Fenologia de Lianas y Arboles Anemocoros en Una Selva Calido-Humeda de Mexico

Ibarra‐Manríquez, Guillermo; Sanchez-Garfias, Beatriz; González-García, Laura

doi:10.2307/2388201

Cited by 48 publications

(29 citation statements)

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“…A anemocoria é a segunda síndrome de dispersão em importância para todas as espécies da comunidade, antecedida somente pela zoocoria que, em florestas tropicais conservadas é a síndrome de mais de 75% das espécies (Howe & Smallwood 1982, Ibarra-Manríquez et al 1991. Martins et al (1995) avaliaram as síndromes de dispersão de 520 espé-cies arbóreas de Mata Atlântica e encontraram 75% de zoocoria e 18% de anemocoria.…”

Section: Discussão Mesesunclassified

Floração e chuva de sementes em mata secundária em São Paulo, SP

Penhalber¹,

Vani²

1997

Rev. bras. Bot.

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-(Flowering and seed rain in a secondary forest in São Paulo, southeastern Brazil). Flowering and seed rain in a secondary forest in São Paulo, southeastern Brazil, were studied through the collection of reproductive material obtained from seed traps of 0.5 x 0.5 m. Collections were made on a monthly basis between January and December, 1993. Ninety species belonging to 37 families were identified in the collected reproductive material. Seasonal flowering and fruiting patterns were observed in the forest. The majority of the species flowered from September; peaks in the flower and fruit abundance were observed in November. The flowering pattern was the same observed in other forests of the region, but the fruiting pattern was more seasonal. From the seed rain, it could be deduced that the anemochorous species dispersed their seeds mainly in November, at the onset of the rainy season and not in the dry season as was expected. The majority of zoochorous species dispersed their seeds during the middle of the rainy season, with a peak in January, when the conditions for fruit ripening, seed dispersal and seedling establishment were optimal. The largest quantity of seeds was produced by the lianas while the group of trees was the richnest in species.RESUMO -(Floração e chuva de sementes em mata secundária em São Paulo, SP). O florescimento e a chuva de sementes foram estudados em trecho de mata secundária em São Paulo, SP, através da coleta de material reprodutivo depositado em peneiras de 0,5 x 0,5 m, recolhido mensalmente entre janeiro e dezembro de 1993. Foram identificadas 90 espécies pertencentes a 37 famílias. Observaram-se padrões sazonais de floração e de frutificação, sendo que a maioria das espécies floresceu a partir de setembro, com picos de floração e de frutificação em novembro. O padrão de floração encontrado foi o mesmo verificado em outras florestas da região, sendo o de frutificação mais sazonal. Na chuva de sementes, as espécies anemocóricas dispersaram propágulos predominantemente em novembro, no início das chuvas e não durante a estação seca, como esperado. A maioria das espécies zoocóricas liberou propágulos durante o meio da estação chuvosa, com pico em janeiro, na época de melhores condições de amadurecimento do fruto, dispersão de sementes e estabelecimento de plântulas. As lianas produziram a maior quantidade de propágulos, enquanto das arbóreas obteve-se o maior número de espécies.

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Section: Discussão Mesesunclassified

Floração e chuva de sementes em mata secundária em São Paulo, SP

Penhalber¹,

Vani²

1997

Rev. bras. Bot.

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“…In tropical forests, the flowering of palm trees communities can be affected by variation in climate during the year, being concentrated in the rainy (De Steven et al 1987) or in the dry season (Ibarra-Manríquez 1992). In some plant communities, even with pronounced dry season, palm trees can bloom during the whole year (Henderson et al 2000), but at the species or genus level, individuals tend to bloom in a specific climatic season (Henderson et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Growth and reproduction of the understory palm Geonoma schottiana Mart. in the gallery forest in Central Brazil

Sampaio¹,

Scariot²

2008

Rev. bras. Bot.

