The deterioration of environmental quality in the Sinos River basin is directly associated with impacts intense industrialization and urbanization. An integrated assessment (IEA) was conducted July September 2012, areas along sources EstânciaVelha/Portão, Pampa Schmidt streams using physical, chemical biological methods. water three sampling sites not proper for human consumption, presented a low toxic contamination index (TCI) mesotrophic characteristics. One site included Class 4, two, 3,...

The leaf production and senescence, formation release of spores Cyathea atrovirens (Langsd. & Fisch.) Domin were analysed based on the monthly monitoring 50 plants growing in a secondary forest, municipality Novo Hamburgo, state Rio Grande do Sul, during year 2004. caudex height number mature fertile leaves recorded annually 2004-09. In 2004, senescence concomitant, without total abscission. Population synchrony at emergence (Z = 0.86) 0.82) increased spring but did not correlate with...

Alsophila setosa Kaulf. é uma pteridófita arborescente que ocorre em formações florestais primárias e secundárias no sul sudeste do Brasil. O presente estudo discute a estrutura populacional de A. setosa, arquitetura das partes subterrâneas, bem como herbivoria suas frondes espécies epifíticas. trabalho campo foi desenvolvido duas vegetais secundárias, nos municípios Morro Reuter Sapiranga, Estado Rio Grande Sul, Parcelas contíguas 100 m² foram amostradas para registro da ocorrência altura...

A extração ilegal de Dicksonia sellowiana Hook., uma espécie samambaia arborescente, da Floresta Ombrófila Mista, no sul do Brasil, modifica a estrutura vegetação e reduz disponibilidade microhabitats para espécies epifíticas. composição distribuição vertical pteridófitas epifíticas foram estudadas sobre D. sellowiana. O estudo foi desenvolvido em área Parque Municipal Ronda, Estado Rio Grande Sul, Brasil. Foram selecionados 164 forófitos seus cáudices divididos intervalos 1 m, partir solo....

Cyathea delgadii Sternb. é uma samambaia arborescente que ocorre em florestas primárias e secundárias da região nordeste até o sul do Brasil. O presente estudo discute a estrutura populacional desenvolvimento fase esporofítica (crescimento cáudice, produção de frondes, fenologia esporos) C. delgadii, floresta secundária, no Estado Rio Grande Sul, Brasil, baseado na observação 41 plantas, durante 13 meses. A espécie apresentou padrão espacial agregado freqüência expressivamente alta...

No sul e sudeste do Brasil, a samambaia arborescente Dicksonia sellowiana Hook. é ainda extraída ilegalmente de remanescentes florestais para uso da capa fibrosa seu cáudice, bem como cultivo planta ornamental. presente trabalho, o crescimento produção, expansão senescência frondes, formação liberação esporos D. foram estudados com base na observação 37 plantas. Durante um período ano observação, os cáudices cresceram, em média, 5,65 cm ano-1, sendo que taxa se correlacionou fortemente...

Cyathea atrovirens (Langsd. & Fisch.) Domin, an intensely exploited tree fern, is found inside forests in several succession stages, as well swamps, roadsides and unused fields the Rio dos Sinos basin, state of Grande do Sul, southern Brazil. This study evaluated vitro germination gametophyte development C. under different pH conditions, spore viability after storage times at 7 ºC. The lowest rate spores was obtained 7.0. At 5.0 to 6.5, laminar started 20 30 days culture. Antheridia...

Samambaias epifíticas são consideradas importantes indicadoras de qualidade ambiental, pois impactadas pelo efeito borda. Neste trabalho, analisou-se esse em duas comunidades samambaias remanescentes floresta com araucária, sendo a primeira denominada Macaco Branco, uma estrada que corta o fragmento; e outra, Cravina, apresentando área produção agrícola no entorno. Foram sorteadas 12 parcelas na borda interior florestal cada sítio, nas quais coletaram-se parâmetros fitossociológicos,...

Cyathea corcovadensis (Raddi) Domin occurs in northeastern, southeastern and southern Brazil, being widely distributed the last. This was a three-year study, conducted from August 2008 to July 2011, which we evaluated C. subtropical forest Brazil. For first year (August 2009), monitored 30 plants on monthly basis order analyze phenological events (vegetative reproductive) caudex growth. We also estimated ages of plants. Except June 2009, leaf emergence senescence were continuous irregular,...

Edge effects impact species richness and composition as a result of environmental changes caused by fragmentation. This study analyzed edge on community terrestrial ferns lycophytes in an Araucaria forest Brazil at sites subjected to differing conditions: (1) site bordering road running through the interior conservation unit, (2) agricultural property. Twelve 10 × m plots were selected each site, accounted for total 48 plots. The edges had lost their characteristic floristic identity,...

In tropical forests, tree ferns constitute an important phorophyte for the establishment and occurrence of epiphytic species. Composition, structure vertical distribution were studied on Alsophila setosa Kaulf., in a semideciduous seasonal forest fragment, city Morro Reuter (29º32'07"S 51º05'26"W), state Rio Grande do Sul, Brazil. The sample consisted 60 caudices at least 4 m high, which divided 1 intervals from ground. specific importance value was estimated trough coverage caudex frequency...

The extractive exploitation of the tree fern Alsophila setosa Kaulf. alters forest formations and diminishes availability micro-habitat for epiphytes. A survey epiphytic communities on A. at 16 study sites in different State Rio Grande do Sul, Brazil, documented occurrence 31 species representing genera six families. greatest richness occurred Polypodiaceae (39%) genus Asplenium L. (22%). Habitual holoepiphyte was predominant ecological category, 61% species. Similarity analysis demonstrated...

In the northeastern region of State Rio Grande do Sul in Southern Brazil, specifically dos Sinos basin, urban parks are an important alternative for conservation remaining natural habitats, as well maintenance and perpetuation biodiversity. A floristic survey fern lycophyte species Parque Municipal Henrique Luís Roessler (PMHLR) (29º 41' S 51º 06' W; alt. 16.4 m) Novo Hamburgo, (State Sul, RS) described their life-forms, substrates preferential environments. Forty-three species, 30 genera 15...

Biotic and abiotic factors, such as luminosity, temperature, air humidity, herbivory, can affect the establishment of reintroduced plants in natural habitats. This study evaluated effects these factors on survival growth Cattleya intermedia into a forest fragment South Brazil. Plants C. were obtained from vitro seed germination asymbiotic culture. Eighty-eight at both edge interior. with greater shoot heights number leaves pseudobulbs suffered more damage herbivores edge. There no...

http://dx.doi.org/10.5902/1980509813327Este trabalho analisou a riqueza e composição da comunidade de samambaias em fragmentos mata ciliar do rio Cadeia, sob diferentes níveis antropização, Santa Maria Herval, Rio Grande Sul, Brasil. Foram alocadas 120 parcelas distribuídas equitativamente três (FI, FII FIII), sendo inventariadas todas as espécies registrada por unidade amostral. A florística entre os foi comparada empregando-se o índice Jaccard distribuição espacial das avaliada meio...

Plants growing in environments with different atmospheric conditions may present changes the morphometric parameters of their leaves. Microgramma squamulosa (Kaulf.) de la Sota is a neotropical epiphytic fern found impacted environments. The aims this study were to quantitatively compare structural characteristics leaves areas air quality conditions, and identify that are potential indicators effects pollution on these plants. Fertile sterile isolated trees collected from an urban (Estância...

<p>The Atlantic Forest, which has a vast epiphytic richness, is priority area for preservation, listed as one of the five most important world hotspots. Vascular epiphyte composition and community structure were studied in two fragments, ombrophilous (29º43'42"S 50º22'00"W) other seasonal (29º40'54"S 51º06'56"W) forest, both belonging to Forest biome Sinos River basin, Rio Grande do Sul, Brazil. In each fragment, 40 trees, divided into four ecological zones, analyzed. zone, occurrence...

The tree fern Alsophila setosa, occurs in primary and secondary forests of southern southeastern Brazil. Two populations forest formations the northeastern part State Rio Grande do Sul, municipalities Morro Reuter (45 plants) Sapiranga (48 plants), were studied to estimate ages plants. approaches tested, one based on total length relation yearly growth rate caudex, second number scars remains stipe bases along caudex frond production. Estimates rates did not agree with information records...

Foi verificada a influência da umidade e do pH substrato de Araucaria angustifolia (Bertol.) Kuntze Dicksonia sellowiana Hook. sobre riqueza, composição estrutura comunitária dos epífitos vasculares no interior Floresta Ombrófila Mista. Para o estudo comunidade epifítica foram selecionados 20 forófitos A. D. sellowiana, inseridos em um hectare Os divididos igualmente quatro intervalos metro altura cada. apresentou espécies, enquanto que 11. A média espécies por forófito foi...