Journal
PLANT ECOLOGY
Volume 188, Issue 1, Pages 29-37Publisher
SPRINGER
DOI: 10.1007/s11258-006-9145-0
Keywords
community dynamics; exotic species; nutrient addition; species richness; species turnover
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Changes in species richness, turnover, composition and above-ground biomass of herb-rich woodland were documented following fertilizer application and water addition over three growing seasons. Addition of fertilizer significantly reduced species richness relative to unmanipulated control and water addition plots after 3 years. This change coincided with significant increases in biomass, which were largely due to increased growth of exotic annual grasses. The reductions in richness observed in the fertilized plots were a consequence of both lower rates of local colonization and enhanced rates of local extinction of the resident species. Species loss was not random; native species were lost after nutrient addition whereas exotic species were not. Nutrient limitation was more important for species coexistence in these communities than was water availability.
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