期刊
OIKOS
卷 130, 期 7, 页码 1056-1061出版社
WILEY
DOI: 10.1111/oik.08443
关键词
brome; Bromus rubens; California; drylands; Ephedra californica; facilitation; indirect interactions; invasion; management; positive interactions; San Joaquin Desert; shrubs
类别
资金
- NSERC DG
The study suggests that shrubs can accelerate the invasion process by invasive species and amplify their negative effects on native communities, leading to ecosystem degradation. Therefore, more attention should be paid to the indirect effects of shrubs in order to advance grassland management and restoration theory more rapidly.
Numerous pressures influence the ecological capacity and health of drylands globally. Shrubs are often a critical component of these systems and can function positively as foundation species through facilitation of other species. Nonetheless, limited attention has been paid to the potential negative and indirect effects of shrubs. Here, we tested the hypothesis that plant facilitation can both accelerate the invasion process and amplify the negative effects of an invader on the native community. The invasive species Bromus madritensis ssp. rubens capitalized on facilitation by resident native shrub species. This in turn further degraded California mixed grasslands by negatively impacting other annual protege plant species in these specific microhabitats. Indirect shrub-mediated interactions were thus a critical component of the ecological community assembly processes, and this suggests that we need to move beyond pairwise interactions to more rapidly advance grassland management and restoration theory.
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