Fenologia de espécies arbóreas zoocóricas em uma floresta psamófila no sul do Brasil

Marchioretto, Maria Salete; Mauhs, Julian; Budke, Jean Carlos

doi:10.1590/s0102-33062007000100018

Cited by 33 publications

(32 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is likely that the variation of approximately 3.5 h in the photoperiod over the course of a year in the coastal region of Rio Grande do Sul, together with the direct effects of changes in temperature, triggers predictable physiological responses in several species (Marchioretto et al 2007), as was observed for C. corcovadensis in the present study, as well as and for C. atrovirens and Dicksonia sellowiana in the studies conducted by Schmitt et al (2009) and Schmitt & Windisch (2012), respectively. In a study of 16 fern species in a subtropical broadleaf forest in northeastern Taiwan, Lee et al (2009) reported that leaf senescence, spore maturation and spore release all presented significant positive correlations with temperature but not with precipitation, which is in agreement with our findings for C. corcovadensis.…”

Section: Discussionsupporting

confidence: 61%

Phenology, caudex growth and age estimation of Cyathea corcovadensis (Raddi) Domin (Cyatheaceae) in a subtropical forest in southern Brazil

2014

View full text Add to dashboard Cite

Cyathea corcovadensis (Raddi) Domin occurs in northeastern, southeastern and southern Brazil, being widely distributed in the last. This was a three-year study, conducted from August 2008 to July 2011, in which we evaluated C. corcovadensis in a subtropical forest in southern Brazil. We also estimated the ages of the plants. Except in June and July of 2009, monthly leaf emergence and senescence were continuous and irregular, which prevented total leaf abscission, during that first year. Leaf emergence, senescence and fertility correlated with photoperiod, temperature and plant height, whereas rainfall was not a good predictor of C. corcovadensis phenophase. Within the forest fragment studied, the high proportion of fertile individuals (63.3%) indicated that the population has the potential to increase in size. The mean annual caudex growth rate was 4.66-8.23 cm and was statistically equivalent among the three years evaluated. The number of leaves per plant remained stable throughout the study period. Among plants that were 4 m tall, the mean estimated age was 60.3 years when calculated on the basis of overall height and mean annual growth rate, compared with only 46.9 years when calculated on the basis of the number of total leaf scars or petiole remains on the caudex and mean annual leaf production.Key words: growth rates, monitoring, tree fern, climatic variables Acta Botanica Brasilica 28(2): 274-280. 2014.Phenology, caudex growth and age estimation of Cyathea corcovadensis (Raddi) Domin (Cyatheaceae) in a subtropical forest in southern Brazil

show abstract

Section: Discussionsupporting

confidence: 61%

Phenology, caudex growth and age estimation of Cyathea corcovadensis (Raddi) Domin (Cyatheaceae) in a subtropical forest in southern Brazil

2014

View full text Add to dashboard Cite

show abstract

“…As in many tropical species that produce flowers coinciding with increases in solar radiation, temperature, and photoperiod (Bhat 1992;Wright & Schaik 1994;Talora & Morellato 2000;Marchioretto et al 2007), E. tetrapetala flowering showed correlations with solar radiation and photoperiod in some study years, but not with temperature. E. tetrapetala altered its flowering period to accompany rainfall oscillations provoked by the El Niño phenomenon.…”

Section: Discussionmentioning

confidence: 85%

The influence of El Niño and edge effects on the reproductive phenology and floral visitors of Eschweilera tetrapetala Mori (Lecythidaceae), an endemic species of the Atlantic Forest of northeastern Brazil

2017

View full text Add to dashboard Cite

We compared the reproductive phenology and fl oral visitors of Eschweilera tetrapetala growing along the edge and in the interior of a submontane forest in the Chapada Diamantina mountains, Bahia State, Brazil. We sought to determine if there were inter-annual diff erences in intensity and seasonality associated with environmental conditions, and if there were diff erences in fl oral visitors between the two environmental contexts. Phenological observations were performed for three years, and included the occurrence of an El Niño event. We applied circular statistics to detect seasonal trends, performed cross correlations between phenophases and climate, Kruskal-Wallis and Wilcoxon signed-rank tests for inter-annual variation, and the Wilcoxon-Mann-Whitney test for edge-interior diff erences in the species richness of fl oral visitors. We observed inter-annual variations in the intensity and seasonality of fl ower production that accompanied variations in rainfall, possibly associated with El Niño events. Floral visitor richness diff ered between the forest edge and interior, with seven species recorded for the interior and only one for the edge. Reduced fruit set was also observed at the forest edge. Th is study contributes to our understanding of the infl uence of El Niño and edge eff ects on the reproductive phenologies of tropical plants.

