Title |
Biodiversity and invasibility in grassland microcosms
|
---|---|
Published in |
Oecologia, February 2001
|
DOI | 10.1007/s004420000549 |
Pubmed ID | |
Authors |
Jeffrey S. Dukes |
Abstract |
In the years since Charles Elton proposed that more diverse communities should be less susceptible to invasion by exotic species, empirical studies have both supported and refuted Elton's hypothesis. Here, I use grassland community microcosms to test the effect of functional diversity on the success of an invasive annual weed (Centaurea solstitialis L.). I found that high functional diversity reduced the success of Centaurea by reducing resource availability. An equally important, but unstudied, question is whether diversity can buffer a community against the impacts of invasive species. In this experiment, although species diversity (independent of functional diversity) did not affect the success of the invader, the invader suppressed growth of species-poor communities more strongly. Invasion of Centaurea also increased summer evapotranspiration in species-poor communities. These results suggest that loss of species diversity alone does not affect community invasibility, but that communities with fewer species may be more likely to decline as a consequence of invasion. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 9 | 2% |
Brazil | 5 | 1% |
South Africa | 4 | 1% |
Switzerland | 3 | <1% |
Germany | 3 | <1% |
Australia | 2 | <1% |
France | 2 | <1% |
United Kingdom | 2 | <1% |
Spain | 2 | <1% |
Other | 6 | 2% |
Unknown | 352 | 90% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 77 | 20% |
Student > Ph. D. Student | 66 | 17% |
Student > Master | 57 | 15% |
Student > Bachelor | 35 | 9% |
Professor | 30 | 8% |
Other | 92 | 24% |
Unknown | 33 | 8% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 200 | 51% |
Environmental Science | 115 | 29% |
Earth and Planetary Sciences | 14 | 4% |
Biochemistry, Genetics and Molecular Biology | 4 | 1% |
Engineering | 3 | <1% |
Other | 11 | 3% |
Unknown | 43 | 11% |