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-(Growth and reproduction of the understory palm Geonoma schottiana Mart. in the gallery forest in Central Brazil). To understand the growth and reproduction of the palm Geonoma schottiana in the gallery forest of Central Brazil, two hypotheses were raised: (i) production of leaves and reproductive structures are concentrated in the period of the year with high light availability; (ii) leaf production and reproductive activity are related to plant length. However, it is expected that senility effects will cause fast reduction in growth and reproduction activities in higher plants. Growth and reproduction were concentrated in the dry season, when insolation is higher than in the wet season, suggesting that leaf and inflorescence production on G. schottiana in the gallery forest understory is more limited by light than by soil humidity. As the individual grows, leaf number and blade area increase, but reproduction activity is independent of plant length. Resources stored in the stem are important to growth, but exogenous factors, as canopy openness, should be more important to reproduction. Plant senescence seems to have a lesser effect on the production of vegetative and reproductive structures in G. schottiana than has been detected in congeneric species with greater clonal activity.Key words -life stage, reproductive and vegetative phenology, seasonality, senescence RESUMO -(Crescimento e reprodução da palmeira de sub-bosque Geonoma schottiana Mart. em mata de galeria no Brasil Central). Para compreender os fatores que influenciam o crescimento e a reprodução de Geonoma schottiana em mata de galeria no Brasil Central, foram levantadas duas hipóteses: (i) a produção de folhas e de estruturas reprodutivas está concentrada no período do ano de maior insolação; (ii) a produção de folhas e a atividade reprodutiva estão relacionadas ao comprimento do indivíduo. Entretanto, espera-se encontrar uma redução brusca nas atividades de crescimento e reprodução em indivíduos mais altos devido aos efeitos da senilidade. O crescimento e a reprodução ocorreram concentrados na estação seca, quando a insolação é maior do que na estação úmida. Assim, a produção de folhas e inflorescências de G. schottiana no sub-bosque de matas de galeria pode ser mais limitada pela luminosidade do que pela umidade do solo. Conforme o indivíduo cresce, o número de folhas e a área foliar aumentam, mas a atividade reprodutiva foi independente do comprimento do indivíduo. Os recursos armazenados no estipe são importantes para o crescimento, embora os fatores exógenos, como a abertura do dossel, possam ser mais importantes para a reprodução do que os carboidratos armazenados. A senilidade dos indivíduos parece ter um efeito menor na produção de estruturas vegetativas e reprodutivas ao contrário do que o tem sido detectado em espécies

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“…In the specific case of palms, a number of studies have shown that flowering in tropical species is concentrated in one season, whereas non-tropical species may be observed flowering throughout the year (Steven et al, 1987;Ibarra-Manríquez, 1992). Considering a given species or genus, however, individual palms tend to flower only during a specific climatic season, with phenology being related primarily to pollinator abundance.…”

Section: Introductionmentioning

confidence: 99%

Reproductive phenology of Mauritia flexuosa L. (Arecaceae) in a coastal restinga environment in northeastern Brazil

et al. 2017

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The buriti, Mauritia flexuosa, is the most common palm in Brazil, where it has considerable ecological and economic importance. However, few data are available on the phenology of the species, mainly in coastal restinga ecosystems. The present study monitored the reproductive phenology of M. flexuosa in the restinga of Barreirinhas, in the Brazilian Northeast, and investigated the relationship between phenophases and climatic variables. The presence/absence of flowers and fruits was recorded monthly in 25 individuals of each sex between August, 2009, and October, 2012. There was no difference in the phenology of male and female specimens, with flowering and fruiting occurring exclusively in the dry season. We believe that the specific abiotic characteristics of the study environment, such as the intense sunlight and availability of water in the soil, contribute to the reproductive success of M. flexuosa in the dry season, with consequent germination and establishment of seedlings occurring during the subsequent rainy season.Keywords: buriti, ecology, Maranhão, palm tree. Fenologia reprodutiva de

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Fenologia de Lianas y Arboles Anemocoros en Una Selva Calido-Humeda de Mexico

Cited by 48 publications

References 0 publications

Floração e chuva de sementes em mata secundária em São Paulo, SP

Floração e chuva de sementes em mata secundária em São Paulo, SP

Growth and reproduction of the understory palm Geonoma schottiana Mart. in the gallery forest in Central Brazil

Reproductive phenology of Mauritia flexuosa L. (Arecaceae) in a coastal restinga environment in northeastern Brazil

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