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 Wysłany: Pią 8:19, 14 Sty 2011 Temat postu: mbt schuhe günstig Autumn and winter birds in Nan |
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Nanjing Botanical Garden in autumn and winter feeding of birds on the role of fruit trees
Hard seed coat of protection from damage, with some excreted with the droppings,[link widoczny dla zalogowanych], and some were directly spit. Some seeds in the appropriate habitat conditions, germination and growth will be able to become a new individual. Currently, the stream in the Botanical Garden Mountain maple,[link widoczny dla zalogowanych], hackberry communities, and in the hillsides of cork oak, pine, sweet gum has been found in hundreds of communities in the yew trees and tree seedlings, is caused by birds, seed dispersal ¨ ¨ . In addition, the hillside black pine, Pinus, Liquidambar communities and other natural habitats are a lot of camphor trees,[link widoczny dla zalogowanych], holly, heather and other species surgery spinulosa seedlings, but the fruits of these species are not adapted to the spread of wind or water, and in the seedlings within a certain distance around the corresponding mother tree were not there. So that some of these seedlings are mainly fruit feeding birds spread seeds due. From the perspective of landscape plants, birds feeding on fruit on ornamental trees caused some impact. However,[link widoczny dla zalogowanych], from the ecological analysis,[link widoczny dla zalogowanych], bird feeding fruit, not only won the nutrition, but also within the scope of its seed dispersal habitat is conducive to seed to reach a variety of habitats, increase seed germination, emergence of opportunities. This also avoids the natural fruit drop after the formation of high density only in the seeds of a tree distribution, and seed germination of the adverse effects of the normal. Birds feeding on the role of fruit trees, and the mechanism of fruit to attract birds, will not happen by chance, but Birds and seed development in the long-term evolution of interdependence, co-evolution of the results.
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