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Grazing Vertebrates Promote Invasive Swamp Stonecrop (Crassula helmsii) Abundance.

Dean, C., Day, J., Gozlan, R. E. and Diaz, A., 2015. Grazing Vertebrates Promote Invasive Swamp Stonecrop (Crassula helmsii) Abundance. Invasive Plant Science and Management, 8 (2), 131-138.

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DOI: 10.1614/IPSM-D-14-00068.1


The macrophyte Australian swamp stonecrop has invaded a wide range of wetland habitats across Europe. An experiment was conducted within an invaded fen habitat, which tested whether the presence of grazing disturbance affected the relative abundance of swamp stonecrop, and whether any detected effect was suppressive or facilitative. The abundance of swamp stonecrop and co-occurring resident plants was monitored within fenced grazing exclosures and in adjacent unfenced plots. Swamp stonecrop abundance was higher in the unfenced plots compared to the fenced exclosures (t(87) = 28.974, p < 0.001), whereas the abundance of co-occurring plants was higher in the fenced exclosures compared to the unfenced plots (t(87) = 6.264, p < 0.001). These results indicate that the presence of large vertebrates could facilitate a higher abundance of swamp stonecrop in situations where competitive resident plant species were selectively removed by these grazing animals.

Item Type:Article
Additional Information:OPEN ACCESS ARTICLE Full versions of Weed Science, Weed Technology, or Invasive Plant Science and Management articles, including Open Access articles, may not be reposted on any website, including institutional repositories or authors' personal websites. However, we welcome links to the article on
Uncontrolled Keywords:grazing disturbance, grazing exclosures, plant community dominance, removal of plant competitors.
Group:Faculty of Science & Technology
ID Code:21840
Deposited By: Symplectic RT2
Deposited On:13 Apr 2015 15:53
Last Modified:14 Mar 2022 13:51


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