Disentangling tree species identity and richness effects on the herb layer: first results from a German tree diversity experiment

摘要

QuestionsThe forest herb layer provides a multitude of ecosystem services as a result of its species-rich character. Herb layer diversity and biomass are both influenced by tree layer composition and species richness through species-specific influences on environmental conditions. The results of observational studies on richness-biomass relationships between tree and herb layer have not been unequivocal. We examined tree species identity and richness effects on herb layer species richness, composition, biomass and nutrient concentrations in young experimental tree plantations.