Ivania Batista de Oliveira

Contribuição ao conhecimento de Cosmarium Corda ex Ralfs (Desmidiaceae, Zygnematophyceae) para a Bahia e o Brasil

This study aimed to identify the taxa belonging to the genus Cosmarium present in two Environmental Protection Areas of the coastal plain of the northern Bahia, and contribute to the knowledge of its taxonomic composition and geographic distribution in Bahia State, Brazil. Samples were collected during the Summer (January to March 2007) and Winter (June to August 2007) using plankton net 20 µm size and fixed immediately in Transeau solution. Qualitative analysis and illustrations were conducted with the aid of an optical microscope and digital camera attached. Forty-three taxa were recorded, of these, three species and two varieties are new records for Brazil, and 28 species and three varieties are new records for the State of Bahia.

Micrasterias C. Agardh ex Ralfs (Zygnematophyceae) de duas Áreas de Proteção Ambiental da planície litorânea do norte da Bahia, Brasil

Taxonomical survey of genus Micrasterias C. Agardh ex Ralfs of two Environment Protection Areas (APA Rio Capivara and APA Lagoas de Guarajuba), both located in the Camacari, Bahia State, northeastern Brazil. Ninety-six samples of planktonic and periphytic material studied was collected during the Summer (December 2006 to March 2007) and Winter (May to August 2007), both in lotic and lentic environments. Fourteen taxa were identified, from which M.americana (Ehrenb.) Ralfs var. bahiensis I. B. Oliveira, C. E. M. Bicudo & C. W. N. Moura is described and proposed as new to Science, and 10 constitute pioneer citations for the state of Bahia desmidflora, namely, M. alata G. C. Wall., M. arcuata Bailey var.subpinnatifida West & G. S. West f. subpinnatifida, M. borgei H. Krieg. var. borgei, M. foliacea Bailey ex Ralfs var. foliacea, M. furcata C. Agardh ex Ralfs var. furcata f. furcata, M. laticeps Nordst. var. laticeps, M. laticeps Nordst. var.acuminata H. Krieg., M. mahabuleshwarensis J. Hobson var.ampullacea (W. M. Maskell) Nordst., M. mahabuleshwarensis J. Hobson var. mahabuleshwarensis f. mahabuleshwarensis, M. pinnatifida (Kutz.) Ralfs var. pinnatifida f. pinnatifida, M. radiosa Ralfs var. elegantior (G. S. West) Croasdale, M. rotata (Grev.) Ralfs var. rotata and M. truncata (Corda) Breb. ex Ralfs var. pusilla G. S. West. The best represented species in the study area were M. pinnatifida and M. alata, present in 38.6% and 36.6% of studied samples, respectively. Micrasteriaslaticeps var.acuminata and M.americana var. bahiensis, were the least represented ones, since they occurred just in 2,08% and 1,04% respectively.

Plantas vasculares das áreas alagadas dos Marimbus, Chapada Diamantina, BA, Brasil

Swampy vascular plants are important components of tropical ecosystems although barely studied in the Brazilian Northeast. This paper goals at the identification of vascular plants of Marimbus, a swampy area in the Chapada Diamantina, Bahia, discussing geographic distribution and biological specter aspects. It also presents a comparison with other floristic surveys in swampy areas. 130 species in 46 families were registered. The family Cyperaceae was the most abundant (15%), followed by Rubiaceae (10%), Poaceae (8%), Myrtaceae (7.6%), Leguminosae (6.8%) and Polygonaceae (3.8%). Amphibious plants are the most common ones (58%), the emergent, floating (fixed or free) and submerged ones make up to 39% of the flora, which presents 25% of nanophanerophytes, 13% of geophytes and 12% of microphanerophyte. Most species present neotropical distribution (34%), many are ruderal (17%) and some are multicontinental (9%). This flora is less dissimilar to that from Pantanal Matogrossense.

Novas ocorrências de desmídias filamentosas (Desmidiaceae, Zygnematophyceae) para o estado da Bahia, Brasil

The filamentous desmids are composed of relatively short filaments of cells that dissociate rather easily. These algae are poorly known today in the state of Bahia, being restricted to 13 taxa. This study aimed to do a taxonomic inventory of filamentous genera of the family Desmidiaceae (Zygnematophyceae) from two environmental protection areas, Rio Capivara and Lagoas de Guarajuba, Camacari municipality, to increase our knowledge of these organisms in Bahia. We analyzed 33 samples collected according to the methods employed in studies of continental microalgae taxonomy. 15 taxa were recorded, distributed in seven genera: Bambusina Kutz. ex Kutz, Desmidium C.Agardh ex Ralfs, Groenbladia Teiling, Hyalotheca Ehrenb. ex Ralfs, Onychonema Wallich, Spondylosium Breb. ex Kutz. and Teilingia Bourr. Of these, nine are additions to the algal flora of continental Bahia, increasing the total to 22 known species.

