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| Registros recuperados: 41 | |
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| Dominy, Nathaniel J; University of Hong Kong; njdominy@hkusua.hku.hk; Duncan, Brean; Dynamac Corporation, Kennedy Space Center; DuncaBW@kscems.ksc.nasa.gov. |
| Since the completion of the Navstar Global Positioning System (GPS) in 1995, the integration of GPS and Geographical Information Systems (GIS) technology has expanded to a great number of ecological and conservation applications. In tropical rain forest ecology, however, the technology has remained relatively neglected, despite its great potential. Notwithstanding cost, this is principally due to (1) the difficulty of quality satellite reception beneath a dense forest canopy, and (2) a degree of spatial error unacceptable to fine-scale vegetation mapping. Here, we report on the technical use of GPS/GIS in the rain forest of Kibale National Park, Uganda, and the methodology necessary to acquire high-accuracy spatial measurements. We conclude that the... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Kibale National Park; Uganda; Biodiversity conservation; Canopy interference; Differential correction; Frugivores; Geographic information systems; Global positioning system; Seed dispersal; Spatial ecology; Tropical rain forest; Vegetation mapping. |
| Ano: 2001 |
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| Lessa,Leonardo G.; Costa,Fabiane N.. |
| The food habits and seed dispersal promoted by Thrichomys apereoides (Rodentia, Echimyidae) were investigated in a Cerrado reserve in southeastern Brazil. Diet was determined by faecal analysis and seed dispersal was tested through seed germination experiments. As a result, 68 scats of T. apereoides were collected and in mean 76.5% contained arthropods, hymenoptera being the most frequent food item. Moderate to high germination rates obtained showed that, despite the efficiency of the rodent's feeding apparatus, small sized seeds of pioneer plants passed undamaged through the guts and remained viable. The high consumption of seeds belonging to pioneer plants (Clidemia urceolata and Miconia holosericea) emphasizes the importance of T. apereoides related to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado domain; Diet composition; Seed dispersal. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000200019 |
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| dos Santos Neto,Raymundo T. M; Guevara,Roberto; Lopes,Maria A. |
| The effectiveness of a seed disperser depends, among various factors still poorly understood for many Neotropical primates, on the amount of time seeds are retained within its digestive tract. This study tested the effects of sex, seed size and dietary fiber content on seed retention time in the digestive tract of black howler monkeys (Alouatta caraya). Experiments were performed using six captive individuals (three of each sex), six seed species distributed in three size classes (small, medium, and large), and three percentages of leaves in the diet (15, 30 and 60% of total food ingested). Retention times were recorded for 1767 recovered seeds, corresponding to 55% of the total ingested. More than 98% of these seeds were undamaged, suggesting the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alouatta caraya; Gastrointestinal passage time; Diet composition; Seed dispersal; Seed disperser effectiveness. |
| Ano: 2018 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832018000100010 |
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| Fernández,Alfonso; Sáiz,Francisco. |
| We investigated whether introduced European rabbit on Robinson Crusoe Island, Chile, has the potential to spread the seeds of the exotic Papaver somniferum (opium poppy) via endozoochory. A total of 1320 rabbit droppings were collected during early autumn in the study area and analyzed in laboratory with binocular magnifying glass. Seeds from six different species were found in the droppings: Papaver somniferum (Papaveraceae), Centaurea melitensis (Asteraceae), Amaranthus sp. (Amarantaceae), Melilotus indicus (Fabaceae), Rumex acetosella (Polygonaceae), and one unidentified species. Poppy seeds were dominant. Most seeds (82%) were destroyed during ingestion, but some of the intact seeds found in pellets remained viable. Germination rate of ingested seeds... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endozoochory; Gut passage; Invasive species; Seed dispersal. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832007000100003 |
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| Lôbo,D; Tabarelli,M; Leal,IR. |
