Blechnaceae da Estação Ecológica do Panga, Uberlândia, Minas Gerais, Brasil

Arantes, Adriana A.; Prado, Jefferson; Ranal, Marli A.

doi:10.1590/s2236-89062008000300002

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…We reviewed the flowering time in Myrtaceae (considering the fleshy and dry fruit species) and confirmed that, irrespective of the season (dry or wet), Myrtaceae species flower when the day‐length is greater than 12 h, i.e. from October to March between the latitudes of 19° and 44° S, including Brazil (Talora & Morellato 2000; Arantes & Monteiro 2002; Lima & Guedes‐Bruni 2004; Romagnolo & Souza 2004, 2006; Gressler 2005; Souza et al 2007; Souza & Morim 2008), Chile (Seguel 1986; Smith‐Ramírez, Armesto & Figueroa 1998) and Australia (O’Brien & Calder 1993; Keatley & Hudson 1998; Law et al 2000).…”

Section: Discussionmentioning

confidence: 80%

The shared influence of phylogeny and ecology on the reproductive patterns of Myrteae (Myrtaceae)

2010

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Summary1. Many factors shape plant reproductive patterns including climate, competition or attraction of pollinators and seed dispersers, flower and fruit morphologies and phylogenetic relationships. South American Myrtaceae (Myrteae) were chosen to evaluate hypotheses on how abiotic and biotic factors, morphology and phylogeny influence plant reproductive phenology. 2. We examined whether Myrteae reproductive patterns are seasonal and related to climate; whether aggregated or segregated flowering and fruiting occur among species sharing pollinators or seed dispersers; the relationship between phenological and morphological traits, time of reproduction and Myrteae phylogenetic history; and the shared influence of ecological (environmental) and phylogenetic factors on Myrteae reproductive patterns. 3. We observed flowering and fruiting of 34 Myrteae species during 30 months in an Atlantic rain forest (south-eastern Brazil). We employed circular statistics to test for seasonality and multiple regressions to relate climate and phenology. Competition and facilitation hypotheses were tested using null models. We quantified the phylogenetic signal on phenology and morphology of Myrteae species using phylogenetic eigenvector regression (PVR) analyses, and used PVR and partial regressions to quantify the influences of ecology and phylogeny on phenology. 4. Myrteae flowered seasonally, whereas fruiting was not seasonal. Environmental factors (daylength and temperature) and associations with biotic vectors through facilitation hypothesis explained the aggregated blossom. Fruit maturation time affected the species' flowering sequence. Plants with longer fruit maturation times flowered at the end of the appropriate season, explaining the continuous fruit availability despite the seasonal flowering. The random fruiting pattern explained the regular presence of seed dispersers. Myrteae phenology was phylogenetically structured, even when phenophases were not seasonal, i.e., closer related species fruited under more similar environmental conditions, suggesting that the reproductive phenological niche was inherited along the course of evolution. We detected a shared influence of ecology and phylogeny on Myrteae phenological responses, and the ecological component explained better phenological variation than phylogeny. 5. Synthesis. We provided a new perspective on plant phenology based on phylogeny and ecology and demonstrated the importance of considering their shared influence in phenological studies. Our analyses can be employed for the most representative families of highly diverse ecosystems to improve our understanding of evolutionary patterns and general trends in phenology.

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Section: Discussionmentioning

confidence: 80%

The shared influence of phylogeny and ecology on the reproductive patterns of Myrteae (Myrtaceae)

2010

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“…Blechnaceae, com apenas um gênero no Rio Grande do Sul, Blechnum, é representada por plantas terrestres, rupícolas ou raramente epífitas, hemiepífitas ou lianescentes. Suas espécies possuem rizoma horizontal, ereto ou escandente, e a família distingue-se, sobretudo, por apresentar um par de soros lineares paralelos à costa média do folíolo e com indúsio abrindo-se em direção a esta (ARANTES; PRADO; RANAL, 2008 [2]). As espécies de Blechnum foram encontradas no campus preferencialmente em mata ciliar, com um número significativo de indivíduos, onde predominam espécimes de Blechnum brasiliense (figura 1D).…”

Section: Resultsunclassified

Pteridoflora da Universidade Federal de Santa Maria (UFSM), campus Palmeira das Missões, RS, Brasil

