Limnological characteristics and seasonal changes in density and diversity of the phytoplanktonic community at the Caçó pond, Maranhäo State, Brazil
Braz. arch. biol. technol
; 46(4): 641-651, Dec. 2003. ilus, tab, graf
Article
Dans En
| LILACS
| ID: lil-355535
Responsable en Bibliothèque :
BR1.1
ABSTRACT
Seasonal changes of the phytoplanktonic community and limnological abiotic characteristics of Caçó pond (Maranhäo State, Brazil) was evaluated from two field researches during the rainy (April 1999) and dry (November 1999) seasons. Measurements of twelve chemical and physical variables and phytoplankton collections were carried out at eight sampling stations. The Chlorophyceae and Cyanobacteria groups were in highest fractions during the rainy and dry seasons, respectively. The limnological abiotic variables showed a homogenous spatial distribution. The cluster analysis, using Bray-Curtis distance, distinguished two major groups, represented by the most common and abundant species in both the periods. The results showed that the climate regime, due to the seasonal changes in pluviosity, was a determinant over the phytoplanktonic community structure at Caçó pond
Texte intégral:
1
Indice:
LILACS
Pays comme sujet:
America do sul
/
Brasil
langue:
En
Texte intégral:
Braz. arch. biol. technol
Thème du journal:
BIOLOGIA
Année:
2003
Type:
Article
/
Project document