Madrigal Guridi, Xavier; Novelo Retana, Alejandro; Chacón Torres, Arturo
September 2004
Acta Botanica Mexicana;2004, Issue 68, p1
Academic Journal
Lake Zirahuen is located in the north central area of Michoacan state, within the hydrological region of the Balsas basin, at 2075 m above sea level. The lake is monomictic, oligotrophic, endorreic and has a maximum depth of 43 m. The flora and the aquatic vegetation are described. Of the 93 species (55 genera, 35 families) that occur, 27 are tolerant, 42 subaquatic and 24 are strictly aquatic. Plant communities are comprised of hydrophytes that are attached emergent, attached submerged, floating leaved and free submerged. The aquatic vegetation is distributed along the lake shore, extending from the regions of temporary flooding to areas of open water 12 m deep. At present both, the catchment basin and the lake itself are showing signs of ecological degradation due to the intensive exploitation of its resources. Both short and long-term strategies need to be developed to stem further degradation of the lake.


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