Dispersal is when a plant, animal, or other organism moves from where it was created to another site, usually for breeding or growing purposes. Seed dispersal is the movement, spread or transport of seeds away from the parent plant. dispersed definition: 1. past simple and past participle of disperse 2. to spread across or move away over a large area…. Dispersal "strategies" for plants Resistant seeds, spores (floating on salt water) Tiny size for distant transport by wind hitchhikers (phoresy): hooks, hairs for transport by animals animal hitchhikers: flower mites in hummingbird noses They eat the entire fruit and only the juicy part is digested by their system and the seed are excreted out in the form of their dropping, which forms into new plants. There are different ways in which animals and birds disperse the seeds. There are two types of dispersal: active and passive. Dispersal may arise within a population for several reasons, the evolution of which is well-studied and experimentally proven (Clobert et al., 2001). Dictionary ... of a lateral branch, enclosed when ripe by a conspicuous red or yellow fleshy arillus, which serves as an attraction to animals, and thus aids in the dispersal of the seeds. The state of a population of a given species, for example, an increase in number that causes greater population density, stimulates the dispersal of the animals. The dispersal of animals is usually linked with a change in abiotic and biotic environmental conditions and in the population size of the animals. Birds often fly far away from the parent plant and disperse the seeds in their droppings. 1. Introduction. Dispersal in Ecology : Definition & Explanation Optimal Foraging Theory & Its Impact on Animal Behavior Few animals and birds are attracted to bright colourful fruits. Chemicals in our native birds’ digestive systems help to weaken the tough coats around these seeds. How to use dispersal in a sentence. Animal dispersal. | Meaning, pronunciation, translations and examples Dispersal definition is - the act or result of dispersing; especially : the process or result of the spreading of organisms from one place to another. Learn more. Most people chose this as the best definition of dispersal: The act or process of dis... See the dictionary meaning, pronunciation, and sentence examples. Seed Dispersal by Animal and Birds . Plants have limited mobility and rely upon a variety of dispersal vectors to transport their propagules, including both abiotic vectors such as the wind and living vectors like birds.Seeds can be dispersed away from the parent plant individually or collectively, as well as dispersed in both space and time. Dispersal definition: Dispersal is the spreading of things over a wide area. 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