Microflora de Bromeliáceas do estado de Pernambuco, Brasil

Abstract

O autor estudou a microflora de dois gêneros de BROMELIACEAE: Hoenbergia e Portea. As coletas do material foram feitas em seis regiões do Estado de Pernambuco; 1) Região da Mata-Úmida; 2) Região da Mata-Seca; 3) Região do Agreste Central; 4) Região do Agreste Setentrional; 5) Região do Agreste Meridional; 6) Região do Recife. As seguintes diatomáceas indicadoras de águas poluídas (espécies oligossaprobias) foram encontradas nas seis regiões estudadas: Gomphonema parvulum (Kutz) Grunow., Hantzschia amphioxys Grunow, Pinnularia borealis Ehr., Pinnularia microstauron (Ehr) Cleve, gomphonema gracile Ehr., Nitzschia palea Kutz., Melosira roeseana Rabenh., Navicula mutica Kutz., Navicula cryptocephala Kutz., Eunotia pectinalis (Kutz) Rabenh. Foram também observadas CHLOROPHYCEAS nas estações chuvosa e seca nas diversas regiões. Algumas são indicadoras de oligossaprobidade: Scenedesmus quadricauda (Turpin) brebisson. Chlorococcum sp., Chlorella sp. Os fatores ecológicos e comentários referentes ás diatomáceas foram anotados no texto. A tabela I indica a frequência das diatomáceas nas seis regiões estudadas. Maior número dessas diatomáceas, registramos nas regiões do Agreste. A tabela II mostra a temperatura e pH da água de Hoenbergia e Portea em ambas as estações do ano (inverno e verão). Observamos a ocorrência de larvas de culex em Portea e hoenbergia, entretanto, raramente encontramos larvas de Anopheles. As coletas foram feitas durante as estações chuvosa e seca em Hoenbergia e Portea. Determinamos 35 espécies provenientes de 78 amostras coletadas durante o período de 26 meses.<br>The author studied the microflora from two genera of Bromeliaceae: Hoenbergia and Portea. The material was collected in six natural regions of Pernambuco State: 1) Humid Forest Region; 2) Dry forest region; 3) Central Agreste Region; 4) Setentrional Agreste Region; 5) Meridional Agreste Region; 6) Recife Region. The following diatoms that indicate polluted water (oligosaprobic species) have been found in the six Regions studied: Gomphonema parvulum (Kutz) Grunow, Hantzschia amphioxys Grunow, Pinnularia borealis Ehr., Pinnularia microstauron (Ehr) Cleve, Gomphonema gracile Ehr., Nitzschia palea Kutz., Melosira roeseana Rabenh., Navicula mutica Kutz., Navicula cryptocephala Kutz., Eunotia pectinalis (Kutz) Rabenh. Chlorophyceae were also found in samples collected in rainy and dry seasons. some are indicators of oligosaprobic conditions: Sceneaesmus quadricauda (Turpin) Brebisson, Chloro coccum sp., Chlorella sp. Ecological factors and comments, concerning diatoms are reported in the text. Most part of diatoms we have reported in the Agreste Regions. Table (I) shows the frequency of diatoms in the six Regions studied. Table (II) indicates temperature and pH of the water of the bromeliads Hoenbergia and Portea in both seasons of the year (winter and summer). We report the occurence of Culex larvae in Portea and Hoenbergia, however, we also found Anopheles larvae, but they were rarely observed. Collections were made in the rainy and dry season...

Algae in phytotelmata from Caatinga: first record of the genus&nbsp;Rhopalosolen Fott (Chlorophyta) for Brazil

“…Temperature is an important variable for the development of algae in tank bromeliads (Lyra 1976, Sophia et al 2004). In Itaberaba, R. cylindricus was found usually in bromeliads with water temperature about 29.7 ± 2.9 °C.…”

“…Other studies have shown that different algal communities may be found in different plants that are near in the same area (Carrias et al 2014), which may be related to plant architecture (Marino et al 2011) and the exposure to sun (Sophia et al 2004, Brouard et al 2011, Carrias et al 2014, Farjalla et al 2016. Among the main algal groups occurring in Brazilian phytotelmata are the diatoms (Lyra 1971(Lyra , 1976, coccoid green algae (Nogueira 1991), dinoflagellates (Ramos et al 2016) and desmids (Sophia 1999, Sophia et al 2004, Ramos et al 2011.…”

Unraveling algae and cyanobacteria biodiversity in bromeliad phytotelmata in different vegetation formations in Bahia State, Northeastern Brazil

“…In a study of diatoms in bromeliads in Rio de Janeiro State, however, Lyra (1971) reported reduced numbers of those microalgae and attributed that result to their oligotrophic tank water conditions, as well as other environmental factors such as light intensity and temperature. According to that author, mineral element concentrations in those environments could considerably interfere with frustule development -although Pinnularia is one of the most common diatom genera inhabiting those microhabitats, and has been reported in a number of different bromeliad species (Lyra 1971;1976).…”

Diversity of green algae (Chlorophyta) from bromeliad phytotelmata in areas of rocky outcrops and "restinga", Bahia state, Brazil

“…Floristic studies aiming at the chlorophytes in bromeliad phytotelmata are inexistent. The few records of the occurrence of green algae in this type of environment in Brazil were reported by Lyra (1976), who cited some chlorophytes in bromeliad from Pernambuco state; Nogueira (1991) that reported the first occurrence of Scotiellopsis terrestris (Reisigl) Puncochárová & Kalina [= Coelastrella terrestris (Reisigl) Hegewald & N.Hanagata] for phytotelmata environment in tropical region; and Sophia (1999) that conducted a taxonomic survey of the desmids and some other algal groups, including eight chlorophytes.…”