Lantana camara is primarily a bird-dispersed invasive plant species that has spread quickly across South Africa in disturbed areas. We re-examined the distribution of Lantana at Rodger and Twine’s (2002) study site (R&T) in a highly grazed communal area and an adjacent conserved area in 2019. R&T found that Lantana was more common in the communal area than in the conserved area. Glyphosate herbicide was sprayed to suppress Lantana from 2016 to 2019 in the conserved area only. We re-examined the bird-dispersal hypothesis by surveying subcanopy and intercanopy environments. We found more Lantana in the subcanopy than in the intercanopy. There were more Lantana plants in the conserved area, but there were virtually none in the communal area. Most concerning was the apparent resprouting of Lantana despite herbicide application. We used sequential aerial photographs and found that there has been an increase in woody cover in the conservation area since 2013, which may exacerbate the problem with this invasive plant. We conclude that it is not communal grazing per se that causes the encroachment of Lantana, and that it has more do with the woody cover of native plants, as concluded by R&T.

Lantana camara主要是一种鸟类传播的入侵植物物种，在南非的受干扰地区迅速传播。我们在 2019 年重新检查了Rodger and Twine (2002) 研究地点 (R&T) 在高度放牧的公共区域和相邻保护区的马缨丹的分布。R&T 发现马缨丹在公共区域比在保护区更常见. 2016 年至 2019 年仅在保护区喷洒草甘膦除草剂以抑制马缨丹。我们通过调查次冠层和冠层间环境重新审视了鸟类传播假说。我们在子冠层中发现的马缨丹比在冠层间的要多。有更多马缨丹保护区内有植物，但公共区域几乎没有。最令人担忧的是，尽管施用了除草剂，但马缨丹仍明显重新发芽。我们使用连续航拍照片发现，自 2013 年以来，保护区内的木质覆盖物有所增加，这可能会加剧这种入侵植物的问题。我们得出的结论是，导致马缨丹被侵占的不是公共放牧本身，而是与本地植物的木质覆盖有关，正如 R&T 得出的结论。