Temporal edge effects structure the assemblages of Drosophilidae (Diptera) in a Restinga forest fragment in Southern Brazil

Abstract

Anthropogenic habitat fragmentation directly affects ecological processes, leading to negative biodiversity impacts for insects and other biota. Increased edge effects are one consequence of fragmentation, and may alter the composition or abundance of species in the remaining habitat fragments. Understanding the ways in which edge effects impact upon the biota is essential for conservation decision-making in fragmented landscapes. Therefore, the aim of this study was to analyze the seasonal patterns of abundance, richness, and composition of Drosophilidae in a Restinga forest fragment in the extreme south of Brazil, as a function of the distance from the edge to the interior of the fragment. The data were analyzed using SIMPER analyses, which showed that the edge and the forest interior were most dissimilar during winter, followed by spring, autumn and summer. An NMDS and the SIMPER analyses showed that the lower dissimilarity between the edge and interior in spring, autumn and summer, compared to winter, is driven by immigration of individuals from outside of the forest fragment. Furthermore, some species were asymmetrically distributed in the fragment, with some species restricted to the edge of the fragment and others to the interior. This information aids in the understanding of the functioning and dynamics of fragmentation, which is fundamental for the maintenance and integrity of environments and their fauna.

Diversity and community structure of Drosophila (Hexapoda, Diptera) in post‐mining sites under different forest restoration techniques in the Brazilian Amazon

“…Traps with attractive bait contained banana fermented for 48 hours in 100 g portions and the traps were exposed for 48 hours in order to capture frugivorous drosophilids (Martins et al 2008). This exposure time is in agreement with other studies for surveying drosophilids (Martins 1987; de Medeiros & Klaczko 2004; Penariol et al 2008; Coutinho‐Silva et al 2017; Mendes et al 2017, 2021; Duarte et al 2018), as well as effects of the loss of bait attractiveness after 48 hours (Nascimento et al 2014). After this period, the collected drosophilids were removed from the traps with a mechanical sucker and stored in 96% alcohol and individualized by traps.…”

Macrofauna Epiedáfica Associada a Solos Submetidos a Diferentes Usos

“…Resultados semelhantes foram reportados por , havendo correlação positiva entre as famílias de Diptera e os elevados teores de matéria orgânica do solo. Mendes et al (2021), destacam a sensibilidade da família Drosophilidae as alterações antrópicas e sua utilização como bioindicadores do ambiente. Desta forma, pode-se sugerir que entre os diferentes agroecossistemas amostrados, a espessa camada de serrapilheira presente proporcionou umidade e fonte de alimento favorecendo a população de dípteros.…”

DIFERENTES MÉTODOS DE SUPERAÇÃO DE DORMÊNCIA DE Adenanthera pavonina L. (Tento-Carolina)

“…Sobre essa verificação, , afirmam que eles estão relacionados aos elevados teores de matéria orgânica do solo. Além disso, Mendes et al (2021), destacam ainda que a espessa camada de serapilheira presente proporciona umidade, bem como uma fonte de alimento favorecendo a população de dípteros. Acerca da Ordem Annelida para que, a partir dos dados aqui contidos, sejam efetuadas ações ambientais no interior do campus, em salas de aula, setores administrativos e laboratoriais, além de verificar se essas comunidades se adaptaram aos novos habitats ofertados pelas modificações antrópicas, além da interferência dos períodos sazonais, chuvoso e seco.…”