Formigas Em Ambientes Urbanos Da Região Noroeste Do Rio Grande Do Sul

Abstract

Formigas que ocorrem em áreas urbanas têm sido foco de estudos nosúltimos anos. Contudo, a mirmecofauna de muitas regiões ainda permanecedesconhecida. O objetivo deste estudo foi avaliar a riqueza e a abundânciadas assembleias de formigas que ocorrem em ambientes urbanos da regiãonoroeste do Rio Grande do Sul. Foram amostradas cinco cidades da região emdois tipos de ambiente: praças e terrenos baldios. Amostras foram obtidasentre os meses de fevereiro e maio de 2018, utilizando-se iscas de glicose esardinha e coleta manual. Foram amostradas 9.772 espécimes de formigas,registradas 468 ocorrências, identificadas 57 espécies, pertencentes a19 gêneros e cinco subfamílias. Os gêneros mais ricos foram Pheidole(S = 13), Linepithema (S = 7) e Camponotus (S = 6). Este trabalho contribuipara o conhecimento das assembleias de formigas em ambientes urbanos edos impactos que a antropização exerce sobre a biodiversidade.

Fatores associados à ocorrência de formigas em escolas urbanas

“…The diversity of ants resembles the results found by Lutinski et al (2014), who investigated the ant fauna in 30 urban school's outer area located in ten cities in the same region. The assemblies regarding the richest and most abundant subfamilies and genders corroborated the Lutinski et al (2014) and Roani et al (2019) findings. In schools of Chapecó municipality (S7-S12), we recorded the highest values of richness and abundance, with emphasis on abundance of species of the genus Pheidole, Solenopsis and Camponotus.…”

“…Ant richness found in schools is representative when compared to other studies carried out in urban environments, conducted in the same region (LISE; GAR-CIA; LUTINSKI, 2006;LUTINSKI et al, 2014;SCHWINGEL et al, 2016;NEVES et al, 2019;ROANI et al, 2019).…”

“…Ants of this genus are considered habitat specialists and their occurrence is associated with the presence of vegetation (MARTINS et al, 2011;FEITOSA, 2015). Pseudomirmecine ants are frequently recorded in samples in the southern region of Brazil (LUTINSKI et al, 2017a;LUTINSKI et al, 2018a;LUTINSKI et al, 2018b), including urban environments (NEVES et al, 2019;ROANI et al, 2019). Ants of this genus forage in vegetation and are predators of small invertebrates (FEITOSA, 2015).…”

“…Ants' activities are regulated by climatic factors, especially temperature (HÖLLDOBLER; WILSON, 1990). In the southern region of Brazil, samples taken in seasons with higher temperatures (spring and summer) allow greater richness and abundance (ROANI et al, 2019). Therefore, these parameters can be maximized with samples obtained under such conditions.…”

Ant diversity (Hymenoptera: Formicidae) in Turvo State Park, municipality of Derrubadas, state of Rio Grande do Sul, Brazil

“…Ant diversity (Hymenoptera: Formicidae) in Turvo State Park, municipality of Derrubadas, state of Rio Grande do Sul, Brazil known (Ulysséa et al, 2011;Diehl et al, 2014;Dröse et al, 2017;Lutinski et al, 2017;Dröse et al, 2019), there are still unsampled areas. In the northwest region of Rio Grande do Sul, ants have already been sampled in rural and forested environments (Cantarelli et al, 2015;Rizzotto et al, 2019) as well as in urban environments (Roani et al, 2019). The Turvo State Park is one of the largest Conservation Units in the southern region of Brazil and the ant fauna that occurs in this environment remains unknown.…”