Recolonizing native wildlife facilitates exotic plant invasion into Singapore’s rain forests: Data and R script

Halting biological invasions and rewilding extirpated fauna are conservation interventions to bolster biodiversity, species interactions, and ecosystems. These actions are often considered separately and the potential for reintroduced wildlife to facilitate invasive plants has been largely overlooked. Here, we investigate the role of Singapore’s recolonizing native wild pigs (Sus scrofa) in facilitating an invasive weed Miconia crenata into tropical rain forests, which are normally highly resistant to invasion. We conducted line-transect surveys in 11 Singaporean rain forests and used generalized linear mixed models to consider the contribution of pigs' soil disturbances, human forest paths, and other environmental covariates, on the density of M. crenata. We found that M. crenata was more abundant at forest edges and invasion into forest interior was facilitated by pigs, paths, and canopy gaps, but that these effects were all additive, not synergistic (i.e. not multiplicative). These r..., Site 
We conducted fieldwork in 11 secondary rain forest patches in Singapore (1°21’07.6”N, 103°49’11.3”E) from February 2019 to January 2020, including (1) the Dairy Farm and (2) Hindhede area of the Bukit Timah Nature Reserve (BTNR), (3) the MacRitchie in the Central Catchment Nature Reserve (CCNR), (4) Bukit Batok Nature Park, (5) East Coast Park, (6) Mandai Park, (7) the Fort Siloso area of Sentosa, (8) Telok Blangah, (9) Kent Ridge Park, (10) Clementi Forest and (11) Pulau Ubin Island (Table S1; Figure. 2). We conducted vegetation transects (see more below) on and off human paths in all forests and at the time of sampling, pigs had not recolonized (were absent from) Sentosa, Telok Blangah, and East Coast Park. 
Vegetation Transects
We established 2-5 linear “off path” transects spaced >200 m apart randomly in each forest, extending 30-200 m from the forest edge to the centre, depending on the size of the forest (Figure. 2b; Table S1). We observed M. crenata and covariates along ..., Microsoft Excel and R are needed to open the files.Â