Communities of predatory mites (Phytoseiidae and Stigmaeidae) in different environments of the Brazilian Pampa

Maicon Toldi (1) , Elisete Maria de Freitas (1) , Vinícius Leão da Silva (1) , Monique Caumo (2) , Júlia Jantsch Ferla (3) , Carla Roberta Orlandi (1) , Tairis Da-Costa (2) , Liana Johann (1) , Noeli Juarez Ferla (1)

1 UNIVATES - Universidade do Vale do Taquari
2 UFRGS - Universidade Federal do Rio Grande do Sul [Porto Alegre]
3 UFV - Universidade Federal de Viçosa = Federal University of Viçosa

The Brazilian Pampa presents a high diversity of fauna and flora within a mosaic of environments. The aim of this study was to evaluate the assemblages of predatory mites (Phytoseiidae and Stigmaeidae) in three different Pampa environments: Grassland shrub vegetation, Grazing Exclusions fenced for six years and Riparian Forest with tree vegetation. Phytoseiidae and Stigmaeidae were evaluated with a total of 324 plant sampled from nine sites in three environments. Twenty-two Phytoseiidae species and six Stigmaeidae species were found. Riparian Forest presented the highest abundance of predatory mites (243) and the greatest species diversity. Mites were more abundant in Grazing Exclusions (64) than in Grassland (25) environments, but species diversity was similar. In Riparian Forest, the most abundant species were Amblyseius tamatavensis Blommers, Amblyseius herbicolus (Chant) and Agistemus floridanus González-Rodríguez. Arrenoseius gaucho Ferla, Silva and Moraes and Zetzellia malvinae Matioli, Ueckermann and Oliveira were the most abundant in Grassland environment. Our results demonstrate that the Brazilian Pampa has a high diversity of predatory mites and mite communities seem to be affected by the type of environment, showing the importance of this ecosystem as a reservoir of natural enemies.

Mots clés: Animalia; Arthropoda; Acari; Aacriformes; forest; grassland; natural environment; Phytoseiidae; Stigmaeidae

Domaines: Biodiversité et Ecologie; Zoologie des invertébrés

Maicon Toldi, Elisete Maria de Freitas, Vinícius Leão da Silva, Monique Caumo, Júlia Jantsch Ferla, et al.. Communities of predatory mites (Phytoseiidae and Stigmaeidae) in different environments of the Brazilian Pampa. Acarologia, 2021, 61 (1), pp.20-30. ⟨10.24349/acarologia/20214413⟩. ⟨hal-03110422⟩