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Usnea
Usnea
From Wikipedia, the free encyclopedia
 |
| Usnea australis |
| Scientific classification | |
|---|---|
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Lecanorales |
| Family: | Parmeliaceae |
| Genus: | Usnea |
| Species | |
| See text. | |
Seed dispersal
Seed dispersal
From Wikipedia, the free encyclopedia
 |
| Epilobium hirsutum seed head dispersing seeds |
Seed dispersal is the movement or transport of seeds away from the parent plant. Plants have limited mobility and consequently rely upon a variety of dispersal vectors to transport their propagules, including both abiotic and biotic
vectors. Seeds can be dispersed away from the parent plant individually
or collectively, as well as dispersed in both space and time. The
patterns of seed dispersal are determined in large part by the dispersal
mechanism and this has important implications for the demographic and
genetic structure of plant populations, as well as migration patterns and species interactions. There are five main modes of seed dispersal: gravity, wind, ballistic, water and by animals. Some plants are serotinous and only disperse their seeds in response to an environmental stimulus. It can be measured using seed traps.
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