Guadiana River (1999) Guadiana River (2003) Kushiro Marsh (Quadrat F1) Laguna de Zóñar Primorskoje Sagar Island (August 1983) Castel Porziano The Ecological Register
Cercion (odonate): 7 samples
Standardised estimates are produced by subsampling and then extrapolating.
Raw richness may be higher when an abundance distribution is uneven.