septempunctata).ĭiscussion of interactions among predatory species should consider recent documented declines in the abundance and biomass of several arthropod taxa ( Sanchez-Bayo and Wyckhuys 2019, Bell et al. In this review, we examine whether these interactions vary between the native and non-native ranges for specific species (e.g., H. Thus, the range expansion of these predatory species has both negative and positive ecological effects on biodiversity and levels of biological control. The interactions of these two predatory species with native lady beetle species influences community structures and predator–prey dynamics in a wide range of ecosystems, including agroecosystems. 2007, Koch and Galvan 2008, Camacho-Cervantes et al. axyridis in new environments (e.g., Harmon et al. Several papers have discussed the positive and negative effects of C. 2017, CABI Invasive Species Compendium ( ) ( ). Both species are now distributed widely on most continents ( Poutsma et al. and Harmonia axyridis (Pallas), causing significant ecological effects in their new environments ( Obrycki et al. 2018), prominently Coccinella septempunctata L. During the past three decades, several species of predatory Coccinellidae have spread to new continents ( Franzmann 2002, Rebolledo et al. 2017), and several syntheses of the role of coccinellids in biological control ( Powell and Pell 2007, Volkl et al. Various aspects have been reviewed, including trophic ecology ( Lundgren and Webber 2009), invasion ecology ( Roy and Wajnberg 2008, Brown et al. We suggest that future studies focus more attention on the community ecology of these invasive species in their native habitats.Ĭoccinellids have long been considered important biological control organisms ( Obrycki and Kring 1998), but current interest in predatory coccinellid beetles continues to grow. Declines in the abundance of native coccinellids following the spread and increase of non-native species, documented in several multi-year studies on several continents, is a major concern for native biodiversity and the persistence of native coccinellid species. Harmonia axyridis also seems to rely more on cannibalism in times of prey scarcity than other species, and relatively sparse data indicate a lower predation pressure on it from natural enemies of coccinellids. axyridis benefits most from this interaction. Intraguild predation is well documented both in Asia and in newly invaded areas, and H. Studies of these species in their native Asian range, primarily related to their range in mainland China, document different patterns of seasonal abundance, species specific associations with prey, and habitat separation.
septempunctata, and Propylea japonica (Thunberg) (Coleoptera: Coccinellidae) are regularly among the most abundant predatory species but their rank varies by habitat.
Here we review the mechanisms underlying these ecological interactions, focusing on multi-year field studies of native and non-native coccinellids and those using molecular and quantitative ecological methods.
and Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) have spread to new continents, influencing biodiversity and biological control. Over the past 30 yr, multiple species of predatory Coccinellidae, prominently Coccinella septempunctata L.