| Although seed dispersal by ants might reduce seed predation near the parent plants, predation on discarded seeds clustered on nest refuse piles may reduce any initial benefit provided by seed removal. Here we examine the fate of Croton sonderianus seeds that were discarded by Pheidole fallax Mayr ants on their nest refuses in caatinga vegetation of northeast Brazil. We collected all seeds discarded in refuse piles of 20 nests and within a radius of 50 cm from their borders, and examined them for evidence of predation. A total of 3,017 seeds were recorded either located in the P. fallax refuse piles (89.1%) or nest vicinity (10.9%). Predation was three fold higher in nest vicinity as compared to refuse piles. By removing seeds from beneath parent plants and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Caatinga; Myrmecochory; Seed dispersal; Semi-arid vegetation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000400005 |
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| Silva, Roseane Karla Soares da; Feliciano, Ana Lícia Patriota; Marangon, Luiz Carlos; Lima, Rosival Barros de Andrade; Santos, Wedson Batista dos. |
| Este trabalho teve por objetivo conhecer a fitossociologia do componente arboreo em uma mata ciliar de um corrego que desagua no Rio Sirinhaem, localizado no Engenho Buranhem, Sirinhaem, PE e identificar as sindromes de dispersao das especies. O corrego esta situado em um fragmento de Floresta Ombrofila Densa de Terras Baixas, com 272 ha. Utilizou-se como area amostral um hectare (40 unidades amostrais, 10 m x 25 m) onde foram registrados 1.307 individuos arboreos com circunferencia a altura do peito (CAP) ≥ 15 cm. Foram identificadas 118 especies, pertencentes a 40 familias botanicas. Protium heptaphyllum e Pouteria sp.1 foram as especies mais abundantes. Em termos de valor de importancia (VI), as especies Protium heptaphyllum, Pouteria sp.1 e Virola... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed dispersal; Atlantic Forest; Phytosociology Dispersão de sementes; Mata Atlântica; Fitossociologia. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/284 |
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| Cazetta,Eliana; Zumstein,Liliane S.; Melo-Júnior,Tadeu A.; Galetti,Mauro. |
| Dehiscent fruits of Euphorbiaceae usually have two stages of seed dispersal, autochory followed by myrmecochory. Two stages of Margaritaria nobilis seed dispersal were described, the first stage autochoric followed by ornithocoric. Their dehiscent fruits are green and after they detached from the tree crown and fall on the ground, they open and expose blue metallic cocas. We studied the seed dispersal system of Margaritaria nobilis in a semi-deciduous forest in Brazil. In 80 h of focal observations, we recorded only 12 visits of frugivores, however the thrush Turdus leucomelas was the only frugivore that swallowed the fruits on the tree crown. Pitylus fuliginosus (Fringilidae) and Pionus maximiliani (Psittacidae) were mainly pulp eaters, dropping the seeds... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euphorbiaceae; Frugivory; Mimetic fruits; Seed dispersal; Secondary compounds. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000200012 |
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| FRANCISCO,MERCIVAL R.; GALETTI,MAURO. |
| Embora os estudos de frugivoria e dispersão de sementes sejam importantes para a realização de planos de manejo e recuperação de ambientes degradados, pouco tem sido pesquisado sobre o assunto no cerrado brasileiro. Neste trabalho são apresentados aspectos da frugivoria e dispersão das sementes de Ocotea pulchella Mart. (Lauraceae) por aves. Treze espécies de aves foram registradas consumindo os frutos de O. pulchella em 72 horas de observação focal, entre os meses de agosto e outubro de 1999, numa área de cerrado da região central do estado de São Paulo (21º58' S, 47º52' W), Brasil. As principais espécies potencialmente dispersoras foram o sabiá-pardão, Turdus leucomelas (Muscicapidae), o sabiá-docampo, Mimus saturninus (Mimidae), o bem-te-vi, Pitangus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed dispersal; Ocotea pulchella; Cerrado; Frugivory; Ornitochory. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000100003 |
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| Scultori,Carolina; Silva,Wesley R.. |
| ABSTRACT Neotropical bats are recognized as effective seed dispersers, especially of small-seeded pioneer plants during early stages of forest regeneration. There had been few reports on the ecology of the bat Pygoderma bilabiatum (Wagner, 1843), which appears to be mainly frugivorous and to undertake vertical migrations in Brazil. Our analyzes of fecal samples of P. bilabiatum specimens captured in mist nets and direct observations of their feeding behavior on Citharexylum solanaceum Cham. fruits in a mosaic of restored forests and forest fragments in southeastern Brazil constitute one of the few records of consumption of large-seeded fruits by P. bilabiatum, and indicate that it may be an important disperser for large-seeded plants. We found evidence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Movements; Philopatry; Fruit-bat interactions; Seed dispersal. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100336 |
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| Registros recuperados: 41 | |
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