A) Species richness is the number of species in a community and how evenly they are distributed amongst other species.
B) Species richness is the number of species in a community.
C) Species richness is the number of resources each species has in a community.
D) Species richness is the number of endangered species in a community.

A) Between pH 5 to 7, the number of invertebrate taxa is positively associated with mean stream pH .
B) Between pH 5 to 7, the number of invertebrate taxa is negatively associated with mean stream pH.
C) Number of invertebrate taxa is not associated with mean stream pH.
D) Species richness is greatest at the lowest mean stream pH.

A) Alpha diversity
B) Beta diversity
C) Kappa diversity
D) Gamma diversity