FRUGIVORIA AVES PDF
8 ago. Resumo: As aves figuram entre os mais importantes dispersores de sementes em praticamente todos os ambientes terrestres. Apesar de. Composição da avifauna, frugivoria e dispersão de sementes por aves em áreas de floresta estacional semidecidual e cerrado, no Parque Estadual de Porto. 11 mar. Os objetivos deste trabalho foram (1) comparar a frugivoria e a dispersão de sementes por aves frugívoras entre espécies de Ficus.
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Forests loss and habitat fragmentation due to agricultural activity could be related to different ecological processes such as biotic dispersion, as well as the maintenance of native plant diversity and exotic plant invasions.
We randomly selected three to five individuals with ornitochorous fruits at the sampling time March-June, We counted the fruits in focal plants once a week during two month. Fruit survival probability FSP was used as an indicator of fruit removal.
Ornitochorous plants included 15 species, mainly woody. The FSP for the plant community showed statistically significant differences between small fragments and continuous sites. FSP was lower in continuous forests than in small fragments. FSP in the exotic bush was lower than in the native bush species.
Contrary to bushes, FSP values in woody exotic species were higher than those for native species. Results suggest that the dispersion of the ornitochorous fruits would be related to the process of fragmentation, but small fragments are used by birds as feeding sites, which confers them a high conservation value.
This behavior of bird species would be important for the persistence and colonization of new sites for plant species with ornitochorous fruits, as well as for the conservation of small forests fragments frugivvoria within agro-ecosystems of central Argentina. Finalmente, en sitios de bosque continuo se compararon frjgivoria pares de especies arbustivas Lantana grisebachii Stuckert ex Seckt.
A su vez, frutos de Passiflora suberosa L. En todos los casos, los frutos son ingeridos enteros.
Zanthoxylum coco Gillies ex Hook. Por otro lado, algunos estudios muestran que los movimientos de aves son mayores dentro de bosques continuos feugivoria entre fragmentos Van Houtan et al. Plant reproductive susceptibility to habitat fragmentation: Enhanced seed dispersal of Prunus africana in fragmented and disturbed forests? Forest fragmentation severs mutualism between seed dispersers and an endemic African tree.
Theory and its application in a changing world. Effects of forest fragmentation on the granivory of differently sized seeds. Effects of habitat fragmentation on biodiversity. Annual Review of Ecology, Evolution and Systematics Fruit removal of an invasive exotic species Ligustrum lucidum in a fragmented landscape.
Journal of Arid Environments Ferreras AE, L Galetto. From seed production to seedling establishment: Important steps in an invasive process. Effects of ages fragmentation, anthropogenic edges and fruit colour on the consumption of ornithocoric fruits. Grilli G, L Galetto. The role of fruits traits frguivoria determining fruit removal in east Mediterranean ecosystems.
Seed dispersal and frugivory: Lindenmayer DB, J Fischer. Tackling the habitat fragmentation panchreston. Trends in Ecology and Evolution Revista Chilena de Historia Natural 73 3: Morales CL, L Galetto. Narosky T, D Izurieta.
Frugivory by birds in cerrado in the city of Uberlândia, Minas Gerais
Aves de Argentina y Uruguay: Spatial patterns of seed dispersal, their determinants and consequences for recruitment. Frugivory by birds in degraded areas of Brazil. Dispersal of Amazonian birds in continuous and fragmented forest. Seed dispersal patterns produced by white-faced monkeys: Journal of Ecology Avrs dispersal in anthropogenic landscapes. Do subtropical seasonal forests in the Gran Chaco, Argentina, have a future?
Biodiversity Heritage Library
SUMMARY Forests loss and habitat fragmentation due to agricultural activity could be related to different ecological processes such as biotic dispersion, as well as the maintenance of native frugivria diversity and exotic plant invasions. Satellite image of the central Argentina region, where the study sites are indicated.
The names of the main cities are included as a reference.
Life form and biogeographic status of ornithocorous species and Mean density individuals m -2 recorded in study sites of Chaco forest in Cordoba Province. Accumulated survival of fruits for: A Celtis ehrenbergiana and B Rivina humilis at forest frugivoroa and continuous sites of Chaco forest.
Mean fruits survival time days between fragments and continuous forest for woody plant species or species with other life forms. A two Passiflora species at continuous sites and one forest fragment. Casilla Valdivia – Chile Tel.: