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.
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Showing 1 to 20 of 128 for “"seed dispersal"”.
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Seed Dispersal by Aquatic Turtles
Seed dispersal capabilities by several common aquatic turtles in Southwestern Missouri were investigated. Fecal matter was first obtained during a summer seed survey in which stinkpots (Sternotherus odoratus), river cooters (Pseudemys concinna), spiny soft-shell turtles (Apalone spinifera), and …
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Agents of seed dispersal : animal--zoochary / Wind--anemonochory
Agents of seed dispersal is a project designed to address the increase of environmental degradation, which occurs as a result of the perpetual spread of the asphalt and concrete of the contemporary urban situation. Agents of Seed Dispersal proposes that the city is a natural ecosystem within the …
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Global change effects on ant-mediated seed dispersal
Seed dispersal mutualisms, including seed dispersal by ants, are critical to the assembly of communities and the function of ecosystems. However, the consequences of human-caused global change factors, such as habitat fragmentation and climate change, for the future of these mutualisms are not …
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Rodent Mediated Seed Dispersal of Joshua tree (Yucca brevifolia)
… little about the ecology of this species. The seed dispersal of Joshua tree, in particular, has not been thoroughly studied to this point. Here I examine the possible mechanisms acting to disperse Joshua tree seeds and their resulting fate. I hypothesized that Joshua tree seeds are cached by …
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Seed dispersal effectiveness of samango monkey (Cercopithecus albogularis schwarzi)
The effectiveness of a seed disperser is dependent on the impact it has on plant fitness. For fruiting species, plant fitness is dependent on the behaviour of its mutualists in (a) reducing seed mortality and (b) increasing the likelihood of future reproduction. The main aim of this thesis was to …
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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 …
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Comparing Phylogenetic and Deep Learning Methods to Predict Seed Dispersal Mode
… reduce carbon under the pressing global warming. Seed dispersal is a key process in natural forest regrowth, where seeds are moved away from parent plants to establish new growth. Dispersal modes include biotic and abiotic methods, and vary depending on traits such as seed shape, size, and color. …
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Exotic Bird Invasion Into Forests of Hawaii: Demography, Competition, and Seed Dispersal
… birds are effectively dispersing native seeds from native forest into adjacent sites currently dominated by non-native plants, allowing native forest to reestablish. These studies lay the foundation for understanding the full complexity and ramifications of the ecology of avian …
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Fruit bat diet, foraging ecology and seed dispersal in the Vhembe Biosphere Reserve.
… despite the vital ecosystem service of seed dispersal provided by fruit bats. Conflict between fruit bats and fruit farmers often stems from perceived or actual damage to their crops, especially during the harvest season. Such conflict often leads to the persecution of fruit bats, either …
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Seed dispersal of western and Utah junipers: the role of scatter-hoarding rodents.
The dispersal 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 …
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Bird Activity and Seed Dispersal in Two Neotropical Trees: Guarea Macrophylla and Trichilia quadrijuga
… Park, Peru, l investigated bird activity on and seed dispersal of two sympatric neotropical rain forest trees: Guarea macrophylla and Trichilia quadrijuga. Of 24 bird species that consumed Guarea fruits, only four (Catharus ustulatus, Myoidynastes luteiventris, Pipra coronata, and P. fasciicauda) …
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The Influence of Human Disturbance on Avian Frugivory and Seed Dispersal in a Neotropical Rainforest
… human activity influences avian frugivory and seed dispersal, bird-fruit interactions that facilitate plant reproduction. On Tobago (West Indies), I compared patterns of frugivory in three adjacent rainforest habitats along a gradient of increasing disturbance: primary forest in a reserve, …
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Seed Dispersal by Fall Migrant Frugivorous Birds in an East-Central Illinois Woodland (Treefall Gap)
I investigated patterns of seedfall, avian frugivore pre- and post-foraging behavior, and seed germination and seedling success for several species of bird-dispersed plants in an east-central Illinois deciduous woodland. Using seed traps and a combination of natural and artificial fruit displays, I …
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Are black bears (Ursus americanus) effective seed dispersal agents? With a little help from their friends.
… americanus) are generally considered effective seed dispersal agents for fleshy-fruited plants because they can consume hundreds of fruits at once and have large home ranges. Seedlings can emerge from fecal piles, but if any seeds are removed from feces by rodents, it is often considered seed …
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Linking Spatial Patterns of Seed Dispersal and Plant Recruitment in a Neotropical Tree, Virola Calophylla (Myristicaceae)
Seed dispersal establishes the initial spatial template upon which demographic processes are played out to produce spatial structure in plant populations. The objective of this investigation was to develop a thorough understanding of the spatial pattern of seed dispersal, the factors affecting it, …
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Linking mechanism to pattern in community assembly: Ant-mediated seed dispersal in neotropical pioneer tree species
Dispersal is a fundamental process that affects all aspects of an organism’s biology including its distribution, genetic structure, demography, and reproduction. Ant-mediated seed dispersal has evolved multiple times in many biogeographical locations. Most research in this area has focused on …
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The natural history, sensory ecology and biogeography of the seed dispersal of large fruits in Fynbos
Seed dispersal is a crucial life-history stage for the regeneration of all reseeding plants. In the Fynbos Biome of the Greater Cape Floristic Region (GCFR) of South Africa, at least 100 plant species have seed traits that suggest they are scatterhoarded by small mammals. The aims of this thesis …
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