Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 27 for “"frugivores"”.
-
Nonrandom seed dispersal by lemur frugivores: mechanism, patterns and impacts
Frugivores act as seed-dispersal agents in many ecosystems. Thus, understanding the roles and impacts of seed dispersal by frugivores is important to understand the structure and diversity maintenance of plant communities. Frugivore-mediated seed dispersal is behaviorally driven, generating …
-
Seed Dispersal by Fall Migrant Frugivorous Birds in an East-Central Illinois Woodland (Treefall Gap)
… the pre- and post-foraging movements of frugivores, I found that, after eating fruit, canopy frugivores left fruiting plants at a higher rate of speed than did understory frugivores. Canopy frugivores also had a higher probability of depositing seeds in treefall gaps than did understory …
-
Seed dispersal of western and Utah junipers: the role of scatter-hoarding rodents.
… of Juniperus seeds is generally attributed to frugivores, both avian and mammalian. Junipers produce female cones with a husk enclosing the seeds that closely resemble fruit, thus they are often referred to as berries. These cones differ among juniper species with some species producing very …
-
Primate-Plant Interactions in the Tropical Dry Forests of Northwestern Madagascar: Seed Dispersal and Sensory Ecology of Eulemur fulvus.
Fruiting plants and frugivores are involved in a complex set of interactions. Frugivores rely on fruiting plants as critical food resources, while fruiting plants rely on frugivores for seed dispersal services. Here, I measure the interrelatedness of brown lemurs (Eulemur fulvus) and the endemic …
-
Avian ecology and rapid morphological change in a novel plant-frugivore system
… on the Hawaiian Island of Oʻahu where all native frugivores have gone extinct. To understand how the morphological changes may influence the species’ ecology, I then related their foraging and movement behavior to their morphology. Lastly, I used point counts conducted across the island to …
-
Manipulating social information to promote frugivory by birds on a Hawaiian island
… relationships between fruiting plants and frugivores are critical to maintain ecosystem functioning, especially in the tropics. On the island of Oʻahu, Hawaiʻi, all native, fruit-eating birds are extinct and several plant species are experiencing reduced recruitment likely due to a lack of …
-
Exotic Bird Invasion Into Forests of Hawaii: Demography, Competition, and Seed Dispersal
… plants. In an ecosystem where most native frugivores are extinct, introduced birds dispersed all common native plants in these forest sites but non-native plants were infrequently eaten and dispersed. Furthermore, introduced birds are effectively dispersing native seeds from native forest …
-
Fruits and frugivory in neotropical primates and in Amazonian flooded and unflooded forests
… networks between fruiting plants and vertebrate frugivores, whose interdependent relationship is fundamental to the functioning of tropical forests. This thesis examined these fruitfrugivore interactions at two contrasting scales, and using two different approaches. On a landscape scale in …
-
How does surface mining impact surrounding miombo woodland bird communities?
… species richness and the species richness of frugivores, granivores, insectivores, woodland and open habitat specialists, breeding and non-breeding species and Zambezian endemics. The results showed that distance from the mine and habitat structure did not significantly explain variation in …
-
Geographic range dynamics of South Africa's bird species
… of bird species, with the small insectivores and frugivores showing the largest increases.
-
The Curious Poisoned Weed: Poison Ivy Ecology and Physiology
… relationship between poison ivy and avian frugivores that not only disperse the drupes of poison ivy but also aid in reduction of fungal endophytic phytopathogens. A survey of poison ivy urushiols yielded that while variation in urushiol congeners was high across individuals, relative …
-
Composição da avifauna em uma parcela de vegetação perturbada na Baixada, em Majé, Estado do Rio de Janeiro, Brasil
… species among nectarivores than among either frugivores or insectivores. Sixty-two of the 99 species recorded in the study area in 1982 were mist-netted in the forest undergrowth. The guild signature of this sample did not match that of the entire avifauna. There was a bias towards capturing …
-
Effects of Forest Fragmentation on Central Amazonian Bird Demography
… to primary forest for all foraging guilds except frugivores, gap specialists and ant-following birds. Similarly, age ratios were skewed towards more adult insectivorous birds in older forest; these findings suggest that dominant individuals may preferentially use older forest. Our findings …
-
Seed dispersal effectiveness of samango monkey (Cercopithecus albogularis schwarzi)
… in SDE of neighbouring groups of social foraging frugivores, which possibly arose through ecological constraints associated with group size (Janson & van Schaik 1988; Chapman & Chapman 2000b). Intergroup variability in SDE could have important consequences on the maintenance of forest systems and …
-
Ecology and conservation of the southern woolly lemur (Avahi meridionalis) in the Tsitongambarika Protected Area
… folivores experience similar food constraints to frugivores.
-
The Influence of Human Disturbance on Avian Frugivory and Seed Dispersal in a Neotropical Rainforest
… of avian feeding guilds: insectivores and frugivores declined, while nectarivores and omnivores increased. Canopy cover declined with disturbance; along with plant abundance, this explained much of the variation in bird species composition. The rate of avian fruit consumption in removal …
-
Effects of seed dispersal by gibbons, sambar, and muntjac on Choerospondias axillaris demography, and the disruption of this mutualism by wildlife poaching
… only marginal variation in the impacts of these frugivores on tree abundance. Tree species more highly dependent on zoochorous seed dispersal will have more room for skewed interaction strengths among their dispersers. In measuring functional redundancy or in trying to predict the role of …
-
Effects of seed dispersal by gibbons, sambar, and muntjac on Choerospondias axillaris demography, and the disruption of this mutualism by wildlife poaching
… only marginal variation in the impacts of these frugivores on tree abundance. Tree species more highly dependent on zoochorous seed dispersal will have more room for skewed interaction strengths among their dispersers. In measuring functional redundancy or in trying to predict the role of …
-
Wax Myrtle and Myrtle Warblers: Reciprocal Specialization and its Consequences in a Temperate Fruit-Frugivore Interaction
… or the result of restricted options for frugivores. This dissertation documents a highly unusual case of reciprocal specialization between the myrtle group of yellow-rumped warblers (Dendroica coronata coronata) and wax myrtle (Myrica cerifera). Far from being one of a group of …
-
Birds in coffee agroforestry systems of West Lampung, Sumatra
… taxonomic diversity of birds than did forest. Frugivores, and birds of high conservation dependence, were poorly represented in coffee gardens. Microhabitat use by birds was significantly different between habitats, and it appeared that the birds did make use of structural features as they …
Page 1 of 2