Invasive Species

Scanes, Colin G.

doi:10.1016/b978-0-12-805247-1.00024-1

Cited by 2 publications

(2 citation statements)

References 39 publications

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“…It was documented that the invasive alien fauna are removing the seeds and that the absence of leaf litter cover is determinant on the fate of seeds after dispersal (Cintra, 1997). At least two of the 10 most dangerous invasive alien mammals in the world (e. g. O. cuniculus and individuals of the genus Rattus; Lowe et al, 2000;European Environment Agency, 2012;Scanes, 2018) were detected removing a large part of the seeds offered. It is known that rodents of the genus Rattus are not hoarding rodents (Meyer & Butaud, 2009) and that they consume on site small seeds (Lobo et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Leaf litter hides post-dispersed seeds from invasive alien removers in a sclerophyll forest in central Chile

2021

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Aim of the study: Seed removal may be a determining filter for regeneration. Factors such as leaf litter, tree cover and seed density affect seed removal. This aims to assess three aspects involving on post dispersal seed removal of four woody species (Lithraea caustica, Maytenus boaria, Quillaja saponaria and Retanilla ephedra) of a sclerophyll forest.Study area: Andean Mediterranean sclerophyll forest of Quillaja saponaria and Lithraea caustica located in the Río de Los Cipreses National Reserve, Chile.Materials and methods: Seven experimental plots were set up, in which seeds were offered in an experiment with variations in leaf litter, tree cover and seed density. Generalized Linear Mixed Models (GLMM) were used for the statistical analysis. Camera traps were installed to identify the seed removers.Main results: Q. saponaria seeds were more removed than the seeds of the other species (0.84, observed mean). Whereas that M. boaria and R. ephedra did not show significant differences on the removal of their seeds (0.77 and 0.67 respectively), both were more removed than L. caustica (0.59). The removal of M. boaria, Q. saponaria and R. ephedra seeds was lower in the presence of leaf litter. No factor influenced the removal of L. caustica seeds. Seed removers were identified as invasive alien species such as Rattus sp. and Oryctolagus cuniculus and native species such as Lycalopex culpaeus.Research highlights: Three woody species of this forest suffer severe seed removal by invasive alien fauna with major implications for the resilience of these forests. The coverage of leaf litter is key to hide away the seeds, increasing survival and could promote germination.Keywords: invasive alien fauna; Mediterranean forest; sclerophyll forest; seed removal factors.

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Section: Discussionmentioning

confidence: 99%

Leaf litter hides post-dispersed seeds from invasive alien removers in a sclerophyll forest in central Chile

2021

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“…Biological invasions are a serious global environmental threat (Walther et al, 2009) and have economic repercussions due to their impairment of ecosystem services and destruction of human infrastructure (Scanes, 2018). The spread of an invasive species occurs in three stages: introduction of propagules (i.e., small group of individuals), establishment, and proliferation (Allendorf and Lundquist, 2003).…”

Section: Introductionmentioning

confidence: 99%

High Exploration Behavior of Termite Propagules Can Enhance Invasiveness

et al. 2022

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Social life is usually associated with enhanced propagule pressure, which increases the chance of introducing several individuals during a single introduction event. Social insects are therefore among the most successful invasive species, benefiting from rapid establishment and increased foundation success in new habitats. In termites, propagule pressure may also be increased by the development of reproductive individuals from a small group of foraging workers. This suggests that enhanced exploration activity may increase propagule pressure through an elevated chance of transporting isolated groups of foragers. Here, we analyzed the exploration behavior of three termite species of the Reticulitermes genus, comparing the invasive species Reticulitermes flavipes (testing both native and introduced populations) to the native species Reticulitermes grassei and Reticulitermes lucifugus. Different features representative of the exploration capacity were measured during 48 h, including: the number of tunnels, the length of tunnels, the number of foragers, and the interindividual distance of foragers in a straight line or through tunnels. Our results show that compared to the native Reticulitermes species, R. flavipes foragers from both populations dug more tunnels with a longer total length, and individuals were more spatially dispersed and covered a larger exploration zone. These findings suggest that the enhanced exploration ability of R. flavipes may have played a role in its invasion success, by increasing its propagule pressure through a higher chance of human-mediated transport. In addition, the absence of differences between the native and introduced populations of R. flavipes suggests that the exploration behaviors facilitating the worldwide invasion of this species originated in its native range.

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Invasive Species

Cited by 2 publications

References 39 publications

Leaf litter hides post-dispersed seeds from invasive alien removers in a sclerophyll forest in central Chile

Leaf litter hides post-dispersed seeds from invasive alien removers in a sclerophyll forest in central Chile

High Exploration Behavior of Termite Propagules Can Enhance Invasiveness

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