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发表于 2020-4-7 12:12:18
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A viewpoint to Invasive Species VS. Exotic Species:
As warned by Biodiversity conservation guidelines by UN Biodiversity International Organization, it is not to introduce exotic species into native ecosystem, which may become invasive species. For the well-maintained ecosystem, introducing exotic species by human disturbance usually is considered to be detrimental. However, with the natural environmental change in the long term, the community of indigenous specie goes through natural succession process, which is replaced by exotic speices. Sometimes these exotic species is introduced by other animals (such as birds with migrated habits) as well. This is the reasonable natural selection process driven by the inter-species competitions, because the purpose of biodiverstiy conservation is not due to the mercy nature. However, human disturbances in terms of introducing exotic species is not allowed in most cases.
However, for the restoration of degraded or deforestation ecosystem, if the indigenous species can hardly maintain the functions of native ecosystem due to the environmental change in regional or global scales, introducing exotic species is an alternative to restore the ecosystem. In this case, the biomass production and the ecosystem functions (such as prevention of soil erosion or reserving rainwater) are the primary principles for the restoration. |
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