RESUMO
Quatro populações de Baccharis trimera (Asteraceae) foram analisadas no município de Viçosa-MG quanto ao ciclo fenológico. As observações foram realizadas mensalmente de março de 2010 a março de 2011 acompanhando a fenofase vegetativa e reprodutiva em espécimes ocorrentes em diferentes ambientes - barranco, mata de eucaliptos, mata secundária e pastagem. Os indivíduos do barranco e da pastagem floresceram durante maio, junho e julho e frutificaram entre agosto e setembro. As plantas em sub-bosque de mata secundária não apresentaram a fenofase reprodutiva. A floração e a frutificação das plantas na mata de eucalipto ocorreram após um mês em relação às outras populações. O conhecimento preliminar do ciclo fenológico da espécie contribui para a estratégia de seu manejo sustentável e emprego medicinal.
Four populations of Baccharistrimera (Asteraceae) were analyzedin Viçosa-MG in relation to thephenological cycle. The observations were taken monthly from March 2010 to March 2011 following the vegetative and reproductive phenology inspecimens occurringin different environments-ravine, forest of eucalyptus trees, secondary forest and pasture. Individuals from the ravine and pasture bloomed during May, June and July and bore fruitin August and September. The plants of the secondary forestunder story showed no reproductive phenology. Flowering and fruiting of plants in the forest of eucalyptus trees occurred after one month compared to other populations. Preliminary knowledge of the phenological cycle of the species contributes toits sustainable management strategy and medicinal uses.
Assuntos
Baccharis/metabolismo , Compostos Fenólicos/análise , Plantas Medicinais/classificaçãoRESUMO
We evaluated seasonal species presence and richness, and abundance of medium and large sized mammalian terrestrial fauna in the [quot ]Mário Viana[quot ] Municipal Biological Reserve, Nova Xavantina, Mato Grosso, Brazil. During 2001, two monthly visits were made to an established transect, 2,820 m in length. Records of 22 mammal species were obtained and individual footprint sequences quantified for seasonal calculation of species richness and relative abundance index (x footprints/km traveled). All 22 species occurred during the rainy season, but only 18 during the dry season. Pseudalopex vetulus (Lund, 1842) (hoary fox), Eira barbara (Linnaeus, 1758) (tayra), Puma concolor (Linnaeus, 1771) (cougar) and Hydrochaeris hydrochaeris (Linnaeus, 1766) (capybara) were only registered during the rainy season. The species diversity estimated using the Jackknife procedure in the dry season (19.83, CI = 2.73) was smaller than in the rainy season (25.67, CI = 3.43). Among the 18 species common in the two seasons, only four presented significantly different abundance indexes: Dasypus novemcinctus Linnaeus, 1758 (nine-banded armadillo), Euphractus sexcinctus (Linnaeus, 1758) (six-banded armadillo), Dasyprocta azarae Lichtenstein, 1823 (Azara's Agouti) and Tapirus terrestris (Linnaeus, 1758) (tapir). On the other hand, Priodontes maximus (Kerr, 1792) (giant armadillo) and Leopardus pardalis (Linnaeus, 1758) (ocelot) had identical abundance index over the two seasons. Distribution of species abundance in the sampled area followed the expected pattern for communities in equilibrium, especially in the rainy season, suggesting that the environment still maintains good characteristics for mammal conservation. The present study shows that the reserve, although only 470 ha in size, plays an important role for conservation of mastofauna of the area as a refuge in an environment full of anthropic influence (mainly cattle breeding in exotic pasture).