Fig. 1 in Habitat characteristics and environmental parameters influencing fish assemblages of karstic pools in southern Mexico

Fig. 1. Calakmul Biosphere Reserve in southern Mexico, showing the borderline of the core area, and buffer zone indicated by shaded polygons. The white circles denoted pools located in habitat A, black circles are pools in habitat B, and black squares in habitat C. Pool identification numbers are specified in Table 3.