Dispersão de sementes de Vismia cayennensis (Jacq.) Pers. (Guttiferae) por morcegos na região de Manaus, Amazonas

Marinho‐Filho, Jader; Vasconcellos‐Neto, João

doi:10.1590/s0102-33061994000100009

Cited by 10 publications

(8 citation statements)

References 5 publications

(3 reference statements)

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“…Seed dispersal evaluation -Fruit position in relation to the architecture of branches and leaves is considered a good trait to point to its frugivores and how they access the fruit (Pijl 1972;Uieda &Vasconcellos-Neto 1985;Marinho-Filho & Vasconcellos-Neto 1994). Fruits can be exposed outside the top (upper, below), and could also be at the same level or inside the foliage.…”

Section: Methodsmentioning

confidence: 99%

Seed dispersal of Solanum thomasiifolium Sendtner (Solanaceae) in the Linhares Forest, Espírito Santo state, Brazil

Vasconcellos‐Neto

Albuquerque²,

Silva

2009

Acta Bot. Bras.

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RESUMO -(Dispersão de sementes de Solanum thomasiifolium Sendtner (Solanaceae) na Floresta de Linhares, Espírito Santo, Brasil). O propósito deste estudo foi analisar a dispersão de sementes e o estabelecimento de Solanum thomasiifolium em uma área de vegetação de "nativo" no Estado do Espírito Santo, na costa do sudeste do Brasil. Dez espécies de aves, o cachorro-do-mato (Cerdocyon thous) e uma espécie de lagarto (Tropidurus torquatus) alimentaram-se de frutos de S. thomasiifolium e dispersaram sementes viáveis em suas fezes. A contribuição proporcional de cada um destes grupos na dispersão de sementes foi de 77% para aves, 19% para o cachorro-do-mato e 4% para o lagarto. Formigas também contribuíram com a dispersão de sementes. Mais sementes foram depositadas nas ilhas de vegetação do que nas áreas abertas vizinhas. As taxas de germinação de sementes oriundas de frutos (controle), fezes de aves, fezes do cachorro do mato e do lagarto foram, respectivamente, 64 %, 64 %, 53% e 80%. As diferenças entre estas taxas foram todas signifi cativas, exceto entre o controle e fezes de aves. Lagartos foram importantes como transportadores de sementes entre ilhas de vegetação próximas e defecaram uma grande proporção de sementes viáveis. As aves e o cachorro-do-mato não aumentaram a germinação de sementes, mas promoveram a dispersão sobre uma área maior. A arquitetura da planta, a produtividade de frutos, as características do fruto e a diversidade de frugívoros são importante no sucesso de S. thomasiifolium para colonização do habitat. Palavras-chave: aves, cachorro-do-mato, deposição de sementes, frugivoria, germinação, lagarto ABSTRACT -(Seed dispersal of Solanum thomasiifolium Sendtner (Solanaceae) in the Linhares Forest, Espírito Santo state, Brazil). The aim of this study was to analyse seed dispersal and establishment of Solanum thomasiifolium in an area of "nativo" vegetation in Espirito Santo state on the southeastern Brazilian coast. Ten species of birds, the crab-eating fox (Cerdocyon thous), and one species of lizard (Tropidurus torquatus) fed on S. thomasiifolium fruits and dispersed viable seeds in their faeces. The proportional contribution of each of these groups to seed dispersal was 77% (birds), 19% (crab-eating fox) and 4% (lizards). Ants also contributed to seed dispersal. More seeds were deposited in vegetation islands than in the surrounding open areas. Germination rates of seeds collected directly from fruit (control), bird droppings, the faeces of crab-eating foxes and lizards were, respectively, 64, 64, 53, and 80 %. Differences among these rates were all signifi cant, except between birds and control. Lizards were important as seed carriers between nearby islands and they expelled a higher proportion of viable seeds. Birds and the crab-eating foxes did not enhance seed germination, but promoted seed dispersal over a wider area. Plant architecture, fruit productivity, fruit characteristics and the diversity of frugivores are important for the success of S. thomasiifolium in habitat colonization.