Desmids (Desmidiaceae, Zygnematophyceae) with cylindrical morphologies in the coastal plains of northern Bahia, Brazil

Our knowledge of desmids with cylindrical morphologies in the state of Bahia, Brazil, is quite limited, only 13 such taxa having been described to date. The present study reports the results of a taxonomic inventory of desmids (Desmidiaceae) with cylindrical morphologies from the coastal plains of northern Bahia. During the summer months (January-March) and winter months (June-August) of two separate years (2007 and 2009), we collected a total of 90 samples of planktonic and periphytic material from lotic and lentic environments within three environmentally protected areas within the state (Rio Capivara, Lagoas de Guarajuba, and Litoral Norte). We identified 32 taxa, distributed among six genera (Docidium, Haplotaenium, Ichthyocercus, Pleurotaenium, Tetmemorus, and Triploceras); three were new additions to the algal flora of Brazil (Haplotaenium minutum var. minutum f. maius, Ichthyocercus angolensis, and Pleurotaenium coronatum var. nodulosum). In addition, the geographical distributions of 20 taxa were expanded to include northeastern Brazil. The genus Docidium was reported for the first time in Bahia.

Novos registros de táxons dos gêneros Euastrum Ehrenb. ex Ralfs e Micrasterias C. Agardh ex Ralfs (Zygnematophyceae, Desmidiaceae) para a Bahia e o Brasil

From the inventory of desmids occurring in lotic and lentic environment, North Coast Environmental Protection Area of Bahia State, Northeastern Brazil, were cataloged 45 taxa (35 Euastrum Ehrenb. ex Ralfs and ten Micrasterias C. Agardh ex Ralfs); 37 constitute additions to the flora of the Northeast, of these eight are being registered for the first time to Brazil, they are: Euastrum ansatum Ehrenb. ex Ralfs var. attenuatum Schmidle, E. cornubiense West & G.S. West var. medianum (Nordst.) Willi Krieg., E. croasdaleae Gronblad var. croasdaleae, E. divaricatum P. Lundell var. divaricatum, E. humbertii Bourr., E. inerme (Ralfs) P. Lundell, E. obesum Joshua var. obesum, E. umbonatum (West & G.S.West) Schmidle. The material studied came from 230 samples collected during two periods in summer (January-March 2009) and in winter (June-August 2009). Descriptions and comments are provided with related taxa, as well as expanding the geographic distribution of these for the northeast and for Brazil.

Adição de registros de Cosmarium Corda ex Ralfs (Conjugatophyceae, Desmidiaceae) para a região Nordeste do Brasil

From the taxonomic study of desmids occurring in lotic and lentic environments in the North Coast Environmental Protection Area, Bahia, Brazil, we cataloged 35 taxa belonging to the genus Cosmarium Corda ex Ralfs, of which 33 are being registered for the first time for the phycology flora of the Northeastern Brazil including little-known taxa and others rediscovered 100 years after the last citation, e.g., Cosmarium trinodulum Nordst. var. brasiliense Borge and Cosmarium horridum Borge. The materials studied were from samples collected in two periods, namely in the summer (January-March 2009) and winter (June-August 2009). Descriptions and comments with related taxa are provided, as well as the wide geographic distribution in Brazil.

First records of Zygnematales (Zygnematophyceae, Streptophyta) for the state of Bahia, Brazil

This study presents the first taxonomic inventory of the order Zygnematales in the Litoral Norte Environmentally Protected Area, in the state of Bahia, Brazil. Fifty samples of planktonic and periphytic material were collected, from lotic and lentic environments, during the summer (January-March) and winter (June-August) of 2009. We identified 18 taxa distributed among five genera (Cylindrocystis, Mougeotia, Netrium, Spirogyra, and Spirotaenia). Of those 18 taxa, eight were new additions to the Brazilian desmid flora: Mougeotia calcarea; Mougeotia elegantula; Spirogyra gracilis; Cylindrocystis crassa var. elliptica; Cylindrocystis brebissonii var. minor; Cylindrocystis brebissonii var. turgida; Netrium digitus var. parvum; and Netrium oblongum var. oblongum. The geographical distributions of ten taxa were extended to include northeastern Brazil.