The macrobenthic fauna of a former perennial and now episodically filled mexican saline lake |
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| Authors: | Javier Alcocer Alfonso Lugo Elva Escobar Malinali Sánchez |
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| Institution: | (1) Aquatic Ecology Laboratory, Environmental Conservation & Improvement Project, UIICSE, UNAM Campus Iztacala. Av. de los Barrios s/n, Los Reyes Iztacala, Tlalnepantla, 54090 Edo. de México, México;(2) Benthic Ecology Laboratory, Institute of Marine Sciences and Limnology, UNAM, Apdo. Postal 70-405, 04510 Ciudad Universitaria, México, D.F. |
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| Abstract: | Totolcingo (El Carmen), a large and now episodically filled playa lake in the east-ernmost portion of the Mexican Plateau, filled with water in 1993. Water persisted for just one month (May). Alkaline (pH  10), saline (K25 up to 30,000 S/cm) waters, dominated by NaHCO3 and Na2CO3, characterized the lake. The fauna was depauperate. The components of the fauna wereEphydra (Hydropyrus)hians Say (ephydrid),Limnodrilus hoffmeisteri Claparède (tubificid), andBerosus sp. (Coleoptera). The species in the lake were widely dispersed and typical inhabitants of saline lakes. Possible reasons for the depauperate fauna include (a) overall physical and chemical conditions, (b) unpredictable hydrology, and (c) the short (one month) inundation period prevented colonization. |
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| Keywords: | episodic playa lakes macroinvertebrates Mexico salt lakes temporary waters |
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