Interspecific competition 'current 1 Community assembly 1 Community ecology 1 Community-weighted mean 1 Community-weighted means 1 Ecology 1 Ephemeroptera 1 Finite difference method 1 Functional diversity 1 Inter-specific competitions 1 Interspecific trait difference 1 Interspecific trait differences 1 Mean values 1 Reduced light 1 Weighted mean 1 community ecology 1 environmental factor 1 habitat segregation 1 heterogeneity 1 heterogeneous medium 1 interspecific competition 1 niche differentiation 1 river system 1 seedling 1 tree 1