show abstract

“…Numerosos estudos fenólogicos, tanto em savanas (Mantovani & Martins 1988;Gouveia & Felfi li 1998;Batalha & Mantovani 2000;Batalha & Martins 2004; 2005; Lenza & Klink 2006;Tannus et al 2006;Munhoz & Felfi li 2007) como em fl orestas tropicais (Morellato et al 2000;Reys et al 2005;Marchioretto et al 2006;Yamamoto et al 2007;O'Brien et al 2008) têm apontado questões importantes em relação ao funcionamento dos ecossistemas, tais como magnitude da deciduidade, grau de sincronia entre as principais fenofases e causas proximais e fi nais dos eventos fenológicos (Williams et al 1997).…”

Section: Introductionunclassified

Fenologia de uma comunidade arbórea em cerrado sentido restrito, Barra do Garças, MT, Brasil

2009

View full text Add to dashboard Cite

RESUMO -(Fenologia de uma comunidade arbórea em cerrado sentido restrito, Barra do Garças, MT, Brasil). Analisamos a fenologia vegetativa e reprodutiva procurando relacionar mudanças nas fenofases com variáveis abióticas (precipitação, temperatura e fotoperíodo) e investigamos a ocorrência de sazonalidade. A região apresenta verão chuvoso (outubro-abril) e inverno seco (maio-setembro). Entre out/2005 e set/2007, 1.221 indivíduos pertencentes a 84 espécies foram monitorados mensalmente quanto a presença/ausência e intensidade das fenofases queda foliar, brotamento, fl oração e frutifi cação. A maioria das espécies apresentou estratégia fenológica vegetativa decídua (44%) ou brevidecídua (16%). A queda foliar foi correlacionada negativa e signifi cativamente com precipitação e fotoperíodo, apresentando data média em agosto. O brotamento apresentou correlação positiva com temperatura média mensal. Floração e frutifi cação ocorreram nos dois anos em 69 espécies. Houve maior concentração de fl ores nos meses de maior estresse hídrico (jul-ago). A frutifi cação de espécies zoocóricas (70% das espécies na área) ocorreu de forma contínua, sendo correlacionada negativamente com precipitação e positivamente com temperatura. A frutifi cação das anemocóricas ocorreu nos meses mais secos. Nossos resultados sugerem padrões fenológicos sazonais, sendo que na transição entre estações seca e chuvosa ocorreu maior atividade vegetativa e reprodutiva. Esses padrões fenológicos têm sido comumente encontrados no cerrado brasileiro e sugerem que a época de dispersão, germinação de sementes e de estabelecimento de plântulas é um fator importante para sincronizar a maturação dos frutos no início da estação chuvosa. Palavras-chave: brotamento, fl oração, frutifi cação, queda foliar, savana neotropical, sazonalidade climática ABSTRACT -(Phenology of a tree community in a cerrado sensu stricto, Barra do Garças, Mato Grosso state, Brasil). We observed leaf and reproductive phenology and analyzed the relationship among phenophases and abiotic variables (rainfall, temperature and photoperiod) and investigated the occurrence of seasonality. The local climate is characterized by marked wet (October-April) and dry seasons (May-September). From October 2005 to September 2007, 1221 individuals of 84 species were observed monthly for changes in leaf fall, leaf fl ush, fl owering and fruiting. Deciduous (44%) and brevideciduous (16%) species were predominant in the area. The leaf fall was negatively correlated with rainfall and photoperiod, with mean date in August. Leaf fl ush was positively correlated with temperature. Flowering and fruiting were observed in both years for 69 species. Flowering occurred mainly at the dry season (July-August) and was inversely correlated with rainfall. The zoochorous species were predominant in the community. Fruiting of anemochorous species was inversely correlated with rainfall. Fruiting of zoochorous species occurred continually throughout the year and was negatively correlated with rainfall and positively with ...

show abstract

Fenologia de espécies arbóreas zoocóricas em uma floresta psamófila no sul do Brasil

Cited by 33 publications

References 16 publications

Phenology, caudex growth and age estimation of Cyathea corcovadensis (Raddi) Domin (Cyatheaceae) in a subtropical forest in southern Brazil

Phenology, caudex growth and age estimation of Cyathea corcovadensis (Raddi) Domin (Cyatheaceae) in a subtropical forest in southern Brazil

The influence of El Niño and edge effects on the reproductive phenology and floral visitors of Eschweilera tetrapetala Mori (Lecythidaceae), an endemic species of the Atlantic Forest of northeastern Brazil

Fenologia de uma comunidade arbórea em cerrado sentido restrito, Barra do Garças, MT, Brasil

Contact Info

Product

Resources

About