of the plant community and the functioning of the natural ecosystem. As research on this subject is still scarce, it is necessary to disseminate research on this subject in order to obtain a wider range of information.