(Chlorophyta) do Reservatorio de Itaipu: Chara braunii Gmelin.
Much of the current difficulty with charophyte identification was engendered by Wood's (1965) treatment of the Characeae
in which numerous taxa were lumped under individual species and assigned subspecific ranks.
Species belonging to the family Characeae are typical of oligotrophic environments, in which water transparency is higher and the density of phytoplankton is lower (Kiersch, Muhleck, & Gunkel, 2004).
2]) of families and biological forms (BF) in Penha reservoir (city of Joao Pessoa, Northeast Brazil) BF Dry season Voucher Families Oct 09 Dec 09 Feb 10 Characeae Chara sp.
The population of limnic organisms and Characeae
is rich also in the Holocene part of the studied section.
The quantity of Characeae
oogonia is in its maximum.
As the results of plant macrofossil analysis mainly reflect species from local vegetation, it is not surprising that most of the seeds and vegetative parts belonged to the aquatic species: Ranunculus sect Batrachium, Characeae, Equisetum sp.
Other features indicative of water environment are abundant Characeae oospores, Ranunculus sect.
Similarly, 10 species of Characeae were found in the Pantanal, which is attributed to the alkaline and brackish waters in the Southwestern Pantanal (Bueno 1993, Pott & Pott 1997), but only two were identified in the Parana floodplain, where acid soils predominate and charophytes do not thrive.
Characeae do Pantanal de Mato Grosso do Sul, Brasil, Levantamento Floristico.
The families with the highest number of species were Poaceae (14 taxa), Cyperaceae and Polygonaceae (seven taxa each) and Characeae
, Araceae, Hydrocharitaceae, Onagraceae (four taxa each).
Ademas, se utilizaron las descripciones especificas para las especies de Characeae
(Wood y Imahori 1964, 1965, Guerlesquin 1981), Azollaceae (Slocum y Robinson 1997), Hydrocharitaceae (Holm-Nielson y Haynes 1986), Potamogetanaceae (Holm-Nielson y Haynes 1986a) y Pontederiaceae (Horn 1987).