ABSTRACT
Comprising a natural reserve with 359 ha of "montane forest" inserted on the Brazilian semi-arid, the Parque Ecológico João Vasconcelos Sobrinho (PEJVS), locally known as "Brejo dos Cavalos" is currently under high anthropogenic pressure. A list of 197 species of butterflies belonging to six families is presented, being 59 species of Hesperiidae, 4 of Papilionidae, 18 of Pieridae, 17 of Lycaenidae, 12 of Riodinidae and 87 of Nymphalidae. The butterfly community was composed mainly by widespread species commonly found in open habitats. There were also many species typical of forested areas such as Scada karschina delicata Talbot, 1932 (Danainae: Ithomiini), which is an endangered butterfly.
O Parque Ecológico João Vasconcelos Sobrinho (PEJVS), conhecido localmente como Brejo dos Cavalos, é um fragmento de "mata serrana" de 359 ha inserido no semi-árido brasileiro, e que atualmente encontra-se sobre alta pressão antrópica. Uma lista com 197 espécies de borboletas pertencentes a seis famílias é apresentada, sendo 59 espécies de Hesperiidae, 4 de Papilionidae, 18 de Pieridae, 17 de Lycaenidae, 12 de Riodinidae e 87 de Nymphalidae. A fauna é composta principalmente de espécies de áreas abertas e com ampla distribuição geográfica. Entretanto, diversas espécies típicas de áreas florestadas também estão presentes, uma delas, Scada karschina delicata Talbot, 1932 (Danainae: Ithomiini), é uma espécie de borboleta criticamente ameaçada de extinção.
ABSTRACT
Although seed dispersal by ants might reduce seed predation near the parent plants, predation on discarded seeds clustered on nest refuse piles may reduce any initial benefit provided by seed removal. Here we examine the fate of Croton sonderianus seeds that were discarded by Pheidole fallax Mayr ants on their nest refuses in caatinga vegetation of northeast Brazil. We collected all seeds discarded in refuse piles of 20 nests and within a radius of 50 cm from their borders, and examined them for evidence of predation. A total of 3,017 seeds were recorded either located in the P. fallax refuse piles (89.1 percent) or nest vicinity (10.9 percent). Predation was three fold higher in nest vicinity as compared to refuse piles. By removing seeds from beneath parent plants and relocating then to refuse piles, P. fallax is possibly providing double protection services for C. sonderianus seeds. Our findings represent the first evidence for predator-avoidance as benefit for plants resulting from ant seed-dispersal in the neotropics.