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Section: Methodsmentioning

confidence: 99%

Seed dispersal of Solanum thomasiifolium Sendtner (Solanaceae) in the Linhares Forest, Espírito Santo state, Brazil

Vasconcellos‐Neto

Albuquerque²,

Silva

2009

Acta Bot. Bras.

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“…Frugivorous bats have great ecological importance due to their role in regulating tropical ecosystems, such as the Atlantic Forest, where they are crucial for the dynamics and regeneration of tropical forests, including the establishment of pioneer species (Marinho-Filho & Vasconcellos-Neto, 1994;Cole & Wilson, 1996;Mikich & Bianconi, 2005;Mello et al 2008). Abiotic factors such as temperature and photoperiod, have a great influence on the reproductive cycle of bats (Heideman et al 1992;Mello et al 2009).…”

Section: Introductionmentioning

confidence: 99%

“…It has been demonstrated that the reproductive cycle of the bat Sturnira lilium can be directly influenced by factors such as temperature and food availability (Bronson, 1985;Mello et al 2009). This species has great ecological importance for its role in the pollination and constitutes important seed dispersers of various tropical plants (Marinho-Filho & Vasconcellos-Neto, 1994;Vieira & Carvalho-Okano, 1996;Sazima et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Stages and duration of the seminiferous epithelium cycle in the bat Sturnira lilium

et al. 2013

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Knowledge of the stages that compose the seminiferous epithelium cycle (SEC) and determination of the duration of spermatogenic processes are fundamental for the accurate quantification of the dynamics of spermatogenesis. The aim of this study was to characterize the stages that compose the SEC of the bat Sturnira lilium, including evaluation of the average frequency of each of these stages throughout the year and calculation of the duration of the spermatogenic process. An ultrastructural characterization of the formation of the acrosomal cap was also performed. Testicular fragments were processed for morphological and immunohistochemical analysis as well as ultrastructural analysis using transmission electron microscopy. According to the tubular morphology method, the SEC in S. lilium is divided into eight stages, following the pattern found in other mammals. Primary spermatocytes were found at zygotene in stage 1 of the cycle. There was no variation in frequency of each of the stages over the seasons, with stage 1 being the most frequent, and stage 7 the least frequent. The duration of one seminiferous epithelium cycle was 3.45 days, and approximately 15.52 days were required for the development of sperm from spermatogonia. Ultrastructural characterization allowed the formation of the acrosomal cap in round spermatids to be monitored. In conclusion, the stages that compose the SEC in S. lilium are generally similar to those described for other mammals, but the duration of the spermatogenic process is shorter than previously recorded for mammals. The presence of primary spermatocytes at zygotene in stage 1 of the cycle is probably due to the longer duration of this stage.

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“…As plantas zoocóricas são adaptadas para atraírem e recompensarem seus dispersores potenciais (Howe, 1980;Marinho-Filho & Vasconcelos-Neto, 1994). Nas florestas tropicais mais de 75% das espécies de árvores produzem frutos carnosos adaptados para o consumo de aves e mamíferos (Howe & Smallwood, 1982;as sementes encontradas nas fezes passam intactas pelo trato digestório do animal.…”

Section: Introductionunclassified

O mico-leão-dourado ( Leontopithecus rosalia) como dispersor de sementes na Reserva Biológica União/IBAMA, Rio das Ostras, RJ.

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Dispersão de sementes de Vismia cayennensis (Jacq.) Pers. (Guttiferae) por morcegos na região de Manaus, Amazonas

Cited by 10 publications

References 5 publications

Seed dispersal of Solanum thomasiifolium Sendtner (Solanaceae) in the Linhares Forest, Espírito Santo state, Brazil

Seed dispersal of Solanum thomasiifolium Sendtner (Solanaceae) in the Linhares Forest, Espírito Santo state, Brazil

Stages and duration of the seminiferous epithelium cycle in the bat Sturnira lilium

O mico-leão-dourado ( Leontopithecus rosalia) como dispersor de sementes na Reserva Biológica União/IBAMA, Rio das Ostras, RJ.

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