Ocorrência e especificidade de ervas-de-passarinho em uma área de sucessão secundária no Parque Estadual Sumaúma, Manaus, AM

Abstract

The studies on areas in process of ecological succession are relevant, since they are natural laboratories, capable of generating important information to the understanding of the successional dynamics in degraded areas. Hemiparasite plants are a key group for ecological studies, since they can modify the structure and dynamics of a biological community, altering the allocation of resources of the parasitized species. Host specificity in parasitic plants is an important factor in the study of the group. This study tried to verify the occurrence and specificity of parasite plants in an area of secondary succession, Manaus, AM, Brazil. The study was developed in an area of secondary succession in Sumaúma State Park, Manaus, AM. The field activities took place from August 14, 2016 to August 26, 2017. Four plots were set up measuring 20 m x 5 m, at the edges and one measuring 20m x 20m in the central area, total area of 800 m2, using colored tape to identify the plots and the number of the individual infested (ex: T 1). It was identified the occurrence of four species of parasite plants. Hemiparasite Atidaphne amazonenses (N = 121) occurred in all host plants, being more frequent in Vismia cayennensis and Vismia guianensis, due to the high availability of these hosts (N = 50), but without specificity. The other Passovia stelis, Oryctanthus florulentus, Cladocolea micrantha parasites also did not present host specificity. The host species were also recorded: Vismia cayennensis (Jacq.) Pers, Vismia guianensis (Aubl.) Pers., Miconia alata (Aubl.) DC., Piper aduncum L., Anacardium occidentale L., Palicourea longiflora, Clidemia rubra L., Spermacoce capitata Ruiz & Pav., Inga sp.