Farias¹,

Klein²,

Garlet³

et al. 2014

ABC

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O presente trabalho apresenta o levantamento da pteridoflora ocorrente em uma área de 70 hectares da Universidade Federal de Santa Maria (UFSM), no campus Palmeira das Missões, região noroeste do Rio Grande do Sul. As coletas foram realizadas quinzenalmente, utilizando-se o método de caminhamento. O material foi coletado em estágio reprodutivo, sendo identificado com auxílio de bibliografia especializada e comparado com material de herbário. Registrou-se um total de 28 espécies, distribuídas em 20 gêneros e 13 famílias. Blechnaceae é a família mais diversificada, com seis espécies, seguida de Polypodiaceae e Pteridaceae, com cinco espécies; Thelypteridaceae, com três; e Anemiaceae, Aspleniaceae, Dennstaedtiaceae, Dryopteridaceae, Salviniaceae, Equisetaceae, Gleicheniaceae, Lycopodiaceae e Selaginellaceae com apenas uma espécie cada. Os resultados indicam a fragmentação dos hábitats e a degradação ambiental como fatores que colaboram com a redução da diversidade de pteridófitas no campus, bem como com a diminuição em tamanho e número de suas populações naturais, comparando-se com a diversidade encontrada em outros estudos em áreas semelhantes.

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“…on Atlantic Rain Forest inselbergs from Rio de Janeiro (Santos & Sylvestre 2006) and Espírito Santo states (Aquije & Santos 2007), in the flooded forest and Ericaceae restinga of Jurubatiba Coastal Woodlands National Park (Norte do Rio de Janeiro), associated to Typha dominguensis and Pityrogramma calomelanos (Santos & Sylvestre 2001). It is also found on the pteridoflora of Cerrado from Minas Gerais State (Arantes et al 2008 (Batten & Grenfell 1996). Occurrence: Holocene lake sediments of coastal plain from Rio de Janeiro State (Barth et al 2001;Dias et al 2001;Luz et al 2006;2011;Freitas 2011) and in Quaternary marine sediments from Campos Basin .…”

Section: Restinga Vegetationmentioning

confidence: 95%

Bryophyte and pteridophyte spores and other palynomorphs in quaternary marine sediments from Campos Basin, southeastern Brazil: Core BU-91-GL-05

et al. 2015

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This paper presents morphological descriptions and ecological data of cryptogam spores and other non-pollen palynomorphs from Quaternary sediments of Campos Basin, Rio de Janeiro, SE Brazil. The ages were derived from biostratigraphy of planktonic foraminifers and two radiocarbon dates, and suggest that sediment deposition started in the last 140,000 years BP. Thirty different types of palynomorphs were identified, described, and photographed: two bryophyte spores (sensu lato); 21 pteridophyte spores; four freshwater microalgae; onePseudoschizaea; and two microfungi. Some of the identified spores (Sphagnum, Blechnum, Cyatheaceae, Dennstaedtiaceae, Lycopodiella, Microgramma, Polypodium, Acrostichum, Pityrogramma, and Lygodium) are related to the modern flora found on the northern coast of Rio de Janeiro State, at the Restinga of Jurubatiba, from vegetation types such as shrub swamp/ coastal swamp formation, seasonally flooded forest, Clusia and Ericaceae woods, and disturbed vegetation. The freshwater microalgae and the microfungi are also presently recorded from the coastal lagoons of this region. The high spore concentration in slope sediments reflects the intense terrigenous influx, caused by a relative low sealevel during glacial stages. Palynological analysis suggests the presence of taxa from flooded forests and humid areas in the coastal plain during glacial and interglacial stages of the Late Pleistocene.

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Blechnaceae da Estação Ecológica do Panga, Uberlândia, Minas Gerais, Brasil

Cited by 7 publications

References 8 publications

The shared influence of phylogeny and ecology on the reproductive patterns of Myrteae (Myrtaceae)

The shared influence of phylogeny and ecology on the reproductive patterns of Myrteae (Myrtaceae)

Pteridoflora da Universidade Federal de Santa Maria (UFSM), campus Palmeira das Missões, RS, Brasil

Bryophyte and pteridophyte spores and other palynomorphs in quaternary marine sediments from Campos Basin, southeastern Brazil: Core BU-91-GL-05

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