Steady state of phytoplankton assemblage in tropical Lake Catemaco (Mexico)

0150583 - HBU-Z 20033070 RIV NL eng J - Journal Article
Komárková, Jaroslava - Tavera, R.
Steady state of phytoplankton assemblage in tropical Lake Catemaco (Mexico).
Hydrobiologia. Roč. 502, - (2003), s. 187-196. ISSN 0018-8158. E-ISSN 1573-5117.
[Workshop of the International Association of Phytoplankton Taxonomy and Acology /13./. Castelbuono, 00.09.2002]
R&D Projects: GA AV ČR KSK6005114
Keywords : lake Catemaco * phytoplankton * food web
Subject RIV: EF - Botanics
Impact factor: 0.720, year: 2003

Phytoplankton of the tropical lake Catemaco (Veracruz, Mexico) showed two small dominant cyanobacteria Cylindrospermopsis catemaco and C. philippinensis, and a group of larger algae in smaller numbers: Aulacoseira granulata curvata, A. cf. italica Fragilaria construens, Achnanthes minutissima, Planktolyngbya circumcreta and Chroococcus microscopicus during the samplings from 1993 to1995. The percentage of total biomass of both Cylindrospermopsis species varied between 34 and 81. Biological variables played an important role in this lake. Fish-stock was formed by native herbivorous species Dorosoma petenense, Bramocharax caballeroi, Astyanax mexicanus, and an introduced Oreochromis niloticus. Feeding activity of fish removed large species of algae and cyanobacteria as well as detrital remnants and zooplankton from the water. Smaller, inedible cyanobacteria remained in the water and formed the stable dominant portion of the phytoplankton. The lake would belong to the functional group SN.
Permanent Link: http://hdl.handle.net/11104/0048113