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|標題:||An optimal approach to degraded land: passively natural recovery by spontaneous succession vs. actively ecological restoration by human intervention|
passively natural succession
actively artificial restoration
For remedying the gradually serious ecosystem degradation, restoration ecology had been developed energetically over the last two decades. The decision must be made, passively spontaneous succession vs. actively ecological restoration, to recover the degraded land. This paper interpreted and illustrated the processes of ecological degradation and recovery, the factors affecting plant regeneration, and the major considerations for adopting appropriate strategy to repair the degraded lands. We suggested that ecological restoration must be based on the scientific knowledge, and then be manipulated carefully. When the degraded site is small area, with slight degradation and higher resilience, and surrounded by natural vegetation, the passively spontaneous succession is sufficient without human intervention. When the degraded site is extensive, with heavy degradation and lower resilience, and absence of remnant vegetation, the actively ecological restoration is necessary. We suggested that put natural succession theory in artificial restoration practice, they complement and supplement each other. Consequently, a mixed passive-active repair manipulation should be the most effective approach. For some degraded sites the minimum intervention approach is a considerable option. For example, adding indigenous seeds appropriate to local environment could facilitate the recovery of rich forest. When one rushed plants the incongruous trees without careful investigation and planning would often be doomed to failure and be in vain.
|Appears in Collections:||第37卷 第02期|
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